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imagen-ps5tw-bt                NEW !!!cod-seccioncometasCOMET OBSERVATIONS DATABASE

RECIENTES OBSERVACIONES VISUALES & CCD / RECENT COMET OBSERVATIONS
(actualizada al 24 de Noviembre de 2017 / Update 2017, November 24 – cometas.liada [AT] gmail.com)

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Update: C/2017 O1 (ASASSN) COD, C/2016 R2 PANSTARRS COD, C/2016 N6 (PANSTARRS) COD, C/2016 N4 (MASTER) COD, C/2016 M1 (PANSTARRS) COD, C/2016 B1 (NEOWISE) COD, C/2015 VL62 Lemmon-Yeung-PanSTARRS COD, C/2015 V2 (Johnson) COD, C/2015 V1 (PANSTARRS) COD, C/2015 O1 (PANSTARRS) COD, C/2015 ER61 (PANSTARRS) COD, 240P/NEAT COD, 217P/LINEAR COD, 213P/Van Ness COD, 71P/Clark COD, 65P/Gunn COD, 62P/Tsuchinshan 1 COD, 41P/Tuttle-Giacobini-Kresak COD, 29P/Schwassmann–Wachmann 1 COD, 24P/Schaumasse COD

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C/2017 S6 (Catalina)
2017 Nov. 22.90 UT: m1=15.6, Dia.=0.2′, DC=3; 60-cm L (407x); Sandor Szabo (Hungary) [Very fast moving comet, easy to check its path among the stars in 10 minutes]

C/2017 O1 (ASASSN)
2017 Nov. 22.71 UT: m1=10.1, Dia.=3′, DC=2; 25.4-cm L (64x); Maik Meyer (Limburg, Germany)
2017 Nov. 18.77 UT: m1=10.7, Dia.=2.5′; 30.5-cm L (94x); J. P. Navarro Pina (El Ardal, Murcia, Spain) [Lm = 5.8 , Altitude = 700 mts.]
2017 Nov. 16.78 UT: m1=10.5, Dia.=3′, DC=1/; 13-cm L (103.2x); Alexsandr Morozov (Novozybkov, Russia) (S – Sidgwick`s method,Lm=6.10)
2017 Nov. 16.25 UT: m1=9.8, Dia.=5′, DC=2/; 20-cm SCT (77x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2017 Nov. 14.87 UT: m1=11.4, Dia.=2.0′, DC=5; 60-cm L (187x); Sandor Szabo (Hungary) [Elongated coma, short 2-3’ long tail is seen to PA: 210 deg]
2017 Nov. 14.76 UT: m1=10.5, Dia.=2.0′, DC=1; 30.5-cm L (94x); J. P. Navarro Pina (Puerto de la Cadena, Murcia, Spain) [360 mts altitude]
2017 Nov. 14.23 UT: m1=9.6, Dia.=5′, DC=2/; 20-cm SCT (77x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1490 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2017 Nov. 13.79 UT: m1=8.9, Dia.=5′, DC=2; 25×100 B; Juan Jose Gonzalez ( Puerto de Aralla, Leon, Spain; Alt. 1490 m, 42º 54′ N, 5º 48′ W ) [ Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2017 Nov. 13.71 UT: m1=9.6, Dia.=3.5´, DC=1/; 25.4-cm L f:5 (64x); Maik Meyer (Limburg, Germany)
2017 Nov. 11.95 UT: m1=9.8, Dia.=4.5′, DC=1; 20-cm L (63x); Valentín Díaz (La Romaneta, Alicante, España)
2017 Nov. 06.75 UT: m1=8.6, Dia.=7′, DC=2/; 25×100 B; Juan Jose Gonzalez (Cruce de Aralla – Embalse de Barrios de Luna, Leon, Spain; Alt. 1110 m, 42º 54′ N, 5º 52′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.0. Mountain location, very clear sky]
2017 Nov. 05.86 UT: m1=10.6, Dia.=3′, DC=1; 30,5 cm L (94x); J. P. Navarro Pina (Puerto de la Cadena, Murcia, Spain) [Moonlight Full]
2017 Nov. 02.17 UT: m1=9.2, Dia.=6′, DC=2/; 25.4-cm L f:5 (64x); Maik Meyer (Limburg, Germany)
2017 Nov. 01.87 UT: m1=10.5, Dia.=3′, DC=2; 30.5-cm L (94x); J. P. Navarro Pina (El Palmar, Murcia, Spain) [moonlight distance 140º]
2017 Nov. 01.01 UT: m1=9.2, Dia.=5.5′, DC=3; 25-cm L (150x); Danil Sidorko (Korenovsk, Russia) [SQM = 20.42]
2017 Oct. 30.96 TU: m1=9.4, Dia.=5′, DC=2; 29×100 B; Maik Mayer (Liumburg, Germany)
2017 Oct. 27.96 UT: m1=8.8, Dia.=8-9′, DC=d2-3; 15×70 binoculars (m1 and d estimates) and 0.40-m Reflector f/4.4 (56x); Gabor Santa (Göd, Hungary) [Drop-like inner coma, contains very inner disk, round outer coma. Very interesting that the sight is identical as in a 10 cm achromat, but its brighter. But the parameters are identical]
2017 Oct. 26.64 UT: m1=9.9, Dia.=5′, DC=1; 40.0-cm L f/4.5 (36x); Seiichi Yoshida (Gunma, Japan)
2017 Oct. 24.94 UT: m1=10.0, Dia.=6′, DC=2; 13-cm L (65x); Alexsandr Morozov (Novozybkov, Russia) (S – Sidgwick`s method, Lm=6.13)
2017 Oct. 22.90 UT: m1=8.3, Dia.=8′, DC=2/; 25×100 B; Juan Jose Gonzalez (Alto del Castro – Aralla, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2017 Oct. 21.02 UT: m1=8.9, Dia=7′, DC=3, no tail; 15-cm T (30x); Carlos Labordena (Castellón, España)
2017 Oct. 21.01 UT: m1=8.7, Dia=7′, DC=2, no tail; 8-cm B (11x); Carlos Labordena (Castellón, España)
2017 Oct. 20.09 UT: m1=9.9, Dia.=5′, DC=2/; 13-cm L (65x); Alexsandr Morozov (Novozybkov, Russia) (Lm=6.14)
2017 Oct. 17.81 TU m1=8.6, dia.=6′, DC=2/; 25×100 B; Martin Lehky (Czech Republic)
2017 Oct. 16.97 UT: m1=8.8, Dia=6′, DC=3, no tail; 20-cm SCT (50x); Carlos Labordena (Castellón, España)
2017 Oct. 16.96 UT: m1=8.5, Dia=7′, DC=2, no tail; 8-cm B (11x); Carlos Labordena (Castellón, España)
2017 Oct. 16.81 TU m1=8.6, dia.=6′, DC=2/; 25×100 B; Martin Lehky (Czech Republic)
2017 Oct. 15.81 TU m1=8.5, dia.=7′, DC=3; 25×100 B; Martin Lehky (Czech Republic)
2017 Oct. 14.00 UT: m1=8.3, Dia.=7′, DC=2/; 25×100 B; Juan Jose Gonzalez (Alto del Castro – Aralla, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [In 20 cm SCT (77x) : m1=8.5, Dia.=7′, DC=3. Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2017 Oct. 13.97 UT: m1=8.6, Dia=6′, DC=2, no tail; 8-cm B (11x); Carlos Labordena (Castellón, España)
2017 Oct. 13.89 UT: m1=8.8, Dia.=7′, DC=d2-3; 0.10-m refractor achromat f/5 (20x, 55x); Gabor Santa (Göd, Hungary) [Round coma vith a drop-like inner structure, central disk]
2017 Oct. 13.81 TU m1=8.6, dia.=7′, DC=2/; 25×100 B; Martin Lehky (Czech Republic)
2017 Oct. 12.81 TU m1=8.7, dia.=6.5′, DC=2/; 25×100 B; Martin Lehky (Czech Republic)
2017 Oct. 10.90 UT: m1=8.3, Dia.=7′, DC=3; 25×100 B; Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1490 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2017 Oct. 03.19 UT: m1=8.1, Dia.=11′, DC=3; 10×50 B; Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1490 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2017 Oct. 03.05 UT: m1=9.4, Dia.=7′, DC=3; 13-cm L (26x); Alexsandr Morozov (Novozybkov, Russia) (S – Sidgwick`s method, Lm=6.45)
2017 Oct. 02.01 UT: m1=9.2, Dia.=9.3′, DC=3/; 25-cm L (70x); Danil Sidorko (Korenovsk, Russia) [SQM= 21.10]
2017 Oct. 01.29 UT: m1=9.5, Dia.=5′, DC=2/; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Sep. 29.96 TU m1=9.3, dia.=5′, DC=3; 25×100 B; Martin Lehky (Czech Republic)
2017 Sep. 27.63 UT: m1=9.5, Dia.=6.7’, DC=3; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Enhances slightly in Swan Band filter. Coma diffuse with semi-transparent outer coma, opaque inner coma. Slight interference from faint stars in coma. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= S; Cat= TK]
2017 Sep. 27.12 TU m1=9.6, dia.=5′, DC=3/; 25×100 B; Martin Lehky (Czech Republic)
2017 Sep. 25.69 UT: m1=9.5, Dia.=8′, DC=2; 40.0-cm L f/4.5 (36x); Seiichi Yoshida (Gunma, Japan)
2017 Sep. 25.01 UT: m1=8.3, Dia.=10′, DC=3; 10×50 B; Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1490 m, 42º 54′ N, 5º 48′ W) [In 25x100B : m1=8.5, Dia.=9′, DC=2/. Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2017 Sep. 21.93 UT: m1=9.4, Dia.=4′, DC=2/; 13-cm L (65x); Alexsandr Morozov (Novozybkov, Russia)(S – Sidgwick`s method, Lm=5.95)
2017 Sep. 21.73 UT: m1=9.5, Dia.=11.4’, DC=3/4; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Outer coma semi-transparent, inner coma opaque and moderately condensed. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Sep. 20.04 UT: m1=9.0, Dia=7′, DC=2, no tail; 20-cm T (64x); Carlos Labordena (Castellón, España)
2017 Sep. 18.95 UT: m1=9.0, Dia.=5′, DC=3; 13-cm L (65x); Alexsandr Morozov (Novozybkov, Russia) (S – Sidgwick`s method)
2017 Sep. 17.09 UT: m1=8.7, Dia=7′, DC=2, no tail; 8-cm B (11x); Carlos Labordena (Castellón, España)
2017 Sep. 17.08 UT: m1=8.9, Dia=7′, DC=3, no tail; 15-cm T (30x); Carlos Labordena (Castellón, España)
2017 Sep. 16.01 UT: m1=8.2, Dia.=9′, DC=3; 10×50 B; Juan Jose Gonzalez (Cruce de Aralla – Embalse de Barrios de Luna, Leon, Spain; Alt. 1110 m, 42º 54′ N, 5º 52′ W) [In 25x100B : m1=8.3, Dia.=9′, DC=2/. Sidgwick method. Tycho-2 comparison stars. SQM: 21.3]
2017 Sep. 15.21 UT: m1=9.3, Dia.=5′, DC=3/; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Sep. 03.002 UT: m1=9.6, Dia.=3.5′, DC=3; 25-cm L (150x); Danil Sidorko (Korenovsk, Russia) [SQM = 21.65]
2017 Sep. 02.15 UT: m1=9.3, Dia=5′, DC=3, no tail; 20-cm SCT (50x); Carlos Labordena (Castellón, España)
2017 Sep. 01.75 UT: m1=10.0, Dia.=6.4’, DC=3/4; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma opaque in centre, gradually fades to edges, pale aqua-blue in colour. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Sep. 01.09 UT: m1=8.6, Dia.=8′, DC=3; 25×100 B; Juan Jose Gonzalez (Alcuetas – Villabraz, Leon, Spain; Alt. 885 m, 42º 16′ N, 5º 27′ W) [In 20 cm SCT (77x) : m1=9.1, Dia.=6′, DC=3/. Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2017 Sep. 01.01 UT: m1=10.0, Dia.=3′, DC=2/; 13-cm L (65x); Alexsandr Morozov (Novozybkov, Russia)
2017 Aug. 30.71 UT: m1=9.9, Dia.=5.8’, DC=4; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Enhances in Swan Band filter, diffuse coma with opaque centre. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Aug. 30.04 UT: m1=9.4, Dia.=5′, DC=3; 25×100 B; Martin Lehky (Hradec Kralove, Czech Republic)
2017 Aug. 29.08 UT: m1=9.5, Dia.=5′, DC=3; 25×100 B; Martin Lehky (Hradec Kralove, Czech Republic)
2017 Aug. 25.62: UT: m1=9.6:; 25×100 B; David A. J. Seargent (Cowra, NSW, Australia) [Somewhat enhanced using Swan Band filter]
2017 Aug. 25.15 UT: m1=8.7, Dia.=8′, DC=3; 25×100 B; Juan Jose Gonzalez (Puerto del Pando – Prioro, Leon, Spain; Alt. 1430 m, 42º 56′ N, 4º 57′ W) [In 20-cm SCT (77x) : m1=9.0, Dia.=6′, DC=3. Sidgwick method. Tycho-2 comparison stars. SQM: 21.4]
2017 Aug. 22.21 UT: m1=9.9, Dia.=4′, DC=4; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Aug. 21.11 UT: m1=8.8, Dia.=7′, DC=3; 25×100 B; Juan Jose Gonzalez (Alto del Castro – Aralla, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [In 20-cm SCT (77x): m1=9.0, Dia.=6′, DC=3/. Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2017 Aug. 19.72 UT: m1=9.5, Dia.=6’, DC=4; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma large and diffuse, opaque centre, moderately condensed. Enhances well in Swan Band filter, pale aqua-blue in colour. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Aug. 19.01 UT: m1=10.7, Dia.=2.5′, DC=s4; 0.60-m L (184x); Gabor Santa (Hungary) [m2=15:, Huge coma with dim nucleus]
2017 Aug. 17.67 UT: m1=9.9, Dia.=5.5’, DC=3/4; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Enhances strongly in Swan Band filter. Inner coma opaque, moderately condensed. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Aug. 17.03 UT: m1=9.1, Dia.=5′, DC=3/; 20-cm SCT (77x); (Alto del Castro – Aralla, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Before moonrise. Altitude: 11 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2017 Aug. 01.74 UT: m1=9.8, Dia.=7.5’, DC=5/6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Enhances in Swan Band filter; Outer coma semi-transparent, inner coma diffuse and opaque with a faint stellar centre visible in good seeing. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Aug. 01.71 UT: m1=9.6, Dia.=10′, DC=2; 25×100 B; David A. J. Seargent (Cowra, NSW, Australia) [Moderately enhanced using Swan Band filter]
2017 Aug. 01.23 UT: m1=10.1, Dia.=4′, DC=3; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Slight enhancement with Swan band filter]
2017 Aug. 01.06 UT: m1=10.3, Dia.=5′, DC=3; 25×100 B; Martin Lehky (Hradec Kralove, Czech Republic)
2017 July 30.12 UT: m1=10.1, Dia=11′, DC=2, no tail; 20-cm SCT (50x); Carlos Labordena (Castellón, España)
2017 July 25.77 UT: m1=9.9, Dia.=9.6’, DC=3; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma large and diffuse, enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= S; Cat= TK]
2017 July 24.75 UT: m1=10.0, Dia.=7’, DC=3; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma large, enhances well in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= S; Cat= TK]
2017 July 23.13 UT: m1=9.8, Dia.=5′, DC=2/; 20-cm SCT (77x); Juan Jose Gonzalez (Alto del Castro – Aralla, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Brighter than expected. Diffuse object with faint outer coma. Field stars checked in DSS. Altitude: 17 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]

C/2017 K6 (Jacques)
2017 Nov. 09.45 UT: m1=14.5, Dia.=0.5’, DC=2/3; 25-cm L f:5 (166x); Chris Wyatt (Walcha, NSW, Australia) [Visible in periods of good seeing. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Nov. 08.45 UT: m1=14.7, Dia.=0.5’, DC=2/3; 25-cm L f:5 (166x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse. Difficult due to proximity to mag 13.1 star. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Oct. 30.72 UT: m1=14.7, Dia.=0.3’, DC=2; 25-cm L f:5 (166x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, visible as a tiny misty patch with a slightly brighter centre in good seeing. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]

C/2017 E4 (Lovejoy) disintegrated
2017 Apr. 24.15 UT: m1=9.4, Dia.=3′, DC=2, Tail= 6′; 20-cm SCT (50x); Carlos Labordena (Castellón, España)
2017 Apr. 23.02 UT: m1=10.6, Dia.=3′, DC=2/; 13-cm L (65x); Alexsandr Morozov (Novozybkov, Russia)
2017 Apr. 21.16 UT: m1=9.2, Dia.=3′, DC=2/, Tail= 0.2 deg. in PA: 320 deg.; 20-cm SCT (100x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m,  42º 54′ N, 5º 48′ W) [No observable central condensation. The comet shows a significant fading and lower DC in comparison with my previous Apr. 7.17 observation. Sidgwick method. Tycho-2 comparison stars. SQM: 21.3 at zenith. Altitude: 12 deg. Mountain  location, very clear sky]
2017 Apr. 18.03 UT: m1=11.0 CCD, Dia.=0.90, DC=7/, Tail=10′ in PA: 316 deg.; 0.25-m f/4.7 reflector + CCD; Serguey Shurpakov (Observatory C36, Baran’, Belarus)
2017 Apr. 08.18 UT: m1=6.9, Dia.=18′, DC=6; 20×80 B; J. P. Navarro Pina / Manuel Hernandez (Puerto Cadena, Murcia, Spain) [Comet very condensed and bright, altitude 400 mts]
2017 Apr. 07.17 UT: m1=7.0, Dia.=6′, DC=7, no tail; 8-cm B(11x); Carlos Labordena (Castellón, España)
2017 Apr. 07.17 UT: m1=7.1, Dia.=5′, DC=7; 10×50 B; Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m,  42º 54′ N, 5º 48′ W) [Morris method. Tycho-2 comparison stars. SQM: 21.0 at zenith. Altitude: 17 deg. In 20 cm SCT(77x): Ion tail 0.6-deg in PA 280 deg.  Mountain  location, very clear sky]
2017 Apr. 05.79 UT: m1=7.4, Dia.=8.4’, DC=6; 7×50 B; Chris Wyatt (Walcha, NSW, Australia) [Interference by twilight; Low altitude = 6.8°. Coma diffuse with stellar centre. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Apr. 05.36 UT: m1=6.5, Dia.=5′, DC=5; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Civil twilight: Sun altitude: -11º / Comet altitude: 16º]
2017 Apr. 05.06 UT: m1=7.0, Dia.=4′, DC=7; 13-cm L (26x); Alexsandr Morozov (Novozybkov, Russia)
2017 Apr. 04.36 UT: m1=6.3, Dia.=6′, DC=5; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Civil twilight / Sun altitude: -11º]
2017 Apr. 04.16 UT: m1=6.9, Dia.=4′, DC=7; 10×50 B; Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m,  42º 54′ N, 5º 48′ W) [Morris method. Tycho-2 comparison stars. SQM: 21.5 at zenith. Altitude: 14 deg. In 20 cm SCT(77x): Ion tail 0.9-deg in PA 270 deg. Mountain  location, very clear sky]
2017 Apr. 03.34 UT: m1=6.5, Dia.=5′, DC=7; 15×70 B; Willian Souza (Sao Paulo, Brazil)
2017 Apr. 03.07 UT: m1=7.2, Dia.=5′, DC=6; 6-cm B (20x); Alexsandr Morozov (Novozybkov, Russia)
2017 Apr. 02.18 UT: m1=8.5, Dia.=8′, DC=6, no tail; 20-cm SCT(50x); Carlos Labordena (Castellón, España)
2017 Apr. 02.17 UT: m1=8.3, Dia.=7′, DC=5, no tail; 8-cm B(11x); Carlos Labordena (Castellón, España)
2017 Apr. 02.09 UT: m1=6.8, Dia.=5.5′, DC=5/; 20×80 B; Marek Biely (Brno, Czech Republic, 244 m.a.s.l.) [Nice, well condensed object with an elongated coma. Low altitude: 11.9 deg. above the horizon. Corrected for an atmospheric extinction by using “average” table.]
2017 Apr. 01.86 UT: m1=7.1, Dia.=7′, DC=6; 10-cm f/4 L (20x); Andrew Pearce (Bailup, W. Australia)
2017 Apr. 01.76 UT: m1=7.3, Dia.=8.3’, DC=6; 7×50 B; Chris Wyatt (Walcha, NSW, Australia) [Coma shows bright inner coma with stellar centre, diffuse outer coma. Enhances well in Swan Band filter. Low altitude= 10.1°. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Apr. 01.17 UT: m1=7.4, Dia.=5′, DC=7; 10×50 B; Juan Jose Gonzalez (Candanedo de Fenar, Leon, Spain; Alt. 1060 m, 42º 49′ N, 5º 34′ W) [Morris method. Tycho-2 comparison stars. SQM: 21.4 at zenith. Altitude: 14 deg. Mountain location, very clear sky]
2017 Mar. 31.87 UT: m1=7.4, Dia.=6.5′, DC=6; 10-cm f/4 L (20x); Andrew Pearce (Bailup, W. Australia)
2017 Mar. 30.34 UT: m1=7.1, Dia.=8′, DC=6; 7×50 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Mar. 30.34 UT: m1=7.2, Dia.=6′, DC=6/, Tail= 0.2º PA: 270 deg.; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Mar. 29.77 UT: m1=7.6, Dia.=3.5’, DC=6; 25×100 B; Michael Mattiazzo (Swan Hill, Vic, Australia)
2017 Mar. 29.34 UT: m1=7.2, Dia.=8′, DC=7; 7×50 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Mar. 29.34 UT: m1=7.3, Dia.=6′, DC=7, Tail= 0.2º PA: 280 deg.; 20 x 100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Mar. 29.18 UT: m1=8.6, Dia.=5′, DC=5, no tail; 8-cm B(11x); Carlos Labordena (Castellón, España)
2017 Mar. 28.18 UT: m1=9.1, Dia.=2.5′, DC=6, no tail; 20-cm SCT(50x); Carlos Labordena (Castellón, España)
2017 Mar. 28.18 UT: m1=7.9, Dia.=5′, DC=6/; 10×50 B; Juan Jose Gonzalez (Collado del Fresno, Asturias, Spain; Alt. 1280 m, 43º 10′ N, 5º 54′ W) [Morris method. Tycho-2 comparison stars. SQM: 21.5 at zenith. Altitude: 14 deg. In 20 cm SCT(77x): m1=8.1. Mountain location, very clear sky]
2017 Mar. 28.14 UT: m1=7.8, Dia.=3.5’, DC=5/; 15.5-cm L (29x); Reinder Bouma (Burlage, Germany)
2017 Mar. 27.77 UT: m1=8.6, Dia.=3’, DC=4; 25×100 B; Michael Mattiazzo (Swan Hill, Vic, Australia)
2017 Mar. 27.73 UT: m1=9.1, Dia.=2.4’, DC=6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma enhances in Swan Band filter, faint stellar central condensation, low altitude = 13.9°. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Mar. 27.11 UT: m1=10.5, Dia.=1.8′, DC=3; 60-cm L (188x); Sandor Szabo (Hungary)
2017 Mar. 25.77 UT: m1=9.0, Dia.=3.5’, DC=4; 25×100 B; Michael Mattiazzo (Swan Hill, Vic, Australia) [brightening rapidly]
2017 Mar. 25.34 UT: m1=9.3, Dia.=5′, DC=4/; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil) [enhanced image with Swan band filter]
2017 Mar. 24.85 UT: m1=9.2, Dia.=5.5′, DC=4; 10-cm f/4 L (20x); Andrew Pearce (Bailup, W. Australia)
2017 Mar. 20.21 UT: m1=8.6, Dia.=4.5′, DC=3; 20-cm SCT (100x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º  48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 20.8 at zenith. Significantly brighter than expected. Wide and diffuse coma. Followed for 40 min. Motion obvious. Some moonlight interference (phase 0.54). Altitude: 13 deg. Limiting star magnitude near comet: 12.5 (APASS). Field stars checked in DSS. Mountain location, very clear sky]

C/2017 E1 (Borisov)  c2017e1_mag
2017 Apr. 30.35 UT: m1=10.9, Dia.=2′, DC=4; 22-cm L (160x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Apr. 28.79 UT: m1=11.0, Dia.=1.3’, DC=4; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Close to bright star, slight interference. Outer coma diffuse with a brighter moderately condensed inner coma. Zodiacal light interference. Low altitude = 17.0°. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Apr. 07.19 UT: m1=7.9, Dia.=6′, DC=2; 20-cm SCT (77x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m,  42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. Altitude: 6 deg. A hint of tail was observable. Astronomical twilight. Mountain location, very clear sky down to the horizon]
2017 Apr. 05.77 UT: m1=10.9, Dia.=3’, DC=5/6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, faint stellar central condensation in good seeing, slight zodiacal light interference. Altitude= 18.1°. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Apr. 04.19 UT: m1=8.5, Dia.=5′, DC=2; 20-cm SCT (100x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m,  42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. Altitude: 6 deg. Astronomical twilight. Mountain location, very clear sky]
2017 Apr. 01.85 UT: m1=11.2, Dia.=2.4′, DC=3; 20-cm f/4 L (45x); Andrew Pearce (Bailup, W. Australia)
2017 Apr. 01.19 UT: m1=8.8, Dia.=4′, DC=2/; 25×100 B; Juan Jose Gonzalez (Candanedo de Fenar, Leon, Spain; Alt. 1060 m, 42º 49′ N, 5º 34′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.4 at zenith. Altitude: 6 deg. Mountain location, very clear sky]
2017 Mar. 31.86 UT: m1=11.0, Dia.=2.2′, DC=3; 20-cm f/4 L (45x); Andrew Pearce (Bailup, W. Australia)
2017 Mar. 29.35 UT: m1=11.4, Dia.=2.5′, DC=4; 22-cm L (160x); Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Nautical twilght]
2017 Mar. 28.20 UT: m1=9.2, Dia.=5′, DC=2; 20-cm SCT (100x); Juan Jose Gonzalez (Collado del Fresno, Asturias, Spain; Alt. 1280 m, 43º 10′ N, 5º  54′ W) [Sidgwick method. Tycho-2 comparison stars. Altitude: 9 deg. Beginning of astronomical twilight. Mountain location, very clear sky]
2017 Mar. 27.74 UT: m1=11.0, Dia.=1.5’, DC=3/4; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma enhances in Swan Band filter; Slight zodiacal light interference. Low altitude = 13.5°. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Mar. 20.20 UT: m1=9.7, Dia.=3′, DC=2; 20-cm SCT (100x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 20.8 at zenith. Altitude: 10 deg. Field stars checked in DSS. Background star of mag 12.4 (GSC) in coma. Some moonlight interference (phase 0.54). Mountain location, very clear sky]
2017 Mar. 09.20 UT: m1=11.2, Dia.=2.5′, DC=2; 20-cm SCT (100x); Juan Jose Gonzalez (Cea, Leon, Spain; Alt. 880 m, 42º 28′ N, 5º  0′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.3 at zenith. Faint and diffuse outer coma. Altitude: 12 deg. Field stars checked in DSS. Rural dark sky location, clear sky]
2017 Mar. 05.49 UT: m1=13.1:, Dia.=1.6’, DC=1-2; 41-cm L (70x); Alan Hale (Cloudcroft, New Mexico, USA) [Vague and diffuse; motion obvious within a few minutes in the rich star field]

C/2016 VZ18 (PANSTARRS) c2016vz18_mag
2017 Mar. 26.81 UT: m1=14.7, Dia.=0.7′, DC=1; 60-cm L (244x); Sandor Szabo (Hungary) [Motion was checked]
2017 Mar. 19.81 UT: m1=11.8, Dia.=2′, DC=2, no tail; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2017 Mar. 15.87 UT: m1=10.8, Dia.=3.5′, DC=2; 20-cm SCT (100x); Juan Jose Gonzalez (Alto del Trichero – Soto y Amío, Leon, Spain; Alt. 1190 m, 42º 46′ N, 5º 53′ W) [Sidgwick method. Tycho-2 comparison stars. Very faint and diffuse outer coma. Nearby field stars checked in DSS. Background star of mag 11.4 (Tycho-2) in coma. Mountain location, very clear sky. SQM: 21.4 at zenith]
2017 Mar. 15.79 UT: m1=13.2:, Dia.=1.2′, DC=3; 33-cm L (114x); Piotr Guzik (Koskowa Góra, Poland; Alt. 810 m, 49º 45′ N, 19º 47′ E) [Rather faint and diffuse. SQM-L: 21.0 at zenith. Sidgwick method, APASS comparison stars]
2017 Mar. 02.15 UT: m1=13.6, Dia.=0.7’, DC=~1; 41-cm L (229x); Alan Hale (Cloudcroft, New Mexico, USA) [Very vague and diffuse]
2017 Mar. 01.83 UT: m1=13.7, Dia.=1.0′, DC=2; 30.5-cm L f:4.9 (150x); J. P. Navarro Pina (Campos del Rio, Murcia, Spain) [comet very diffuse, Lm=5,8]
2017 Mar. 01.79 UT: m1=12.2:, Dia.=2.5′, DC=0-1; 25.4-cm L (171x); Gabor Santa (Göd, county Pest, Hungary) [nelm:6, 36 deg above horizon, SQM=19.7]
2017 Mar. 01.76 UT: m1=13.8, Dia.=1.0’, DC=2; 60-cm L (244x); Sandor Szabo (Hungary) [Immediately seen, very diffuse, motion was checked]
2017 Feb. 25.87 UT: m1=11.3, Dia.=1′, DC=1; 20-cm SCT (80x); Carlos Labordena (Castellfort, Castellon, Spain; Alt. 1000 m, SQM=21.6)
2017 Feb. 24.87 UT: m1=10.7, Dia.=3′, DC=1; 20-cm SCT (77x): Juan Jose Gonzalez (Villasecino, Leon, Spain; Alt. 1220 m, 42º 58′ N, 6º 01’W) [Sidgwick method. Tycho-2 comparison stars. SQM : 21.3 at zenith. Significantly brighter than expected. Very faint and diffuse outer coma. Limiting star magnitude near comet: 14.5 (Henden). Motion checked during a 45-min period. Nearby field stars checked in DSS. Mountain location, very clear sky]
2017 Feb. 24.808 UT: m1=14.2, Dia.=0.5′, DC=3; 30-cm T (139x); Edwin van Dijk (Burlage, Germany); near sea level) [Sidgwick method. APASS comparison stars]
2017 Feb. 24.806 UT: m1=13.6, Dia.=0.8′, DC=3; 30-cm T (139x); Reinder Bouma (Burlage, Germany) [Sidgwick method. APASS comparison stars. Faint, diffuse object with slight condensation. Field checked in DSS. Motion evident after some 10-15 minutes]

C/2016 U1 (NEOWISE)  c2016u1_mag
2017 Jan. 07.27 UT: m1=7.5, Dia.=1.5′, DC=7/; 25×100 B; Juan Jose Gonzalez (Alto del Castro, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [In 20 cm SCT (77x): Tail: 0.1 deg. in PA 310 deg. Morris method. Tycho-2 comparison stars at the same low altitude (8 deg) as the comet. Astronomical twilight. Mountain location, very clear sky]
2017 Jan. 06.19 UT: m1=7.7, Dia.=1.7′, DC=8; 11.4-cm L f:5 (40x); Artyom Novichonok (Lososinnoe, Karelia) [Bright, easy, very condensed comet. Unfortunately, there is cloudy forecast for nearest night and I possibly will not see the comet again. I imaged it without tracking but 0.5 deg tail still visible (don’t visible visually)]
2017 Jan. 05.252 UT: m1=7.6, Dia.=4′, DC=5; 20×80 B; Neil Norman (Ipswich, England)
2017 Jan. 05.25 UT: m1=7.8, Dia.=2′, DC=7, no tail; 8-cm B (11x); Carlos Labordena (Castellón, España)
2017 Jan. 05.18 UT: m1=7.7, Dia.=2.0′, DC=8; 11.4-cm L f:5 (40x); Artyom Novichonok (Konchezero, Karelia) [SQM-L ~ 20.2, Alt. 7.5 deg, astronomical twilight, -28 С. Very small and condensed comet]
2017 Ene. 03.24 UT: m1=8.2, Dia=4′, DC=6, no cola; 8-cm B (11x); Carlos Labordena (Castellón, España)
2017 Jan. 03.18 UT: m1=7.9, Dia.=1.9′, DC=7; 20.0-cm L f:5 (80x); Artyom Novichonok (Konchezero, Karelia) [SQM-L ~ 20.6, Alt. 8 deg. Very small and condensed comet]
2017 Jan. 01.26 UT: m1=8.1, Dia.=3′, DC=7; 10×50 B; Juan Jose Gonzalez (Puerto de las Señales, Leon, Spain; Alt. 1610 m, 43º 05′ N, 5º 14′ W) [Morris method. Tycho-2 comparison stars. SQM: 21.7 at zenith. Altitude: 13 deg. Mountain location, very clear sky]
2017 Ene. 01.24 UT: m1=8.7, Dia=5′, DC=5, no cola; 8-cm B (11x); Carlos Labordena (Castellón, España)
2016 Dec. 31.20 UT: m1=8.3, Dia.=4.0′, DC=5; 20×80 B; Marek Biely (Brno, 244 m.a.s.l., Czech Republic) [Freezing conditions (temp.: ~ -9 °C). Low altitude: 12.2 deg. above the horizon. Correction for an atmospheric extinction not needed.]
2016 Dec. 31.19 UT: m1=8.6, Dia.=3′; 25×100 B; Mieczyslaw Leszek Paradowski (Lublin, Poland) [Comet alt. 13 deg]
2016 Dec. 30.22 UT: m1=8.0, Dia.=&4, DC=8; 20-cm L (42x); Alex Scholten (Eerbeek, Netherlands)
2016 Dec. 30.22 UT: m1=8.1, Dia.=2.3′, DC=d6; 32-cm L f/5 (45x); Uwe Pilz (Leipzig, Germany)
2016 Dec. 30.20 UT: m1=8.4, Dia.=3.5′, DC=5; 20×80 B; Marek Biely (Brno, 244 m.a.s.l., Czech Republic) [Freezing conditions (temp.: ~ -7 °C). Low altitude: 13.2 deg. above the horizon. Correction for an atmospheric extinction not needed.]
2016 Dec. 30.19 UT: m1=8.2, Dia.=2’, DC=8; 20×90 B; Sandor Szabo (Hungary)
2016 Dec. 30.19 UT: m1=8.0, Dia.=3’, DC=6; 60-cm L (77x); Sandor Szabo (Hungary)
2016 Dec. 29.20 UT: m1=8.2, Dia.=4.1′, DC=6/; 20×80 B; Marek Biely (Brno, 244 m.a.s.l., Czech Republic) [An observation made after almost 7 months long observing blank. Comet bright and well condensed. Low altitude: 15.9 deg. above the horizon. Correction for an atmospheric extinction not needed]
2016 Dec. 29.20 UT: m1=8.4, Dia.=4.5′, DC=6; 35-cm L (62x); Jakub Cerny (Senohraby, Czech Republic)
2016 Dec. 29.19 UT: m1=7,8, Dia.=7’, m2=8.3 (strong disc-like condensation), Dia.=3,5′, DC=D6; 15×70 B; Gabor Santa (Göd, Pest county, Hungary) [Good suburbian location. Disc-like, strongly condensed inner coma in a large, very-very faint outer coma. Inner part is slightly excentric to East. Nelm at the comet: 4m]
2016 Dec. 26.26 UT: m1=8.3, Dia.=5′, DC=5/; 10×50 B; Juan José González (Les Retuertes – Sierra del Aramo, alt. 1350 m, Asturias, España; Alt. 1350 m, 43º 10′ N, 5º 54′ W) [Método Morris. Estrellas de comparación Tycho-2. Crepúsculo astronómico. Altura sobre el horizonte: 23º. Cielo muy claro de montaña]
2016 Dic. 23.21 UT: m1=10.2, Dia=6′, DC=4, no cola; 20-cm SCT (50x); Carlos Labordena (Castellón, España)
2016 Dic. 23.21 UT: m1=10.0, Dia=6′, DC=3, no cola; 8-cm B (11x); Carlos Labordena (Castellón, España)
2016 Dec. 23.18 UT: m1=8.9, Dia.=4′, DC=4; 33-cm L (67x); Piotr Guzik (Biórków Mały, Poland; Alt. 265 m, 50º 09′ N, 20º 11′ E) [Morris method used. Bright, moderately condensed, round object. SQM: 20.5 at zenith]
2016 Dec. 23.18 UT: m1=8.5, Dia.=6′, DC=4; 10×50 B; Piotr Guzik (Biórków Mały, Poland; Alt. 265 m, 50º 09′ N, 20º 11′ E) [Morris method used. Bright, moderately condensed, round object. Pretty faint (though still obvious) in 10×50 binoculars. SQM: 20.5 at zenith]
2016 Dec. 12.17 UT: m1=10.2, Dia.=3.5′, DC=2; 20.0-cm L f:5 (80x); Artyom Novichonok (Konchezero, Karelia) [SQM-L ~ 20.8 near Konchezero]
2016 Dec. 11.50 UT: m1=9.8, Dia.=5′; 30×125 B; Carl Hergenrother (Tucson, AZ, USA)
2016 Dec. 11.05 UT: m1=12.6 CCD, Dia.=1.55′, DC=2/; 0.25-m L f/4.7; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Dec. 10.49 UT: m1=10.0, Dia.=4′; 30×125 B; Carl Hergenrother (Tucson, AZ, USA)
2016 Dec. 10.22 UT: m1=9.7, Dia.=6′, DC=3; 25×100 B; Juan José González (Les Retuertes – Sierra del Aramo, alt. 1350 m, Asturias, España) [En 20 cm SCT (77x): m1=9.9; Cielo muy claro de montaña]
2016 Dec. 09.51 UT: m1=10.3, Dia.=3′; 30×125 B; Carl Hergenrother (Tucson, AZ, USA)
2016 Dec. 08.50 UT: m1=10.3, Dia.=3′; 30×125 B; Carl Hergenrother (Tucson, AZ, USA)
2016 Dec. 06.67 UT: m1=10.6, Dia.=4.5′, DC=1/; 20.0-cm L f:5 (80x); Artyom Novichonok (Konchezero, Karelia) [SQM-L ~20.7 near Konchezero]
2016 Dec. 06.20 UT: m1=10.2, Dia.=6′, DC=2; 25×100 B; Juan José González (Les Retuertes – Sierra del Aramo, alt. 1350 m, Asturias, España) [Cielo muy claro de montaña]
2016 Dec. 06.02 UT: m1=11.0, Dia.=4′, DC=1; 20.0-cm L f:5 (80x); Artyom Novichonok (Konchezero, Karelia) [SQM-L ~ 20.3 Konchezero]
2016 Dec. 05.24 UT: m1=10.3, Dia.=6′, DC=2; 20-cm SCT (77x); Juan José González (Pico del Pozo de la Nieve – Sierra de la Bobia, alt. 1130 m, Asturias, España)
2016 Dec. 05.17 UT: m1=10.4, Dia.=4, DC=1/; 25.4-cm L f:5 (64x); Maik Meyer (Limburg, Germany) [comet enhanced using a Lumicon Swan Band Filter, motion noticeable within 10 minutes]
2016 Dec. 04.49 UT: m1=10.5, Dia.=3’, DC=1; 30×125 B; Carl Hergenrother (Tucson, AZ, USA)
2016 Dic. 03.13 UT: m1=11.5, Dia=3′, DC=1, no cola; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2016 Dec. 02.79 UT: m1=13.1, Dia.=1.5′, DC=1; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)

C/2016 R2 (PANSTARRS)
2017 Nov. 22.92 UT: m1=11.9, Dia.=1.2′, DC=5; 60-cm L (244x); Sandor Szabo (Hungary)
2017 Nov. 16.18 UT: m1=11.7, Dia.=1.3′, DC=3/; 20-cm SCT (133x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. APASS comparison stars. SQM: 20.9]
2017 Nov. 14.89 UT: m1=13.4, Dia.=0.4′, DC=5; 60-cm L (244x); Sandor Szabo (Hungary)
2017 Nov. 14.19 UT: m1=11.8, Dia.=1.3′, DC=3; 20-cm SCT (133x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1490 m, 42º 54′ N, 5º 48′ W) [Field stars checked in DSS. Sidgwick method. APASS comparison stars. SQM: 21.0]
2017 Nov. 14.14 UT: m1=12.8, Dia.=1′, DC=3; 22-cm L (160x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Nov. 09.49 UT: m1=12.9, Dia.=1’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Difficult due to glare from bright star at edge of field. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Oct. 30.69 UT: m1=12.8, Dia.=2’, DC=2/3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, interference from mag 12.8 star in coma; Slight brightening to centre, does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Oct. 27.99 UT: m1=13.5, Dia.=0.7′, DC=1-2; 0.40-m Dobsonian f/4.4 (200x); Gabor Santa (Göd, Hungary) [Diffuse. Close (6′) to Berkeley 20 open clulster which was brighter and bigger]
2017 Oct. 26.68 UT: m1=13.2, Dia.=0.7′, DC=3/; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2017 Oct. 03.20 UT: m1=13.2, Dia.=1.1′, DC=3; 20-cm SCT (133x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [Field stars checked in DSS. Sidgwick method. APASS comparison stars. SQM: 21.0]
2017 Sep. 27.61 UT: m1=13.9, Dia.=0.6’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, small. Visible in periods of good seeing. Slight haze from dust and bushfire smoke. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Sep. 25.73 UT: m1=14.0, Dia.=0.6′, DC=3; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2017 Sep. 21.75 UT: m1=13.8, Dia.=0.9’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Outer coma diffuse, slight brightening to centre. Does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]

C/2016 N6 (PANSTARRS)
2017 Nov. 16.23 UT: m1=13.5, Dia.=0.5′, DC=4; 20-cm SCT (206x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [Field stars checked in DSS. Sidgwick method. APASS comparison stars. SQM: 21.1]
2017 Nov. 14.77 UT: m1=[14.5; 60-cm L (187x); Sandor Szabo (Hungary) [Very close to two 12.7 mag stars, something is there, but NEGATIVE]
2017 Nov. 14.71 UT: m1=14.3, Dia.=0.4′, DC=3-4; 0.40-m L f/4.4 (360x); Gabor Santa (Göd, Hungary) [comet was seen well, round, with some condensation. 27 deg above horizon, nelm=4.5-5.0]
2017 Sep. 22.80 UT: m1=13.7, Dia.=0.7’, DC=3; 60-cm reflector (244x); Sandor Szabo (Sopron, Hungary)
2017 Aug. 18.99 UT: m1=15.0; Dia.=0.35′, DC=0/; 0,60-m L (305x); Gabor Santa (Hungary) Checked on a photo taken on the same night and same location by Ákos Nagy Mélykuti.
2017 Apr. 04.95 UT: m1=17.3 CCD, Dia.=0.33′, DC=8/; 0.25-m f/4.7 reflector + CCD; Serguey Shurpakov (Observatory C36, Baran’, Belarus)
2017 Mar. 17.01 UT: m1=17.4 CCD, Dia.=0.28′, DC=8; 0.25-m f/4.7 reflector + CCD; S. Shurpakov (Observatory C36, Baran’, Belarus)

C/2016 N4 (MASTER) C2016N4_Mag
2017 Nov. 14.80 UT: m1=15.5; 60-cm L (187x); Sandor Szabo (Hungary) [tried to see for half and hour, but NEGATIVE, must be fainter than 15.5 mag]
2017 Nov. 14.73 UT: m1=14.8, Dia.=0.35′ (20″), DC=0-1; 0.40-m L f/4.4 (360x); Gabor Santa (Göd, Hungary) [comet is very dim but obvious, round, without condensation. 64 deg above horizon, nelm=5.6]
2017 Oct. 26.65 UT: m1=14.5, Dia.=0.3′, DC=4; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2017 Oct. 13.88 UT: m1=13.7, Dia.=0.5′, DC=4; 20-cm SCT (206x); Juan Jose Gonzalez (Alto del Castro – Aralla, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Field stars checked in DSS. Sidgwick method. APASS comparison stars. SQM: 21.1]
2017 Oct. 13.79 UT: m1=14.6, Dia.=0.4-0.5′, DC=3-4; 0.40-m Dobsonian f/4.4 (257x); Gabor Santa (Göd, Hungary) [relatively big and diffuse, difficult to see]
2017 Sep. 25.71 UT: m1=14.6, Dia.=0.3′, DC=3; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2017 Sep. 22.84 UT: m1=15.7, Dia.=0.4’, DC=2; 60-cm reflector (305x); Sandor Szabo (Sopron, Hungary) [A 16.5 mag starlike nucleus is seen. Motion was checked during 20 minutes]
2017 Aug. 21.94 UT: m1=14.8, Dia.=0.4′, DC=0; 0.35-m L (351x); Gabor Santa (Hungary) [Bit difficult to see, but I’m sure its real. Movig was detected in a half an hour period. 15,4 mag stars were visible. In this night I got a clear view about NGC 7009 (Saturn nebula) with its lobes, and also about Campbell’s Hydrogen Star, which had really, very-very red colour!]
2017 July 30.93 UT: m1=16.3 CCD, Dia.=0.22′, DC=8; 25-cm reflector f/4.7; Sergey Shurpakov (Baran’, Belarus)
2016 Oct. 31.78 UT: m1=15.8, Dia.=0.25′, DC=4: 60-cm L (305x); Sandor Szabo (Sopron, Hungary)
2016 Sep. 01.01 UT: m1=15.3, Dia.=0.25′, DC=5; 60-cm L (407x); Sandor Szabo (Hungary)
2016 Aug. 27.01 UT: m1=16.5 CCD, Dia.=0.40′, DC=7/; 20-cm L f/4 + CCD; Sergey Shurpakov (A98, Baran’, Belarus)

C/2016 M1 (PANSTARRS)
2017 Nov. 14.75 UT: m1=14.0, Dia.=0.5′, DC=3; 60-cm L (244x); Sandor Szabo (Hungary) [Very close to a 13.9 mag star, but easily seen]
2017 Nov. 14.70 UT: m1=13.7, Dia.=0.6′, DC=d4-5; 0.40-m L f/4.4 (360x); Gabor Santa (Göd, Hungary) [comet is easy to see, round, with disk-like condensation. 32 deg above horizon, nelm=5.0]
2017 Oct. 26.40 UT: m1=[13.9; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2017 Oct. 13.77 UT: m1=14.0, Dia.=0.5′, DC=3-4; 0.40-m Dobsonian f/4.4 (257x); Gabor Santa (relatively big and diffuse, difficult to see Hungary) [easy to see]
2017 Sep. 22.82 UT: m1=14.5, Dia.=0.5’, DC=5; 60-cm reflector (305x); Sandor Szabo (Sopron, Hungary)
2017 Aug. 21.83 UT: m1=14.8, Dia.=0.33′, DC=0; 0.35-m L (351x); Gabor Santa (Hungary) [Coma is diffuse but very obvious]
2017 Apr. 20.00 UT: m1=16.7 CCD, Dia.=0.20′, DC=7/; 0.25-m f/4.7 reflector + CCD; Sergey Shurpakov (Observatory C36, Baran’, Belarus)
2017 Apr. 04.99 UT: m1=16.8 CCD, Dia.=0.37′, DC=7/; 0.25-m f/4.7 reflector + CCD; Serguey Shurpakov (Observatory C36, Baran’, Belarus)
2017 Mar. 16.99 UT: m1=16.8 CCD, Dia.=0.28′, DC=8; 0.25-m f/4.7 reflector + CCD; S. Shurpakov (Observatory C36, Baran’, Belarus)
2017 Mar. 13.99 UT: m1=16.8 CCD, Dia.=0.37′, DC=8/; 0.25-m f/4.7 reflector + CCD; S. Shurpakov (Observatory C36, Baran’, Belarus)

C/2016 K1 (LINEAR) C2016K1_Mag
2016 Aug. 09.91 UT: m1=18.3 CCD, Dia.=0.11′, DC=8; 0.25-m L f/4.7 + CC; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Aug. 07.84 UT: m1=18.0 CCD, Dia.=0.28′, DC=8; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Aug. 03.82 UT: m1=18.0 CCD, Dia.=0.23′, DC=8, Tail=0.40′ in PA: 188 deg.; 0.25-m L  f/3.2 + CCD; Sergey Shurpakov (Baran’, Belarus)
2016 July 30.98 UT: m1=17.3 CCD, Dia.=0.27′, DC=8/; 0.25-m L  f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 July 31.87 UT: m1=17.3 CCD, Dia.=0.30′, DC=7/; 0.25-m L  f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)

P/2016 BA14 (PANSTARRS) P2016BA14_Mag
2016 Apr. 30.96 UT: m1=19.1 CCD, Dia.=0.15′, DC=9; 0.25-m L+CCD; Sergey Shurpakov (Baran’, Belarus)
2016 Apr.29.83 UT: m1=19.1 CCD, Dia.=0.14′, DC=8/; 0.25-m L+CCD; Sergey Shurpakov (Baran’, Belarus)
2016 Mar. 27.92 UT: m1=[13.5, no detectado; 30-cm L(150x); Valentín Diaz (Aspe, Alicante, España)
2016 Mar. 24.76 UT: m1=13.9, Dia.=-, DC=9; 60.3-cm L (244x); Sandor Szabo (Sopron, Hungary)
2016 Mar. 22.47 UT: m1=12.8, Dia.=-‘, DC=9; 40.6-cm L f/4 (260x); Paul Camilleri (Warners Bay, Australia)
2016 Mar. 22.44 UT: m1=13.0, Dia.=-, DC=-; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Ibaraki, Japan)
2016 Mar. 20.81 UT: m1=13.5 DSLR, Dia.=1’; 1100d+300mm lens; Giuseppe Pappa (Sicily, Italy)

C/2016 B1 (NEOWISE)  
2017 June 17.96 UT: m1=17.9 CCC, Dia.=0.26′, DC=7/; 25-cm reflector f/4.7; Sergey Shurpakov (Baran’, Belarus)
2017 May  21.99 UT: m1=17.6 CCD, Dia.=0.26′, DC=8; 25-cm reflector f/4.7 + CCD; Sergey Shurpakov (Baran’, Belarus)

C/2016 A8 (LINEAR) C2016A8_Mag
2016 Oct. 31.73 UT: m1=[15.5, Negative; 60-cm L (305x); Sandor Szabo (Sopron, Hungary) [it is between 15 mag stars, nothing is seen]
2016 Oct. 02.85 UT: m1=12.7, Dia.=0.7′, DC=4; 20-cm SCT (133x); Juan José González (Alto del Castro, alt. 1720 m, León, España) [Estrellas de comparación de la fotometría APASS cercana al cometa. Estrellas de campo comprobadas en el DSS. Cielo muy claro de montaña]
2016 Sep. 29.80 UT: m1=13.8, Dia.=0.4’, DC=1; 60-cm L (305x); Sandor Szabo (Sopron, Hungary)
2016 Sep. 28.87 UT: m1=12.5, Dia.=0.7′, DC=5; 20-cm SCT (133x); Juan José González (Alto del Castro, alt. 1720 m, León, España) [Estrellas de comparación de la fotometría APASS cercana al cometa. Estrellas de campo comprobadas en el DSS. Cielo muy claro de montaña]
2016 Sep. 28.41 UT: m1=13.8, Dia.=0.6’, DC=3; 25-cm L f:5 (166x); Chris Wyatt (Walcha, NSW, Australia) [Very difficult to see, visible in periods of good seeing, no tail. Close to background stars. Sky conditions slightly hazy from smoke]
2016 Sep. 27.78 UT: m1=12.6, Dia.=0.8′, DC=3/; 25.4-cm L f:5 (139x); Maik Meyer (Limburg, Germany)
2016 Sep. 24.00 UT: m1=12.4, Dia.=1′, DC=4; 22-cm L (160x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 Sep. 11.95 UT: m1=14.9 CCD, Dia.=0.56′, DC=6/; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Sep. 06.08 UT: m1=11.8, Dia.=2.0′, DC=3/; 20-cm SCT (100x); Juan José González (Nogarejas, alt. 920 m, León, España)
2016 Sep. 02.96 UT: m1=12.7, Dia.=1.1′, DC=4; 16-cm R f:11 (74x); Martin Lehky (Czech Republic)
2016 Sep. 02.88 UT: m1=11.8, Dia.=2′, DC=4, no cola; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2016 Sep. 01.46 UT: m1=12.6, Dia.=0.3′, DC=6; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)
2016 Aug. 31.94 UT: m1=12.1 DSLR, Dia.=0.68′; 15-cm L + DSLR V f/5; Mieczyslaw Leszek Paradowski (Lublin, Poland) [Software: IRIS v.5.59 – selected green channel; 30 frames stacked]
2016 Aug. 31.91 UT: m1=12.7, Dia.=1′, DC=3/; 16-cm R f:11 (74x); Martin Lehky (Czech Republic)
2016 Aug. 31.82 UT: m1=13.5 CCD, Dia.=0.70′, DC=7/, Tail=0.87′ in PA: 121 deg.; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Aug. 30.88 UT: m1=13.3, Dia.=1.1′, DC=5; 35-cm L (178x); Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 29.94 UT: m1=13.2, Dia.=1.0′, DC=5; 35-cm L (178x); Jakub Černý (Senohraby, Czech Republic)
2016 Ago. 29.92 UT: m1=11.6, Dia.=2.5′, DC=4; 20-cm SCT (77x); Juan José González (Pandorado, alt. 1190 m, León, España)
2016 Aug. 28.94 UT: m1=12.7, Dia.=0.74′, DC=5; 30-cm L f/5 (167x); Mieczyslaw Leszek Paradowski (Dąbrowa, Poland)
2016 Aug. 28.93 UT: m1=13.5, Dia.=1.1′, DC=5/; 35-cm L (178x); Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 27.99 UT: m1=11.9, Dia.=1.5′, DC=4/; 22-cm L (160x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 Aug. 27.92 UT: m1=13.1, Dia.=0.5′, DC=6; 35-cm L (178x); Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 27.89 UT: m1=12.7, Dia.=0.74′, DC=5; 30-cm L f/5 (167x); Mieczyslaw Leszek Paradowski (Dąbrowa, Poland)
2016 Aug. 26.94 UT: m1=13.7 CCD, Dia.=0.50′, DC=7/; 0.20-m L  f/4 + CCD; Sergey Shurpakov (A98, Baran’, Belarus)
2016 Aug. 26.92 UT: m1=13.0, Dia.=0.63′, DC=5; 30-cm L f/5 (167x); Mieczyslaw Leszek Paradowski (Dąbrowa, Poland)
2016 Aug. 26.92 UT: m1=13.1, Dia.=1.0′, DC=6/; 35-cm L (178x); Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 25.92 UT: m1=13.3, Dia.=0.4′, DC=6; 60-cm L (244x); Sandor Szabo (Hungary)
2016 Aug. 25.88 UT: m1=13.1, Dia.=0.7′, DC=6/; 35-cm L (178x); Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 22.92 UT: m1=14.2 CCD, Dia.=0.45′, DC=7/; 0.20-m L f/4 + CCD; Sergey Shurpakov (A98, Baran’, Belarus)
2016 Aug. 21.83 UT: m1=14.0 CCD, Dia.=0.42′, DC=7/; 0.25-m L f/4/7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Aug. 20.87 UT: m1=14.6 CCD, Dia.=0.46′, DC=8; 0.20-m L f/4 + CCD; Sergey Shurpakov (A98, Baran’, Belarus)
2016 Aug. 13.93 UT: m1=13.7 CCD, Dia.=0.47′, DC=6/, Tail=1′ in PA=177 deg.; 25-cm L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Aug. 12.84 UT: m1=13.7 CCD, Dia.=0.49′, DC=7/, Tail=1,15′ in PA=204 deg.; 25-cm L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Ago. 11.09 UT: m1=13.2, Dia.=0.8′, DC=6; 20-cm SCT (133x); Juan José González (Alto del Trichero, alt. 1190 m, León, España) [Movimiento seguido durante 30 min. Estrellas de comparación de la fotometría APASS cercana al cometa. Estrellas de campo comprobadas en el DSS. Cielo muy claro de montaña]
2016 Aug. 07.92 UT: m1=14.0 CCD, Dia.=0.39′, DC=7/; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Aug. 03.97 UT: m1=14.0 CCD, Dia.=0.40′, DC=8, Tail=0.50′ in PA: 219 deg.; 0.25-m L  f/4.7 + CCD; Sergey Shurpakov (Baran’, Belarus)

C/2016 A1 (PANSTARRS)  c2016a1_mag
2017 Mar. 26.85 UT: m1=16.2, Dia.=0.2′, DC=5; 60-cm L (407x); Sandor Szabo (Hungary) [Motion was checked]
2017 Feb. 25.88 UT: m1=16.7 CCD, Dia.=0.29′, DC=8/; 0.25-m f/4.7 reflector + CCD; S. Shurpakov (Observatory C36, Baran’, Belarus)

C/2015Y1 (LINEAR) C2015Y1_Mag
2016 Apr. 28.84 UT: m1=16.9 CCD, Dia.=0.42′, DC=3; 15-cm L+CCD; Sergey Shurpakov (Baran’, Belarus)

C/2015 X8 (NEOWISE) C2015X8_Mag-30
2016 Jan. 29.78 UT: m1=[15.5, NEGATIVE; 60.3-cm L (305x) ; Sandor Szabo (Sieggraben, Austria)
2016 Jan. 26.83 UT: m1=13.0 DSLR, Dia.=1′; 1100d+300mm lens; Giuseppe Pappa (Sicily, Italy)
2016 Jan. 25.88 UT: m1=13.0 DSLR, Dia.=1′; 1100d+300mm lens; Giuseppe Pappa (Sicily, Italy)
2016 Jan. 09.82 UT: m1=12.7, Dia.=1.3′, DC=0; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Ibaraki, Japan)
2015 Dec. 30.85 UT: m1=13.3, Dia.=1.0′, DC=1; 32-cm L f/5 (144x); Uwe Pilz (Leipzig, Germany)
2015 Dec. 21.25 UT: m1=11.2, Dia.=4′, DC=1/; 20-cm SCT (77x); Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España) [Más brillante que lo previsto. Coma amplia y difusa. Movimiento seguido durante 80 minutos. Estrellas de campo comprobadas en el DSS. Cielo muy claro de montaña]

C/2015 X7 (ATLAS) c2015x7_mag
2016 Dec. 11.12 UT: m1=17.9 CCD, Dia.=0.37′, DC=8; 0.25-m L f/4.7; Sergey Shurpakov (C36, Baran’, Belarus)

C/2015 X4 (Elenin) C2015X4_Mag
2016 Jan. 29.87 UT: m1=16.0, Dia.=0.15′, DC=3; 60.3-cm L (305x); Sandor Szabo (Sieggraben, Austria)

C/2015 XY1 (Lemmon) c2015xy1_mag
2017 Jan. 25.82 UT: m1=17.6 CCD, Dia.=0.30′, DC=8/; 0.25-m f/4.7 reflector + CCD; Sergei Shurpakov (C36, Baran’, Belarus)
2017 Jan. 18.89 UT: m1=17.9 CCD, Dia.=0.26′, DC=9; 0.25-m f/4.7 reflector + CCD; Sergei Shurpakov (C36, Baran’, Belarus)

C/2015 WZ (PANSTARRS) C2015WZ_Mag
2016 June 08.87 UT: m1=[11.4; 13-cm L (103x); Alexsandr Morozov (Novozybkov, Russia)
2016 June 07.99 UT: m1=12.3, Dia.=1.4′, DC=3; 31-cm C f/9 (68x); Martin Lehky (Hradec Kralove, Czech Republic)
2016 June 06.99 UT: m1=12.3, Dia.=1.5′, DC=3; 31-cm C f/9 (68x); Martin Lehky (Hradec Kralove, Czech Republic)
2016 June 05.83 UT: m1=10.5, Dia.=3′, DC=2; 25.5-cm L (120x); Danil Sidorko (Korenovsk, Russia)
2016 June 05.07 UT: m1=10.6, Dia.=3′, DC=1, no cola; 20-cm SCT (50x); Carlos Labordena (Castellón, España)
2016 June 03.58 UT: m1=[12.4; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)
2016 May  31.93 UT: m1=10.1, Dia.=5′, DC=1/; 20-cm SCT (77x); Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España)
2016 May  30.01 UT: m1=11.2, Dia.=3′, DC=1, no cola; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2016 May  28.00 UT: m1=16.5 CCD, Dia.=0.31′, DC=3/; 25-cm L f/4.7; Sergey Shurpakov (Baran’, Belarus)
2016 Mayo 15.11 UT: m1=10.4, Dia.=5′, DC=1/; 20-cm SCT (77x); Juan José González (Cueto Rosales, alt. 1420 m, León, España)
2016 May  08.99 UT: m1=14.6 CCD, Dia.=0.49′, DC=3; 0.20-m L+CCD;  Sergey Shurpakov, Baran’, Belarus, A98)
2016 May  08.03 UT: m1=11.5, Dia.=2′.9, DC=2/; 35-cm L (178x); Jakub Cerny (Senohraby, Czech Republic)
2016 May  02.16 UT: m1=13.6, Dia.=0.8′, DC=1; 40-cm T (225x); Sandor Szabo (Hakos, Namibia)
2016 Mayo 01.12 UT: m1=10.9, Dia.=3.0′, DC=2/; 20-cm SCT (100x); Juan José González (Cueto Rosales, alt. 1420 m, León, España) [Significativamente más brillante que lo previsto. Débil y difusa coma externa. Alguna interferencia lunar. Magnitud límite estelar en el sector del cometa: 13.6 (APASS). Movimiento seguido durante 45 min. Estrellas de campo comprobadas en el DSS. Cielo muy claro de montaña]

C/2015 VL62 (Lemmon-Yeung-PANSTARRS) C2015VL62_Mag
2017 Sep. 25.50 UT: m1=[13.7; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2017 Sep. 13.81 UT: m1=15.8 CCD, Dia.=0.20′, DC=7; 25-cm reflector f/4.7; Sergey Shurpakov (Baran’, Belarus)
2017 Aug. 30.70 UT: m1=13.6, Dia.=0.9’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, low altitude= 17.7°. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Aug. 26.88 UT: m1=15.2 CCD, Dia.=0.26′, DC=8; 25-cm reflector f/4.7; Sergey Shurpakov (Baran’, Belarus)
2017 Aug. 23.44 UT: m1=13.7, Dia.=0.7’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Aug. 22.14 UT: m1=12.9, Dia.=2′, DC=3; 22-cm L (160x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Aug. 21.92 UT: m1=14.2, Dia.=0.5′, DC=1/; 0.35-m L (351x); Gabor Santa (Hungary) [Slightly difficult to see, but its OK. Moving was detected in a 20-min period.]
2017 Aug. 20.89 UT: m1=15.0 CCD, Dia.=0.22′, DC=7/; 25-cm reflector f/4.7; Sergey Shurpakov (Baran’, Belarus)
2017 Aug. 19.46 UT: m1=13.7, Dia.=1’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Aug. 17.68 UT: m1=13.7, Dia.=0.8’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Aug. 16.94 UT: m1=12.3, Dia.=1.5′, DC=3/; 20-cm SCT (133x); Juan Jose Gonzalez (Alto del Castro – Aralla, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Motion checked over a 20-min period. Field stars checked in DSS. Sidgwick method. APASS comparison stars. SQM: 21.2]
2017 Aug. 14.97 UT: m1=14.7 CCD, Dia.=0.51′, DC=7/, Tail=2.8′ in PA=73 deg.; 25-cm reflector f/4.7; Sergey Shurpakov (Baran’, Belarus)
2017 Aug. 14.47 UT: m1=13.6, Dia.=1’; DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma small and diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Aug. 09.96 UT: m1=14.5 CCD, Dia.=0.33′, DC=6/, Tail=0.30′ in PA=90 deg.; 25-cm reflector f/4.7; Sergey Shurpakov (Baran’, Belarus)
2017 Aug. 01.74 UT: m1=13.8, Dia.=0.8’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, small central condensation. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 July 30.97 UT: m1=14.9 CCD, Dia.=0.26′, DC=7/; 25-cm reflector f/4.7; Sergey Shurpakov (Baran’, Belarus)
2017 July 26.97 UT: m1=14.9 CCD, Dia.=0.33′, DC=7/; 0.25-m Newton f/4.7; Sergey Shurpakov (Baran’,Belarus)
2017 July 25.76 UT: m1=13.6, Dia.=0.9’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 July 24.73 UT: m1=14.2, Dia.=0.6’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma small and diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 July 22.91 UT: m1=15.2 CCD, Dia.=0.22′, DC=7/; 0.25-m Newton f/4.7; Sergey Shurpakov (Baran’,Belarus)
2017 July 05.78 UT: m1=14.7, Dia.=0.3’, DC=2/3; 25-cm L f:5 (166x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 June 30.66 UT: m1=14.6, Dia.=0.5’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma small and diffuse. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2016 Oct. 31.88 UT: m1=15.7, Dia.=0.15′, DC=6; 60-cm L (305x); Sandor Szabo (Sopron, Hungary)
2016 Sep. 30.92 UT: m1=15.8, Dia.=0.15’, DC=2; 60-cm L (407x); Sandor Szabo (Sopron, Hungary) [It was also observed on the previous night and motion is checked. In ther center there is a 16.2 mag starlike nucleus]
2016 Sep. 08.88 UT: m1=16.6 CCD, Dia.=0.18′, DC=7/; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Sep. 05.94 UT: m1=15.8 CCD, Dia.=0.25′, DC=8; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Aug. 31.88 UT: m1=16.8 CCD, Dia.=0.26′, DC=7/; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Aug. 22.00 UT: m1=16.5 CCD, Dia.=0.20′, DC=7/; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Aug. 13.95 UT: m1=17.3 CCD, Dia.=0.23′, DC=9; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Aug. 13.01 UT: m1=17.3 CCD, Dia.=0.10′, DC=8/; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Aug. 07.97 UT: m1=17.3 CCD, Dia.=0.26′, DC=9; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Aug. 06.98 UT: m1=17.3 CCD, Dia.=0.21′, DC=8/; 0.25-m L  f/4.7 + CCD; Sergey Shurpakov (Baran’, Belarus)

C/2015 V3 (PANSTARRS) C2015V3_Mag
2016 Aug. 12.91 UT: m1=19.4 CCD, Dia.=0.22′, DC=6/; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)

C/2015 V2 (Johnson) C2015V2_Mag
2017 Nov. 09.46 UT: m1=12.4, Dia.=1.1’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, close to stars. Does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Oct. 19.45 UT: m1=12.2, Dia.=1.7’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre but very weak. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Oct. 12.40 UT: m1=12.3, Dia.=1.7’, DC=4; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma does not enhance in Swan Band filter. Coma small with a moderately condensed and opaque centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Sep. 22.47 UT: m1=10.9, Dia.=3.9’, DC=2; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight interference by background star in coma. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Sep. 19.43 UT: m1=11.4:, Dia.=3.3’, DC=2/3; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Magnitude uncertain; stars in coma. Coma very diffuse. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Sep. 15.41 UT: m1=11.0:, Dia.=2.4’, DC=3; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Magnitude uncertain; close to bright star pairing, difficult to separate from stars. Coma diffuse with opaque centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Sep. 07.93 UT: m1=10.4, Dia.=3′, DC=3; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Aug. 23.43 UT: m1=10.3, Dia.=4.2’, DC=5; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, opaque centre. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Aug. 22.04 UT: m1=9.7, Dia.=4′, DC=3; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Aug. 19.42 UT: m1=10.5, Dia.=3.5’, DC=5; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, moderately condensed centre, enhances slightly in Swan band filter. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Aug. 17.41 UT: m1=10.1, Dia.=3.2’, DC=5; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma centre well condensed, enhances slightly in Swan band filter. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Aug. 14.43 UT: m1=10.1, Dia.=4.8’, DC=5/6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, faintly extended to the North approximately. Faint stellar central condensation visible in periods of good seeing. Dims in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Aug. 12.39 UT: m1=9.9, Dia.=4.5’, DC=5/6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma fanned to the North approximately, opaque inner coma with faint stellar central condensation visible in periods of good seeing. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Aug. 10.97 UT: m1=9.2, Dia.=6′, DC=2; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Aug. 10.36 UT: m1=9.8, Dia.=3’, DC=5/6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Outer coma diffuse and appears fan shaped to the North approximately; Inner coma opaque with small faint stellar central condensation visible in periods of good seeing. Coma dims slightly in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 July 26.06 UT: m1=8.5, Dia.=7′, DC=3; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 July 25.42 UT: m1=9.6, Dia.=4’, DC=6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma dims in Swan Band filter, elongated slightly to the NE. Faint stellar central condensation surrounded by an opaque inner coma and fading to semi-transparent outer coma. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 July 22.92 UT: m1=7.8, Dia.=8′, DC=3; 25×100 B; Juan Jose Gonzalez (Alto del Trichero – Soto y Amio, Leon, Spain; Alt. 1190 m, 42º 46′ N, 5º 53′ W) [Altitude: 7 deg. Several stars in coma, the brightest being mag 9.4 (TK). Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2017 July 20.42 UT: m1=8.8, Dia.=10.3’, DC=3; 11×70 B; Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, moderately condensed centre. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 July 19.89 UT: m1=8.4, Dia=6′, DC=3, no tail; 20-cm SCT (50x); Carlos Labordena (Castellón, España)
2017 July 15.00 UT: m1=8.2, Dia.=8′, DC=3; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 July 14.93 UT: m1=7.7, Dia.=10′, DC=3/; 25×100 B; Juan Jose Gonzalez (Alto del Castro – Aralla, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2017 July 14.86 UT: m1=9.3, Dia.=4′, DC=3; 30.5-cm L f:5 (97x); J. P. Navarro Pina (Campos del Rio, Murcia, Spain)
2017 July 11.38 UT: m1=8.5, Dia.=16’, DC=3; 7×50 B; Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre. Moonlight. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= S; Cat= TK]
2017 June 30.60 UT: m1=7.9, Dia.=12.9’, DC=3/4; 7×50 B; Chris Wyatt (Walcha, NSW, Australia) [Diffuse coma, a little interference by background stars. Low altitude = 19.8°. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 June 29.87 UT: m1=8.6, Dia.=5′, DC=3; 13-cm L (65x); Alexsandr Morozov (Novozybkov, Russia)
2017 June 28.07 UT: m1=7.7, Dia.=12′, DC=3; 7×50 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 June 28.06 UT: m1=7.9, Dia.=10′, DC=3/; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 June 27.84 UT: m1=8.3, Dia.=5.9′, DC=4; 25-cm L (42x, 70x); Danil Sidorko (Korenovsk, Russia) [SQM= 20.22]
2017 June 26.97 UT: m1=8.0:, Dia.=10′, DC=3; 7×50 B; Willian Souza (Rheinsberg, Germany)
2017 June 26.87 UT: m1=8.2, Dia.=10′, DC=5; 20×80 B: Marek Biely (244 m.a.s.l., Brno, Czech Republic) [Still also a hint of tail visible]
2017 June 26.83 UT: m1=8.3, Dia.=5.5′, DC=4/; 25-cm L (42x, 70x); Danil Sidorko (Korenovsk, Russia) [SQM= 21.29]
2017 June 26.50 UT: m1=8.1, Dia.=13’, DC=3/4; 7×50 B; Chris Wyatt (Moonbi, NSW, Australia) [Coma diffuse, slight brightening to centre. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 June 24.98 UT: m1=7.8, Dia.=10’, DC=2, no tail; 10×50 B; Alberto Anunziato (Paraná, Argentina) [Met. Sidgwick, Cat. Tycho II. Estrellas de comparación; HIP 69572 y 69414]
2017 June 24.92 UT: m1=8.5, Dia.=5′, DC=3/; 25×100 B; Martin Lehky (Czech Republic)
2017 June 24.45 UT: m1=8.3, Dia.=10.6’, DC=3; 10×50 R; Chris Wyatt (Moonbi, NSW, Australia) [Coma diffuse, slight brightening to centre. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 June 23.92 UT: m1=8.6, Dia.=4′, DC=3/; 25×100 B; Martin Lehky (Czech Republic)
2017 June 23.90 UT: m1=8.0, Dia.=8′, DC=4, Tail= 11′; 15-cm T (30x); Carlos Labordena (Castellón, España)
2017 June 23.05 UT: m1=7.7, Dia.=12′, DC=3; 7×50 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 June 23.04 UT: m1=7.8, Dia.=10′, DC=3/; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 June 22.46 UT: m1=7.7, Dia.=13’, DC=3; 7×50 B; Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 June 22.12 UT: m1=7.8, Dia.=10′, DC=3/; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 June 21.88 UT: m1=10.7 CCD, Dia.=1.30′, DC=6/; 15-cm reflector f/3.2; Sergey Shurpakov (Baran’, Belarus)
2017 June 21.52 UT: m1=7.7, Dia.=16.5’, DC=4; 7×50 B; Chris Wyatt (Walcha, NSW, Australia) [Slight enhancement in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 June 21.00 UT: m1=7.1, Dia.=15′, DC=3/; 12×45 monocular; Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.5]
2017 June 20.92 UT: m1=8.5, Dia.=5′, DC=3/; 25×100 B; Martin Lehky (Czech Republic)
2017 June 20.83 UT: m1=8.2, Dia.=6.2′, DC=3/; 25-cm L (42x, 70x); Danil Sidorko (Korenovsk, Russia) [SQM = 21.29]
2017 June 20.49 UT: m1=7.5:; 10×50 B; David A. J. Seargent (Cowra, NSW, Australia)
2017 June 20.44 UT: m1=7.9, Dia.=12.5’, DC=3/4; 7×50 B; Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight interference from nearby stars. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 June 19.92 UT: m1=8.4, Dia.=4′, DC=4; 25×100 B; Martin Lehky (Czech Republic)
2017 June 19.87 UT: m1=8.0, Dia.=5′, DC=4/; 13-cm L (26x); Alexsandr Morozov (Novozybkov, Russia) [Morris’s method, green zone]
2017 June 18.98 UT: m1=8.4, Día.=5´, DC=3; 25-cm L (66x); Gonzalo Vargas (Cochabamba, Bolivia) [Se observó alargamiento abierto como abanico de la coma entre un ángulo AP de 46 a 51 grados aproximadamente]
2017 June 18.92 UT: m1=8.4, Dia.=4′, DC=4; 25×100 B; Martin Lehky (Czech Republic)
2017 June 16.90 UT: m1=8.2, Dia.=8′, DC=5; 20×80 B; Valentín Díaz (La Romaneta, Alicante,España)
2017 June 16.90 UT: m1=10.0 CCD, Dia.=2.05′, DC=6/; 15-cm reflector f/3.2; Sergey Shurpakov (Baran’, Belarus)
2017 June 16.83 UT: m1=8.3, Dia.=5.5′, DC=3, Tail= 7′ in PA: 330 deg.; 25-cm L (42x, 70x); Danil Sidorko (Korenovsk, Russia) [SQM = 20.37]
2017 June 15.37 UT: m1=7.6, Dia.=13.1’, DC=3; 7×50 B; Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, opaque centre, semi-transparent outer coma. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= S; Cat= TK]
2017 June 14.94 UT: m1=7.2, Dia.=15′, DC=3/, Tail= 0.5 deg. in PA: 340 deg.; 12×45 monocular; Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.5]
2017 June 14.90 UT: m1=7.8, Dia.=6.5, DC=4/; 10.0-cm B(29x); Maik Meyer (Limburg, Germany)
2017 June 14.88 UT: m1=8.3:, Dia.=3.5′, DC=4; 20-cm L f/6 (37x); Marian Legutko (Gliwice, Poland) [bright sky, partly cloudy; Sidgwick method]
2017 June 13.90 UT: m1=8.5, Dia.=6′, DC=4, Tail= 10′; 20-cm SCT (50x); Carlos Labordena (Castellón, España)
2017 June 13.87 UT: m1=7.9, Dia.=6′, DC=4/; 13-cm L (26x); Alexsandr Morozov (Novozybkov, Russia)
2017 June 12.92 UT: m1=8.2, Dia.=5′, DC=4; 25×100 B; Martin Lehky (Czech Republic)
2017 June 12.86 UT: m1=10.1, Dia.=5′, DC=6; 30.5-cm L f/4.9 (97x); J. P. Navarro Pina (Cañadas de San Pedro, Murcia, Spain) [Sidgwick method. Lm=5.7]
2017 June 11.94 UT: m1=8.2, Dia.=10′, DC=3/; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 June 09.97 UT: m1=10.0 CCD, Dia.=1.86′, DC=6/; 15-cm reflector f/3.2; Sergey Shurpakov (Baran’, Belarus)
2017 June 04.89 UT: m1=8.0; 10-cm R (34x); Willian Souza (Sao Paulo, Brazil)
2017 June 03.89 UT: m1=8.0:; 10-cm R (34x); Willian Souza (Sao Paulo, Brazil)
2017 June 02.97 UT: m1=7.6, Dia.=9′, DC=4; 10×50 B; Martin Lehky (Czech Republic)
2017 June 02.89 UT: m1=8.0:; 10-cm R (34x); Willian Souza (Sao Paulo, Brazil)
2017 June 02.17 UT: m1=7.5, Dia.=12′, DC=3/; 7×50 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 June 02.16 UT: m1=7.7, Dia.=8′, DC=4/; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 June 01.97 UT: m1=7.5, Dia.=8′, DC=4/; 10.0-cm B(29x); Maik Meyer (Limburg, Germany)
2017 May  31.94 UT: m1=7.6, Dia.=10, DC=4; 5-cm B(10x); Martin Lehky (Czech Republic)
2017 May  31.88 UT: m1=9.3 CCD, Dia.=3.21′, DC=6/, Tail= 20′ in PA: 329 deg.; 7-cm refractor f/4.5 + CCD; Sergey Shurpakov (Baran’, Belarus)
2017 May  31.86 UT: m1=7.5, Dia.=2.8′, DC=4/; 11-cm B(20x); Sergey Shurpakov (Baran’, Belarus)
2017 May  30.87 UT: m1=7.6, Dia.=6′, DC=5/; 13-cm L (26x); Alexsandr Morozov (Novozybkov, Russia)
2017 May  30.13 UT: m1=7.8, Dia.=6′, DC=4; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 May  30.01 UT: m1=7.6, Dia.=11′, DC=5; 5-cm B(10x); Martin Lehky (Czech Republic)
2017 May  28.94 UT: m1=7.6, Dia.=11′, DC=5; 5-cm B(10x); Martin Lehky (Czech Republic)
2017 May  28.87 UT: m1=8.0:, Dia.=4′, DC=5; 20-cm L F/6 (37x); Marian Legutko (Gliwice, Poland) [bright sky, moderate transparency, increasing cloudcover; no tail visible; Morris method]
2017 May  27.94 UT: m1=7.7, Dia.=10′, DC=4/; 5-cm B(10x); Martin Lehky (Czech Republic)
2017 May  27.88 UT: m1=8.2:, Dia.=4′, DC=5; 20-cm L F/6 (37x); Marian Legutko (Gliwice, Poland) [bright sky, moderate transparency; no tail visible; Morris method]
2017 May  27.85 UT: m1=7.8, Dia.=5.4′, DC=4, Tail= 8′ in PA 315 deg.; 25-cm L (42x, 70x); Danil Sidorko (Korenovsk, Russia) [SQM= 20.51]
2017 May  27.84 UT: m1=7.8, Dia.=8′, DC=4; 6-cm B (20x); Alexsandr Morozov (Novozybkov, Russia)
2017 May  27.42 UT: m1=7.5, Dia.=15’, DC=4; 7×50 B; Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, opaque centre, moderately condensed. Coma extended to NW approximately. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 May  27.13 UT: m1=7.8, Dia.=6′, DC=4; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 May  26.90 UT: m1=7.7, Dia.=13′, DC=4/; 5-cm B(10x); Martin Lehky (Czech Republic)
2017 May  26.49 UT: m1=7.7, Dia.=10.0; 10×50 B; David A. J. Seargent (Cowra, NSW, Australia)
2017 May  26.48 UT: m1=7.6, Dia.=12.1’, DC=4; 7×50 B; Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, gradual brightening to centre, coma extended to the NW approximately. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 May  26.01 UT: m1=7.7, Dia.=13′, DC=4/; 5-cm B(10x); Martin Lehky (Czech Republic)
2017 May  25.96 UT: m1=7.3, Dia.=18′, DC=7; 8×56 B; Alex Scholten (Eerbeek, Netherlands)
2017 May  25.90 UT: m1=9.5 CCD, Dia.=3.06′, DC=7/, Tail= 26′ in PA: 320 deg.; 7-cm refractor f/4.5 + CCD; Sergey Shurpakov (Baran’, Belarus)
2017 May  25.88 UT: m1=7.9, Dia.=4.3′, DC=5; 11-cm B (20x); Sergey Shurpakov (Baran’, Belarus)
2017 May  25.03 UT: m1=7.8, Dia.=10′, DC=4/; 5-cm B(10x); Martin Lehky (Czech Republic)
2017 May  24.42 UT: m1=7.8:, Dia.=12’, DC=4; 7×50 B; Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, 8th magnitude background star in coma visible which interfered with observation. Slight hint of tail to the NW approximately. Low altitude = 18.4°. Easy to locate in a dark sky. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 May  24.41 UT: m1=8.3, Dia.=4.3’, DC=5/6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Dust tail visible 10’ in length in P.A. 337° approximately. Low altitude = 16.6°. Transparent outer coma, opaque inner coma, small bright central condensation appears stellar sometimes. Inner coma does not enhance in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 May  24.01 UT: m1=7.1, Dia.=15′, DC=4/, Tail= 0.5 deg. in PA: 320 deg.; 12×45 monocular; Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [The comet shows a much wider coma diameter, providing a brighter m1 estimate in comparison with my previous May 3.12 observation; there is also a lesser influence of the inner dust tail on the magnitude estimate. Sidgwick method. Tycho-2 comparison stars. SQM: 21.5 at zenith]
2017 May  23.89 UT: m1=7.8, Dia.=12′, DC=4; 5-cm B(10x); Martin Lehky (Czech Republic)
2017 May  23.89 UT: m1=8.2, Dia.=6′, DC=4, Tail= 15′; 15-cm T (30x); Carlos Labordena (Castellón, España)
2017 May  22.93 UT: m1=7.8, Dia.=12′, DC=3/; 5-cm B(10x); Martin Lehky (Czech Republic)
2017 May  22.92 UT: m1=8.1, Dia.=9′, DC=4; 10-cm B(25x); Martin Lehky (Czech Republic)
2017 May  22.87 UT: m1=9.3, Dia.=5′, DC=9; 30.5-cm L f/4.9 (47x); J. P. Navarro Pina & Manuel Hernandez (Puerto de la Cadena, Murcia, Spain) [comet very condensed and bright]
2017 May  21.89 UT: m1=8.3, Dia.=6.5′, DC=5/; 13-cm L (26x); Alexsandr Morozov (Novozybkov, Russia)
2017 May  21.89 UT: m1=9.3 CCD, Dia.=2.19′, DC=6; 7-cm refractor f/4.5 + CCD; Sergey Shurpakov (Baran’, Belarus)
2017 May  21.87 UT: m1=7.9, Dia.=6.1′, DC=5; 11-cm B (20x); Sergey Shurpakov (Baran’, Belarus)
2017 May  21.50 UT: m1=8.3, Dia.=6.0′, DC=5, Tail= 0.16 degrees in PA: 300 deg.; 25×100 B; David A. J. Seargent (Cowra, NSW, Australia) [Little change using Swan Banf filter, though possibly marginally fainter with filter]
2017 May  19.91 UT: m1=9.4 CCCD, Dia.=3.21′, DC=7, Tail= 14′ in PA: 309 deg.; 7-cm refractor f/4.5 + CCD; Sergey Shurpakov (Baran’, Belarus)
2017 May  19.90 UT: m1=7.8, Dia.=7′, DC=5; 20×80 B; Valentín Díaz (La Hoya, Alicante, España)
2017 May  19.90 UT: m1=8.0, Dia.=11′, DC=3/; 5-cm B(10x); Martin Lehky (Czech Republic)
2017 May  19.89 UT: m1=8.3, Dia.=9′, DC=4; 10-cm B(25x); Martin Lehky (Czech Republic)
2017 May  19.89 UT: m1=7.8, Dia.=6.1′, DC=5; 11-cm B (20x); Sergey Shurpakov (Baran’, Belarus)
2017 May 19.89 UT: m1=8.0, Dia.=5′, DC=4, no tail; 8cm B (11x); Carlos Labordena (Castellón, España)
2017 May 19.88 UT: m1=8.3, Dia.=6′, DC=4, Tail= 13′; 20-cm SCT (50x); Carlos Labordena (Castellón, España)
2017 May  19.88 UT: m1=8.4, Dia.=6.5′, DC=4, Tail= 0.2 deg. in PA: 315 deg.; 20×80 B; Marek Biely (Brno, Czech Republic) [Observed through thin high clouds but with almost no interference]
2017 May  19.83 UT: m1=8.3, Dia.=7′, DC=5; 13-cm L (26x); Alexsandr Morozov (Novozybkov, Russia)
2017 May  19.81 UT: m1=8.2, Dia.=6.8′, DC=4, Tail= 2.5′ in PA: 300 deg.; 25-cm L (42x, 70x); Danil Sidorko (Korenovsk, Russia)
2017 May  19.09 UT: m1=8.2, Dia.=12´, DC=4/; 25-cm L F/4.5 (66x); Gonzalo Vargas (Cochabamba, Bolivia) [Se observó un alargamiento de la coma en un ángulo AP estimado en 292 grados]
2017 May  18.94 UT: m1=8.0, Dia.=10′, DC=3; 5-cm B(10x); Martin Lehky (Czech Republic)
2017 May  18.93 UT: m1=8.3, Dia.=8′, DC=3; 10-cm B(25x); Martin Lehky (Czech Republic)
2017 May  18.91 UT: m1=8.3, Dia.=7′, DC=3/, Tail= 0.3 deg. in PA: 320 deg.; 20×80 B; Marek Biely (Brno, Czech Republic)
2017 May  18.88 UT: m1=8.1:, Dia.=5′, DC=3; 20-cm L F/6 (37x); Marian Legutko (Gliwice, Poland) [light pollution, good transparency; no tail visible; Sidgwick method]
2017 May  18.84 UT: m1=8.4, Dia.=6.2′, DC=3/, Tail= 3′ in PA: 310 deg.; 25-cm L (42x, 70x); Danil Sidorko (Korenovsk, Russia)
2017 May  17.88 UT: m1=9.6 CCD, Dia.=3.5′, DC=7/; 7-cm refractor f/4.5 + CCD; Sergey Shurpakov (Baran’, Belarus)
2017 May  17.85 UT: m1=8.3, Dia.=6.5′, DC=4/; 11-cm B (20x); Sergey Shurpakov (Baran’, Belarus)
2017 May  17.83 UT: m1=8.3, Dia.=7′, DC=6; 23.5-cm T (65x); Alexsandr Morozov (Novozybkov, Russia)
2017 May  15.86 UT: m1=8.3, Dia.=4.5′, DC=4/; 11-cm B(20x); Sergey Shurpakov (Baran’, Belarus)
2017 May  14.89 UT: m1=8.2, Dia.=4′, DC=4/; 11-cm B(20x); Sergey Shurpakov (Baran’, Belarus)
2017 May  14.82 UT: m1=8.1, Dia.=5′, DC=5; 13-cm L (26x); Alexsandr Morozov (Novozybkov, Russia)
2017 May  13.93 UT: m1=9.7 CCD, Dia.=3.06′, DC=7/, Tail= 18′ in PA: 311 deg.; 7-cm refractor f/4.5 + CCD; Sergey Shurpakov (Baran’, Belarus)
2017 May  13.87 UT: m1=8.9:, Dia.=3′, DC=2; 20-cm L f/6 (49x); Marian Legutko (Gliwice, Poland) [bright sky, moderate transparency; no tail visible; Sidgwick method]
2017 May  12.87 UT: m1=9.7 CCD, Dia.=2.80′, DC=7; 7-cm refractor f/4.5 + CCD; Sergey Shurpakov (Baran’, Belarus)
2017 May  12.85 UT: m1=8.5, Dia.=4′, DC=3/; 11-cm B(20x); Sergey Shurpakov (Baran’, Belarus)
2017 May  11.87 UT: m1=9.5 CCD, Dia.=2.63′, DC=6/, Tail= 10′ in PA: 299 deg.; 7-cm refractor f/4.5 + CCD; Sergey Shurpakov (Baran’, Belarus)
2017 May  09.91 UT: m1=10.1 CCD, Dia.=1.75′, DC=6/; 7-cm refractor f/4.5 + CCD; Sergey Shurpakov (Baran’, Belarus)
2017 May  06.72 UT: m1=8.4, Dia.=4.6’, DC=5/6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Dust tail visible 15’ in length in P.A. 297° approximately. Low altitude = 7.6°. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 May  06.20 UT: m1=8.9, Dia.=6′, DC=4, Tail= 12′; 20-cm SCT (50x); Carlos Labordena (Castellón, España)
2017 May  04.89 UT: m1=8.3, Dia.=4.6′, DC=4; 11-cm B(20x); Sergey Shurpakov (Baran’, Belarus)
2017 May  04.85 UT: m1=9.5 CCD, Dia.=3.00′, DC=6/, Tail= 9.5′ in PA: 306 deg.; 7-cm refractor f/4.5 + CCD; Sergey Shurpakov (Baran’, Belarus)
2017 May  04.76 UT: m1=8.1, Dia.=6.5′, DC=5; 10×70 R; Seiichi Yoshida (Gunma, Japan)
2017 May  04.72 UT: m1=8.6, Dia.=7.5′, DC=6; 40.0-cm L f/4.5 (36x); Seiichi Yoshida (Gunma, Japan)
2017 May  03.82 UT: m1=8.8, Dia.=5′, DC=4; 13-cm L (26x); Alexsandr Morozov (Novozybkov, Russia)
2017 May  03.81 UT: m1=9.9 CCD, Dia.=2.62′, DC=6/; 7-cm refractor f/4.5 + CCD; Sergey Shurpakov (Baran’, Belarus)
2017 May  03.12 UT: m1=8.8, Dia.=7′, DC=4/, Tail= 0.2 deg. in PA: 300 deg.; 20-cm SCT (77x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m,  42º 54′ N, 5º 48′ W) [In 10×50 binoculars: m=7.7 for the coma + brighter inner dust tail. Sidgwick method. Tycho-2 comparison stars. SQM: 21.7 at zenith]
2017 May  02.89 UT: m1=8.0, Dia.=7′, DC=4; 10-cm B(25x); Martin Lehky (Czech Republic)
2017 May  02.87 UT: m1=10.2 CCD, Dia.=2.48′, DC=6/; 7-cm refractor f/4.5 + CCD; Sergey Shurpakov (Baran’, Belarus)
2017 May  02.83 UT: m1=8.5, Dia.=4.7′, DC=4; 11-cm B(20x); Sergey Shurpakov (Baran’, Belarus)
2017 May  01.91 UT: m1=9.4, Dia.=5′, DC=3; 30.5-cm L (47x); J. P. Navarro Pina (Puerto de la Cadena, Murcia, Spain) [new method visual adapted Navarro-Beyer]
2017 May  01.91 UT: m1=9.7, Dia.=4′, DC=3; 25.4-cm L (48x); A. M. Hernandez (Puerto de la Cadena, Murcia, Spain) [new method visual adapted Navarro-Beyer]
2017 May  01.90 UT: m1=9.3:, Dia.=2′, DC=2; 20-cm L f/6 (68x); Marian Legutko (Gliwice, Poland) [bright sky, poor transparency; no tail visible; Sidgwick method]
2017 Apr. 30.90 UT: m1=8.2, Dia.=7′, DC=4; 25×100 B; Martin Lehky (Czech Republic) [Morris Method]
2017 Apr. 30.25 UT: m1=8.8, Dia.=5′, DC=4; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Apr. 29.85 UT: m1=8.4, Dia.=6.5′, DC=4; 20×88 B; Maik Meyer (Limburg, Germany)
2017 Apr. 28.83 UT: m1=8.4, Dia.=6′, DC=3/; 13-cm L (52x); Alexsandr Morozov (Novozybkov, Russia)
2017 Apr. 28.72 UT: m1=8.8, Dia.=3.8’, DC=6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Faint tail visible 17.3’ in length in P.A. 304° approximately; Inner coma fan shaped to the West, central condensation offset to the Eastern edge of the coma. Enhances in Swan Band filter. Low altitude = 10.1°. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Apr. 28.12 UT: m1=9.2, Dia.=4′, DC=5, Tail= 0.2 deg. in PA: 300 deg.; 20-cm SCT (77x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [In 10×50 binoculars: m=7.7 for the coma + brighter inner dust tail. Sidgwick method. Tycho-2 comparison stars. SQM: 21.6 at zenith]
2017 Apr. 26.901 UT: m1=8.9, Dia.=6′, DC=5; 20×80 B; Neil Norman (FRAS, Ipswich, England)
2017 Apr. 24.83 UT: m1=8.4, Dia.=7′, DC=3; 20×100 B; Martin Lehky (Czech Republic) [Morris Method]
2017 Apr. 22.91 UT: m1=9.2, Dia.=5′, DC=3; 30.5-cm L (97x); J. P. Navarro Pina (Puerto de la Cadena, Murcia, Spain)
2017 Apr. 22.83 UT: m1=8.9, Dia.=5′, DC=4; 13-cm L (26x); Alexsandr Morozov (Novozybkov, Russia)
2017 Apr. 22.25 UT: m1=8.8, Dia.=4′, DC=4; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Apr. 21.14 UT: m1=9.2, Dia.=4′, DC=5, Tail= 0.2 deg. in PA: 300 deg.; 20-cm SCT (77x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.4 at zenith]
2017 Apr. 20.91 UT: m1=8.7, Dia.=4′, DC=4, Tail=10′; 10.2-cm R (20x); Carlos Labordena (Castellón, España)
2017 Apr. 19.92 UT: m1=10.9 CCD, Dia.=0.96′,DC=6/; 0.25-m f/4.7 reflector + CCD; Sergey Shurpakov (Observatory C36, Baran’, Belarus)
2017 Apr. 19.87 UT: m1=8.3, Dia.=8′, DC=3/; 20×88 B; Maik Meyer (Limburg, Germany)
2017 Apr. 19.85 UT: m1=8.9, Dia.=4′, DC=3/; 11-cm B(20x); Sergey Shurpakov (Observatory C36, Baran’, Belarus)
2017 Apr. 19.85 UT: m1=9.1, Dia.=5′, DC=4/; 13-cm L (26x); Alexsandr Morozov (Novozybkov, Russia) [S – Sidgwick`s method]
2017 Apr. 18.88 UT: m1=8.7, Dia.=9′, DC=3/; 20×88 B; Maik Meyer (Limburg, Germany)
2017 Apr. 17.87 UT: m1=9.3 CCD, Dia.=0.92, DC=6/; 0.25-m f/4.7 reflector + CCD; Serguey Shurpakov (Observatory C36, Baran’, Belarus)
2017 Apr. 17.78 UT: m1=9.0, Dia.=3.5′, DC=5; 13-cm L (65x); Alexsandr Morozov (Novozybkov, Russia) [S – Sidgwick`s method]
2017 Apr. 16.77 UT: m1=9.3, Dia.=3.2′, DC=4, Tail= 2.5′ in PA: 310 deg.; 25-cm L (42x, 70x); Danil Sidorko (Korenovsk, Russia)
2017 Apr. 14.91 UT: m1=9.0, Dia.=4′, DC=4, Tail=9′; 10.2-cm R (20x); Carlos Labordena (Castellón, España)
2017 Apr. 13.89 UT: m1=9.4, Dia.=4.5′, DC=3; 26×88 B; Maik Meyer (Limburg, Germany)
2017 Apr. 07.16 UT: m1=9.2, Dia.=4′, DC=4/; 20-cm SCT (77x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m,  42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. Some moonlight interference. SQM: 21.0 at zenith]
2017 Apr. 05.73 UT: m1=9.6, Dia.=4’, DC=5/6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma enhances slightly in Swan Band filter, faint tail visible and traced to 9.6’ in P.A. 298° approximately. Low altitude= 11.4°. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Apr. 05.10 UT: m1=9.3, Dia.=3.5′, DC=4/; 15.2-cm R (38x); Maik Meyer (Limburg, Germany)
2017 Apr. 05.03 UT: m1=9.1, Dia.=4′; 13-cm L (65x); Alexsandr Morozov (Novozybkov, Russia)
2017 Apr. 04.90 UT: m1=10.9 CCD, Dia.=1.55′, DC=6/; 0.25-m f/4.7 reflector + CCD; Serguey Shurpakov (Observatory C36, Baran’, Belarus)
2017 Apr. 04.12 UT: m1=9.4, Dia.=4′, DC=4, Tail= 0.2 deg. in PA: 310 deg.; 20-cm SCT (77x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m,  42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM : 21.7 at zenith]
2017 Apr. 03.72 UT: m1=9.7, Dia.=3.8’, DC=5; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma enhances in Swan Band filter, faint dust tail visible 14’ in length in P.A. 318° approximately; Low altitude= 11.4°. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Apr. 02.09 UT: m1=8.9, Dia.=6′, DC=4, Tail= 0.15 deg. in PA: 290 deg.; 20×80 B; Marek Biely (Brno, Czech Republic, 244 m.a.s.l.)
2017 Apr. 01.948 UT: m1=9.3, Dia.=3′, DC=4; 20×80 B; Neil Norman (FRAS, Ipswich, England)
2017 Apr. 01.81 UT: m1=9.9, Dia.=4′, DC=3; 20-cm f/4 L (45x); Andrew Pearce (Bailup, W. Australia)
2017 Mar. 31.84 UT: m1=9.4, Dia.=2′, DC=3/, Tail= 3′ in PA: 305 deg.; 25-cm L (42x, 70x); Danil Sidorko (Korenovsk, Russia)
2017 Mar. 31.81 UT: m1=9.8, Dia.=3.5′, DC=4/; 20-cm f/4 L (45x); Andrew Pearce (Bailup, W. Australia)
2017 Mar. 29.84 UT: m1=9.5, Dia.=2′, DC=3/, Tail= 2.5′ in PA: 300 deg.; 25-cm L (42x & 70x); Danil Sidorko (Korenovsk, Russia)
2017 Mar. 29.31 UT: m1=9.3, Dia.=4′, DC=4; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil) [enhanced image with Swan band filter]
2017 Mar. 29.10 UT: m1=9.4 CCD, Dia.=2.4′, Tail (dust)= 0.13 deg in p.a. 315 deg.; 15-cm L + CCD + Rc filter, f/4; Mieczyslaw Leszek Paradowski (Lublin, Poland)
2017 Mar. 29.08 UT: m1=9.1 CCD, Dia.=8.6′; 15-cm L + CCD + V filter, f/4; Mieczyslaw Leszek Paradowski (Lublin, Poland)
2017 Mar. 28.89 UT: m1=9.1, Dia.=5.0′, DC=4; 20×80 B; Marek Biely (Brno, Czech Republic, 244 m.a.s.l.)
2017 Mar. 28.84 UT: m1=8.9, Dia.=8′, DC=4; 13-cm L (26x); Alexsandr Morozov (Novozybkov, Russia)
2017 Mar. 28.82 UT: m1=8.6, Dia.=11′, DC=2/; 6-cm B (20x); Alexsandr Morozov (Novozybkov, Russia)
2017 Mar. 28.15 UT: m1=9.8, Dia.=4′, DC=4, Tail= 8′; 20-cm SCT(50x); Carlos Labordena (Castellón, España)
2017 Mar. 28.15 UT: m1=9.4, Dia.=6′, DC=3/, Tail= 0.2 deg. in PA: 310 deg.; 20-cm SCT (77x); Juan Jose Gonzalez (Collado del Fresno, Asturias, Spain; Alt. 1280 m, 43º 10′ N, 5º  54′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.5 at zenith. Dust tail 0.2-deg in p.a. 310 deg.]
2017 Mar. 27.86 UT: m1=9.5, Dia.=4.5′, DC=3/; 20×80 B; Marek Biely (Brno, Czech Republic, 244 m.a.s.l.)
2017 Mar. 27.70 UT: m1=9.7, Dia.=3.9’, DC=4; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Faint tail visible, 16’ in length in P.A. 307° approximately; Coma dims slightly in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Mar. 27.06 UT: m1=9.2, Dia.=2.5′, DC=5; 60-cm L (78x); Sandor Szabo (Hungary) [Tail is 15′ long to PA= 300-320 deg.]
2017 Mar. 26.93 UT: m1=9.2, Dia.=4.3′, DC=4; 20×80 B; Marek Biely (Brno, Czech Republic, 244 m.a.s.l.) [Impression of seeing a hint of tail.]
2017 Mar. 25.92 UT: m1=9.6, Dia.=5′, DC=4; 15.2-cm R f:5 (38x); Mail Mayer (Limburg, Germany)
2017 Mar. 24.94 UT: m1=8.5, Dia.=5′, DC=4; 13-cm L (26x); Alexsandr Morozov (Novozybkov, Russia) (Lm=6.2)
2017 Mar. 23.83 UT: m1=11.7 CCD, Dia.=1.5′, DC=4, Tail= 6.5′ in PA: 300 deg.; 20-cm L + CCD; Danil Sidorko (Korenovsk, Russia)
2017 Mar. 23.82 UT: m1=9.8, Dia.=4′, DC=4/; 25-cm (150x); Danil Sidorko (Korenovsk, Russia)
2017 Mar. 22.57 UT: m1=9.5, Dia.=5.5′, DC=5; 40.0-cm L f/4.5 (36x); Seiichi Yoshida (Ibaraki, Japan)
2017 Mar. 20.89 UT: m1=9.3, Dia.=3′, DC=3; 13-cm L (52x); Alexsandr Morozov (Novozybkov, Russia)
2017 Mar. 20.04 UT: m1=9.7, Dia.=5′, DC=3/, Tail= 0.2 deg. in PA: 320 deg.; 20-cm SCT (77x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.7 at zenith. Dust 0.2-deg in PA 320 deg]
2017 Mar. 20.03 UT: m1=10.1, Dia.=3′, DC=5, no tail; 20-cm SCT (50x); Carlos Labordena (Castellón, España)
2017 Mar. 18.98 UT: m1:10.4, Dia.=4′, DC=3; 25-cm L (104x); Valentín Díaz (La Romaneta, Alicante, España)
2017 Mar. 16.95 UT: m1=11.4 CCD, Dia.=1.13′, DC=6/, Tail= 9.5′ in PA: 323 deg.; 0.25-m f/4.7 reflector + CCD; S. Shurpakov (Observatory C36, Baran’, Belarus)
2017 Mar. 13.87 UT: m1=11.7 CCD, Dia.=0.89′, DC=6/; 0.25-m f/4.7 reflector + CCD; S. Shurpakov (Observatory C36, Baran’, Belarus)
2017 Mar. 10.11 UT: m1=9.7, Dia.=4′, DC=2/; 13-cm L (65x); Alexsandr Morozov (Novozybkov, Russia)
2017 Mar. 09.86 UT: m1=11.7 CCD, Dia.=0.88′, DC=6/, Tail= 3.5′ in PA: 321 deg.; 0.25-m f/4.7 reflector + CCD; S. Shurpakov (Observatory C36, Baran’, Belarus)
2017 Mar. 06.98 UT: m1=10.0, Dia.=3.5′, DC=3/; 25-cm (150x); Danil Sidorko (Korenovsk, Russia)
2017 Mar. 06.96 UT: m1=10.6 CCD, Dia.=2.3′, DC=4, Tail= 3.5′ in PA: 300 deg.; 20-cm L + CCD; Danil Sidorko (Korenovsk, Russia)
2017 Mar. 06.74 UT: m1=10.3, Dia.=2.6’, DC=6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Inner coma enhances slightly in Swan Band filter, outer coma diffuse. Some interference by 11.6 mag star in coma, 1.4’ from the central condensation. Low altitude= 9.8°. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Mar. 05.96 UT: m1=12.0 CCD, Dia.=1′, DC=4, Tail= 2.2′ in PA: 288 deg.,; 20-cm L + CCD; Danil Sidorko (Korenovsk, Russia)
2017 Mar. 05.94 UT: m1=10.2, Dia.=2.8′, DC=4; 25-cm (150x); Danil Sidorko (Korenovsk, Russia)
2017 Mar. 04.99 UT: m1=11.8 CCD, Dia.=1.2′, DC=4/, Tail= 2.3′ in RA: 285 deg.; 20-cm L; Danil Sidorko (Korenovsk, Russia)
2017 Mar. 04.98 UT: m1=10.1, Dia.=3.25′, DC=4/; 25-cm L (150x); Danil Sidorko (Korenovsk, Russia)
2017 Mar. 04.05 UT: m1=11.7 CCD, Dia.=1.0′, DC=6/, Tail= 6′ in PA: 281 deg.; 0.25-m f/4.7 L + CCD; Sergey Shurpakov (Observatory C36, Baran’, Belarus)
2017 Mar. 02.02 UT: m1=10.5, m2=14.5, Dia.=2′, DC=s6, Tail= 3,5′ PA: 325 deg.; 25.4-cm L (109x); Gabor Santa (Göd, county Pest, Hungary) [nelm:6, 51 deg above horizon, SQM=19.5]
2017 Feb. 27.05 UT: m1=10.2, Dia.=2.5′, DC=5; 8-cm R (17x); Piotr Guzik (Koskowa Góra, Poland; Alt. 810 m, 49º 45′ N, 19º 47′ E) [Morris method used. SQM-L: 21.3 at zenith]
2017 Feb. 25.91 UT: m2=12.4 CCD, Dia.=0.59′, DC=6/, Tail= 5.3′ in PA: 326 deg.; 0.25-m f/4.7 reflector + CCD; S. Shurpakov (Observatory C36, Baran’, Belarus)
2017 Feb. 25.00 UT: m2=12.4 CCD, Dia.=0.59′, DC=8; 0.25-m f/4.7 reflector + CCD; S. Shurpakov (Observatory C36, Baran’, Belarus)
2017 Feb. 24.99 UT: m1=9.9, Dia.=4′, DC=3; 25×100 B; Juan Jose Gonzalez (La Vega de Robledo de Caldas, Leon, Spain; Alt. 1110 m, 42º 55′ N, 5º 53′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.5 at zenith. Mountain location, very clear sky]
2017 Feb. 24.99 UT: m1=10.3, Dia.=2′, DC=6, Tail= 0.15 deg. in PA:~300 deg.; 33-cm L (67x); Piotr Guzik (Teodorów, Poland, Alt. 287 m, 50º 27′ N, 20º 18′ E) [Morris method used. Broad dust tail realtively easy to see. Coma “grows” to ~4′ when viewed through SWAN band filter. Also visible in 10×50 binoculars at m1=9.7, Dia.=4′, DC=5. Excellent transparency. SQM: 21.3 at zenith.]
2017 Feb. 24.94 UT: m1=[10.3, NEGATIVE, Dia.=2.0′; 20×80 B; Marek Biely (Brno, Czech Republic, 244 m.a.s.l.) [Sometimes I had the impression that something really faint is visible in the predicted position, but I was not sure about it. Fainter than 10.3 mag.]
2017 Feb. 23.73 UT: m1=10.8, Dia.=3.3’, DC=4; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) {Slight Moonlight interference; Low altitude = 7.5°; Enhances slightly in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Feb. 21.99 UT: m1=11.0, m2=13.9, Dia.=1.5′, DC=s6, Tail= 4′ PA: 310 deg.; 25.4-cm L (133x); Gabor Santa (Göd, county Pest, Hungary) [nelm:6, 41 deg above horizon]
2017 Feb. 19.02 UT: m1=10.6, Dia.=1.5′, DC=4; 25.4-cm L f:5 (64x); Maik Meyer (Limburg, Germany)
2017 Feb. 18.03 UT: m1=10.7, Dia=2′, DC=4, no tail; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2017 Feb. 16.98 UT: m1=10.4, Dia.=3′, DC=3/; 20-cm SCT (77x); Juan Jose Gonzalez ( Alto de la Camperona, Leon, Spain; Alt. 1600 m, 42º 51′ N, 5º 12′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.4 at zenith. Mountain location, very clear sky]
2017 Feb. 15.89 UT: m1=[10.1, NEGATIVE, Dia.=1.5′; 20×80 B; Marek Biely (Brno, Czech Republic, 244 m.a.s.l.) [Fainter than 10.1 mag.]
2017 Feb. 15.86 UT: m1=10.6, Dia.=1.5′, DC=5; 33-cm L (67x); Piotr Guzik (Koskowa Góra, Poland, Alt. 800 m, 49º 45′ N, 19º 47′ E) [Morris method used. SQM: 21.1 at zenith]
2017 Feb. 14.91 UT: m1=11.8 CCD, Dia.=1.26′, DC=6/, Tail=7.5′ in PA: 275 deg; 0.25m f/4.7 reflector + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2017 Feb. 06.79 UT: m1=11.6, Dia.=2.5′, DC=6/, Tail= 4.5′ in PA: 310 deg; 40.0-cm L f/4.5 (75x); Seiichi Yoshida (Ibaraki, Japan)
2017 Jan. 29.93 UT: m1=11.6, Dia.=2.3′, DC=5; 35-cm L (62x); Jakub Cerny (Senohraby, Czech Republic)
2017 Jan. 28.15 UT: m1=11.4, Dia.=1.5′, DC=5, Tail= 0.07 deg in PA: 315 deg.; 33 cm L (67x); Piotr Guzik (Koskowa Góra, Poland; Alt. 800 m, 49º 45′ N, 19º 47′ E) [Morris method. APASS comparison stars. SQM: 20.9 at zenith]
2017 Jan. 27.99 UT: m1=10.4, Dia.=2.7′, DC=3/; 20×100 B; Martin Lehky (Czech Republic)
2017 Jan. 27.99 UT: m1=10.9, Dia.=1.3′, DC=6, Tail= 0.08 deg. PA: 280 deg.; 32.0-cm L (96x); Uwe Pilz (Leipzig, Germany)
2017 Jan. 26.99 UT: m1=10.4, Dia.=2.8′, DC=3/; 20×100 B; Martin Lehky (Czech Republic)
2017 Jan. 25.97 UT: m1=12.4 CCD, Dia.=0.74′, DC=6/, Tail=9′ in PA 322 deg.; 0.25-m f/4.7 reflector + CCD; Sergei Shurpakov (C36, Baran’, Belarus)
2017 Jan. 24.79 UT: m1=11.9, Dia.=1.7′, DC=6/; 40.0-cm L f/4.5 (75x); Seiichi Yoshida (Ibaraki, Japan)
2017 Jan. 24.20 UT: m1=10.6, Dia.=3′, DC=3/; 20-cm SCT (77x); Juan Jose Gonzalez (Collada de la Cobertoria, Asturias, Spain; Alt. 1190 m, 43º 09′ N, 5º 54′ W ) [ Sidgwick method. Tycho-2 comparison stars. SQM: 21.5 at zenith. Mountain location, very clear sky]
2017 Jan. 19.01 UT: m1=12.4, Dia.=0.70′, DC=6/, Tail=5.4′ in PA 320 deg.; 0.25-m f/4.7 reflector + CCD; Sergei Shurpakov (C36, Baran’, Belarus)
2017 Jan. 07.20 UT: m1=10.7, Dia.=3′, DC=3/; 20-cm SCT (77x); Juan Jose Gonzalez (Alto del Castro, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.5 at zenith. Mountain location, very clear sky]
2017 Jan. 07.07 UT: m1=12.3 CCD, Dia.=0.88′, DC=6/, Tail=5′ in PA: 314 deg.; 0.25-m f/4.7 reflector + CCD; S. Shurpakov (Observatory C36, Baran’, Belarus)
2017 Jan. 07.00 UT: m1=13.3 CCD, Dia.=0.6′, DC=2, Tail= 1′ in PA: 340 deg; 20-cm L+CCD; Danil Sidorko (Korenovsk, Russia)
2017 Jan. 06.19 UT: m1=11.3, dia.=1.3′, DC=4; 25.4-cm L f/5 (64x); Maik Meyer (Limburg, Germany)
2017 Jan. 05.252 UT: m1=10.1, Dia.=1.5′, DC=2; 20×80 B; Neil Norman (Ipswich, England)
2017 Jan. 01.22 UT: m1=10.8, Dia.=3′, DC=3/; 20-cm SCT (77x); Juan Jose Gonzalez (Puerto de las Señales, Leon, Spain; Alt. 1610 m, 43º 05′ N, 5º 14′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.7 at zenith. Mountain location, very clear sky]
2016 Dec. 30.20 UT: m1=11.5, Dia.=2.0′, DC=s7/, Tail= 0.08 deg. in PA: 225 deg.; 32-cm L f/5 (96x); Uwe Pilz (Leipzig, Germany)
2016 Dec. 30.14 UT: m1=11.8, Dia.=1.2’, DC=5; 60-cm L (77x); Sandor Szabo (Hungary) [Tail= 5’ to PA: 320 deg.]
2016 Dec. 29.22 UT: m1=11.8, Dia.=1.5′, DC=4; 25.4-cm L f/5 (64x); Maik Meyer (Limburg, Germany)
2016 Dec. 29.19 UT: m1=11.9, Dia.=1.0′, DC=7/, Tail= 0.08 deg. in PA: 330 deg.; 35-cm L (62x); Jakub Cerny (Senohraby, Czech Republic)
2016 Dec. 26.17 UT: m1=10.8, Dia.=3′, DC=3/; 20-cm SCT (77x); Juan José González (Les Retuertes – Sierra del Aramo, alt. 1350 m, Asturias, España; Alt. 1350 m, 43º 10′ N, 5º 54′ W) [Método Sidgwick. Estrellas de comparación Tycho-2. SQM zenital: 21.4. Condensación central cuasi-estelar : m2=13.0:(APASS). Cielo muy claro de montaña]
2016 Dic. 23.09 UT: m1=10.9, Dia=3′, DC=3, no cola; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2016 Dec. 11.09 UT: m1=12.8 CCD, Dia.=0.74′, DC=7/, Tail= 4′ in PA: 314 deg.; 0.25-m L f/4.7; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Dic. 10.23 UT: m1=10.8, Dia.=3′, DC=3; 20-cm SCT (77x); Juan José González (Les Retuertes – Sierra del Aramo, alt. 1350 m, Asturias, España) [Cielo muy claro de montaña]
2016 Dic. 06.22 UT: m1=10.6, Dia.=3′, DC=3/; 20-cm SCT (77x); Juan José González (Les Retuertes – Sierra del Aramo, alt. 1350 m, Asturias, España) [Condensación central cuasi-estelar : m2=12.9:(APASS). Cielo muy claro de montaña]
2016 Dic. 05.25 UT: m1=10.6, Dia.=4′, DC=3; 20-cm SCT (77x); Juan José González (Pico del Pozo de la Nieve – Sierra de la Bobia, alt. 1130 m, Asturias, España)
2016 Dec. 05.18 TU: m1=12.0, Dia.=1.5, DC=3/; 25.4-cm L f:5 (104x); Maik Meyer (Limburg, Germany)
2016 Dic. 03.11 UT: m1=10.8, Dia=4′, DC=2, no cola; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2016 Dec. 02.79 UT: m1=12.8, Dia.=1.5′, DC=7; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)
2016 Nov. 30.16 UT: m1=10.4, Dia.=5′, DC=2/; 20-cm SCT (77x); Juan José González (Les Retuertes – Sierra del Aramo, alt. 1350 m, Asturias, España) [Cielo muy claro de montaña]
2016 Nov. 29.19 TU: m1=12.2, Dia.=1.0′, DC=4; 25.4-cm L f:5 (104x); Maik Meyer (Limburg, Germany)
2016 Nov. 29.13 UT: m1=12.8, Dia.=0.7′, DC=5; 60-cm L (184x); Sandor Szabo (Hungary) [With 306x: droplike compact coma, bright false-nucleus and 2’ long tail to PA: 325 deg.]
2016 Nov. 28.20 TU: m1=12.2, Dia.=1.2′, DC=5; 25.4-cm L f:5 (104x); Maik Meyer (Limburg, Germany)
2016 Nov. 25.21 UT: m1=10.5, Dia.=5′, DC=2/; 20-cm SCT (77x); Juan José González (Sierra de Tineo, alt. 1040 m, Asturias, España) [Cielo muy claro de montaña]
2016 Nov. 25.12 UT: m1=11.1, Dia=3′, DC=2, no cola; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2016 Nov. 05.78 UT: m1=13.0, Dia.=1.1′, DC=4; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2016 Nov. 04.81 UT: m1=13.3, Dia.=1.5′, DC=5; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)
2016 Nov. 02.22 UT: m1=10.6, Dia.=4′, DC=2; 20-cm SCT (77x); Juan José González (Mallo de Luna, alt. 1120 m, León, España) [Cielo muy claro de montaña]

C/2015 V1 (PANSTARRS) c2015v1_mag
2017 Nov. 22.85 UT: m1=15.1, Dia.=0.6′, DC=3; 60-cm L (407x); Sandor Szabo (Hungary)
2017 Nov. 14.88 UT: m1={15, NEGATIVE, Dia.=20″; 0.40-m L f/4.4 (360x); Gabor Santa (Göd, Hungary) [comet was not seen, fainter than 15 magnitudes with 20″ diameter. 50 deg above horizon, nelm=5.0-5.2]
2017 Nov. 14.85 UT: m1=15.3, Dia.=0.3′, DC=5; 60-cm L (306x); Sandor Szabo (Hungary)
2017 Nov. 09.47 UT: m1=14.2, Dia.=0.4’, DC=2/3; 25-cm L f:5 (166x); Chris Wyatt (Walcha, NSW, Australia) [Very diffuse, visible in periods of good seeing. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Oct. 26.66 UT: m1=[14.4; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2017 Sep. 13.86 UT: m1=16.0 CCD, Dia.=0.24′, DC=7; 25-cm reflector f/4.7; Sergey Shurpakov (Baran’, Belarus)
2017 Aug. 26.81 UT: m1=15.6 CCD, Dia.=0.22′, DC=7; 25-cm reflector f/4.7; Sergey Shurpakov (Baran’, Belarus)
2017 July 31.00 UT: m1=16.5 CCD, Dia.=0.17′, DC=8; 25-cm reflector f/4.7; Sergey Shurpakov (Baran’, Belarus)
2016 Dec. 29.92 UT: m1=16.5, Dia.=0.15’, DC=7; 60-cm L (407x); Sandor Szabo (Hungary) [Motion was checked during 15 minutes period]
2016 Oct. 31.90 UT: m1=16.2, Dia.=0.15′, DC=4; 60-cm L (305x); Sandor Szabo (Sopron, Hungary) [Motion was checked during 20 minutes period]

C/2015 TQ209 (LINEAR) C2015TQ209_Mag
2016 Jan. 29.75 UT: m1=16.0, Dia.=0.25′, DC=4; 60.3-cm L (305x); Sandor Szabo (Sieggraben, Austria)

P/2015 TP200 (LINEAR) p2015tp200_mag
2017 Feb. 14.75 UT: m1=17.0 CCD, Dia.=0.59′, DC=8; 0.25m f/4.7 reflector + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2017 Jan. 18.75 UT: m1=16.7, Dia.=0.37′, DC=7/; 0.25-m f/4.7 reflector + CCD; Sergei Shurpakov (C36, Baran’, Belarus)
2017 Jan. 07.86 UT: m1=16.3 CCD, Dia.=0.66′, DC=7/; 0.25-m f/4.7 reflector + CCD; S. Shurpakov (Observatory C36, Baran’, Belarus)
2017 Jan. 06.91 UT: m1=16.1 CCD, Dia.=0.37′, DC=8; 0.25-m f/4.7 reflector + CCD; S. Shurpakov (Observatory C36, Baran’, Belarus)
2016 Dec. 10.96 UT: m1=17.2 CCD, Dia.=0.22′, DC=8/; 0.25-m L f/4.7; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Dec. 06.93 UT: m1=16.7 CCD, Dia.=0.37′, DC=8, Tail= 0.5’in PA: 268 deg.; 0.25-m L f/4.7; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Nov. 24.87 UT: m1=17.2 CCD, Dia.=0.15′, DC=7/; 0.25-m L f/4.7; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Sep. 10.08 UT: m1=18.1 CCD, Dia.=0.10′, DC=7/; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’,Belarus)
2016 Sep. 09.08 UT: m1=18.0 CCD, Dia.=0.16′, DC=8; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)

C/2015 Q1 (Scotti) C2015Q1_Mag
2015 Nov. 12.08 UT: m1=16.0, Dia.=0.2′, DC=3; 60.3-cm L (408x); Sandor Szabo (Sopron, Hungary) [Motion was checked]

C/2015 O1 (PANSTARRS) C2015O1_Mag
2017 Sep. 22.79 UT: m1=14.2, Dia.=0.3’, DC=5; 60-cm reflector (244x); Sandor Szabo (Sopron, Hungary)
2017 Aug. 21.85 UT: m1=14.3, Dia.=0.4′, DC=2/; 0.35-m L (351x); Gabor Santa (Hungary) [Coma is next to a 14.5 mag star, but very obvious. Moving was detected in a half an hour period]
2017 Aug. 14.47 UT: m1=14.1, Dia.=0.4’, DC=3; 25-cm L f:5 (166x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Aug. 10.38 UT: m1=14.3, Dia.=0.8’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very small and diffuse, visible in periods of good seeing. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 July 14.96 UT: m1=14.5, Dia.=0.2′, DC=7; 20-cm SCT (133x); Juan Jose Gonzalez (Alto del Castro – Aralla, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [In-focus method. APASS comparison stars. SQM: 21.6]
2017 June 30.62 UT: m1=14.7, Dia.=0.2’, DC=5/6; 25-cm L f:5 (166x); Chris Wyatt (Walcha, NSW, Australia) [Coma very small, just visible near mag 13.3 star. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 June 17.93 UT: m1=14.9 CCD, Dia.=0.26′, DC=8/, Tail=0.8′ in PA: 120 deg.; 25-cm reflector f/4.7; Sergey Shurpakov (Baran’, Belarus)
2017 May 26.95 UT: m1=14.8 CCD, Dia.=0.35′, DC=8; 25-cm reflector f/4.7; Sergey Shurpakov (Baran’, Belarus)
2016 Aug. 31.85 UT: m1=16.2, Dia.=0.1′, DC=5; 60-cm L (518x); Sandor Szabo (Hungary) [Motion was cheched during 20 minutes period]

C/2015 K1 (MASTER) C2015K1_Mag
2015 Oct. 03.54 UT: m1=16.2 CCD, Dia.=0.3′; [T31] 0.50-m f/6.8 astrograph + CCD + focal reducer; A. Novichonok & T. Prystavski (iTelescope observatory, Q62 remotely from Siding Spring, Australia)

C/2015 GX (PANSTARRS) C2015GX_Mag
2015 Nov. 12.11 UT: m1=16.0, Dia.=0.25′, DC=3; 60.3-cm L (305x); Sandor Szabo (Sopron, Hungary) [Motion was checked]

C/2015 G2 (MASTER) C2015G2_Mag
2015 Nov. 12.06 UT: m1=15.6, Dia.=0.3′, DC=3; 60.3-cm L (305x); Sandor Szabo (Sopron, Hungary)
2015 Oct. 13.49 UT: m1=15.7: CCD, Dia.=&0.5′, Tail=0.9′ in PA: 283 deg.; [T20] 0.1-m f/5.0 astrograph + CCD; A. Novichonok & T. Prystavski (iTelescope observatory, H06 remotely from Mayhill, U.S.A.)
2015 Oct. 11.77 UT: m1=14.5, Dia.=0.4′, DC=2; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)

C/2015 F4 (Jacques) C2015F4_Mag
2015 Nov. 11.84 UT: m1=14.2, Dia.=0.9′, DC=1; 60.3-cm L (244x); Sandor Szabo (Sopron, Hungary)
2015 Nov. 03.73 UT: m1=[12.5, negative; 20-cm L (222.2x); Artyom Novichonok (Konchezero station, Russia)
2015 Oct. 11.56 UT: m1=13.2, Dia.=0.9′, DC=5; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)
2015 Oct. 10.79 UT: m1=12.9, Dia.=0.8′, DC=2; 32.0-cm L f/5 (96x); Uwe Pilz (Leipzig, Germany)
2015 Oct. 05.84 UT: m1=12.4 DSLR, Dia.=2′, DC=2; Digital Reflex+0,3m lens; Giuseppe Pappa (Sicily, Italy)
2015 Oct. 03.09 UT: m1=12.7: CCD, Dia.=&1.2′, Tail=&1.6′ in PA: 121 deg.; [T20] 0.1-m f/5.0 astrograph + CCD; A. Novichonok & T. Prystavski (iTelescope observatory, H06 remotely from Mayhill, U.S.A.) [poor quality image: a lot of bad pixels and artefatcs visible]

C/2015 ER61 (PANSTARRS) C2015ER61_Mag
2017 Nov. 14.90 UT: m1=14.3, Dia.=0.6-0.7′, DC=0; 0.40-m L f/4.4 (360x); Gabor Santa (Göd, Hungary) [comet was seen well, round, without condensation. 59 deg above horizon, nelm=5.5]
2017 Nov. 14.86 UT: m1=13.5, Dia.=0.9′, DC=2; 60-cm L (244x); Sandor Szabo (Hungary)
2017 Oct. 27.97 UT: m1=13.3, Dia.=1,3′, DC=2-3; 0.40-m Dobsonian f/4.4 (200x); Gabor Santa (Göd, Hungary) [Very diffuse]
2017 Sep. 25.70 UT: m1=14.2, Dia.=0.6′, DC=1; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)
2017 Sep. 16.06 UT: m1=12.6, Dia=1′, DC=2, no tail; 20-cm SCT (120x); Carlos Labordena (Castellón, España)
2017 Sep. 03.00 UT: m1=12.5, Dia.=1′, DC=2/; 25-cm L (150x); Danil Sidorko (Korenovsk, Russia) [SQM = 21.65]
2017 Sep. 02.13 UT: m1=11.2, Dia=2′, DC=1, no tail; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2017 Sep. 01.07 UT: m1=10.8, Dia.=3′, DC=1/; 20-cm SCT (100x); Juan Jose Gonzalez (Alcuetas – Villabraz, Leon, Spain; Alt. 885 m, 42º 16′ N, 5º 27′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2017 Aug. 30.71 UT: m1=13.1, Dia.=1.1’, DC=2/3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Close to faint star. Coma diffuse, weak central condensation. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Aug. 25.17 UT: m1=10.6, Dia.=3′, DC=2; 20-cm SCT (100x); Juan Jose Gonzalez (Puerto del Pando – Prioro, Leon, Spain; Alt. 1430 m, 42º 56′ N, 4º 57′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.3]
2017 Aug. 21.08 UT: m1=10.5, Dia.=3′, DC=2; 20-cm SCT (100x); Juan Jose Gonzalez (Alto del Castro – Aralla, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2017 Aug. 21.04 UT: m1=14.7 CCD, Dia.=0.27′, DC=7; 25-cm reflector f/4.7; Sergey Shurpakov (Baran’, Belarus)
2017 Aug. 19.72 UT: m1=12.5, Dia.=1.5’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, on edge of Pleaides star cluster, close to star but distinguishable. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Aug. 19.00 UT: m1=12.1, Dia.=1′, DC=4; 0.60-m L (184x); Gabor Santa (Hungary) [Coma is so diffuse and round]
2017 Aug. 17.69 UT: m1=12.1, Dia.=1.2’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse. Comet on edge of Pleiades star cluster. Low altitude = 12.1°. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Aug. 17.02 UT: m1=10.2, Dia.=3.5′, DC=2/: 20-cm SCT (77x); (Alto del Castro – Aralla, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Before moonrise. Altitude: 17 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2017 Aug. 15.02 UT: m1=14.1 CCD, Dia.=0.48′, DC=7/, Tail=7.7′ in PA=268 deg.; 25-cm reflector f/4.7; Sergey Shurpakov (Baran’, Belarus)
2017 Aug. 12.77 UT: m1=10.7, Dia.=1.5′, DC=3/; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan) [Fading. Hard to see in the moon light. Near by Pleiades]
2017 Aug. 10.02 UT: m1=14.5 CCD, Dia.=0.35′, DC=7, Tail=3.7′ in PA=282 deg.; 25-cm reflector f/4.7; Sergey Shurpakov (Baran’, Belarus)
2017 Aug. 01.75 UT: m1=11.6, Dia.=3.8’, DC=4; 25-cm L f:5 (39x); (Chris Wyatt, Walcha, NSW, Australia) [Coma diffuse, brightening to centre, moderately condensed, does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 July 30.10 UT: m1=11.7, Dia=2.5′, DC=2, no tail; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2017 July 25.78 UT: m1=11.2, Dia.=3’, DC=3/4; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma enhances slightly in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 July 24.77 UT: m1=11.2, Dia.=2.8’, DC=3; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma enhances in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 July 23.12 UT: m1=10.0, Dia.=3.5′, DC=3/; 20-cm SCT (100x); Juan Jose Gonzalez (Alto del Castro – Aralla, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2017 July 05.80 UT: m1=9.6, Dia.=5.6’, DC=6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Faint tail visible, 20’ in length in P.A. 258°. Inner coma elongated and opaque. Small stellar central condensation. Fragment B not visible. Combined light observation. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 July 02.10 UT: m1=9.5, Dia.=4′, DC=4; 20-cm SCT (77x); Juan Jose Gonzalez (Alto del Castro – Aralla, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2017 June 30.75 UT: m1=9.7, Dia.=4.4’, DC=5; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Faint tail visible, traced to 20’ in length in P.A. 253°. Inner coma elongated in tail direction. Combined light from fragment B in coma although fragment B not visible. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 June 27.04 UT: m1=[8.7, NEGATIVE, Dia.=5′; 20×80 B; Marek Biely (244 m.a.s.l., Brno, Czech Republic) [Still too low to be seen. Fainter than 8.7 mag.]
2017 June 24.33 UT: m1=8.9, Dia.=4′, DC=3/; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 June 24.10 UT: m1=8.5, Dia=3′, DC=3, no tail; 8cm B (11x); Carlos Labordena (Castellón, España)
2017 June 22.76 UT: m1=9.3, Dia.=4.1’, DC=5; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Faint tail visible, 10.5’ in length in P.A. 260°; Coma dims slightly in Swan Band filter. Inner coma appears elongated to the South-West approximately, Fragment B just noticeable as a diffuse smudge behind the central condensation in the coma. Magnitude refers to total combined light of the pair. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 June 21.10 UT: m1=8.0, Dia.=4′, DC=4; 25×100 B; Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [Altitude: 14 deg. In 20 cm SCT(77x): m1=8.2, Dia.=3′, DC=4/, Tail: 0.2 deg. in PA 260 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2017 June 02.32 UT: m1=8.5:; 10-cm R (34x); Willian Souza (Sao Paulo, Brazil)
2017 May  26.32 UT: m1=8.0, Dia.=5′, DC=5; 8-cm R (26x); Willian Souza (Sao Paulo, Brazil)
2017 May  24.12 UT: m1=7.9, Dia.=4′, DC=5; 25×100 B; Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [In 20 cm SCT(77x): tail 0.4-deg in PA 260 deg. Beginning of astronomical twilight. Sidgwick method. Tycho-2 comparison stars. Altitude: 9 deg. SQM: 20.8. Mountain  location, very clear sky]
2017 May  08.30 UT: m1=7.7, Dia.=5′, DC=5; 15×70 B; Willian Souza (Sao Paulo, Brazil)
2017 May  07.76 UT: m1=7.9, Dia.=6.0′, Tail= 0.2 degrees PA= 255 deg.; 25×100 B; David A. J. Seargent (Cowra, NSW, Australia) [Marginally enhanced using Swan Band filter]
2017 May  07.35 UT: m1=7.6, Dia.=6′, DC=4/; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Haze]
2017 May  06.77 UT: m1=7.8, Dia.=8.5’, DC=6; 7×50 B; Chris Wyatt (Walcha, NSW, Australia) [Star-like central condensation surrounded by a diffuse haze, appears clircular. Strongly enhances in Swan Band filter. Slight interference from zodiacal light and glare from Venus. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 May  06.21 UT: m1=7.9, Dia.=4′, DC=5, no tail; 8-cm B (11x); Carlos Labordena (Castellón, España)
2017 May  04.75 UT: m1=7.8, Dia.=5′, DC=5; 40.0-cm L f/4.5 (36x); Seiichi Yoshida (Gunma, Japan)
2017 May  03.15 UT: m1=7.5, Dia.=5′, DC=5; 25×100 B; Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [In 20 cm SCT(77x): tail 0.6-deg in PA: 250 deg. Beginning of astronomical twilight. Sidgwick method. Tycho-2 comparison stars. Altitude: 9 deg. SQM: 21.5 at zenith. Mountain  location, very clear sky]
2017 Apr. 30.31 UT: m1=7.4, Dia.=6′, DC=5; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Apr. 28.77 UT: m1=7.8, Dia.=8.2’, DC=6; 7×50 B; Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, stellar centre enhances strongly in Swan Band filter. Tail visible, in 10”f/5 dob at x39, and traced to 23.5’ in length in P.A. 253°. Slight interference by zodiacal light. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Apr. 28.16 UT: m1=7.4, Dia.=5′, DC=5; 10×50 B; Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W)  [In 20 cm SCT(77x): tail 0.5-deg in PA: 250 deg. Beginning of astronomical twilight. Sidgwick method. Tycho-2 comparison stars. Altitude: 10 deg. SQM: 21.4 at zenith. Mountain  location, very clear sky]
2017 Apr. 26.33 UT: m=7.6, Dia.=6′, DC=5, … 15x70B … Willian Souza (Sao Paulo, Brazil)
2017 Apr. 25.09 UT: m1=7.7, Dia.=8′, DC=3; 25×100 B; Martin Lehky (Czech Republic) [Morris Method]
2017 Apr. 24.17 UT: m1=7.4, Dia=4′, DC=5, no tail; 8-cm B (11x); Carlos Labordena (Castellón, España)
2017 Apr. 22.29 UT: m1=7.5, Dia.= 5′, DC=4; 9.0-cm-R f/5.5 (33x); Willian Souza (Sao Paulo, Brazil)
2017 Apr. 22.29 UT: m1=7.4, Dia.=4′, DC=5; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Moonlight / clouds]
2017 Apr. 21.17 UT: m1=7.0, Dia.=5′, DC=5; 25×100 B; Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m,  42º 54′ N, 5º 48′ W) [Astronomical twilight. Moonlight interference. Sidgwick method. Tycho-2 comparison stars. Altitude: 12 deg. SQM: 21.0 at zenith. Mountain  location, very clear sky]
2017 Apr. 19.34 UT: m=7.1, Dia.=8′, DC=4; 15×70 B; Willian Souza (Sao Paulo, Brazil)
2017 Apr. 16.27 UT: m1=6.9, Dia.=7′, DC=4/; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Moonlight / clouds]
2017 Apr. 15.25 UT: m1=6.7, Dia.= 8′, DC=4; 7×50 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Moonlight / comet altitude: 11º]
2017 Apr. 10.34 UT: m1=6.5, Dia.=12′, DC=4/; 7×50 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Moonlight / clouds]
2017 Abr. 08.36 UT: m1=6.2, Dia.=12´, DC=6/; 25-cm f/4.5 L (66X); Gonzalo Vargas (Cochabamba, Bolivia) [Cola= 0.22 grados PA: 264 grados; con 66 aumentos y un filtro SkyGlow pude apreciar la fina cola que es más brillante cerca del borde de la coma del cometa]
2017 Apr. 08.19 UT: m1=6.5, Dia.=25′, DC=3; 20×80 B; J. P. Navarro Pina / Manuel Hernandez (Puerto Cadena, Murcia, Spain) [Comet very condensed and bright , altitude 400 mts]
2017 Apr. 07.18 UT: m1=7.1, Dia.=4′, DC=6, no tail; 8-cm B(11x); Carlos Labordena (Castellón, España)
2017 Apr. 07.18 UT: m1=6.2, Dia.=8′, DC=5/; 10×50 B; Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m,  42º 54′ N, 5º 48′ W) [In evolution after the recent outburst. The comet shows a wider coma diameter and brighter m1 estimate in comparison with my previous Apr. 4.17 observation. Sidgwick method. Tycho-2 comparison stars. Altitude: 12 deg. SQM: 21.4 at zenith. Mountain  location, very clear sky]
2017 Apr. 05.80 UT: m1=6.2, Dia.=8’, DC=5; 8×40 B; Michael Mattiazzo (Swan Hill, Vic, Australia) [Clearly in outburst, 2 orders of magnitude brighter than 48 hours ago. Through 25x100mm binoculars, coma appears evenly bright and an ion tail at least 30’ long in PA 255 has developed]
2017 Apr. 05.74 UT: m1=6.4, Dia.=7.3’, DC=6/7; 7×50 B; Chris Wyatt (Walcha, NSW, Australia) [In outburst; Inner coma bright and aqua-blue in colour, enhances strongly in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Apr. 05.35 UT: m1=6.2, Dia.=7′, DC=6/, Tail= 0.7º PA: 255 deg.; 7×50 B: Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Apr. 05.34 UT: m1=6.4, Dia.=6′, DC=7, Tail= 0.7º PA: 255 deg.; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Abr. 05.33 UT: m1=6.4, Dia.=10´, DC=6; 25-cm f/4.5 L (66x); Gonzalo Vargas (Cochabamba, Bolivia) [Cola=0.3 grados en PA: 262 grados; con 132 aumentos pude apreciar cierto tipo de filamentos saliendo de la parte central en forma de abanico]
2017 Apr. 04.17 UT: m1=7.4, Dia.=4′, DC=6; 10×50 B; Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m,  42º 54′ N, 5º 48′ W) [Possible outburst. The comet shows a higher DC, appearing significantly brighter than expected in comparison with my previous Apr. 1.18 observation. Sidgwick method. Tycho-2 comparison stars. SQM: 21.5 at zenith. Altitude: 9 deg. In 20 cm SCT(77x): m2=10.5: (Tycho-2). Dust tail 0.2-deg in PA 260 deg.  Mountain  location, very clear sky]
2017 Apr. 03.80 UT: m1=8.3, Dia.=5’, DC=4; 25×100 B; Michael Mattiazzo (Swan Hill, Vic, Australia) [short dust tail 10’ in PA 255]
2017 Apr. 03.73 UT: m1=8.6, Dia.=4’, DC=6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Faint tail traced to 29’ in length in P.A. 253° approximately; coma centre stellar and aqua-blue in colour. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Apr. 02.28 UT: m1=8.4, Dia.=6′, DC=5, Tail= 0.3º PA: 260 deg.; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Apr. 02.18 UT: m1=8.8, Dia.=3.5′, DC=4, no tail; 20-cm SCT(50x); Carlos Labordena (Castellón, España)
2017 Apr. 02.10 UT: m1=[7.0, NEGATIVE; 20×80 B; Marek Biely (Brno, Czech Republic, 244 m.a.s.l.) [Impossible to see in these altitudes. Fainter than 7.0 mag.]
2017 Apr. 01.85 UT: m1=8.3, Dia.=6′, DC=5; 10-cm f/4 L (20x); Andrew Pearce (Bailup, W. Australia) [tail observed in 20cm L, 16′ long in PA 258 deg.  Comet seems to have faded a reasonable amount in 24 hrs, sky conditions the same between both mornings]
2017 Apr. 01.71 UT: m1=8.1, Dia.=6.8’, DC=4; 11×70 B; Chris Wyatt (Walcha, NSW, Australia) [Diffuse coma, moderately condensed centre, enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Apr. 01.18 UT: m1=8.2, Dia.=6′, DC=3; 25×100 B; Juan Jose Gonzalez (Candanedo de Fenar, Leon, Spain; Alt. 1060 m, 42º 49′ N, 5º 34′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.4 at zenith. Altitude: 10 deg. Mountain location, very clear sky]
2017 Mar. 31.84 UT: m1=7.6 Dia.=10′, DC=4; 10-cm f/4 L (20x); Andrew Pearce (Bailup, W. Australia) [tail observed in 20cm L, 35′ long in PA 263 deg.]
2017 Mar. 30.33 UT: m1=8.5, Dia.=6′, DC=5, Tail= 0.3º PA: 260 deg.; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Mar. 29.33 UT: m1=8.5, Dia.=6′, DC=5, Tail= 0.3º PA: 260 deg.; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Mar. 28.19 UT: m1=8.7, Dia.=4′, DC=3; 25×100 B; Juan Jose Gonzalez (Collado del Fresno, Asturias, Spain; Alt. 1280 m, 43º 10′ N, 5º  54′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.5 at zenith. Altitude: 12 deg. In 20 cm SCT(77x): Dust tail 0.2-deg in p.a. 260 deg. Mountain location, very clear sky]
2017 Mar. 28.17 UT: m1=9.0, Dia.=3′, DC=4, no tail; 20-cm SCT(50x); Carlos Labordena (Castellón, España)
2017 Mar. 27.71 UT: m1=9.0, Dia.=3.6’, DC=5; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Faint tail visible, approximately 16.5’ in length in P.A. 259°. Coma enhances in Swan Band filter. Inner coma opaque. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Mar. 25.78 UT: m1=8.6, Dia.=5’, DC=4; 25×100 B; Michael Mattiazzo (Swan Hill, Vic, Australia)
2017 Mar. 25.33 UT: m1=9.5, Dia.=5′, DC=4/; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil) [enhanced image with Swan band filter]
2017 Mar. 24.84 UT: m1=8.9 Dia.=5.5′, DC=4; 10-cm f/4 L (20x); Andrew Pearce (Bailup, W. Australia)
2017 Mar. 09.23 UT: m1=9.1, Dia.=5′, DC=2; 25×100 B; Juan Jose Gonzalez (Cea, Leon, Spain; Alt. 880 m, 42º 28′ N, 5º  0′ W) [Sidgwick method. Tycho-2 comparison stars. Altitude: 16 deg. Astronomical twilight. Rural dark sky location, clear sky. Mar. 9.22 : In 20 cm SCT (77x) : m1=9.3, elongated coma. SQM: 21.3 at zenith]
2017 Mar. 08.68 UT: m1=10.4, Dia.=2.3’, DC=4; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Faint tail visible, approximately 5’ in length in P.A. 272°. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Mar. 06.69 UT: m1=10.0, Dia.=2.8’, DC=4; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Short faint tail visible, 5.4’ in length in P.A. 235°; transparent coma enhances in Swan Band filter. Slight interference by star in coma, approximately 1’ from the central condensation. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Mar. 03.80 UT: m1=10.7, Dia.=1.1′, DC=3/; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Ibaraki, Japan)
2017 Feb. 28.31 UT: m1=11.3, Dia.=1′, DC=3; 22-cm L (160x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Feb. 23.67 UT: m1=10.9, Dia.=3’, DC=4; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Faint tail visible, 3.6’ in length in P.A. 286° approximately. Coma enhances well in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Feb. 21.21 UT: m1=9.5, Dia.=4′, DC=2; 20-cm SCT (77x); Juan Jose Gonzalez (Alto de la Camperona, Leon, Spain; Alt. 1600 m, 42º 51′ N, 5º 12′ W) [Sidgwick method. Tycho-2 comparison stars. Very faint and diffuse outer coma. Altitude: 14 deg. Field stars checked in DSS. Some moonlight interference. Mountain location, very clear sky]
2017 Feb. 20.67 UT: m1=11.0, Dia.=1.4’, DC=2/3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Moonlight; Enhances slightly in Swan Band filter, opaque centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Feb. 17.68 UT: m1=11.0, Dia.=1.4’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Moonlight. Slightly enhances in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Feb. 06.81 UT: m1=11.4, Dia.=1.2′, DC=3; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Ibaraki, Japan)
2017 Feb. 01.71 UT: m1=11.2, Dia.=2.5’, DC=5/; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Outer coma very diffuse, brightening to a moderately condensed inner coma with a sometimes stellar central condensation. Coma slightly elongated to the West. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Jan. 31.70 UT: m1=11.5, Dia.=1.2’, DC=5; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Outer coma diffuse, elongated to West approximately. Gradual brightening to a small and opaque but moderately condensed centre, faintly stellar in good seeing. [Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Jan. 30.71 UT: m1=12.0, Dia.=1’, DC=4; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma appears slightly elongated to the West approximately, transparent outer coma brightening to a moderately condensed and opaque centre. Does not enhance in Swan Band filter. Bright star of mag 7.8 (Tycho-2) 2.1’ away in P.A. 146°. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Jan. 29.70 UT: m1=12.0, Dia.=1.1’, DC=3/; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Outer coma diffuse and transparent, brightening slightly to centre. Coma slightly elongated to the West approximately. Does not enhance in Swan Band filter. Close to mag 12.2 star 0.2’ away in P.A. 0.3°. At x166 the inner coma appears small and opaque. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Jan. 28.18 UT: m1=11.4, Dia.=2′, DC=3; 33-cm L (67x); Piotr Guzik (Koskowa Góra, Poland; Alt. 800 m, 49º 45′ N, 19º 47′ E) [Sidgwick method. APASS comparison stars. Low altitude: ~12 deg. Exceptional transparency, limiting stellar magnitude in comets vicinity ~15.0 mag. SQM: 20.9 at zenith]
2017 Jan. 24.83 UT: m1=12.2, Dia.=1.1′, DC=3/; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Ibaraki, Japan)
2017 Jan. 24.22 UT: m1=9.3, Dia.=6′, DC=1; 20-cm SCT (77x); Juan Jose Gonzalez (Collada de la Cobertoria, Asturias, Spain; Alt. 1190 m, 43º 09′ N, 5º 54′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.5 at zenith. Very faint and diffuse outer coma. Altitude: 13 deg. Field stars checked in DSS. Several stars in coma, the brightest being mag 12.5 (GSC). Mountain location, very clear sky]
2017 Jan. 23.69 UT: m1=12.5, Dia.=1’; DC=2/; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Moonlight; Coma diffuse, slight brightening to centre. No enhancement in Swan Band filter. Motion detected after 15 mins. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Jan. 07.21 UT: m1=10.1, Dia.=4.5′, DC=1/; 20-cm SCT (77x); Juan Jose Gonzalez (Alto del Castro, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.5 at zenith. Very faint and diffuse outer coma. Altitude: 11 deg. Zodiacal light. Field stars checked in DSS. Mountain location, very clear sky]
2017 Jan. 01.25 UT: m1=10.2, Dia.=4.5′, DC=1/; 20-cm SCT (77x); Juan Jose Gonzalez (Puerto de las Señales, Leon, Spain; Alt. 1610 m, 43º 05′ N, 5º 14′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.7 at zenith. Very faint and diffuse outer coma. Altitude: 17 deg. Zodiacal light. Field stars checked in DSS. Mountain location, very clear sky]
2016 Dec. 30.20 UT: m1=13.9, Dia.=0.6’, DC=4; 60-cm L (305x); Sandor Szabo (Hungary)
2016 Dec. 29.72 UT: m1=13.0, Dia.=0.6’, DC=2/; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma small and diffuse, difficult to see due to zodiacal light and twilight interference. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2016 Dec. 29.22 UT: m1=13.3, Dia.=1.2′, DC=5; 35-cm L (178x); Jakub Cerny (Senohraby, Czech Republic)
2016 Dec. 26.52 UT: m1=13.6, Dia.=0.7′, DC=5; 41-cm L (229x); Alan Hale (Cloudcroft, USA) [The coma is somewhat “dense” but is not really “condensed.”]
2016 Dec. 26.25 UT: m1=11.2, Dia.=2.5′, DC=1/; 20-cm SCT (133x); Juan José González (Les Retuertes – Sierra del Aramo, alt. 1350 m, Asturias, España; Alt. 1350 m, 43º 10′ N, 5º 54′ W) [Método Sidgwick. Estrellas de comparación Tycho-2. Muy débil y difusa coma externa. Altura sobre el horizonte: 16º. Alguna interferencia de la luz lunar. Estrellas de campo comprobadas en el DSS. Magnitud límite estelar en la zona del cometa: 13.9 (APASS). Cielo muy claro de montaña]
2016 Dic. 23.23 UT: m1=12.2, Dia=1′, DC=1, no cola; 20-cm SCT (118x); Carlos Labordena (Castellón, España)
2016 Dic. 10.25 UT: m1=10.3, Dia.=3′, DC=1/; 20-cm SCT (100x); Juan José González (Les Retuertes – Sierra del Aramo, alt. 1350 m, Asturias, España) [Muy débil y difusa coma externa. Altura sobre el horizonte: 14º. Estrellas de campo comprobadas en el DSS. Magnitud límite estelar en la zona del cometa: 13.5 (APASS) – 14.0 (GSC). Cielo muy claro de montaña]
2016 Dec. 06.25 UT: m1=10.4, Dia.=2.5′, DC=2; 20-m SCT (100x); Juan José González (Les Retuertes – Sierra del Aramo, alt. 1350 m, Asturias, España ) [ Débil y difusa coma externa. Altura sobre el horizonte : 13º. Estrellas de campo comprobadas en el DSS. Magnitud límite estelar en la zona del cometa : 13.5 (APASS). Cielo muy claro de montaña]

C/2015 D3 (PANSTARRS) c2015d3_mag
2017 Jan. 25.94 UT: m1=18.6 CCD, Dia.=0.37′, DC=9; 0.25-m f/4.7 reflector + CCD; Sergei Shurpakov (C36, Baran’, Belarus)

C/2014 W11 (PanSTARRS) C2014W11_Mag
2016 May  11.02 UT: m1=14.8, Dia.=0.3′, DC=3; 60.0-cm L (141x); Sandor Szabo (Hakos, Namibia)
2016 Apr. 30.97 UT: m1=15.5, Dia.=0.3′, DC=6; 40.0-cm L (225x); Sandor Szabo (Hakos, Namibia)
2016 Jan. 09.85 UT: m1=[14.0; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Ibaraki, Japan)

C/2014 W2 (PANSTARRS)  C2014W2_Mag
2016 Sep. 01.45 UT: m1=14.0, Dia.=0.6′, DC=2; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2016 Aug. 30.84 UT: m1=14.1, Dia.=0.6′, DC=6; 35-cm L (178x); Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 28.86 UT: m1=14.1, Dia.=0.3′, DC=6; 35-cm L (178x); Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 28.83 UT: m1=14.4, Dia.=0.7′, DC=3; 30-cm L, f/5 (167x); Mieczyslaw Leszek Paradowski (Dąbrowa, Poland)
2016 Aug. 27.85 UT: m1=14.3, Dia.=0.3′, DC=7; 35-cm L (178x); Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 27.81 UT: m1=13.7, Dia.=0.7′, DC=1; 60-cm L (244x); Sandor Szabo (Hungary)
2016 Aug. 26.85 UT: m1=14.0, Dia.=0.63′, DC=3; 30-cm L, f/5 (167x); Mieczyslaw Leszek Paradowski (Dąbrowa, Poland)
2016 Aug. 24.83 UT: m1=13.9, Dia.=1.2′, DC=4; 35-cm L (178x); Jakub Černý (Senohraby, Czech Republic)
2016 Ago. 11.00 UT: m1=12.4, Dia.=1.5′, DC=4; 20-cm SCT (100x); Juan José González (Alto del Trichero, alt. 1190 m, León, España) [Estrellas de comparación de la fotometría APASS]
2016 Ago. 01.92 UT: m1=12.5, Dia.=1.5′, DC=5; 20-cm SCT (77x); Juan José González (Cueto Rosales, alt. 1420 m, León, España)
2016 July 31.38 UT: m1=13.7, Dia.=1’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, no tail, low altitude = 18.7°]
2016 July 28.36 UT: m1=13.5, Dia.=0.8’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, no tail. Low altitude = 18.0°]
2016 July 27.92 UT: m1=12.6, Dia.=1.5′, DC=5; 20-cm SCT (77x); Juan José González (Alto del Castro, alt. 1720 m, León, España) [Estrellas de comparación de la fotometría APASS]
2016 July 27.89 UT: m1=14.2 CCD, Dia.=0.89′, DC=7/; 0.15-m L f/3.2; Sergey Shurpakov (Baran’, Belarus
2016 July 25.37 UT: m1=13.6:, Dia.=0.6’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Magnitude uncertain due to proximity to mag 12.9 star 0.3’away in P.A. 227°. No tail; Low altitude = 16.5°]
2016 July 23.38 UT: m1=13.6, Dia.=0.8’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, no tail. Low altitude = 15.4°. Very windy conditions]
2016 July 10.88 UT: m1=14.6 CCD, Dia.=0.73′, DC=4/; 0.15-m L f/3.2 +CCD; Sergey Shurpakov (Baran’,Belarus)
2016 July 08.99 UT: m1=12.5, Dia.=2.0′, DC=4; 20-cm SCT (77x); Juan José González (Cueto Rosales, alt. 1420 m, León, España) [Estrellas de comparación de la fotometría APASS]
2016 July 05.87 UT: m1=14.7 CCD, Dia.=0.42′, DC=4/; 0.15-m L f/3.2 +CCD; Sergey Shurpakov (Baran’,Belarus)
2016 July 02.97 UT: m1=12.5, Dia.=2.0′, DC=5; 20-cm SCT (77x); Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España) [Estrellas de comparación de la fotometría APASS]
2016 June 27.99 UT: m1=12.7, Dia.=1.5′, DC=6; 20-cm SCT (77x); Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España) [Estrellas de comparación de la fotometría APASS cercana al cometa]
2016 June 25.95 UT: m1=14.7 CCD, Dia.=0.54′, DC=4/; 0.20-m L+CCD; Sergey Shurpakov (A98, Baran’,Belarus)
2016 June 25.83 UT: m1=14.1 CCD, Dia.=1.4′, DC=4; 20-cm L+CCD; Danil Sidorko (Korenovsk, Russia)
2016 June 23.89 UT: m1=14.8 CCD, Dia=0.39′, DC=4/; 0.20-m L+CCD; Sergey Shurpakov (A98, Baran’,Belarus)
2016 June 23.83 UT: m1=14.4 CCD, Dia.=1′, DC=4; 20-cm L+CCD; Danil Sidorko (Korenovsk, Russia)
2016 June 12.91 UT: m1=14.1 CCD, Dia.=0.57′, DC=7/; 15-cm L+CCD; Sergey Shurpakov (C36, Baran’,Belarus)
2016 June 07.98 UT: m1=12.4, Dia.=2′, DC=3/; 31-cm C f/9 (68x); Martin Lehky ((Hradec Kralove, Czech Republic)
2016 June 06.98 UT: m1=12.4, Dia.=2′, DC=3/; 31-cm C f/9 (68x); Martin Lehky ((Hradec Kralove, Czech Republic)
2016 June 06.84 UT: m1=13.2, Dia.=0.7′, DC=4; 25.5-cm L (120x); Danil Sidorko (Korenovsk, Russia)
2016 June 05.82 UT: m1=13.3, Dia.=0.5′, DC=3; 25.5-cm L (120x); Danil Sidorko (Korenovsk, Russia)
2016 June 03.87 UT: m1=12.6 DSRL, Dia.=1.5′; 1100d+300mm lens; Giuseppe Pappa (Mascalucia, Sicily, Italy)
2016 June 03.83 UT: m1=13.5 CCD, Dia.=1′, DC=4; 20-cm L+CCD; Danil Sidorko (Korenovsk, Russia)
2016 June 03.51 UT: m1=13.1, Dia.=1.6′, DC=6; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan) Fórmula Preperihélica: m = -5.7 + 5 log d + 40.4 log r / Fórmula Postperihélica m = 3.7 + 5 log d + 11.0 log r

Curva de Luz Visual Pre y Post perihélica del C/2014 S2 (PANSTARRS). Magnitud Heliocéntrica (Helio Mag) versus Distancia al Sol (r) sobre observaciones aportadas a la Sección Cometaria de la LIADA. Fórmula Preperihélica: m = -5.7 + 5 log d + 40.4 log r / Fórmula Postperihélica m = 3.7 + 5 log d + 11.0 log r

C/2014 S2 (PANSTARRS) C2014S2_Mag
2016 July 28.36 UT: m1=13.8, Dia.=0.9’, DC=2; 25cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very small and diffuse, difficult due to seeing conditions. No tail, zodiacal light interference]
2016 July 25.36 UT: m1=13.9, Dia.=0.7’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [No tail, difficult due to seeing conditions, slightly breezy. Coma very diffuse. Bright star just out of field]
2016 July 23.37 UT: m1=12.9, Dia.=1.8’, DC=2/; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, brightening to weakly condensed centre. Very windy conditions]
2016 July 08.93 UT: m1=10.7, Dia.=5′, DC=2/; 20-cm SCT (77x); Juan José González (Cueto Rosales, alt. 1420 m, León, España)
2016 July 02.95 UT: m1=10.7, Dia.=5′, DC=2; 20-cm SCT (77x); Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España)
2016 July 02.36 UT: m1=11.8, Dia.=3.1’, DC=2/; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, does not enhance in Swan Band filter. Outer coma semi-transparent, brightening to a slightly more opaque centre, circular in appearance. Slight interference from zodiacal light. No tail]
2016 July 01.91 UT: m1=11.3, Dia.=3′, DC=3, no cola; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2016 June 27.94 UT: m1=10.7, Dia.=5′, DC=2/; 20-cm SCT (77x); Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España)
2016 June 12.87 UT: m1=14.4 CCD, Dia.=0.43′, DC=8; 15-cm L+CCD; Sergey Shurpakov (C36, Baran’,Belarus)
2016 June 09.81 UT: m1=13.8 CCD, Dia.=0.8′, DC=2, Tail= 2.5′ in RA: 70 deg.; 20-cm L +CCD; Danil Sidorko (Korenovsk, Russia)
2016 June 08.87 UT: m1=12.0, Dia=1′, DC=1; 30.5-cm L f/4.9 (93x); J. P. Navarro Pina (El Ardal, Mula, Murcia, Spain) [553 mts, Lm=5.8]
2016 June 08.35 UT: m1=11.6, Dia.=2.7’, DC=3; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Moonlight; Coma diffuse with slightly more opaque centre, no tail. Does not enhance in Swan Band filter]
2016 June 07.93 UT: m1=11.7, Dia.=2′, DC=3; 31-cm C (68x); Martin Lehky ((Hradec Kralove, Czech Republic)
2016 June 06.93 UT: m1=11.5, Dia.=2′, DC=3; 31-cm C (68x); Martin Lehky ((Hradec Kralove, Czech Republic)
2016 June 06.88 UT: m1=[11.0 NEGATIVE, Dia.=2.1′; 20×80 B; Marek Biely (Brno, Czech Republic) [Already not seen. Fainter than 11.0 mag. Slight interference of astronomical twilight]
2016 June 06.83 UT: m1=11.0, Dia.=3.5′, DC=3; 25.5-cm L (120x); Danil Sidorko (Korenovsk, Russia)
2016 June 05.81 UT: m1=10.9, Dia.=4′, DC=3; 25.5-cm L (120x); Danil Sidorko (Korenovsk, Russia)
2016 June 04.95 UT: m1=10.8, Dia.=3′, DC=3, no cola; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2016 June 03.86 UT: m1=10.5 DSRL, Dia.=3′; 1100d+300mm lens; Giuseppe Pappa (Mascalucia, Sicily, Italy)
2016 June 03.85 UT: m1=10.8, Dia.=4′, DC=2; 30.5-cm L (93x); J. P. Navarro Pina (Mula, Murcia, Spain)
2016 June 03.49 UT: m1=11.8, Dia.=2.3′, DC=4; 40.0-cm L f/4.5 (75x); Seiichi Yoshida (Gunma, Japan)
2016 June 01.01 UT: m1=10.4, Dia.=5′, DC=3; 20-cm SCT (77x); Juan José González ( Alto del Castro – Aralla, alt. 1720 m, León, España)
2016 May  30.35 UT: m1=11.3, Dia.=3’, DC=3/; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma elongated to the East, inner coma opaque surrounded by a semi-transparent outer coma. Does not enhance in Swan Band filter]
LC_2014Q2_LIADA_2015Nov17C/2014 Q2 (Lovejoy) C2014Q2_Mag
2015 Nov. 16.80 UT: m1=11.5, Dia.=1.5′, DC=1; 30,5-cm L f/4.9 (120x); J. P. Navarro Pina (El Ardal Bullas 550 mts , Murcia , Spain)
2015 Nov. 07.758 UT: m1=10.7, Dia.=2′, DC=2; 11.4-cm L f/8 (45x); Neil Norman (Ipswich, England)
2015 Nov. 03.66 UT: m1=[11.4, negative; 20-cm L (153.8x); Artyom Novichonok (Konchezero station, Russia)
2015 Nov. 02.76 UT: m1=10.6, Dia.=3.5′, DC=1; 32.0-cm L f/5 (96x); Uwe Pilz (Leipzig, Germany)
2015 Oct. 15.79 UT: m1=11.5: CCD, Dia.=&2.9′; [T16] 0.15-m f/7.3 refractor + CCD; A. Novichonok & T.Prystavski (AstroCamp Observatory, I89 (remotely from Nerpio, Spain))
2015 Oct. 10.78 UT: m1=10.7, Dia.=3.0′, DC=3; 32-cm L f/5 (96x); Uwe Pilz (Leipzig, Germany)
2015 Oct. 09.81 UT: m1=11.2, Dia.=3′, DC=2, no cola; 20-cm B (50x); Carlos Labordena (Castellón, España)
2015 Oct. 06.74 UT: m1=11.5 DSLR, Dia.=2′, DC=2; Digital Reflex+0,3m lens; Giuseppe Pappa (Sicily, Italy)
2015 Oct. 03.09 UT: m1=11.3: CCD, Dia.=&2.9′; [T20] 0.1-m f/5.0 astrograph + CCD; A. Novichonok & T. Prystavski (iTelescope observatory, H06 remotely from Mayhill, U.S.A.) [poor quality image: a lot of bad pixels and artefatcs visible]
2015 Oct. 01.86 UT: m1=10.7, Dia.=4′, DC=2/; 20-cm SCT (77x); Juan José González (Alto del Castro, alt. 1720 m, León, España) [Estrella de mag. 12.4 (APASS) en la coma]

C/2014 Q1 (PANSTARRS) C2014Q1_Mag
2015 Oct. 03.41 UT: m1=12.9, Dia.=1’, DC=1/2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, very weakly condensed. No tail. Low altitude = 17.4°]

C/2014 OE4 (PANSTARRS) C2014OE4_Mag
2016 Aug. 31.81 UT: m1=16.5, Dia.=0.1′, DC=7; 60-cm L (659x); Sandor Szabo (Hungary) [Very small, checked in DSS]
2016 July 27.93 UT: m1=16.0 CCD, Dia.=0.33′, DC=8/; 0.15-m L  f/3.2 +CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 May  05.87 UT: m1=17.3 CCD, Dia.=0.13′, DC=7/; 25-cm L+CCD; Sergey Shurpakov (Baran’,Belarus)
2016 Apr. 30.90 UT: m1=17.2 CCD, Dia.=0.18′, DC=8; 0.25-m L+CCD; Sergey Shurpakov (Baran’, Belarus)
2016 Apr. 29.92 UT: m1=17.4 CCD, Dia.=0.16′, DC=8/; 0.25-m L+CCD; Sergey Shurpakov (Baran’, Belarus)

C/2014 N3 (NEOWISE) C2014N3_Mag
2015 Nov. 11.91 UT: m1=15.1, Dia.=0.4′, DC=3; 60.3-cm L (305x); Sandor Szabo (Sopron, Hungary)
2015 Oct. 07.88 UT: m1=14.1: CCD, Dia.=0.6′, Tail=2.1′ in PA: 182 deg.; [T16] 0.15-m f/7.3 refractor + CCD; A. Novichonok & T. Prystavski (AstroCamp Observatory, I89 remotely from Nerpio, Spain)

C/2014 B1 (Schwartz) c2014b1_mag
2017 Mar. 28.88 UT: m1=15.6 CCD, Dia.=0.47′; 15-cm L + CCD + V filter, f/4; Mieczyslaw Leszek Paradowski (Lublin, Poland)
2017 Mar. 28.84 UT: m1=15.0 CCD, Dia.=0.47′; 15-cm L + CCD + Rc filter, f/4; Mieczyslaw Leszek Paradowski (Lublin, Poland)
2017 Mar. 26.87 UT: m1=15.7, Dia.=0.4′, DC=2; 60-cm L (306x); Sandor Szabo (Hungary)
2016 Dec. 30.06 UT: m1=15.7, Dia.=0.25’, DC=3; 60-cm L (407x); Sandor Szabo (Hungary)

 

Curva de Luz (Mag. heliocéntrica vs Log R) Visual del Cometa C/2014 E2 (Jacques) al 9 de Mayo de 2015. / H0: 6.8, n: 4.2 / LIADA Sección Cometas.

C/2014 E2 (Jacques) Curva de Luz (Mag. heliocéntrica vs Log R) Visual del Cometa C/2014 E2 (Jacques) al 9 de Mayo de 2015. / H0: 6.8, n: 4.2 / LIADA Sección Cometas.

C/2014 A4 (SONEAR) C2014A4_Mag
2016 Sep. 02.87 UT: m1=16.7 CCD, Dia.=0.55′, DC=8; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Aug. 31.85 UT: m1=16.6 CCD, Dia.=0.23′, DC=8; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Aug. 21.88 UT: m1=15.5 CCD, Dia.=0.23′, DC=8/; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Aug. 12.88 UT: m1=16.4 CCD, Dia.=0.19′, DC=8, Tail=1,3′ in PA=128 deg.; 25-cm L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Aug. 07.89 UT: m1=16.6 CCD, Dia.=0.13′, DC=8; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Aug. 03.93 UT: m1=16.5 CCD, Dia.=0.25′, DC=9, Tail=0.68′ in PA: 149 deg.; 0.25-m L  f/4.7 + CCD; Sergey Shurpakov (Baran’,Belarus)
2016 July 30.92 UT: m1=16.4 CCD, Dia.=0.24′, DC=8/; 0.25-m L  f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2015 Nov. 11.89 UT: m1=16.2, Dia.=0.2′, DC=7; 60.3-cm L (305x); Sandor Szabo (Sopron, Hungary)
2015 Oct. 15.88 UT: m1=14.5 CCD, Dia.=0.6′, Tail=2.1′ in PA: 132 deg.; [T16] 0.15-m f/7.3 refractor + CCD; A. Novichonok & T. Prystavski (AstroCamp Observatory, I89 remotely from Nerpio, Spain)

Curva de Luz Visual Pre y Post-perihélica del C/2013 US10 (Catalina) Magnitud Heliocéntrica (Helio Mag) versus Distancia al Sol (r) sobre observaciones aportadas a la Sección Cometaria de la LIADA. Fórmula Preperihélica: m = 3.5 + 5 log d + 13.5 log r / Fórmula Postperihélica m = 4.1 + 5 log d + 16.0 log r

Curva de Luz Visual Pre y Post-perihélica del C/2013 US10 (Catalina) Magnitud Heliocéntrica (Helio Mag) versus Distancia al Sol (r) sobre observaciones aportadas a la Sección Cometaria de la LIADA. Fórmula Preperihélica: m = 3.5 + 5 log d + 13.5 log r / Fórmula Postperihélica m = 4.1 + 5 log d + 16.0 log r

C/2013 X1 (PANSTARRS) C2013X1_Mag
2016 Sep. 28.38 UT: m1=13.3, Dia.=0.7’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma difficult to see, no tail, very diffuse. Zodiacal light interference. Sky slightly hazy from smoke]
2016 Aug. 08.51 UT: m1=10.6, Dia.=4.8’, DC=3; 25cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Moonlight (Altitude= 0.5°, 28.6% Illumination); Outer coma semi-transparent and brightening slightly to a weakly condensed centre. Tail difficult to see. Coma enhances well in Swan Band filter]
2016 Ago. 05.86 UT: m1=9.2, Dia.=5′, DC=3, no cola; 20-cm SCT (50x); Carlos Labordena (Castellón, España)
2016 Ago. 01.87 UT: m1=8.2, Dia.=8′, DC=3; 20-cm SCT (77x); Juan José González (Cueto Rosales, alt. 1420 m, León, España) [Crepúsculo astronómico. Muy baja altura sobre el horizonte : 6º. Estrellas de comparación a la misma altura que el cometa. Cielo muy claro de montaña]
2016 July 31.98 UT: m1=8.8, Dia.=6′, DC=2; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 July 31.40 UT: m1=9.8, Dia.=4.2’, DC=4/; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Faint tail traced to 55’ in length in P.A. 109° approximately. Outer coma diffuse and semi-transparent brightens to a moderately condensed centre. Coma enhances well in Swan Band filter]
2016 July 29.87 UT: m1=8.9, Dia.=6′, DC=3, no cola; 20-cm SCT (50x); Carlos Labordena (Castellón, España)
2016 July 29.46 UT: m1=10.0, Dia.=3.8’, DC=4; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Tail visible 41.2’in length in P.A. 107°; Coma centre diffuse, opaque, fading to semi-transparent outer coma]
2016 July 28.41 UT: m1=10.1:, Dia.=3.9’, DC=3; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Magnitude uncertain due to background stars in coma; tail visible 49.2’in length in P.A. 105°. Enhances well in Swan Band filter]
2016 July 28.04 UT: m1=8.6, Dia.=7′, DC=2; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 July 27.89 UT: m1=8.1, Dia.=8′, DC=3; 20-cm SCT (77x); Juan José González (Alto del Castro, alt. 1720 m, León, España) [Crepúsculo astronómico. Muy baja altura sobre el horizonte : 5º. Estrellas de comparación a la misma altura que el cometa. Cielo muy claro de montaña]
2016 July 27.21 UT: m1=8.5, Dia.=8′, DC=2/; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 July 25.40 UT: m1=9.9, Dia.=5.1’, DC=4/; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Outer coma semi-opaque and increasing in brightness to a more opaque and moderately condensed centre. Tail visible and traced to 50’in length in P.A 107°]
2016 July 09.98 UT: m1=7.8, Dia.=3.5′, DC=3; 25-cm L F/4.5 (66x); A. Gonzalo Vargas B. (Cochabamba, Bolivia) [Se aprecia un ligero alargamiento o deformación de la coma en un ángulo AP que estimo entre 95 a 97 grados, seeing escala Antoniadi:2 ].
2016 July 05.03 UT: m1=7.3, Dia.=8′, DC=3; 10-cm R f/5 (25x); Willian Souza (Sao Paulo, Brazil)
2016 July 04.17 UT: m1=7.2, Dia.=12′, DC=3; 7×50 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 July 04.05 UT: m1=7.2, Dia.=10′, DC=3; 10-cm R f/5 (25x); Willian Souza (Sao Paulo, Brazil)
2016 July 03.47 UT: m1=7.1:, Dia.=10.6’, DC=5/; 7×50 B; Chris Wyatt (Walcha, NSW, Australia) [Magnitude uncertain; Coma in busy star field, difficult to extract reliable m1 value. Enhances well in Swan Band filter. Tail difficult to trace due to galactic plane]
2016 July 03.18 UT: m1=7.0, Dia.=10′, DC=3; 15×70 B; Willian Souza (Sao Paulo, Brazil)
2016 July 02.40 UT: m1=7.5, Dia.=17’, DC=5; 7×50 B; Chris Wyatt (Walcha, NSW, Australia) [Semi-transparent outer coma gradually brightening to an almost stellar and opaque inner coma. Faint tail traced out to 22’in length in P.A. 072° where it is lost into the galactic plane. Coma enhances strongly in Swan Band filter]
2016 July 01.17 UT: m1=6.9, Dia.=15′, DC=3; 7×50 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 July 01.01 UT: m1=6.8, Dia.=9′, DC=4; 25-cm L F/4.5 (66x); A. Gonzalo Vargas B. (Cochabamba, Bolivia) [Parte de la zona central de la coma concentrada sin llegar a apariencia estelar, alargamiento o deformación de la coma en 5´de arco en un ángulo AP que estimo entre 35 a 45 grados]
2016 June 29.47 UT: m1=7.2, Dia.=6.8’, DC=4; 7×50 B; Chris Wyatt (Walcha, NSW, Australia) [Coma framed by bright stars to the N, E, S and NW. Faint tail visible 14’ in length approximately in P.A. 062°. Coma shows faint outer coma and brightening to opaque and moderately condensed centre]
2016 June 29.14 UT: m1=6.5, Dia.=16′, DC=3/; 7×50 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 June 28.51 UT: m1=7.1, Dia.=16’, DC=4/; 7×50 B; Chris Wyatt (Walcha, NSW, Australia) [Coma enhances strongly in Swan Band filter. Very tenuous but short tail visible 13’in length approximately in P.A. 060° and about 10’ in width where it leaves the coma. Outer coma diffuse and brightening to a moderately condensed centre. Pale aqua-blue in colour]
2016 June 28.02 UT: m1=6.4, Dia.=18′, DC=4; 7×50 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 June 27.12 UT: m1=6.4, Dia.=18′, DC=4; 7×50 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 June 25.41 UT: m1=6.6, Dia.=15.2’, DC=4; 7×50 B; Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse with semi-opaque outer coma and brightening to a moderately condensed centre. Coma appears slightly elongated to ENE approximately. No tail visible in the 7×50 B’s but using 11×70 B’s there appears to be a faint tail approximately 12’ in length in P.A. 068°. Coma shows a 9th magnitude star within the coma 3.6’away in P.A. 270° from coma centre. Enhances strongly in Swan Band filter]
2016 June 24.97 UT: m1=6.2, Dia.=18′, DC=4; 7×50 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 June 15.14 UT: m1=6.5, Dia.=15′, DC=4; 10×50 B; Willian Souza (Marilia, Brazil)
2016 June 14.17 UT: m1=6.5, Dia.=15′, DC=3; 15×70 B; Willian Souza (Sao Paulo, Brazil)
2016 June 14.15 UT: m1=6.4, Dia.=15′, DC=4; 7×50 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Moonlight]
2016 Jun. 12.45 UT: m1=6.3, Dia.=10′, DC=5; 10×50 B; Carl Hergenrother (Tucson, AZ, USA)
2016 June 09.20 UT: m1=6.4, Dia.=15′, DC=3/; 10-cm f/5 refractor (25x); Willian Souza (Sao Paulo, Brazil)
2016 June 09.16 UT: m1=6.5, Dia.=15′, DC=3; 15×70 B; Willian Souza (Sao Paulo, Brazil)
2016 June 08.49 UT: m1=6.7, Dia.=20’, DC=4; 7×50 B; Chris Wyatt (Walcha, NSW, Australia) [Enhances strongly in Swan band filter, no tail visible. Centre is moderately condensed and appears green/blue in colour, slightly elongated to NNW]
2016 June 08.21 UT: m1=6.4, Dia.=15′, DC=4/; 7×50 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Tail= 15 arcmin in PA: 260 degrees by using 20 x 100 B]
2016 June 07.05 UT: m1=[6.4 NEGATIVE, Dia.=3.0′; 20×80 B; Marek Biely (Brno, Czech Republic) [No chance in these altitudes. Fainter than 6.4 mag. Slight interference of astronomical twilight]
2016 June 05.45 UT: m1=7.0, Dia.=9′, DC=4; 10×50 B; Carl Hergenrother (Tucson, AZ, USA)
2016 June 05.36 UT: m1=6.5, Dia.=10.5′, DC=5; 25-cm L F/4.5 (66x); A. Gonzalo Vargas B. (Cochabamba, Bolivia) [Parte de la zona central de la coma muy concentrada sin llegar a apariencia estelar, alargamiento o deformación de la coma en un ángulo AP que estimo entre 265 y 270 grados].
2016 June 05.23 UT: m1=6.4, Dia.=10′, DC=4; 7×50 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Clouds]
2016 June 05.12 UT: m1=6.7, Dia.=8′, DC=5, no cola; 8-cm B (11x); Carlos Labordena (Castellón, España)
2016 June 03.75 UT: m1=7.9, Dia.=7′, DC=5; 40.0-cm L f/4.5 (36x); Seiichi Yoshida (Gunma, Japan)
2016 June 02.45 UT: m1=6.8, Dia.=8′, DC=4; 10×50 B; Carl Hergenrother (Tucson, AZ, USA)
2016 June 01.11 UT: m1=6.6, Dia.=10′, DC=5; 10×50 B; Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España) [Altura sobre el horizonte: 12º. Comienzo del crepúsculo astronómico. Cielo muy claro de montaña]

Curva de Luz visual al 22 de Octubre: C/2013 V5 (Oukaimeden) Gráfico de Magnitud Heliocéntrica versus Log. R. / Perihelio: T 2014 Sept. 28.2225 TT / Sección Cometas de la LIADA

C/2013 V5 (Oukaimeden) Curva de Luz visual al 22 de Octubre: C/2013 V5 (Oukaimeden) Gráfico de Magnitud Heliocéntrica versus Log. R. / Perihelio: T 2014 Sept. 28.2225 TT / Sección Cometas de la LIADA

C/2013 V4 (Catalina) C2013V4_Mag
2016 Dec. 30.08 UT: m1=16.3, Dia.=0.15’, DC=2; 60-cm L (407x); Sandor Szabo (Hungary)
2015 Nov. 11.98 UT: m1=15.7, Dia.=0.3′, DC=4; 50.8-cm L (307x); Sandor Szabo (Sopron, Hungary)
2015 Oct. 13.48 UT: m1=14.3 CCD, Dia.=0.7′, Tail=1.2′ in PA: 219 deg.; [T20] 0.1-m f/5.0 astrograph + CCD; A. Novichonok & T. Prystavski (iTelescope observatory, H06 remotely from Mayhill, U.S.A.)

Curva de Luz Visual Pre y Post perihélica del C/2013 US10 (Catalina) Magnitud Heliocéntrica (Helio Mag) versus Distancia al Sol (r) sobre observaciones aportadas a la Sección Cometaria de la LIADA

Curva de Luz Visual Pre y Post perihélica del C/2013 US10 (Catalina) Magnitud Heliocéntrica (Helio Mag) versus Distancia al Sol (r) sobre observaciones aportadas a la Sección Cometaria de la LIADA / 20160902. Fórmula Preperihélica: m = 4.9 + 5 log D + 8.2 log R / Fórmula Postperihélica: m= 5.5 + 5 log D + 8.4 log R

C/2013 US10 (Catalina) C2013US10_Mag
2016 Dec. 29.99 UT: m1=[15.5, NEGATIVE; 60-cm L (407x); Sandor Szabo (Hungary) [Fainter than 15.5 mag]
2016 Sep. 03.05 UT: m1=15.2 CCD, Dia.=0.39′, DC=8; 0.25-m L  f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Sep. 01.74 UT: m1=[13.5, negative; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2016 Sep. 01.07 UT: m1=14.4, Dia.=0.7′, DC=2; 60-cm L (305x); Sandor Szabo (Hungary)
2016 Sep. 01.07 UT: m1=15.7 CCD, Dia.=0.30′, DC=7/; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Aug. 31.04 UT: m1=13.9, Dia.=1.3′, DC=1; 35-cm L (178x); Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 30.03 UT: m1=13.8, Dia.=1.2′, DC=2/; 35-cm L (178x); Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 28.03 UT: m1=13.8, Dia.=1.0′, DC=2; 35-cm L (178x); Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 23.03 UT: m1=15.3 CCD, Dia.=0.56′, DC=7; 0.20-m L f/4 + CCD; Sergey Shurpakov (A98, Baran’,Belarus)
2016 Aug. 14.04 UT: m1=15.8 CCD, Dia.=0.31′, DC=7/; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 May  04.47 UT: m1=11.9, Dia.=1.4′, DC=2; 40.0cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)
2016 May  02.45 UT: m1=11.6, Dia.=1.6′, DC=2; 40.0cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)

Curva de Luz (Mag. heliocéntrica vs Log R) Visual del Cometa C/2012 K1 (PANSTARRS) al 6 de Diciembre. LIADA Sección Cometas. Preperihelio: Ho 4.7, n: 4. Postperihelio Ho 5.5, n: 4

C/2012 K1 (PANSTARRS) Curva de Luz (Mag. heliocéntrica vs Log R) Visual del Cometa C/2012 K1 (PANSTARRS) al 9 de Mayo. LIADA Sección Cometas. Pre-perihelio: Ho 4.7, n: 4. Post-perihelio Ho 5.5, n: 4

C/2012 K1 (PANSTARRS) C2012K1_Mag
2015 Oct. 03.54 UT: m1=15.3 CCD, Dia.=0.6′; [T31] 0.50-m f/6.8 astrograph + CCD + focal reducer; A. Novichonok & T. Prystavski (iTelescope observatory, Q62 remotely from Siding Spring, Australia)

C/2012 F3 (PANSTARRS) C2012F3_Mag
2016 Aug. 31.97 UT: m1=16.3 CCD, Dia.=0.32′, DC=6/; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2015 Oct. 02.08 UT: m1=15.0: CCD, Dia.=&0.5′; [T20] 0.1-m f/5.0 astrograph + CCD; A. Novichonok & T. Prystavski (iTelescope observatory, H06 remotely from Mayhill, U.S.A.)

C/2011 KP36 (Spacewatch) C2011KP36_Mag
2017 Nov. 22.94 UT: m1=15.0, Dia.=0.5′, DC=3; 60-cm L (306x); Sandor Szabo (Hungary)
2017 Aug. 19.03 UT: m1=15.4, Dia.=0.35′, DC=0; 0.60-m L (520x); Gabor Santa (Hungary) [Checked on a photo taken on the same night and same location by Ákos Nagy Mélykuti]
2017 Jan. 25.69 UT: m1=15.6 CCD, Dia.=0.48′, DC=7/, Tail=0.82′ in PA 269 deg.; 0.25-m f/4.7 reflector + CCD; Sergei Shurpakov (C36, Baran’, Belarus)
2016 Dec. 31.73 UT: m1=14.3, Dia.=0.9′, DC=4; 35-cm L (178x); Jakub Cerny (Senohraby, Czech Republic)
2016 Nov. 22.46 UT: m1=14.2, Dia.=0.8’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to an opaque centre]
2016 Nov. 16.80 UT: m1=12.3, Dia.=1′, DC=3; 20-cm SCT (133x); Juan José González (Gamoniteiro – Sierra del Aramo, alt. 1730 m, Asturias, España) [Estrellas de comparación de la fotometría APASS cercana al cometa. Estrellas de campo comprobadas en el DSS. Cielo muy claro de montaña]
2016 Nov. 04.44 UT: m1=[12.9; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2016 Nov. 01.43 UT: m1=14.5, Dia.=1.2’, DC=2/; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, very weakly condensed]
2016 Oct. 31.43 UT: m1=13.6, Dia.=1.1’, DC=2/; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, slight brightening to centre]
2016 Oct. 26.84 UT: m1=12.3, Dia.=1.5′, DC=3; 20-cm SCT (100x); Juan José González (Pandorado, alt. 1190 m, León, España) [Estrellas de comparación de la fotometría APASS cercana al cometa. Estrellas de campo comprobadas en el DSS. Cielo muy claro de montaña]
2016 Oct. 25.42 UT: m1=13.9, Dia.=1.3’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse with slight brightening to centre]
2016 Oct. 24.43 UT: m1=13.5, Dia.=1.5’, DC=3; 25-cm L f:5 (x83); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, slight brightening to centre. No tail]
2016 Oct. 23.42 UT: m1=13.6, Dia.=1.4’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, slight brightening to centre. No tail]
2016 Oct. 20.45 UT: m1=13.1, Dia.=0.9′, DC=2; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2016 Oct. 19.42 UT: m1=13.2, Dia.=1.7’, DC=3; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, no tail]
2016 Oct. 18.41 UT: m1=13.1, Dia.=1.7’, DC=2/; 25cm L f:5 (x39); Chris Wyatt, Walcha, NSW, Australia) [Coma very diffuse, no tail. Visible in good seeing, weakly condensed. Does not enhance in Swan Band filter]
2016 Oct. 11.70 UT: m1=12.2, Dia.=2.4’, DC=2/; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, weakly condensed centre. Does not enhance in Swan Band filter]
2016 Oct. 05.71 UT: m1=12.2, Dia.=2.8’, DC=3; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre, no tail. Does not enhance in Swan Band filter]
2016 Oct. 04.47 UT: m1=12.8, Dia.=3’, DC=3; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma does not enhance in Swan Band filter. Outer coma very diffuse, brightening slightly to centre]
2016 Sep. 28.44 UT: m1=13.7, Dia.=0.6’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Magnitude uncertain; no tail, coma diffuse, slight brightening to centre. Cloud ended observation prematurely. Sky slightly hazy from smoke]
2016 Sep. 27.72 UT: m1=13.6, Dia.=1’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse with an opaque and weakly condensed centre fading to edges. No tail. Does not enhance in Swan Band filter]
2016 Sep. 26.44 UT: m1=13.4, Dia.=0.8’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse with slight brightening to centre, no tail. Conditions windy]
2016 Sep. 01.73 UT: m1=13.0, Dia.=0.8′, DC=3; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)
2016 Sep. 01.03 UT: m1=14.5, Dia.=0.7′, DC=4; 60-cm L (187x); Sandor Szabo (Hungary)
2016 Sep. 01.03 UT: m1=14.7 CCD, Dia.=0.66′, DC=6/; 0.25-m L  f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Aug. 30.94 UT: m1=14.0, Dia.=0.7′, DC=2/; 35-cm L (178x); Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 29.98 UT: m1=14.6, Dia.=0.7′, DC=4; 35-cm L (178x); Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 28.99 UT: m1=14.5, Dia.=0.4′, DC=4; 35-cm L (178x); Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 28.00 UT: m1=14.5, Dia.=0.4′, DC=3; 35-cm L (178x); Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 26.96 UT: m1=14.4, Dia.=0.4′, DC=3; 35-cm L (178x); Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 12.74 UT: m1=13.8, Dia.=1’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse with slight brightening to centre]
2016 Aug. 08.75 UT: m1=14.6, Dia.=0.4’, DC=2; 25cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma small and diffuse, slight brightening to centre, no tail. Close to faint stars. SQM results averaged over 5 readings = 21.97 at -2° C. Observing site 30kms East of Walcha at 1250m altitude]
C/2011 J2 (LINEAR) C2011J2_Mag
2015 Oct. 04.58 UT: m1=16.5: CCD, Dia.=&0.4′; [T31] 0.50-m f/6.8 astrograph + CCD + focal reducer; A. Novichonok & T. Prystavski (iTelescope observatory, Q62 remotely from Siding Spring, Australia)


(3200) Phaeton
2017 Nov. 22.98 UT: m1=14.5, Dia.=0.0′, DC=9; 60-cm L (407x); Sandor Szabo (Hungary)

355P/LINEAR-NEAT 
2017 Nov. 22.83 UT: m1=14.8, Dia.=0.7′, DC=3; 60-cm L (306x); Sandor Szabo (Hungary)

333P/LINEAR 333P_Mag
2016 Mar. 30.80 UT: m1=13.0, Dia.=0.8′, DC=3; 60.3-cm L (188x); Sandor Szabo (Sopron, Hungary)
2016 Mar. 22.42 UT: m1=12.0, Dia.=1.0′, DC=2; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Ibaraki, Japan)
2016 Mar. 20.80 UT: m1=13 DSLR, Dia.=1′; 1100d+300mm lens; Giuseppe Pappa (Sicily, Italy)
2016 Mar. 11.85 UT: m1=11.7, Dia.=1.5′, DC=2, no cola; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2016 Mar. 10.95 UT: m1=11.5, Dia.=1.5′, DC=2: 22-cm L (160x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 Mar. 10.85 UT: m1=11.8, Dia.=1′, DC=5; 11.4-cm L f/8 (45x); Neil Norman (Ipswich, England)
2016 Mar. 09.80 UT: m1=11.8, Dia.=0.5′; 32.0-cm L f/5 (144x); Uwe Pilz (Leipzig, Germany)
2016 Mar. 07.854 UT: m1=11.8,Dia=1′, DC=2; 11.4-cm L f/8 (45x); Neil Norman (Ipswich, England)
2016 Mar. 07.78 UT: m1=11.7 DSLR, Dia.=1′; 1100d+300mm lens; Giuseppe Pappa (Sicily, Italy)
2016 Mar. 07.74 UT: m1=11.8, Dia.=1′, DC=3; 25.5-cm L (120x); Danil Sidorko (Korenovsk, Russia)
2016 Mar. 05.90 UT: m1=11.3, Dia.=2.0′, DC=3; 20-cm SCT (100x); Juan José González (El Chano – Riofrío, alt. 990 m, León, España)
2016 Mar. 03.42 UT: m1=12.6, Dia.=0.6′, DC=2; 40.6-cm L f/4 (260x); Paul Camilleri (Warners Bay, Australia)

329P/LINEAR-Catalina 329P_Mag
2016 Jan. 29.85 UT: m1=[15.3, NEGATIVE; 60.3-cm L (305x); Sandor Szabo (Sieggraben, Austria) [a nearby bright star is disturbing]

325P/Yang-Gao 325P_Mag
2015 Oct. 04.43 UT: m1=17.5: CCD, Dia.=&0.2′; [T31] 0.50-m f/6.8 astrograph + CCD + focal reducer; A. Novichonok & T. Prystavski (iTelescope observatory, Q62 remotely from Siding Spring, Australia)

319P/Catalina-McNaught 319P_Mag
2015 Oct. 04.60 UT: m1=18.0: CCD, Dia.=&0.3′, Tail=&0.9′ in PA 267 deg.; [T31] 0.50-m f/6.8 astrograph + CCD + focal reducer; A. Novichonok & T. Prystavski (iTelescope observatory, Q62 remotely from Siding Spring, Australia)

318P/McNaught-Hartley 318P_Mag
2015 Nov. 11.82 UT: m1=15.2, Dia.=0.4′, DC=4; 60.3-cm L (305x); Sandor Szabo (Sopron, Hungary)
2015 Oct. 16.39 UT: m1=15.3 CCD, Dia.=0.5′, Tail=1.2′ in PA: 62 deg.; [T31] 0.50-m f/6.8 astrograph + CCD + focal reducer; A. Novichonok & T. Prystavski (iTelescope observatory, Q62 remotely from Siding Spring, Australia)

LC_252P_LIADA_20160607g

Curva de Luz Visual Pre y Post perihélica del 252P Magnitud Heliocéntrica (Helio Mag) versus Distancia al Sol (r) sobre observaciones aportadas a la Sección Cometaria de la LIADA. / Fórmula Preperihélica: m = 13.5 + 5 log d + 800.0 log r / Fórmula Postperihélica 1 m = 11.7 + 5 log d + 180.0 log r /Fórmula Postperihélica 2 m = 12.7 + 5 log d + -100.0 log r / Fórmula Postperihélica 3 m = 9.5 + 5 log d + 14.0 log r

315P/LONEOS 315ploneos_mag
2017 Mar. 28.04 UT: m1=14.2 CCD, Dia.=0.57′; 15-cm L + CCD + Rc filter, f/4; Mieczyslaw Leszek Paradowski (Lublin, Poland)
2017 Mar. 27.95 UT: m1=14.8 CCD, Dia.=0.57′; 15-cm L + CCD + V filter, f/4; Mieczyslaw Leszek Paradowski (Lublin, Poland)
2017 Mar. 27.52 UT: m1=14.5, Dia.=0.4’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very small, visible in periods of good seeing. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Mar. 26.93 UT: m1=14.6, Dia.=0.6′, DC=4; 60-cm L (244x); Sandor Szabo (Hungary)
2017 Mar. 22.56 UT: m1=14.0, Dia.=0.5′, DC=2; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Ibaraki, Japan)
2017 Mar. 16.89 UT: m1=15.7 CCD, Dia.=0.22′, DC=7/; 0.25-m f/4.7 reflector + CCD; S. Shurpakov (Observatory C36, Baran’, Belarus)
2017 Mar. 15.83 UT: m1=12.3, Dia.=1.7′, DC=2/; 20-cm SCT (133x); Juan Jose Gonzalez (Alto del Trichero – Soto y Amío, Leon, Spain; Alt. 1190 m, 42º 46′ N, 5º 53′ W) [Sidgwick method. APASS comparison stars. Possible minor outburst. Very faint and diffuse outer coma. Near-stellar central condensation, m2=14.7 (APASS). Field stars checked in DSS. Limiting star magnitude near comet: 15.0 (APASS). Mountain location, very clear sky. SQM: 21.3 at zenith]
2017 Mar. 15.83 UT: m1=13.5, Dia.=0.9′, DC=6; 30.5-cm L f:4.9 (150x); J. P. Navarro Pina (Campos del Rio, Murcia, Spain)
2017 Mar. 15.81 UT: m1=14.2, Dia.=0.4′, DC=6; 33-cm L (182x); Piotr Guzik (Koskowa Góra, Poland; Alt. 810 m, 49º 45′ N, 19º 47′ E) [Small and well condensed, at 67x almost stellar. SQM-L: 21.1 at zenith. Bobrovnikoff method used, APASS comparison stars]
2017 Mar. 03.75 UT: m1=[13.5; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Ibaraki, Japan)
2017 Jan. 26.02 UT: m1=15.7 CCD, Dia.=0.37′, DC=8/, Tail=0.9′ in PA 274 deg.; 0.25-m f/4.7 reflector + CCD; Sergei Shurpakov (C36, Baran’, Belarus)
2017 Jan. 24.85 UT: m1=14.0, Dia.=0.3′, DC=2; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Ibaraki, Japan)
2017 Jan. 24.25 UT: m1=13.7, Dia.=0.3′, DC=6; 20-cm SCT (133x); Juan Jose Gonzalez (Collada de la Cobertoria, Asturias, Spain; Alt. 1190 m, 43º 09′ N, 5º 54′ W) [Sidgwick method. APASS comparison stars. SQM: 21.5 at zenith. Field stars checked in DSS. Limiting star magnitude near comet: 15.3 (GSC). Mountain location, very clear sky]
2017 Jan. 07.04 UT: m1=15.8 CCD, Dia.=0.35′, DC=8; 0.25-m f/4.7 reflector + CCD; S. Shurpakov (Observatory C36, Baran’, Belarus)
2016 Dec. 30.11 UT: m1=[15.8, NEGATIVE; 60-cm L (407x); Sandor Szabo (Hungary) [Fainter than 15.8 mag]

252P/LINEAR 252P_Mag
2016 June 11.95 UT: m1=11.9, Dia.=2.5′, DC=0; 30-cm L f/5 (60x); Mieczyslaw Leszek Paradowski (Dąbrowa, Poland)
2016 June 06.89 UT: m1=[10.7 NEGATIVE, Dia.=1.9′; 20×80 B; Marek Biely (Brno, Czech Republic) [It must have faded out very rapidly as there was no sign of comet in predicted position. Fainter than 10.7 mag. Slight interference of astronomical twilight]
2016 June 04.96 UT: m1= 10.4, Dia=5′, DC=1, no cola; 20-cm SCT (50x); Carlos Labordena (Castellón, España)
2016 June 03.83 UT: m1=11.5 DSRL, Dia.=4′; 1100d+300mm lens; Giuseppe Pappa (Mascalucia, Sicily, Italy)
2016 June 03.56 UT: m1=[12.5; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)
2016 June 01.00 UT: m1=10.0, Dia.=6′, DC=0; 20-cm SCT (77x); Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España)
2016 May  30.56 UT: m1=11.0:, Dia.=5′, DC=0; 40.6-cm L (76x); Paul Camilleri (Warners Bay, Australia)
2016 May  30.51 UT: m1=11.6, Dia.=5.1’, DC=0; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Very diffuse and difficult. Does not enhance with Swan Band filter]
2016 May  29.95 UT: m1=9.8, Dia.=7′, DC=2, no cola; 20-cm SCT (50x); Carlos Labordena (Castellón, España)
2016 May  27.95 UT: m1=15.7 CCD, Dia.=0.50′, DC=9; 25-cm L f/4.7; Sergey Shurpakov (Baran’, Belarus)
2016 May  27.94 UT: m1=9.9, Dia.=10′, DC=2: 20×1000 B; Martin Lehky ((Hradec Kralove, Czech Republic)
2016 May  27.03 UT: m1=9.4, Dia.=8′, DC=2; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 May  26.98 UT: m1=9.8, Dia.=10′, DC=2: 20×1000 B; Martin Lehky ((Hradec Kralove, Czech Republic)
2016 May  22.85 UT: m1=8.5, Dia.=10′, DC=1; 20×80 B; J. P. Navarro Pina (El Palmar, Murcia, Spain)
2016 May  15.76 UT: m1=9.2, Dia.=10′, DC=1; 8-cm B (20x); Paul Camilleri (Warners Bay, Australia)
2016 Mayo 15.09 UT: m1=8.2, Dia.=12′, DC=2; 25×100 B; Juan José González (Cueto Rosales, alt. 1420 m, León, España ).
2016 May  15.08 UT: m1=8.7, Dia.=10′, DC=2, no cola; 15-cm T (45x); Carlos Labordena (Castellón, España)
2016 May  14.76 UT: m1=9.3, Dia.=8′, DC=1; 8-cm R (12x); Paul Camilleri (Warners Bay, Australia)
2016 May  14.25 UT: m1=9.0, Dia.=8’, DC=1, Cola: no visible; 25-cm T (40x); Alberto Anunziato (Oro Verde, Argentina)
2016 May  14.17 UT: m1=8.4, Dia.=12′, DC=2/; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 May  13.74 UT: m1=9.3, Dia.=8′, DC=1; 8-cm B (20x); Paul Camilleri (Warners Bay, Australia)
2016 May  12.76 UT: m1=9.1, Dia.=8′, DC=1; 8-cm B (20x); Paul Camilleri (Warners Bay, Australia)
2016 May  11.75 UT: m1=8.8, Dia.=10′, DC=1; 8-cm B (20x); Paul Camilleri (Warners Bay, Australia)
2016 May  10.75 UT: m1=8.4, Dia.=&10′, DC=1; 8-cm B (20x); Paul Camilleri (Warners Bay, Australia) [Comet was located close to a magnitude 7.3 star which made the estimate of the coma difficult so only an approximate diameter could be given]
2016 May  09.95 UT: m1=7.9, Dia.=12′, DC=1/; 20×80 B; Marek Biely (Brno, Czech Republic)
2016 May  09.76 UT: m1=8.0, Dia.=12.0′, DC=1; 8-cm B (20x); Paul Camilleri (Warners Bay, Australia)
2016 May  09.45 UT: m1=8.8, Dia.=8′, DC=1; 30×125 B; Carl Hergenrother (Tucson, AZ, USA)
2016 May  08.91 UT: m1=9.0, Dia.=10′, DC=1/; 13-cm L (65x); Alexsandr Morozov (Novozybkov, Russia)
2016 May  08.89 UT: m1=12.4 CCD, Dia.=1.12′, DC=6; 0.20-m L+CCD; Sergey Shurpakov, Baran’, Belarus, A98)
2016 May  08.88 UT: m1=8.3, Dia.=15′, DC=1; 20×80 B; Marek Biely (Brno, Czech Republic) [This time it was fainter and more diffuse]
2016 May  08.00 UT: m1=8.1, Dia.=&15, DC=0; 15×80 B; Alex Scholten (Eerbeek, Netherlands)
2016 May  07.90 UT: m1=7.3, Dia.=15′, DC=2/; 20×80 B; Marek Biely (Brno, Czech Republic) [It seemed to be much brighter than a night ago, probably due to better sky conditions.]
2016 May  07.90 UT: m1=8.8, Dia.=12′.3, DC=3; 35-cm L (62x); Jakub Cerny (Senohraby, Czech Republic)
2016 May  06.94 UT: m1=8.2, Dia.=12′, DC=2; 20×80 B; Marek Biely (Brno, Czech Republic)
2016 May  06.76 UT: m1=7.8, Dia.=15′, DC=2; 8-cm B (20x); Paul Camilleri (Warners Bay, Australia)
2016 May  06.17 UT: m1=7.7, Dia.=15′, DC=2; 7×50 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 May  06.03 UT: m1=12.1 CCD, Dia.=1.7′, DC=6/; 25-cm L+CCD; Sergey Shurpakov (Baran’,Belarus)
2016 May  05.76 UT: m1=7.8, Dia.=12′, DC=2; 8-cm B (20x); Paul Camilleri (Warners Bay, Australia)
2016 May  05.01 UT: m1=7.9, Dia.=&15′,  DC=0; 15×80 B; Alex Scholten (Eerbeek, Netherlands)
2015 May  04.75 UT: m1=7.6, Dia.=12′, DC=2; 8-cm B (20x); Paul Camilleri (Warners Bay, Australia)
2016 May  04.72 UT: m1=8.5, Dia.=10′, DC=3; 40.0-cm L f/4.5 (36x); Seiichi Yoshida (Gunma, Japan)
2016 May  04.71 UT: m1=7.9, Dia.=16′, DC=1; 10×70 R; Seiichi Yoshida (Gunma, Japan)
2016 May  04.65 UT: m1=7.5, Dia.=20’, DC=2; 7×50 B; Chris Wyatt (Walcha, NSW, Australia) [Enhances well in Swan Band filter, no tail. Outer coma semi-transparent brightening slightly to a weakly condensed centre]
2016 May  04.25 UT: m1=7.3, Dia.=12′, DC=2; 10×50 B; Carl Hergenrother (Tucson, AZ, USA)
2016 May  04.19 UT: m1=7.4, Dia.=15′, DC=2; 7×50 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 May  03.96 UT: m1=8.1, Dia.=10′, DC=1/; 13-cm L (26x); Alexsandr Morozov (Novozybkov, Russia)
2016 May  03.86 UT: m1=11.5 CCD, Dia.=6′, DC=2; 20-cm L+CCD; Danil Sidorko (Korenovsk, Russia)
2016 May  03.70 UT: m1=7.4, Dia.=12′, DC=3; 8-cm B (20x); Paul Camilleri (Warners Bay, Australia)
2016 May  03.17 UT: m1=7.3, Dia.=18′, DC=2/; 7×50 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 May  02.90 UT: m1=8.5, Dia.=15′, DC=1; 20X80 B; J. P. Navarro Pina (Mula, Murcia, Spain)
2016 May  02.77 UT: m1=7.5, Dia.=15′, DC=1; 8-cm B (20x); Paul Camilleri (Warners Bay, Australia)
2016 May. 02.30 UT: m1=7.2, Dia.=10′, DC=2; 10×50 B; Carl Hergenrother (Tucson, AZ, USA)
2016 May  02.01 UT: m1=7.3, Dia.=&16, DC=0; 15×80 B; Alex Scholten (Eerbeek, Netherlands)
2016 May  01.81 UT: m1=7.9, Dia.=12′, DC=2; 25.5-cm L (46.2x); Danil Sidorko (Korenovsk, Russia)
2016 May  01.77 UT: m1=7.5, Dia.=12′, DC=1; 8-cm B (20x); Paul Camilleri (Warners Bay, Australia) [Comet was fairly easy to observe with 20x80B, coma appeared vague and of low surface brightness, not sure if this was due to the last quarter Moon light (32% Illuminated)]
2016 May  01.66 UT: m1=7.9, Dia.=14′, DC=1; 10×70 R; Seiichi Yoshida (Gunma, Japan)
2016 May  01.65 UT: m1=8.9, Dia.=9′, DC=2; 40.0-cm L f/4.5 (36x); Seiichi Yoshida (Gunma, Japan)
2016 May  01.17 UT: m1=7.1, Dia.=20′, DC=3; 7×50 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 May  01.05 UT: m1=7.2, Dia.=20′, DC=3, no cola; 8-cm B (11x); Carlos Labordena (Castellón, España)
2016 May  01.00 UT: m1=11.3 CCD, Dia.=1.13′, DC=6; 0.25-m L+CCD; Sergey Shurpakov (Baran’, Belarus)
2016 May  01.00 UT: m1=6.8, Dia.=20′, DC=2/; 10×50 B; Juan José González (Cueto Rosales, alt. 1420 m, León, España)

249P/LINEAR 249P_Mag
2016 Feb. 29.44 UT: m1=13.8, Dia.=0.8’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [No tail, outer coma appears very diffuse and transparent, inner coma slightly brighter but diffused. Does not appear to enhance in Swan Band filter. Observed motion over 40 minute period, site altitude = 1250m. Windy conditions, SQM = 21.85 in vicinity of Upsilon 2 Eridanii (averaged over 6 readings)]
2016 Jan. 29.77 UT: m1=[15.8, NEGATIVE; 60.3-cm L (305x); Sandor Szabo (Sieggraben, Austria)
2016 Jan. 09.39 UT: m1=[13.0; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Ibaraki, Japan)
2016 Jan. 08.74 UT: m1=13.0 DSLR, Dia.=0.5′; 1100d+300mm lens; Giuseppe Pappa (Sicily, Italy)

240P/NEAT
2017 Nov. 08.46 UT: m1=14.2, Dia.=1.2’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse. Cloud eventually ended observation. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Sep. 27.62 UT: m1=14.1, Dia.=0.7’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Very diffuse, slight brightening to centre, appears more condensed in good seeing. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Sep. 21.72 UT: m1=14.2, Dia.=0.7’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Difficult, visible in periods of good seeing. Diffuse coma. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Sep. 19.45 UT: m1=14.0, Dia.=1.1’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Sep. 15.46 UT: m1=14.0, Dia,=1’; DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Sep. 01.74 UT: m1=14.0, Dia.=0.8’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, opaque centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]

237P/LINEAR 237P_Mag
2016 Nov. 16.76 UT: m1=9.8, Dia.=3′, DC=2/; 20-cm SCT (77x); Juan José González (Gamoniteiro – Sierra del Aramo, alt. 1730 m, Asturias, España) [Crepúsculo astronómico. Altura sobre el horizonte: 12º. Cielo muy claro de montaña]
2016 Nov. 05.38 UT: m1=12.0, Dia.=0.7′, DC=3; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2016 Nov. 04.38 UT: m1=[11.6; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2016 Nov. 01.40 UT: m1=12.5, Dia.=1’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre]
2016 Oct. 31.41 UT: m1=12.3, Dia.=0.9’, DC=3; 25cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, close to bright stars. Weakly condensed. Low altitude = 15.4°]
2016 Oct. 29.78 UT: m1=10.6, Dia.=3′, DC=2, no cola; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2016 Oct. 26.78 UT: m1=9.5, Dia.=6′, DC=2/; 20-cm SCT (77x); Juan José González (Pandorado, alt. 1190 m, León, España) [Fin del crepúsculo astronómico. Altura sobre el horizonte: 11º. Cielo muy claro de montaña]
2016 Oct. 25.39 UT: m1=12.5, Dia.=0.8’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia] [Coma very diffuse, weakly condensed centre, pale blue in colour. Does not enhance in Swan Band filter]
2016 Oct. 24.41 UT: m1=12.4, Dia.=0.8’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [No tail. Inner coma opaque and pale blue in colour, gradually fades to edges. Slight zodiacal light interference, low altitude = 18.2°]
2016 Oct. 23.40 UT: m1=12.3, Dia.=1.5’, DC=2/; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Poor seeing; coma showed an opaque and weakly condensed centre, pale blue in colour, fading to edges. No enhancement in Swan Band filter. No tail. Slight interference by zodiacal light]
2016 Oct. 20.41 UT: m1=12.4, Dia.=0.6′, DC=5; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2016 Oct. 19.41 UT: m1=12.5, Dia.=1’, DC=4; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Outer coma diffuse, inner coma moderately condensed and opaque, pale blue in colour. Does not enhance in Swan Band filter]
2016 Oct. 18.40 UT: m1=12.3, Dia.=0.5’, DC=4; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Outer coma diffuse, brightening to an opaque, moderately condensed inner coma. Does not enhance in Swan Band filter. Slight interference from zodiacal light]
2016 Oct. 04.43 UT: m1=12.9, Dia.=0.9’, DC=4; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, brightening to a moderately condensed centre. No tail. Does not enhance in Swan Band filter. Low altitude = 18.4°. Slight haze and windy conditions, zodiacal light interference]
2016 Oct. 02.81 UT: m1=9.6, Dia.=6′, DC=2/, Tail= 0.5 deg. in PA: 70 deg.; 20-cm SCT (77x); Juan José González (Alto del Castro, alt. 1720 m, León, España) [Altura sobre el horizonte: 13º. Cielo muy claro de montaña]
2016 Sep. 30.80 UT: m1=11.6, Dia.=2′, DC=2, no cola; 20-cm SCT (117x); Carlos Labordena (Castellón, España)
2016 Sep. 28.81 UT: m1=9.7, Dia.=5′, DC=2/, Cola: 0.2º en AP 80º; 20-cm SCT (100x); Juan José González (Alto del Castro, alt. 1720 m, León, España) [Luz zodiacal. Altura sobre el horizonte: 13º. Cielo muy claro de montaña]
2016 Sep. 28.42 UT: m1=12.7, Dia.=0.8’, DC=6; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma shows small stellar central condensation, m2 approximately 14.1. Opaque inner coma fades to edges, outer coma slightly elongated to ESE. Slight smoke haze and zodiacal light interference]
2016 Sep. 26.38 UT: m1=12.9, Dia.=0.9’, DC=6; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Small stellar central condensation visible, opaque inner coma fading to edges, slightly elongated to the ESE. Does not enhance in Swan Band filter, slight zodiacal light interference]
2016 Sep. 05.85 UT: m1=10.0, Dia.=2.5′, DC=3; 20-cm SCT (77x); Juan José González (Nogarejas, alt. 920 m, León, España) [Altura sobre el horizonte: 10º. Cielo claro de montaña]
2016 Sep. 02.83 UT: m1=11.5, Dia.=2′, DC=3, no cola; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2016 Aug. 31.79 UT: m1=13.4, Dia.=0.25′, DC=4; 60-cm L (305x); Sandor Szabo (Hungary) [Just 8 degrees above horizont, inner coma is seen only]
2016 Ago. 29.86 UT: m1=10.7, Dia.=2.5′, DC=3/; 20-cm SCT (100x); Juan José González (Pandorado, alt. 1190 m, León, España) [Altura sobre el horizonte: 11º. Cielo muy claro de montaña]
2016 Aug. 27.96 UT: m1=11.5, Dia.=2′, DC=4; 22-cm L (160x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
230P/LINEAR 230P_Mag
2016 Jan. 29.83 UT: m1=15.4, Dia.=0.15′, DC=8; 60.3-cm L (406x); Sandor Szabo (Sieggraben, Austria)
2016 Jan. 09.43 UT: m1=13.9, Dia.=0.6′, DC=4; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Ibaraki, Japan)
2015 Dec. 30.46 UT: m1=13.5, Dia.=0.9’, DC=5/; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, semi-opaque, pale blue in colour, with small faint stellar central condensation (m2 approx. 14.5) No tail]
2015 Dec. 29.88 UT: m1=13.5 DSRL, Dia.=1′; canon 1100d+300mm lens; Giuseppe Pappa (Mascalucia, Sicily, Italy)
2015 Dec. 29.46 UT: m1=13.6, Dia.=0.4’, DC=6; 25-cm L f:5 (166x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse with faint stellar centre, m2 approximately 14.2. Does not enhance in Swan Band filter, no tail. Coma visible at x83]
2015 Dec. 21.16 UT: m1=13.0, Dia.=0.6′, DC=6; 20-cm SCT (160x); Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España) [Estrellas de comparación de la fotometría APASS cercana al cometa. Estrellas de campo comprobadas en el DSS]
2015 Nov. 30.49 UT: m1=14.0, Dia.=0.3’, DC=6/; 25cm L f:5 (166x); Chris Wyatt (Walcha, NSW, Australia) [Very difficult due to average seeing conditions, visible in periods of good seeing; the coma is very small and compact with a thin fuzzy outer edge. Limiting mag = 14.8]
2015 Nov. 20.70 UT: m1=[15.4; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2015 Nov. 12.02 UT: m1=15.9, Dia.=0.1′, DC=8; 60.3-cm L (305x); Sandor Szabo (Sopron, Hungary) [Motion was checked, nearly stellar]

226P/Pigott-LINEAR-Kowalski 226P_Mag
2016 Dec. 29.95 UT: m1=14.8, Dia.=0.5’, DC=3; 60-cm L (407x); Sandor Szabo (Hungary)
2016 Nov. 04.80 UT: m1=14.5, Dia.=0.5′, DC=2; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2016 Sep. 07.03 UT: m1=16.0 CCD, Dia.=0.45′, DC=6/; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Sep. 02.08 UT: m1=14.9, Dia.=0.4′, DC=6; 30-cm L f/5 (188x); Mieczyslaw Leszek Paradowski (Dąbrowa, Poland) [NELM=6.0; DSS field stars and motion checked during a 30-min period. Faintest star 16.1 mag in FOV]
2016 Sep. 01.76 UT: m1=[13.7, negative; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2016 Sep. 01.08 UT: m1=13.9, Dia.=0.7′, DC=1; 60-cm L (305x); Sandor Szabo (Hungary)
2016 July 02.75 UT: m1=[15.2 Negative; Dia=–; DC=–; 25-cm L f:5 (166x); Chris Wyatt (Walcha, NSW, Australia) [Comet not visible; Zodiacal light interference. Not visible at x83. Stellar limiting magnitude 15.2]

217P/LINEAR 
2017 Nov. 22.96 UT: m1=15.2, Dia.=0.4′, DC=4; 60-cm L (407x); Sandor Szabo (Hungary)
2017 Oct. 28.03 UT: m1=14.0, Dia.=0.6-0.7′, DC=0-1; 0.40-m Dobsonian f/4.4 (200x); Gabor Santa (Göd, Hungary) [Very diffuse]
2017 Sep. 25.74 UT: m1=[14.0; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2017 Sep. 21.76 UT: m1=13.9, Dia.=0.8’, DC=3; 25-cm L f:5 (166x); Chris Wyatt (Walcha, NSW, Australia) [Visible in periods of good seeing, difficult, close to stars. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Sep. 03.004 UT: m1=13.4, Dia.=0.3′, DC=3; 25-cm L (266x); Danil Sidorko (Korenovsk, Russia) [SQM = 21.65]
2017 Sep. 01.77 UT: m1=13.6, Dia.=0.9’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, close to stars. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Aug. 30.72 UT: m1=12.9, Dia.=1’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, low altitude= 15.1°. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Aug. 21.12 UT: m1=12.2, Dia.=2′, DC=3; 20-cm SCT (133x); Juan Jose Gonzalez (Alto del Castro – Aralla, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. APASS comparison stars. SQM: 20.9]
2017 Aug. 19.74 UT: m1=12.8, Dia.=1’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre, low altitude = 18.6°. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Aug. 19.06 UT: m1=12.5, Dia.=1′, DC=3; 0.60-m L (184x); Gabor Santa (Hungary)
2017 Aug. 01.76 UT: m1=12.6, Dia.=1’, DC=6; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Does not enhance in Swan Band filter, coma slightly elongated to NW approximately. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 July 25.79 UT: m1=12.2, Dia.=1.4’, DC=5/6; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, opaque centre with a faintly stellar central condensation. Does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 July 24.78 UT: m1=12.1, Dia.=2.5’, DC=5/6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma does not enhance in Swan Band filter, slight interference by zodiacal light. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 July 05.79 UT: m1=12.2, Dia.=2.2’, DC=5/6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma does not enhance in Swan Band filter, central condensation sometimes stellar in good seeing, slight interference from zodiacal light and Venus glare. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 June 30.73 UT: m1=13.0, Dia.=0.7’, DC=4/5; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse with moderately condensed centre. Hint of a tail to the WSW. Low altitude = 16.9°. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 June 22.75 UT: m1=13.3, Dia.=0.8’, DC=5/6; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, opaque with small central condensation, almost stellar. Slightly elongated to the South-East approximately. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]

213P/Van Ness
2017 Sep. 25.48 UT: m1=[12.7; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2017 Aug. 14.46 UT: m1=13.5, Dia.=0.8’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, difficult due to crowded field. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 July 05.76 UT: m1=13.5, Dia.=0.7’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 June 30.64 UT: m1=13.6, Dia.=0.4’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma small and diffuse. Slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]

205P/Giacobini 205P_Mag
2015 Oct. 19.76 UT: m1=16.1: CCD, Dia.=0.3′, Tail=0.9′ in PA: 247 deg.; [T31] 0.50-m f/6.8 astrograph + CCD + focal reducer; A. Novichonok & T. Prystavski (iTelescope observatory, Q62 remotely from Siding Spring, Australia)
2015 Oct. 13.47 UT: m1=15.7: CCD, Dia.=&0.4′, Tail=&1.5′ in PA: 270 deg.; [T20] 0.1-m f/5.0 astrograph + CCD; A. Novichonok & T. Prystavski (iTelescope observatory, H06 remotely from Mayhill, U.S.A.)

190P/Mueller 190pmueller_mag
2016 Dec. 10.99 UT: m1=20.4 CCD, Dia.=0.18′, DC=9; 0.25-m L f/4.7; Sergey Shurpakov (C36, Baran’, Belarus)

174P/Echeclus  174P_Mag
2016 Oct. 31.76 UT: m1=[15.8, Negative; 60-cm L (305x); Sandor Szabo (Sopron, Hungary) [Not seen, fainter than 15.8 mag]
2016 Sep. 29.89 UT: m1=15.4, Dia.=0.3’, DC=3; 60-cm L (305x); Sandor Szabo (Sopron, Hungary)
2016 Sep. 01.72 UT: m1=15.0, Dia.=0.3′, DC=4; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2016 Sep. 01.05 UT: m1=14.9 CCD, Dia.=0.44′, DC=7/; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Sep. 01.04 UT: m1=15.4, Dia.=0.25′, DC=5; 60-cm L (305x); Sandor Szabo (Hungary)
2016 Ago. 30.09 UT: m1=14.8, Dia.=–, DC=9; 20-cm SCT (133x); Juan José González (Pandorado, alt. 1190 m, León, España) [En outburst. Apariencia estelar. Estrellas de comparación de la fotometría APASS. Estrellas de campo comprobadas en el DSS. Cielo muy claro de montaña]

151P/Helin 151P_Mag
2015 Oct. 10.65 UT: m1=16.9 CCD, Dia.=0.2′; [T31] 0.50-m f/6.8 astrograph + CCD + focal reducer; A. Novichonok & T. Prystavski (iTelescope observatory, Q62 remotely from Siding Spring, Australia)

146P/Shoemaker-LINEAR 146P_Mag
2016 Sep. 01.10 UT: m1=[16.0, NEGATIVE; 60-cm L (518x); Sandor Szabo (Hungary) [Must be fainter than 16.0 mag]

145P/Shoemaker-Levy 5
2017 Nov. 22.99 UT: m1=15.7, Dia.=0.2′, DC=1; 60-cm L (407x); Sandor Szabo (Hungary)
2017 Nov. 14.91 UT: m1=16.0, Dia.=0.1′, DC=7; 60-cm L (407x); Sandor Szabo (Hungary) [Motion was checked after 30 min., I returned to it]
2017 Aug. 19.05 UT: m1=16.0, Dia.=0.25′, DC=0; 0.60-m L (520x); Gabor Santa (Hungary) [Seen twice in this night. Datas estimated at the second time. Motion was detected in a half an hour period. Checked on a photo taken on the same night and same location by Ákos Nagy Mélykuti]

144P/Kushida 144p_mag
2017 Jan. 24.82 UT: m1=13.9, Dia.=0.9′, DC=2/; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Ibaraki, Japan)
2016 Dec. 30.18 UT: m1=13.7, Dia.=0.9’, DC=2; 60-cm L (244x); Sandor Szabo (Hungary)
2016 Dic. 05.23 UT: m1=10.8, Dia.=3′, DC=1/; 20-cm SCT (77x); Juan José González (Pico del Pozo de la Nieve – Sierra de la Bobia, alt. 1130 m, Asturias, España) [Luz zodiacal. Cielo muy claro de montaña]
2016 Dec. 02.83 UT: m1=13.3, Dia.=1.1′, DC=2; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)
2016 Dec. 01.71 UT: m1=13.7, Dia.=0.7’, DC=2/; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, slight brightening to centre. Sky slightly hazy, ground fog at observing site]
2016 Nov. 30.23 UT: m1=10.7, Dia.=4′, DC=1/; 20-cm SCT (100x); Juan José González (Les Retuertes – Sierra del Aramo, alt. 1350 m, Asturias, España) [Luz zodiacal. Cielo muy claro de montaña]
2016 Nov. 29.17 UT: m1=14.1, Dia.=0.3′, DC=3; 60-cm L (306x); Sandor Szabo (Hungary) [Small, diffuse comet]
2016 Nov. 25.24 UT: m1=10.6, Dia.=4′, DC=2; 20-cm SCT (100x); Juan José González (Sierra de Tineo, alt. 1040 m, Asturias, España) [Alguna interferencia lunar. Cielo muy claro de montaña]
2016 Nov. 25.14 UT: m1=11.3, Dia=2′, DC=2, no cola; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2016 Nov. 04.83 UT: m1=12.2, Dia.=1.0′, DC=1; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)
2016 Nov. 02.23 UT: m1=9.3, Dia.=8′, DC=2; 20-cm SCT (77x); Juan José González (Mallo de Luna, alt. 1120 m, León, España) [Luz zodiacal. Altura sobre el horizonte: 26º. Cielo muy claro de montaña]
2016 Nov. 01.72 UT: m1=12.8, Dia.=1’, DC=2/; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 10.4°; Poor seeing. Difficult due to proximity to 11.6 mag star, 1’away in P.A. 252°. Diffuse coma, slight brightening to centre]
2016 Oct. 30.20 UT: m1=11.9, Dia.=1.5′, DC=2, no cola; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2016 Oct. 20.83 UT: m1=12.6, Dia.=0.8′, DC=2; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2016 Oct. 11.74 UT: m1=12.3, Dia.=1.3’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, does not enhance in Swan Band filter. No tail. Low altitude = 8.0°]
2016 Oct. 05.75 UT: m1=12.3, Dia.=1.6’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, slight brightening to centre, no tail, does not enhance in Swan Band filter. Slight interference by twilight. Low altitude = 8.5°]
2016 Oct. 03.20 UT: m1=8.8, Dia.=8′, DC=2: 20-cm SCT (77x); Juan José González (Alto del Castro, alt. 1720 m, León, España) [Estrella de mag. 10.8 (Tycho-2) en la coma. Luz zodiacal. Altura sobre el horizonte: 19º. Cielo muy claro de montaña]
143P/Kowal-Mrkos 143pkowal-mrkos_mag
2017 Jan. 18.84 UT: m1=18.8, Dia.=0.30′, DC=8/; 0.25-m f/4.7 reflector + CCD; Sergei Shurpakov (C36, Baran’, Belarus)

141P/Machholz 141P_Mag
2015 Oct. 15.77 UT: m1=16.5: CCD, Dia.=&0.3′; [T31] 0.50-m f/6.8 astrograph + CCD + focal reducer; A. Novichonok & T. Prystavski (iTelescope observatory, Q62 remotely from Siding Spring, Australia)

118P/Shoemaker-Levy 118P_Mag
2015 Oct. 04.58 UT: m1=16.7 CCD, Dia.=0.25′; [T31] 0.50-m f/6.8 astrograph + CCD + focal reducer; A. Novichonok & T. Prystavski (iTelescope observatory, Q62 remotely from Siding Spring, Australia)

117P/Helin-Roman-Alu 117P_Mag
2016 Dec. 06.87 UT: m1=17.2 CCD, Dia.=0.29′, DC=8, Tail= 1.2’in PA: 256 deg.; 0.25-m L f/4.7; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Nov. 24.90 UT: m1=17.1 CCD, Dia.=0.10′, DC=8/; 0.25-m L f/4.7; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Sep. 10.03 UT: m1=17.5 CCD, Dia.=0.16′, DC=8/; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Sep. 06.06 UT: m1=17.7 CCD, Dia.=0.15′, DC=8/, Tail=0.35′ in PA: 269 deg.; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Aug. 31.99 UT: m1=17.9 CCD, Dia.=0.16′, DC=9, Tail=0.81′ in PA: 264 deg.; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2015 Nov. 11.94 UT: m1=14.8, Dia.=0.9′, DC=1; 50.8-cm L (307x); Sandor Szabo (Sopron, Hungary)
2015 Oct. 15.88 UT: m1=15.1: CCD, Dia.=&0.5′, Tail=1.4′ in PA: 230 deg.; [T16] 0.15-m f/7.3 refractor + CCD; A. Novichonok & T.Prystavski (AstroCamp Observatory, I89 remotely from Nerpio, Spain)

116P/Wild 4 116P_Mag
2016 July 02.39 UT: m1=13.9, Dia.=1.3’, DC=2/; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse with slightly brighter inner coma. No tail]
2016 June 28.50 UT: m1=13.9, Dia.=0.7’, DC=2/; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse with slightly brighter and opaque centre. Close to mag 13.8 star]
2016 June 25.37 UT: m1=13.7, Dia.=0.8’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse and small, slight brightening to a weakly condensed centre. Visible in periods of good seeing]
2016 June 08.69 UT: m1=13.2, Dia.=1.2’, DC=2/; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse with slightly brighter but weakly condensed centre]
2016 June 03.83 UT: m1=13.2 DSRL, Dia.=0.5′; 1100d+300mm lens; Giuseppe Pappa (Mascalucia, Sicily, Italy)
2016 June 03.55 UT: m1=[13.1; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2016 May  30.52 UT: m1=13.3, Dia.=1′, DC=4; 40.6-cm L (165x); Paul Camilleri (Warners Bay, Australia)
2016 May  30.49 UT: m1=12.4, Dia=1.6’, DC=3; 25cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse with brighter and opaque centre. Difficult due to close proximity to a pair of stars 0.8′ away in P.A. 175°, magnitudes 11.9 and 12.4 respectively]
2016 May  29.45 UT: m1=13.3, Dia.=0.9′, DC=4; 40.6-cm L (165x); Paul Camilleri (Warners Bay, Australia)
2016 May  15.75 UT: m1=13.1, Dia.=0.6′, DC=2; 40.6-cm L (165x); Paul Camilleri (Warners Bay, Australia)
2016 May  14.74 UT: m1=13.0, Dia.=0.6′, DC=2; 40.6-cm L (165x); Paul Camilleri (Warners Bay, Australia)
2016 May  13.73 UT: m1=13.0, Dia.=0.8′, DC=2; 40.6-cm L (165x); Paul Camilleri (Warners Bay, Australia)
2016 May  12.74 UT: m1=13.1, Dia.=0.7′, DC=2/; 40.6-cm L (165x); Paul Camilleri (Warners Bay, Australia)
2016 May  11.73 UT: m1=12.9, Dia.=0.7′, DC=3; 40.6-cm L (165x); Paul Camilleri (Warners Bay, Australia)
2016 May  10.74 UT: m1=12.9, Dia.=0.8′, DC=3; 40.6-cm L (165x); Paul Camilleri (Warners Bay, Australia)
2016 May  09.73 UT: m1=13.0, Dia.=0.7′, DC=4; 40.6-cm L (165x); Paul Camilleri (Warners Bay, Australia)
2016 May  06.74 UT: m1=12.9, Dia.=0.7′, DC=3/; 40.6-cm L (165x); Paul Camilleri (Warners Bay, Australia)
2016 May  05.73 UT: m1=12.8, Dia.=0.8′, DC=3; 40.6-cm L (165x); Paul Camilleri (Warners Bay, Australia)
2016 May  05.72 UT: m1=13.1, Dia.=0.9’, DC=5/; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Outer coma semi-transparent and elongated to the NW approximately, inner coma faintly stellar in periods of good seeing, No tail visible]
2016 May  04.73 UT: m1=13.7, Dia.=0.8′, DC=3; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2016 May  04.73 UT: m1=12.8, Dia.=0.6′, DC=3; 40.6-cm L (165x); Paul Camilleri (Warners Bay, Australia)
2016 May  04.66 UT: m1=12.9, Dia.=0.8’, DC=6; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Does not enhance in Swan Band filter. No tail. Coma opaque and pale blue in colour, small stellar centre offset near coma edge to East. Close to bright stars 3.5’ away in P.A. 0.2°]
2016 May  03.51 UT: m1=12.5, Dia.=0.7′, DC=3; 40.6-cm L (165x); Paul Camilleri (Warners Bay, Australia)
2016 May  01.76 UT: m1=12.8, Dia.=0.5′, DC=3; 40.6-cm L (165.8x); Paul Camilleri (Warners Bay, Australia) [Comet is brighter than last observation and rather easy to observe even with the last quarter Moon high in the eastern sky (32% Illuminated)]
2016 May  01.67 UT: m1=13.0, Dia.=0.9′, DC=3; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)

104P/Kowal 2 104P_Mag
2016 May  04.46 UT: m1=13.1, Dia.=0.5′, DC=3; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2016 Apr. 29.73 UT: m1=12.5, Dia.=1.1′, DC=3; 40.0-cm L (138x); Sandor Szabo (Hakos, Namibia)
2016 Mar. 30.78 UT: m1=12.7, Dia.=0.8′, DC=4; 60.3-cm L (244x); Sandor Szabo (Sopron, Hungary)
2016 Mar. 28.11 UT: m1=12.9, Dia.=1.0’, DC=2/; 41-cm L (70x); Alan Hale (Cloudcroft, USA)

96P/Machholz
2017 Oct. 13.39 UT: m1=11.6, Dia.=1.0’, DC=3/4; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Does not enhance in Swan Band filter. Low altitude = 5.6°. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Oct. 12.38 UT: m1=11.5, Dia.=1.3’, DC=3/4; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 8.5°; Slight twilight interference, does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]

93P/Lovas 1 93plovas_mag
2017 Mar. 26.79 UT: m1=14.9, Dia.=0.3′, DC=4; 60-cm L (306x); Sandor Szabo (Hungary)
2017 Jan. 24.40 UT: m1=[13.5, Negative; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Ibaraki, Japan)

88P/Howell 88P_Mag
2015 Nov. 11.93 UT: m1=14.0, Dia.=0.8′, DC=3; 60.3-cm L (305x); Sandor Szabo (Sopron, Hungary)
2015 Nov. 02.77 UT: m1=12.5, DC=1; 32.0-cm L f/5 (120x); Uwe Pilz (Leipzig, Germany)

81P/Wild 2 81P_Mag
2016 July 31.37 UT: m1=11.1, Dia.=2.6’, DC=2/; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre, weakly condensed. Does not enhance in Swan Band filter. No tail; Zodiacal light interference; Low altitude = 12.9°]
2016 July 28.35 UT: m1=11.2, Dia.=3.7’, DC=2/; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Outer coma transparent and diffuse, slight brightening to centre. Low altitude = 17.5°, zodiacal light interference]
2016 July 25.35 UT: m1=10.9, Dia.=2.5’, DC=3; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma enhances slight using Swan Band filter. No tail. Coma diffuse with slight brightening to centre. Low altitude = 17.9°; Zodiacal light interference]
2016 July 23.35 UT: m1=11.3, Dia.=2.7’, DC=3; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse with slightly brighter central condensation but weakly condensed. Enhances slightly in Swan Band filter. Low altitude = 17.7°; zodiacal light interference. Very windy conditions]
2016 July 02.91 UT: m1=8.1, Dia.=9′, DC=2; 20-cm SCT (77x); Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España) [Crepúsculo astronómico. Muy baja altura sobre el horizonte : 6º. Estrellas de comparación a la misma altura que el cometa. Cielo muy claro de montaña]
2016 July 02.35 UT: m1=11.2, Dia.=2’, DC=3; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Inner coma enhances in Swan Band filter. Coma slightly elongated to the East. Outer coma diffuse, brightening to an opaque and moderately condensed centre, pale aqua-blue in colour. Slight interference by zodiacal light; Altitude = 19°. No tail]
2016 June 27.92 UT: m1=8.2, Dia.=8′, DC=2/; 20-cm SCT (77x); Juan José González ( Alto del Castro – Aralla, alt. 1720 m, León, España) [Crepúsculo astronómico. Muy baja altura sobre el horizonte : 6º. Estrellas de comparación a la misma altura que el cometa. Cielo muy claro de montaña]
2016 May  31.92 UT: m1=10.2, Dia.=6′, DC=2; 20-cm SCT (77x); Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España)
2016 June 04.92 UT: m1=11.1, Dia.=4′, DC=2, no cola; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2016 May  06.37 UT: m1=12.0, Dia.=1.2′, DC=3; 40.6-cm L (165x); Paul Camilleri (Warners Bay, Australia)
2016 May  04.49 UT: m1=12.0, Dia.=1.0′, DC=3; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)
2016 May  04.37 UT: m1=12.1, Dia.=1.4’, DC=4; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma shows brightening to centre, moderately condensed. Outer coma transparent, close to mag 13.3 star. Does not enhance in Swan Band filter. No tail. Faintly visible at x39. Slight interference by zodiacal light]
2016 May  03.78 UT: m1=13.0 CCD, Dia.=1′, DC=4; 20-cm L+CCD; Danil Sidorko (Korenovsk, Russia)
2016 May  02.86 UT: m1=12.0, Dia.=1.3′, DC=1; 30.5-cm L f/4.9 (120x); J. P. Navarro Pina (Mula, Murcia, Spain)
2016 May  02.46 UT: m1=11.6, Dia.=1.9′, DC=2/; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)
2016 May  01.50 UT: m1=11.9, Dia.=1.2′, DC=3; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)

77P/Longmore 77P_Mag
2016 July 02.37 UT: m1=14.2, Dia.=0.7’, DC=2/; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre. No tail. Visible in periods of good seeing]
2016 June 28.49 UT: m1=13.7, Dia.=0.8’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [No tail; Very diffuse. Visible in periods of good seeing]
2016 June 08.36 UT: m1=13.8, Dia.=1’, DC=2/; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Moonlight; Coma very diffuse with slight brightening to centre, difficult]
2016 June 03.82 UT: m1=13.7 DSRL, Dia.=0.3′; 1100d+300mm lens; Giuseppe Pappa (Mascalucia, Sicily, Italy)
2016 May  30.51 UT: m1=13.6, Dia.=0.6′, DC=3; 40.6-cm L (165x); Paul Camilleri (Warners Bay, Australia)
2016 May  30.38 UT: m1=14.0, Dia.=0.7’, DC=3; 25-cm L f:5 (166x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse with brighter centre, opaque, visible in good seeing at x83]
2016 May  29.43 UT: m1=13.5, Dia.=0.6′, DC=3; 40.6-cm L (165x); Paul Camilleri (Warners Bay, Australia)
2016 May  06.12 UT: m1=13.0, Dia.=0.7′, DC=5; 22-cm L (160x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 May  02.49 UT: m1=13.4, Dia.=0.7′, DC=3; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2016 May  01.48 UT: m1=14.4, Dia.=0.5′, DC=3; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2016 Apr. 30.95 UT: m1=14.3, Dia.=0.7′, DC=4; 40.0-cm L (138x); Sandor Szabo (Hakos, Namibia)
2016 Apr. 08.69 UT: m1=14.6, Dia.=0.5′, DC=3; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Ibaraki, Japan)
2016 Apr. 04.68 UT: m1=13.2, Dia.=0.5′, DC=3; 40.6-cm L f/4 (165x); Paul Camilleri (Warners Bay, Australia)
2016 Apr. 02.61 UT: m1=13.0, Dia.=0.6′, DC=3; 40.6-cm L f/4 (165x); Paul Camilleri (Warners Bay, Australia)

74P/Smirnova-Chernykh 74p_mag
2017 Feb. 14.74 UT: m1=16.8, Dia.=0.33′, DC=8; 0.25m f/4.7 reflector + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2017 Jan. 18.72 UT: m1=16.1, Dia.=0.41′, DC=8; 0.25-m f/4.7 reflector + CCD; Sergei Shurpakov (C36, Baran’, Belarus)
2017 Jan. 06.88 UT: m1=16.5 CCD, Dia.=0.33′, DC=9; 0.25-m f/4.7 reflector + CCD; S. Shurpakov (Observatory C36, Baran’, Belarus)
2016 Dec. 10.94 UT: m1=16.8 CCD, Dia.=0.26′, DC=8; 0.25-m L f/4.7; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Dec. 06.95 UT: m1=17.1 CCD, Dia.=0.18′, DC=9; 0.25-m L f/4.7; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Nov. 24.97 UT: m1=17.5 CCD, Dia.=0.11′, DC=8; 0.25-m L f/4.7; Sergey Shurpakov (C36, Baran’, Belarus)

73P-BT/Schwassmann-Wachmann 3 (Fragment BT)
2017 Mar. 06.73 UT: m1=12.2, Dia.=0.9’, DC=3/4; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Faint tail visible 2.4’ in length in P.A. 265°; Inner coma appears elongated East-West. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Feb. 23.72 UT: m1=11.9, Dia.=1.1’, DC=3/4; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma elongated to the West approximately; Inner coma opaque. Does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Feb. 21.23 UT: m1=9.8, Dia.=3.5′, DC=2; 20-cm SCT (100x); Juan Jose Gonzalez (Alto de la Camperona, Leon, Spain; Alt. 1600 m, 42º 51′ N, 5º 12′ W) [Sidgwick method. Tycho-2 comparison stars. The visually observed faint and wide halo-like common coma of 73P is surrounding the primary and the brighter secondary component BT (this secondary is evolving after the recent outburst recorded in CCD images). Both central condensations were not individually detected in the present observation due to faintness, small separation (near 0.5 arcmin), instrumental (20 cm SCT at 100x) and observing conditions : interference from the nearby Moon (phase 0.28) and low altitude (9 deg) at the start of astronomical twilight. Field stars checked in DSS. Background star of mag 12.3 (GSC) in coma. Mountain location, very clear sky]
2017 Feb. 17.72 UT: m1=10.8, Dia.=1’, DC=2/3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Fragment BT. Moonlight. Coma small, diffuse and opaque. Slight brightening to centre, no enhancement in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]

73P/Schwassmann-Wachmann 3 73pschwassmann-wachmann_mag
2017 Apr. 05.76 UT: m1=12.3, Dia.=2.2’, DC=5; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Short tail visible 2’ in length in P.A. 260° approximately; Zodiacal light interference. Altitude= 15.6°. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Apr. 01.86 UT: m1=11.9, Dia.=1.2′, DC=3; 20-cm f/4 L (100x); Andrew Pearce (Bailup, W. Australia)
2017 Mar. 31.86 UT: m1=11.6, Dia.=2′, DC=3; 20-cm f/4 L (100x); Andrew Pearce (Bailup, W. Australia)
2017 Mar. 30.35 UT: m1=12.0, Dia.=1′, DC=4/; 22-cm L (160x); Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Nautical twilght]
2017 Mar. 27.75 UT: m1=11.9, Dia.=0.7’, DC=6; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Very faint short tail visible, 1.8’ in length in P.A. 267° approximately. Inner coma opaque with faint stellar central condensation. Zodiacal light interference and low altitude = 15.3°. *Total light combined from components 73P and 73P-bt. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Mar. 24.86 UT: m1=11.5, Dia.=1.5′, DC=3; 20-cm f/4 L (100x); Andrew Pearce (Bailup, W. Australia)
2017 Mar. 03.83 UT: m1=[10.5; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Ibaraki, Japan)
2017 Feb. 06.84 UT: m1=[12.2; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Ibaraki, Japan)
2017 Jan. 28.17 UT: m1=13.4, Dia.=0.6′, DC=4; 33-cm L (182x); Piotr Guzik (Koskowa Góra, Poland; Alt. 800 m, 49º 45′ N, 19º 47′ E) [Sidgwick method. APASS comparison stars. Comet faint but small and condensed. Limiting stellar magnitude in comets vicinity ~15.2 mag. Motion checked over 20 minutes. SQM: 20.9 at zenith]
2017 Jan. 24.84 UT: m1=13.7, Dia.=0.6′, DC=2; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Ibaraki, Japan)
2017 Jan. 07.25 UT: m1=11.4, Dia.=2.5′, DC=2; 20-cm SCT (133x); Juan Jose Gonzalez (Alto del Castro, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. APASS comparison stars. SQM : 21.4 at zenith. Faint and diffuse outer coma. Zodiacal light. Field stars checked in DSS. Mountain location, very clear sky]

71P/Clark
2017 Nov. 09.48 UT: m1=14.3, Dia.=0.5’, DC=2; 25-cm L f:5 (166x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, visible in periods of good seeing. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Oct. 26.39 UT: m1=12.7, Dia.=0.6′, DC=2; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2017 Oct. 19.45 UT: m1=13.1, Dia.=1.5’, DC=2/3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Oct. 12.40 UT: m1=13.0, Dia.=1.2’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, difficult to see. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Sep. 22.45 UT: m1=12.2, Dia.=1.9’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Busy star field, difficult. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Sep. 19.44 UT: m1=12.4, Dia.=1.6’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre. Does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Sep. 15.42 UT: m1=12.5, Dia.=1.2’, DC=2/3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Aug. 23.43 UT: m1=12.7, Dia.=1’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre. Close to background stars, possibly just seeing central portions of the coma. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Aug. 23.04 UT: m1=11.1, Dia.=2′, DC=3/; 22-cm L (160x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Aug. 19.44 UT: m1=11.8, Dia.=2.1’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Does not enhance in Swan band filter, background star in coma. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Aug. 17.42 UT: m1=11.9, Dia.=2’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Weak central condensation, diffuse coma. Does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Aug. 14.44 UT: m1=12.0, Dia.=1.6’, DC=3/4; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight interference by background stars. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Aug. 12.86 UT: m1=11.4, Dia=1.5′, DC=3, no tail; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2017 Aug. 12.40 UT: m1=12.0, Dia.=1.6’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse and semi-transparent, weakly condensed centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Aug. 10.99 UT: m1=10.9, Dia.=2′, DC=3; 22-cm L (160x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 July 26.08 UT: m1=10.6, Dia.=3′, DC=4; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 July 25.43 UT: m1=10.9, Dia.=3.2’, DC=3/4; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, moderately condensed centre. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 July 22.93 UT: m1=9.9, Dia.=2.5′, DC=4/; 20-cm SCT (77x); Juan Jose Gonzalez (Alto del Trichero – Soto y Amio, Leon, Spain; Alt. 1190 m, 42º 46′ N, 5º 53′ W) [Altitude: 10 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 20.7]
2017 July 19.91 UT: m1=10.3, Dia=2′, DC=5, no tail; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2017 July 15.01 UT: m1= 10.5, Dia.=3′, DC=4/; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 July 14.94 UT: m1=9.8, Dia.=2.5′, DC=4/; 20-cm SCT (77x); Juan Jose Gonzalez (Alto del Castro – Aralla, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Altitude: 11 deg. Mountain location, very clear sky. Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2017 July 02.04 UT: m1=10.1, Dia.=2.5′, DC=5; 20-cm SCT (77x); Juan Jose Gonzalez (Alto del Castro – Aralla, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Altitude: 6 deg. Mountain location, very clear sky. Sidgwick method. Tycho-2 comparison stars. SQM: 20.9]
2017 June 30.61 UT: m1=10.3, Dia.=3.1’, DC=6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma almost disappears in Swan Band filter. Semi-transparent outer coma, gradually brightening to an opaque centre with a small stellar central condensation. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 June 28.08 UT: m1=10.3, Dia.=4′, DC=4/; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 June 23.94 UT: m1=11.3, Dia=2.5′, DC=4, no tail; 15-cm T (60x); Carlos Labordena (Castellón, España)
2017 June 23.06 UT: m1=10.3, Dia.=4′, DC=4/; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 June 22.48 UT: m1=10.4, Dia.=3.1’, DC=5/; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Inner coma opaque, sometimes stellar at centre, outer coma fanned to the NW approximately. Centre enhances slightly in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 June 21.53 UT: m1=10.5, Dia.=2.6’, DC=5/6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma opaque at centre, semi-transparent outer coma. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 June 21.17 UT: m1= 10.3, Dia.=4′, DC=4; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 June 20.48 UT: m1=10.3, Dia.=3; 25.4-cm L (71x); David A. J. Seargent (Cowra, NSW, Australia) [Not as readily visible using Swan Band filter]
2017 June 20.45 UT: m1=10.5, Dia.=2’, DC=4; 25-cm L f:5 (x39); Chris Wyatt (Walcha, NSW, Australia) [Does not enhance in Swan band filter. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 June 14.97 UT: m1=10.4, Dia.=2.5′, DC=5; 20-cm SCT (77x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2017 June 13.93 UT: m1=10.3, Dia=1.5′, DC=4, no tail; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2017 June 12.88 UT: m1=11.2, Dia.=3′, DC=2; 30.5-cm L f/4.9 (97x); J. P. Navarro Pina (Cañadas de San Pedro, Murcia, Spain) [Sidgwick method. Lm=5.7, comet small and diffuse]
2017 May  30.14 UT: m1=10.9, Dia.=2′, DC=4/; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 May  29.71 UT: m1=11.3, Dia.=1.7’, DC=5/6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Faint tail visible, 4.3’ in length in P.A. 289°; Outer coma diffuse, brightening to an opaque centre, faintly stellar in periods of good seeing, whitish in colour. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 May  27.17 UT: m1=11.0, Dia.=1.5′, DC=5; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 May  26.51 UT: m1=11.1, Dia.=1’, DC=5/; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, bright central condensation, sometimes stellar. Coma appears larger at lower magnification. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 May  25.12 UT: m1=11.6, Dia.=1.5′, DC=5; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 May  24.43 UT: m1=12.5, Dia.=0.8’, DC=6; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Does not enhance in Swan Band filter; Outer coma opaque brightening to an opaque inner coma and stellar central condensation. Slight hint of coma elongation to the NW approximately. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 May  24.02 UT: m1=11.2, Dia.=2.2′, DC=3/; 20-cm SCT (100x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2017 May  21.93 UT: m1=[11.0, NEGATIVE: 13-cm L (65x); Alexsandr Morozov (Novozybkov, Russia) [Lm=6.19]
2017 May  20.02 UT: m1=12.1, Dia=1′, DC=5, no tail; 20-cm SCT (1380x); Carlos Labordena (Castellón, España)
2017 May  18.99 UT: m1=12.2, Dia.=1.5, DC=5; 42-cm L f:5 (81x); Martin Lehky (Czech Republic)
2017 May  18.96 UT: m1=12.1, Dia.=1.6′, DC=4; 25-cm L (150x); Danil Sidorko (Korenovsk, Russia)
2017 May  06.75 UT: m1=12.4, Dia.=1.1’, DC=6; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Hint of tail extending West, no enhancement in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 May  06.29 UT: m1=12.0, Dia.=1.5′, DC=4; 22-cm L (160x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 May  04.74 UT: m1=12.2, Dia.=1.2′, DC=6; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)
2017 Apr. 28.76 UT: m1=12.7, Dia.=1.3’, DC=6; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Apr. 28.13 UT: m1=12.0, Dia.=0.9′, DC=4; 20-cm SCT (133x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W  ) [Comparison stars taken from APASS photometry. Field stars checked in DSS. Sidgwick method. SQM: 21.6 at zenith. Mountain  location, very clear sky]

67P/Churyumov-Gerasimenko 67P_Mag
2015 Nov. 20.73 UT: m1=12.5, Dia.=1.6′, DC=3; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)
2015 Nov. 12.09 UT: m1=13.3, Dia.=0.9′, DC=3, Tail=1.2’ long to PA: 160 deg.; 60.3-cm L (305x); Sandor Szabo (Sopron, Hungary)
2015 Oct. 15.14 UT: m1=11.7, Dia.=1.3′, DC=3; 20-cm SCT (100x); Juan José González (Alto del Castro, alt. 1720 m, León, España) [Altura sobre el horizonte: 16º. Estrellas de comparación tomadas de la fotometría APASS cercana al cometa. Cielo muy claro de montaña]
2015 Oct. 11.78 UT: m1=13.0, Dia.=1.0′, DC=3; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)

65P/Gunn 65P_Mag
2017 Aug. 18.82 UT: m1=13.3:, Dia.=1′, DC=0; 0.60-m L (244x); Gabor Santa (Hungary) [Comet is barely visible due to low altitude]
2017 June 30.61 UT: m1=14.1, Dia.=1’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 June 26.51 UT: m1=14.0; Dia.=0.8’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 June 22.47 UT: m1=13.9, Dia.=0.8’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Very diffuse. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 May  26.50 UT: m1=13.7, Dia.=0.9’, DC=1; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2016 May  12.88 UT: m1=16.4 CCD, Dia.=0.46′, DC=9; 15-cm L+CCD; Sergey Shurpakov (Baran’, Belarus)
2016 Apr. 29.83 UT: m1=16.6 CCD, Dia.=0.21′, DC=8/; 0.25-m Newton+CCD; Sergey Shurpakov (Baran’, Belarus)
2016 Apr. 23.94 UT: m1=16.5 CCD, Dia.=0.37′, DC=8 ; 15-cm L+CCD; Sergey Shurpakov (Baran’, Belarus)
2016 Apr. 15.99 UT: m1=16.4 CCD, Dia.=0.37′, DC=8/; 15-cm L+CCD; Sergey Shurpakov (Baran’, Belarus)

62P/Tsuchinshan 1
2017 Nov. 16.16 UT: m1=9.2, Dia.=7′, DC=2/; 25×100 B; Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [Altitude: 30 deg. In 20 cm SCT (77x) : m1=9.6, Dia.=6′, DC=2. Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2017 Nov. 14.12 UT: m1=9.6, Dia.=6′, DC=2/; 20-cm SCT (77x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1490 m, 42º 54′ N, 5º 48′ W) [Altitude: 21 deg. Before moonrise. Sidgwick method. Tycho-2 comparison stars. SQM: 20.9]
2017 Nov. 02.16 UT: m1=10.8, Dia.=2.5′, DC=2/; 25.4-cm L f:5 (64x); Maik Meyer (Limburg, Germany)
2017 Nov. 01.13 UT: m1=10.5, Dia.=2.8′, DC=2; 0.15-m R f/5 (85x); Gabor Santa (Göd, Hungary) [comet is easy to see, diffuse, round, with some condensation. 40 deg above horizon, nelm=5.5]
2017 Nov. 01.02 UT: m1=11.0, Dia.=2.2′, DC=3/; 25-cm L (150x); Danil Sidorko (Korenovsk, Russia) [SQM = 20.42]
2017 Oct. 30.72 UT: m1=11.0, Dia.=3.2’, DC=3; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 16.6°; Weakly condensed coma. Does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Oct. 30.18 UT; m1=10.9, Dia.=3′, DC=2/; 25.4-cm L f:5 (64x); Maik Meyer (Limburg, Germany)
2017 Oct. 26.77 UT: m1=11.5, Dia.=2.4′, DC=3; 40.0-cm L f/4.5 (75x); Seiichi Yoshida (Gunma, Japan)
2017 Oct. 23.22 UT: m1=10.2, Dia.=5′, DC=2; 20-cm SCT (100x); Juan Jose Gonzalez (Alto del Castro – Aralla, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Significantly brighter than expected. Altitude: 46 deg. Zodiacal light. Sidgwick method. Tycho-2 comparison stars. SQM: 20.9]

61P/Shajn-Schaldach 61P_Mag
2015 Nov. 11.96 UT: m1=14.5, Dia.=0.6′, DC=1; 50.8-cm L (307x); Sandor Szabo (Sopron, Hungary)
2015 Oct. 06.73 UT: m1=15.2 CCD, Dia.=0.6′, Tail=&2.8′ in PA: 257 deg.; [T31] 0.50-m f/6.8 astrograph + CCD + focal reducer; A. Novichonok & T. Prystavski (iTelescope observatory, Q62 remotely from Siding Spring, Australia)

57P/du Toit-Neujmin-Delporte 57P_Mag
2015 Oct. 10.65 UT: m1=15.3 CCD, Dia.=0.8′, Tail=&1.0′ in PA: 247 deg.; [T31] 0.50-m f/6.8 astrograph + CCD + focal reducer; A. Novichonok & T. Prystavski (iTelescope observatory, Q62 remotely from Siding Spring, Australia)

56P/Slaughter-Burnham 56P_Mag
2017 Jan. 07.75 UT: m1=16.6 CCD, Dia.=0.49′, DC=7/; 0.25-m f/4.7 reflector + CCD; S. Shurpakov (Observatory C36, Baran’, Belarus)
2016 Dec. 29.97 UT: m1=15.5, Dia.=0.4’, DC=2; 60-cm L (305x); Sandor Szabo (Hungary)
2016 Oct. 31.93 UT: m1=15.5, Dia.=0.3′, DC=4; 60-cm L (305x); Sandor Szabo (Sopron, Hungary)
2016 Sep. 30.94 UT: m1=15.0, Dia.=0.3’, DC=3; 60-cm L (407x); Sandor Szabo (Sopron, Hungary)
2016 Sep. 08.91 UT: m1=15.6 CCD, Dia.=0.24′, DC=8, Tail=1.2′ in PA: 262 deg.; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Sep. 05.94 UT: m1=15.8 CCD, Dia.=0.25′, DC=8; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Sep. 03.01 UT: m1=15.3 CCD, Dia.=0.32′, DC=8, Tail=1.6′ in PA: 257 deg.; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Sep. 01.06 UT: m1=15.0, Dia.=0.2′, DC=6; 60-cm L (305x); Sandor Szabo (Hungary)
2016 Aug. 31.93 UT: m1=15.6 CCD, Dia.=0.26′, DC=8/, Tail=1′ in PA: 260 deg.; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C35, Baran’, Belarus)
2016 Aug. 13.91 UT: m1=16.5 CCD, Dia.=0.23′, DC=9; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Aug. 13.02 UT: m1=16.4 CCD, Dia.=0.26′, DC=8/, Tail=1,18′ in PA=244 deg.; 25-cm L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 Aug. 07.99 UT: m1=16.3 CCD, Dia.=0.40′, DC=8/, Tail=1,3′ in PA=253 deg.; 0.25-m L f/4.7 +CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2016 July 30.91 UT: m1=16.4 CCD, Dia.=0.25′, DC=9; 0.25-m L f/4.7 +CCD; Sergey Shurpakov (C36, Baran’, Belarus)

53P/Van Briesbroeck 53P_Mag
2016 Oct. 31.76 UT: m1=15.0 Dia.=0.7′, DC=3; 60-cm L (305x); Sandor Szabo (Sopron, Hungary)
2016 Oct. 25.42 UT: m1=14.4, Dia.=0.6’, DC=1; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma getting very difficult to see. Diffuse round patch. Close to 14th magnitude star]
2016 Oct. 24.42 UT: m1=14.3, Dia.=0.9’, DC=1; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, slight hint of central brightening]
2016 Oct. 23.42 UT: m1=14.3, Dia.=1’, DC=1; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Very diffuse coma, weakly condensed, no tail]
2016 Sep. 29.81 UT: m1=14.3, Dia.=0.5’, DC=3; 60-cm L (305x); Sandor Szabo (Sopron, Hungary)
2016 Sep. 28.43 UT: m1=14.0, Dia=1’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma small and diffuse, no tail. Sky slightly hazy from smoke]
2016 Sep. 26.42 UT: m1=13.5, Dia.=1’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse and difficult, no tail]
2016 Sep. 01.51 UT: m1=14.0, Dia.=0.6′, DC=2; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2016 Aug. 30.90 UT: m1=13.9, Dia.=1.0′, DC=1; 35-cm L (178x); Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 29.96 UT: m1=13.8, Dia.=0.5′, DC=3; 35-cm L (178x); Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 28.91 UT: m1=13.4, Dia.=0.7′, DC=4; 30-cm L f/5 (167x); Mieczyslaw Leszek Paradowski (Dąbrowa, Poland)
2016 Aug. 27.95 UT: m1=13.8, Dia.=0.7′, DC=1/; 35-cm L (178x); Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 26.95 UT: m1=13.5, Dia.=0.6′, DC=2; 35-cm L (178x); Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 26.89 UT: m1=13.1, Dia.=0.64′, DC=5; 30-cm L f/5 (167x); Mieczyslaw Leszek Paradowski (Dąbrowa, Poland)
2016 Aug. 25.92 UT: m1=13.2, Dia.=0.7′, DC=2/; 35-cm L (178x); Jakub Černý (Senohraby, Czech Republic)
2016 Aug. 25.89 UT: m1=13.2, Dia.=0.7′, DC=1; 60-cm L (244x); Sandor Szabo (Hungary)
2016 Aug. 12.72 UT: m1=13.3, Dia.=1.4’, DC=6; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse with small faint stellar central condensation, opaque inner coma. Easily visible at x83]
2016 Aug. 08.53 UT: m1=13.4, Dia.=1.4’, DC=6; 25cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, brightens to an opaque inner coma with a faint stellar central condensation, m2= 14.8 approximately. Does not enhance in Swan Band filter, no tail visible. Coma visible at x39 but best observed at x83 due to faint stars nearby]
2016 Aug. 03.12 UT: m1=12.5, Dia.=1′, DC=4; 22-cm L (160x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 July 31.42 UT: m1=13.5, Dia.=1’, DC=4; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, moderately condensed centre, sometimes appears faintly stellar in good seeing. No tail]
2016 July 29.49 UT: m1=13.4, Dia.=0.6’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse with slight brightening to centre]
2016 July 28.44 UT: m1=13.5, Dia.=0.7’, DC=2/; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slightly brighter in centre]
2016 July 25.41 UT: m1=13.6, Dia.=1’, DC=2/; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma small, diffuse with slight brightening to centre, no tail]
2016 July 03.02 UT: m1=12.9, Dia.=0.9′, DC=3; 20-cm SCT (133x); Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España) [Estrellas de comparación de la fotometría APASS]
2016 July 02.51 UT: m1=13.4, Dia.=0.8’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma small and opaque with slightly brighter centre. No tail. Faintly visible at x39, does not enhance in Swan band filter]
2016 June 28.53 UT: m1=13.5, Dia.=0.8’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Does not enhance in Swan Band filter; Outer coma faint and brightening slightly to weakly condensed inner coma. No tail. Sky hazy although transparent, ground fog present]
2016 June 08.74 UT: m1=14.4, Dia.=0.6’, DC=3; 25-cm L f:5 (166x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse and weakly condensed; difficult to see except in periods of good seeing where it is easily viewed. No tail]
50P/Arend 50P_Mag
2015 Oct. 10.65 UT: m1=17.3 CCD; [T31] 0.50-m f/6.8 astrograph + CCD + focal reducer; A. Novichonok & T. Prystavski (iTelescope observatory, Q62 remotely from Siding Spring, Australia)

47P/Ashbrook-Jackson
2017 Nov. 22.88 UT: m1=15.3, Dia.=0.25′, DC=5; 60-cm L (407x); Sandor Szabo (Hungary)
2017 Nov. 14.83 UT: m1=15.2, Dia.=0.15′, DC=3; 60-cm L (306x); Sandor Szabo (Hungary)

45P/Honda Mrkos Pajdusakova 45p_mag
2017 Apr. 04.83 UT: m1=18.4 CCD, Dia.=0.33′, DC=6/; 0.25-m f/4.7 reflector + CCD; Serguey Shurpakov (Observatory C36, Baran’, Belarus)
2017 Mar. 22.61 UT: m1=13.6, Dia.=1.0′, DC=0; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Ibaraki, Japan)
2017 Mar. 20.05 UT: m1=11.0, Dia.=3′, DC=1/; 20-cm SCT (77x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. APASS comparison stars. SQM: 21.7 at zenith. Very faint and diffuse elongated coma. Field stars checked in DSS. Mountain location, very clear sky]
2017 Mar. 16.82 UT: m1=15.1 CCD, Dia.=0.61′, DC=6/, Tail= 7′ in PA: 285 deg.; 0.25-m f/4.7 reflector + CCD; S. Shurpakov (Observatory C36, Baran’, Belarus)
2017 Mar. 15.78 UT: m1=13.0:, Dia.=&2′, DC=2; 33-cm L (67x); Piotr Guzik (Koskowa Góra, Poland; Alt. 810 m, 49º 45′ N, 19º 47′ E) [Faint and diffuse, magnitude uncertain because of close proximity of relatively bright star. SQM-L: 21.0 at zenith. Sidgwick method, APASS comparison stars]
2017 Mar. 14.86 UT: m1=10.5, Dia=5′, DC=2, no tail; 20-cm SCT (50x); Carlos Labordena (Castellón, España)
2017 Mar. 13.73 UT: m1=16.0 CCD, Dia.=0.30′, DC=7; 0.25-m f/4.7 reflector + CCD; S. Shurpakov (Observatory C36, Baran’, Belarus)
2017 Mar. 08.68 UT: m1=10.5, Dia.=5.5’, DC=2; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma very large, transparent outer coma, diffuse but slightly brighter inner coma. Faint elongation to the SE approximately. Observation ended by cloud. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= S; Cat= TK]
2017 Mar. 03.94 UT: m2=13.3 CCD, Dia.=1.5′, DC=6/, Tail= 7′ in PA: 276 deg.; 0.25-m f/4.7 L + CCD; Sergey Shurpakov (Observatory C36, Baran’, Belarus)
2017 Mar. 03.73 UT: m1=10.7, Dia.=6′, DC=0/; 40.0-cm L f/4.5 (36x); Seiichi Yoshida (Ibaraki, Japan)
2017 Mar. 02.14 UT: m1=8.2, Dia.=12′, DC=2; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Mar. 01.96 UT: m1=9.8, Dia.=7×20′, DC=0-1; 15.3-cm R (38x) & 25.4-cm L (60x); Gabor Santa (Göd, county Pest, Hungary) [Tail: ~12′ or elongated coma, PA 280), elongated drop-like, very diffuse, “head” is slightly brighter) 38x, 153/750 refractor (m1 and dia.), 60x, 254/1200 reflector (sketch). Nelm:6.1, 70 deg above horizon, SQM=19.8]
2017 Feb. 28.86 UT: m1=8.2, Dia.=8′, DC=2; 25×100 B; Juan Jose Gonzalez (Collada Pandenes – Cabrales, Asturias, Spain; Alt. 474 m, 43º 25′ N, 5º 47′ W)  [Sidgwick method. Tycho-2 comparison stars. SQM: 20.9 at zenith. Rural dark sky location, clear sky]
2017 Feb. 28.01 UT: m1=9.7, Dia.=20′, DC=1; 30.5-cm L f:4.9 (47x); J. P. Navarro Pina (El Palmar, Murcia, Spain)
2017 Feb. 27.78 UT: m1=8.6, Dia.=14′, DC=1/; 20×100 B; Martin Lehky (Czech Republic)
2017 Feb. 27.55 UT: m1=9.4, Dia.=12′, DC=1; 20-cm Dobson; Con Stoitsis (Melbourne, Australia) [Very Large and diffused, looks fainter than actually is my previous mag estimate may of been conservative]
2017 Feb. 27.04 UT: m1=8.2, Dia.=&20′, DC=1; 10×50 B; Piotr Guzik (Koskowa Góra, Poland; Alt. 810 m, 49º 45′ N, 19º 47′ E) [Very large and diffuse, but still relatively easy to see. Excellent transparency. SQM-L: 21.3 at zenith]
2017 Feb. 25.96 UT: m1=10.0 DSLR, Dia.=7.8′, Tail= 0.28 deg. in p.a. 280 deg.; 6.8-cm R + DSLR V, f/4.8; Mieczyslaw Leszek Paradowski (Lublin, Poland)
2017 Feb. 25.83 UT: m2=12.5 CCD, Dia.=1.26′, DC=6/, Tail= 9.8′ in PA: 289 deg.; 0.25-m f/4.7 reflector + CCD; S. Shurpakov (Observatory C36, Baran’, Belarus)
2017 Feb. 24.98 UT: m1=8.4, Dia.=&15′, DC=2, Tail= 0.5 deg. in PA:~250 deg.; 10×50 B; Piotr Guzik (Teodorów, Poland, Alt. 287 m, 50º 27′ N, 20º 18′ E) [Sidgwick method used. Still relatively easy to see in 10×50 binoculars, faint broad dust tail barely visible. Excellent transparency. SQM: 21.3 at zenith]
2017 Feb. 24.97 UT: m2=12.7 CCD, Dia.=1.55′, DC=6/, Tail= 6′ in PA: 286 deg.; 0.25-m f/4.7 reflector + CCD; S. Shurpakov (Observatory C36, Baran’, Belarus)
2017 Feb. 24.93 UT: m1=10.0:, Dia.=5′, DC=1; 25.4-cm L f:5 (64x); Maik Meyer (Limburg, Germany)
2017 Feb. 24.93 UT: m1=[10.2, NEGATIVE, Dia.=5.0′; 20×80 B; Marek Biely (Brno, Czech Republic, 244 m.a.s.l.) [Already not visible for me. Fainter than 10.2 mag.]
2017 Feb. 24.91 UT: m1=7.8, Dia.=12′, DC=2; 10×50 B; Juan Jose Gonzalez (Villasecino, Leon, Spain; Alt. 1220 m, 42º 58′ N, 6º 01′ W) [Sidgwick method. Tycho-2 comparison stars. SQM : 21.3 at zenith. Dust tail: 1.2-deg in p.a. 290 deg. Mountain location, very clear sky]
2017 Feb. 24.77 UT: m1=9.3, Dia.=8.2’, DC=1/; 25-cm L f:5 (70x); Danil Sidorko (Korenovsk, Russia)
2017 Feb. 24.89 UT: m1=8.1, Dia.=14′, DC=2; 20×80 B; Neil Norman (Ipswich, Suffolk, England)
2017 Feb. 23.96 UT: m1=7.5, Dia.=20×30′, DC=0-1; 15×70 B & 10.2-cm R (20x); Gabor Santa (Göd, county Pest, Hungary) [Elongated to East-West. Nelm: 5.7, 65 deg above horizon]
2017 Feb. 23.90 UT: m1=8.0, Dia.=17′, DC=2; 20×80 B; Neil Norman (Ipswich, Suffolk, England)
2017 Feb. 23.64 UT: m1=8.0, Dia.=22.1’, DC=1; 7×50 B; Chris Wyatt (Walcha, NSW, Australia) [Very diffuse, coma elongated to WNW approximately. Enhances slightly in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= S; Cat= TK]
2017 Feb. 22.85 UT: m1=7.7, Dia.=12′, DC=2; 10×50 B; Juan Jose Gonzalez (Alto de la Colladona, Asturias, Spain; Alt.910 m, 43º 11′ N, 5º 37′ W) [Sidgwick method. Tycho-2 comparison stars. SQM : 21.1 at zenith. Fanned dust tail spanning from 270 deg. to 290 deg., 0.7-deg in p.a. 290 deg. Mountain location, very clear sky]
2017 Feb. 22.19 UT: m1=8.6, Dia.=10′, DC=2; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Feb. 21.22 UT: m1=7.8, Dia.=12′, DC=2; 10×50 B; Juan Jose Gonzalez (Alto de la Camperona, Leon, Spain; Alt. 1600 m, 42º 51′ N, 5º 12′ W) [Sidgwick method. Tycho-2 comparison stars. SQM : 21.4 at zenith. Mountain location, very clear sky]
2017 Feb. 20.57 UT: m1=7.6, Dia.=15.1’, DC=2; 7×50 B; Chris Wyatt (Walcha, NSW, Australia) [Enhances in Swan Band filter, coma slightly elongated to the West approximately. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= S; Cat= TK]
2017 Feb. 19.00 UT: m1=8.3, Dia.=&10′, DC=1/; 25.4-cm L f:5 (64x); Maik Meyer (Limburg, Germany)
2017 Feb. 17.99 UT: m1=7.3, Dia.=19′, DC=2, no tail; 8-cm B (11x); Carlos Labordena (Castellón, España)
2017 Feb. 17.85 UT: m2=14.0 CCD, Dia.=1.1′, DC=6; 20-cm L+CCD; Danil Sidorko (Korenovsk, Russia) [nuclear measured bright]
2017 Feb. 16.96 UT: m1=7.5, Dia.=15′, DC=2; 10×50 B; Juan Jose Gonzalez (Alto de la Camperona, Leon, Spain; Alt. 1600 m, 42º 51′ N, 5º 12′ W) [Sidgwick method. Tycho-2 comparison stars. SQM : 21.4 at zenith. Mountain location, very clear sky]
2017 Feb. 16.83 UT: m2=14.2 CCD, Dia.=1′, DC=6/; 20-cm L+CCD; Danil Sidorko (Korenovsk, Russia) [nuclear measured bright]
2017 Feb. 16.04 UT: m1=8.1, Dia.=10′, DC=1/; 25×100 B; Martin Lehky (Czech Republic)
2017 Feb. 15.91 UT: m1=7.1, Dia.=30.0′, DC=d1; 5.0-cm B (7x); Uwe Pilz (Leipzig, Germany)
2017 Feb. 15.90 UT: m1=7.0, Dia.=25′, DC=2; 20×80 B; Neil Norman (Ipswich, Suffolk, England)
2017 Feb. 15.88 UT: m1=8.9, Dia.=15′, DC=0/; 20×80 B; Marek Biely (Brno, Czech Republic, 244 m.a.s.l.) [Difficult, extremely diffuse comet]
2017 Feb. 15.87 UT: m1=6.8, Dia.=&30′, DC=1; 10×50 B; Piotr Guzik (Koskowa Góra, Poland, Alt. 800 m, 49º 45′ N, 19º 47′ E) [Sidgwick method used. Easy to see, extremely large and diffuse, elongated. In 33 cm telescope, small, relatively bright central condensation visible far away from geometric center of the coma. Coma significantly “flattened”, about 30’x20′ in size. Excellent transparency. SQM: 21.1 at zenith]
2017 Feb. 15.04 UT: m1=7.9, Dia.=10′, DC=2; 25×100 B; Martin Lehky (Czech Republic)
2017 Feb. 14.84 UT: m1=13.0 CCD, Dia.=0.81′, DC=7; 0.25m f/4.7 reflector + CCD; Sergey Shurpakov (C36, Baran’, Belarus)
2017 Feb. 14.49 UT: m1=[7.3; 5-cm B (7x); Salvador Aguirre (Hermosillo, Sonora, Mexico)
2017 Feb. 14.22 UT: m1=7.8, Dia.=7′, DC=2, no tail; 8-cm B (11x); Carlos Labordena (Castellón, España)
2017 Feb. 12.50 UT: m1=7.3:, DC=2; 5-cm B (7x); Salvador Aguirre (Hermosillo, Sonora, Mexico)
2017 Feb. 11.52 UT: m1=[6.7,  5-cm B (7x); Salvador Aguirre (Hermosillo, Sonora, Mexico)
2017 Feb. 10.53 UT: m1=6.7:, Dia.=&15′, DC=3/; 5-cm B (7x); Salvador Aguirre (Hermosillo, Sonora, Mexico)
2017 Feb. 10.04 UT: m1=6.5 CCD, Dia.=6′, DC=2; 20-cm L+CCD; Danil Sidorko (Korenovsk, Russia) [very clear sky]
2017 Feb. 09.51 UT: m1=6.5, Dia.=11′, DC=2/; 5-cm B (7x); Salvador Aguirre (Hermosillo, Sonora, Mexico)
2017 Feb. 08.24 UT: m1=6.7, Dia.=22′, DC=2; 6×40 monocular; Juan Jose Gonzalez (Cea, Leon, Spain, Alt. 880 m, 42º 28′ N, 5º 0′ W) [Sidgwick method. Tycho-2 comparison stars. SQM : 21.7 at zenith. Rural dark sky location)
2017 Feb. 08.23 UT: m1=8.3, Dia.=6′, DC=2, no tail; 8-cm B (11x); Carlos Labordena (Castellón, España)
2017 Feb. 06.82 UT: m1=7.9, Dia.=11′, DC=1; 40.0-cm L f/4.5 (36x); Seiichi Yoshida (Ibaraki, Japan)
2017 Feb. 06.83 UT: m1=6.9, Dia.=16′, DC=2; 10x70R; Seiichi Yoshida (Ibaraki, Japan)
2017 Jan. 07.77 UT: m1=6.1, Dia.=6.5′, DC=6; 20×80 B; J. P. Navarro Pina (Campos del Rio, Murcia, Spain) [Lightmoon 85 deg. distance , Sidgwick method , Altitude 7º , NLM=5.0]
2017 Jan. 07.64 UT: m1=6.8, Dia.=8′, DC=4/5; 7-cm B (15x); Danil Sidorko (Korenovsk, Russia) [alt. 8.5°, very clear sky]
2017 Jan. 06.77 UT: m1=6.5, Dia.=3′, DC=6/; 10×50 B; Juan Jose Gonzalez (Collada de la Cobertoria, Asturias, Spain; Alt. 1190 m, 43º 09′ N, 5º 54′ W) [Morris method. Tycho-2 comparison stars at the same low altitude (9 deg) as the comet. SQM: 20.0 at zenith. Moonlight interference. Mountain location, very clear sky]
2017 Jan. 06.72 UT: m1=6.3, Dia.=5′, DC=4/; 10×50 B; Maik Meyer (Eppenrod, Germany) [comet 7 deg above horizon, comp. stars w/in 0.5 deg height]
2017 Jan. 05.77 UT: m1=6.3, Dia.=3.2′, DC=4/; 20×60 B; José J. Chambó (Benali, Valencia, España)
2017 Jan. 05.76 UT: m1=6.8, Dia.=3′, DC=7, no tail; 8-cm B (11x); Carlos Labordena (Castellón, España)
2017 Jan. 05.76 UT: m1=7.0, Dia.=3′, DC=7, no tail; 8-cm B (11x); Carlos Labordena (Castellón, España)
2017 Jan. 05.75 UT: m1=6.3, Dia.=4.5′, DC=9; 20×80 B; J. P. Navarro Pina (Campos del Rio, Murcia, Spain) [Lightmoon 65 deg. distance, Sidgwick method, Tycho-2 stellar catalogue stars 6350-1500-1 , 6350-1098-1]
2017 Jan. 03.77 UT: m1=6.8, Dia.=2.5′, DC=7; 10×50 B; Juan Jose Gonzalez (Linares – Proaza, Asturias, Spain; Alt. 843 m, 43º 16′ N, 6º 02′ W) [Morris method. Tycho-2 comparison stars at the same low altitude (9 deg) as the comet. SQM: 20.6 at zenith. Some moonlight interference. Mountain location, very clear sky]
2017 Jan. 01.76 UT: m1=7.1, Dia.=6.5′, DC=6; 20×80 B; J. P. Navarro Pina (Campos del Rio, Murcia, Spain) [Sidgwick method, comet low altitude, tycho-2 stellar catalogue]
2017 Jan. 01.69 UT: m1=6.9, Dia.=2.0′; 32-cm reflector; Uwe Pilz (Leipzig, Germany)
2016 Dec. 31.77 UT: m1=6.9, Dia.=2.5′, DC=7; 10×50 B; Juan Jose Gonzalez (Linares – Proaza, Asturias, Spain; Alt. 843 m, 43º 16′ N, 6º 02′ W) [Altitude: 10 deg. Morris Method. Tycho-2 comparison stars at the same low altitude as the comet. SQM: 21.1 at zenith. Zodiacal light. Mountain location, very clear sky]
2016 Dec. 31.76 UT: m1=7.6, Dia.=6′, DC=3; 20×80 B; J. P. Navarro Pina (El Palmar, Murcia, Spain) [Sidgwick method, comet low altitude, tycho-2 stellar catalogue]
2016 Dec. 31.70 UT: m1=7.1, Dia.=2.6′, DC=6/, Tail= 0.67 deg. in PA: 80 deg.; 25×100 B; Jakub Cerny (Senohraby, Czech Republic)
2016 Dec. 31.45 UT: m1=7.2; 25×100 B; David A. J. Seargent (Cowra, NSW, Australia)
2016 Dec. 30.77 UT: m1=7.0, Dia.=2.5′, DC=7; 10×50 B; Juan Jose Gonzalez (Collado del Fresno – Sierra del Aramo, Asturias, Spain; Alt. 1240 m, 43º 10′ N, 5º 54′ W) [Altitude: 10 deg. Morris Method. Tycho-2 comparison stars at the same low altitude as the comet. SQM: 21.1 at zenith. Zodiacal light. Mountain location, very clear sky]
2016 Dec. 30.43 UT: m1=7.2, Dia.=2.2’, DC=5/; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Low altitude= 7.7°; Enhances well in Swan Band filter, faint tail traced to 13.5’ in length in P.A. 085° approximately. Faint outer coma, brightening to an opaque inner coma, aqua-blue in colour with a small stellar central condensation. Slight interference by twilight. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2016 Dec. 29.97 UT: m1=7.4, Dia.=3′, DC=4/; 11X80 B; José G. de S. Aguiar (Campinas, Brasil)
2016 Dec. 29.96 UT: m1=7.2, Dia.=5′, DC=5/, Tail= 0.1º in PA: 75; 20X100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Nautical Twilight, Sun altitude: -12º /Comet altitude: 15º]
2016 Dec. 29.77 UT: m1=7.1, Dia.=2.5′, DC=7; 10×50 B; Juan Jose Gonzalez (Salcedo – Sierra del Aramo, Asturias, Spain; Alt. 1140 m, 43º 11′ N, 5º 57′ W) [Altitude: 10 deg. Morris Method. Tycho-2 comparison stars at the same low altitude as the comet. SQM: 21.1 at zenith. Zodiacal light. Mountain location, very clear sky]
2016 Dec. 29.74 UT: m1=7.5, Dia.=8′, DC=6; 20×80 B; J. P. Navarro Pina (Sangonera la Verde, Murcia, Spain) [Sidgwick method, comet low altitude, tycho-2 stellar catalogue]
2016 Dec. 29.69 UT: m1=7.2, Dia.=3.5’, DC=D7; 15×70 B & 25-cm L (92x); Gabor Santa (Göd, Pest county, Hungary) [Tail: 8-9’ to PA 80. Coma has very strong green colour in the newtonian telescope. Nelm at the comet: 4m]
2016 Dec. 29.69 UT: m1=7.3, Dia.=2.2’, DC=6; 25-cm L (31x); Sandor Szabo (Hungary) [Tail: 10’ to 75-80 deg.]
2016 Dec. 29.43 UT: m1=7.4, Dia.=2.2’, DC=5/; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 6.7°; Faint tail visible, just above background threshold, traced to 14.5’in P.A. 079° approximately. Faint stellar central condensation visible in good seeing, opaque inner coma, aqua-blue in colour and enhances well in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2016 Dec. 28.95 UT: m1=7.3, Dia= 3′, DC=5; 15×70 B; Willian Souza (Sao Paulo, Brazil)
2016 Dec. 28.77 UT: m1=7.2, Dia.=3′, DC=7; 10×50 B; Juan Jose Gonzalez (Gamoniteiro – Sierra del Aramo, Asturias, Spain; Alt. 1710 m, 43º 11′ N, 5º 55′ W) [In 25x100B: m1=7.5. Altitude: 10 deg.. Morris Method. Tycho-2 comparison stars at the same low altitude as the comet. SQM: 20.9 at zenith. Zodiacal light. Mountain location, very clear sky]
2016 Dic. 28.77 UT: m1=7.9, Dia=3′, DC=6, Cola=8′; 15-cm T (44x); Carlos Labordena (Castellón, España)
2016 Dic. 28.76 UT: m1=7.8, Dia=2.5′, DC=6, no cola; 8-cm B (11x); Carlos Labordena (Castellón, España)
2016 Dec. 28.69 UT: m1=7.3, Dia.=2′, DC=7/; 20×80 B & 10-cm R (55x); Gabor Santa (Göd, Pest county, Hungary) [Tail= 4′ to PA: 80]
2016 Dec. 27.43 UT: m1=7.5, Dia.=2′, DC=6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Outer coma diffuse, brightening to a well condensed centre, aqua-blue in colour. Enhances strongly in Swan Band filter. Faint tail traced to 13’ in P.A.: 078° approximately. Low altitude= 7.3°, slight interference by zodiacal light. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2016 Dec. 26.96 UT: m1=7.6, Dia.=3′, DC=5; 25X100 B; José G. de S. Aguiar (Campinas, Brasil)
2016 Dec. 26.96 UT: m1=7.3, Dia.=3′, DC=4/; 7X50 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Nautical Twilight, Sun altitude: -12 º /Comet altitude: 17 º]
2016 Dec. 26.77 UT: m1=7.3, Dia.=4′, DC=6/; 10×50 B; Juan José González (Alto del Castro, alt. 1720 m, León, España; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Método Morris. Estrellas de comparación Tycho-2 situadas a la misma altitud (9º) que el cometa. SQM zenital: 21.2. En 20-cm SCT (77x): Condensación central cuasi-estelar : m2=9.5:(Tycho-2), Cola: 1.6º en AP 80º. Luz zodiacal. Cielo muy claro de montaña]
2016 Dec. 25.97 UT: m1=7.8, Dia.=3′, DC=5; 25X100 B; José G. de S. Aguiar (Campinas, Brasil)
2016 Dec. 25.46 UT: m1=7.0; 25×100 B; David A. J. Seargent (Cowra, NSW, Australia) [Moderately enhanced through Swan band filter. Very low elevation. Magnitude estimate rather approximate]
2016 Dec. 23.96 UT: m1=8.4, Dia.=3′, DC=4/; 25X100 B; José G. de S. Aguiar (Campinas, Brasil)
2016 Dec. 23.76 UT: m1=8.2, Dia.=4.0′, DC=6; 20X80 B; J. P. Navarro Pina (El Palmar, Murcia, Spain) [Altitude 10º]
2016 Dic. 23.76 UT: m1=8.6, Dia=3′, DC=6, Cola=5′; 15-cm T (25x); Carlos Labordena (Castellón, España)
2016 Dic. 23.75 UT: m1=8.4, Dia=2.5′, DC=5, no cola; 8-cm B (11x); Carlos Labordena (Castellón, España)
2016 Dec. 22.75 UT: m1=8.3, Dia.=3.5′, DC=9; 30.5-cm L f/4,9 (47x); J. P. Navarro Pina (Campos del Rio, Murcia, Spain) [Very condensed, Lm=6.0, Beyer’s method, stellar catalog Tycho-2]
2016 Dec. 22.68 UT: m1=8.1, Dia.=3′, DC=6; 33-cm L (50x); Piotr Guzik (Koskowa Góra, Poland; Alt. 800 m, 49º 45′ N, 19º 47′ E) [Morris method used, comparison stars at the same low altitude as the comet. Very bright, greenish colour obvious in telescope. SQM: 20.9 at zenith]
2016 Dec. 22.68 UT: m1=7.8, Dia.=4′, DC=7; 10×50 B; Piotr Guzik (Koskowa Góra, Poland; Alt. 800 m, 49º 45′ N, 19º 47′ E) [Morris method used, comparison stars at the same low altitude as the comet. Comet easily seen in 10×50 binoculars thanks to exceptional transparency. SQM: 20.9 at zenith]
2016 Dec. 22.43 UT: m1=8.2, Dia.=1.8’, DC=6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Outer coma diffuse and appears slightly elongated to the ENE approximately, brightening to a compact centre with a faint stellar central condensation. Low altitude = 9.0°; Windy conditions, interference by cloud blowing through from the East. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2016 Dic. 22.01 UT: m1=8.4, Dia.=2.5′, DC=5; 25-cm L f:4.5 (66x); Gonzalo Vargas (Cochabamba Bolivia) [La coma aparece más densa en el centro sin llegar a ser de tipo estelar, se aprecia el color verde agua, utilice un filtro SkyGlow que me permitió apreciar la coma con más detalle evitando la dispersión atmosférica de la luz de la lejanía del centro de la ciudad]
2016 Dec. 20.43 UT: m1=8.1, Dia.=2.4’, DC=6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma shows a faint stellar central condensation, inner coma aqua-blue in colour and opaque, fading to edges. Enhances strongly in Swan Band filter. Slight interference by zodiacal light; Low altitude= 10.4°]
2016 Dec. 17.96 UT: m1=8.7, Dia.=2.5′, DC=5; 20X100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Nautical Twilight]
2016 Dec. 17.77 UT: m1=8.5, Dia.=2′, DC=6; 25×100 B; Juan José González (Alto del Trichero – Soto y Amío, Alt. 1190 m, 42º 46′ N, 5º 53′ W, León, España) [En 20-cm SCT (77x): m1=8.7, Dia.=2.5′, DC=5/, Cola= 0.15º en AP: 80º; altura sobre el horizonte: 10º. Estimado con el método Morris. Estrellas de comparación Tycho-2 situadas a la misma altitud que el cometa. SQM zenital : 21.3. Cielo muy claro de montaña]
2016 Dec. 17.43 UT: m1=8.6, Dia.=1.5’, DC=6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma well condensed, opaque in centre with small star-like central condensation, aqua-blue in colour. Enhances strongly in Swan Band filter. Low altitude = 12.2°]
2016 Dec. 17.01 UT: m1=9.2, Dia.=1.6′, DC=3; 25-cm L f/4.5 (66x); Gonzalo Vargas (Cochabamba, Bolivia)
2016 Dec. 12.74 UT: m1=10.4, Dia.=1.6′, DC=3; 30.5-cm L f/4,9 (94x); J. P. Navarro Pina (Campos del Rio, Murcia, Spain) [Full moon 115º dist. , Beyer Method’s]
2016 Dec. 03.36 UT: m1=11.0, Dia.=1.7′, DC=2; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)
2016 Dec. 04.43 UT: m1=11.1, Dia.=1.5’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Diffuse outer coma, brightening slightly to and opaque centre, weakly condensed. Pale blue in colour. Low altitude = 12.7°; Moonlight interference]
2016 Dec. 01.43 UT: m1=11.2, Dia.=1.5’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma enhances in Swan Band filter; Coma diffuse with slight brightening to centre, pale aqua-blue in colour. Slight twilight/zodiacal light interference; Low altitude = 14.9°]

43P/Wolf-Harrington 43P_Mag
2017 Jan. 24.80 UT: m1=13.6, Dia.=0.6′, DC=2/; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Ibaraki, Japan)
2016 Dec. 30.16 UT: m1=14.7, Dia.=0.5’, DC=2; 60-cm L (305x); Sandor Szabo (Hungary)
2016 Dec. 29.21 UT: m1=12.4, Dia.=1.5′, DC=3; 35-cm L (62x); Jakub Cerny (Senohraby, Czech Republic)
2016 Dec. 26.19 UT: m1=12.0, Dia.=2′, DC=1/; 20-cm SCT (100x); Juan José González (Les Retuertes – Sierra del Aramo, alt. 1350 m, Asturias, España; Alt. 1350 m, 43º 10′ N, 5º 54′ W) [Método Sidgwick. Estrellas de comparación APASS. SQM zenital: 21.3. Cielo muy claro de montaña]
2016 Dic. 05.22 UT: m1=10.5, Dia.=3′, DC=2; 20-cm SCT (100x); Juan José González (Pico del Pozo de la Nieve – Sierra de la Bobia, alt. 1130 m, Asturias, España) [Luz zodiacal. Cielo muy claro de montaña]
2016 Dec. 02.82 UT: m1=13.3, Dia.=1.0′, DC=3; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)
2016 Dec. 01.68 UT: m1=13.1, Dia.=1’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre. Coma centre appears slightly offset to the East]
2016 Nov. 30.22 UT: m1=10.3, Dia.=4′, DC=2; 20-cm SCT (77x); Juan José González (Les Retuertes – Sierra del Aramo, alt. 1350 m, Asturias, España) [Luz zodiacal. Cielo muy claro de montaña]
2016 Nov. 29.18 UT: m1=13.7, Dia.=0.7′, DC=5; 60-cm L (240x); Sandor Szabo (Hungary)
2016 Nov. 25.22 UT: m1=10.0, Dia.=5′, DC=2/; 20-cm SCT (77x); Juan José González (Sierra de Tineo, alt. 1040 m, Asturias, España) [Cielo muy claro de montaña]
2016 Nov. 25.13 UT: m1=10.8, Dia=3′, DC=2, no cola; 20-cm SCT (50x); Carlos Labordena (Castellón, España)
2016 Nov. 04.82 UT: m1=12.7, Dia.=0.7′, DC=4/; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)
2016 Nov. 01.70 UT m1=12.8, Dia.=1’, DC=2/; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre, does not enhance in Swan Band filter; Low altitude = 16.0°]
2016 Oct. 30.18 UT: m1=11.3, Dia.=2.5′, DC=2, no cola; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2016 Oct. 27.21 UT: m1=10.1, Dia.=5′, DC=2/; 20-cm SCT (100x); Juan José González (Pandorado, alt. 1190 m, León, España) [Alguna interferencia lunar. Luz zodiacal. Altura sobre el horizonte: 26º. Cielo muy claro de montaña]
2016 Oct. 20.82 UT: m1=12.9, Dia.=0.4′, DC=4; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2016 Oct. 11.73 UT: m1=12.8, Dia.=0.8’, DC=4; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, weakly condensed opaque centre offset to the East edge of the coma. Very faint tail visible approximately 1.7’in length in P.A. 303°. Low altitude = 12.9°]
2016 Oct. 05.74 UT: m1=12.5, Dia.=0.8’, DC=4; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Outer coma diffuse brightening to a weakly condensed but opaque centre and offset to the East edge of the coma. No tail. Low altitude = 13.8°. Does not enhance in Swan Band filter]
2016 Oct. 03.19 UT: m1=9.5, Dia.=6′, DC=2/; 20-cm SCT (77x); Juan José González (Alto del Castro, alt. 1720 m, León, España) [A 100x: Cola de 0.3º en AP 290º. Luz zodiacal. Altura sobre el horizonte: 20º. Cielo muy claro de montaña]
2016 Sep. 30.18 UT: m1=11.3, Dia.=3′, DC=2, no cola,; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2016 Sep. 29.19 UT: m1=9.5, Dia.=6′, DC=2/: 20-cm SCT (77x); Juan José González (Alto del Castro, alt. 1720 m, León, España) [Luz zodiacal. Altura sobre el horizonte: 20º. Cielo muy claro de montaña]
2016 Sep. 27.75 UT: m1=12.1, Dia.=1.1’, DC=3/; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 11.5°; Does not enhance in Swan Band filter. Faint outer coma brightening to a weakly condensed centre. Slight interference from rising Moon]
2016 Sep. 09.16 UT: m1=9.5, Dia.=6′, DC=3; 20-cm SCT (77x); Juan José González (Alto del Trichero, alt. 1190 m, León, España) [Luz zodiacal. Altura sobre el horizonte: 14º. Cielo muy claro de montaña]
2016 Sep. 06.16 UT: m1=9.6, Dia.=5′, DC=2/; 20-cm SCT (77x); Juan José González (Nogarejas, alt. 920 m, León, España) [Luz zodiacal. Altura sobre el horizonte: 14º. Cielo claro de montaña]
2016 Sep. 03.14 UT: m1=11.5, Dia.=4′, DC=2, no cola; 20-cm SCT (50x); Carlos Labordena (Castellón, España)
2016 Sep. 01.09 UT: m1=11.3, Dia.=0.9′, DC=4; 60-cm L (244x); Sandor Szabo (Hungary)

41P/Tuttle-Giacobini-Kresak 41ptuttle-giacobini-kresak_mag
2017 July 14.97 UT: m1=10.6, Dia.=5′, DC=2; 20-cm SCT (77x); Juan Jose Gonzalez (Alto del Castro – Aralla, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2017 July 02.05 UT: m1=10.7, Dia.=5′, DC=2; 20-cm SCT (77x); Juan Jose Gonzalez (Alto del Castro – Aralla, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.3]
2017 June 30.63 UT: m1=11.2, Dia.=4.5’, DC=3; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Slightly affected by background stars in coma. Coma diffuse, weakly condensed. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 June 26.88 UT: m1=[10.6, NEGATIVE, Dia.=3′; 20×80 B: Marek Biely (244 m.a.s.l., Brno, Czech Republic) [Already not visible. Fainter than 10.6 mag.]
2017 June 26.52 UT: m1=11.5, Dia.=4.5’, DC=2; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 June 22.74 UT: m1=11.1, Dia.=3.5’, DC=2/; 25cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Close to star. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 June 21.54 UT: m1=10.4, Dia.=5.4’, DC=2; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Very diffuse. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 June 20.94 UT: m1=10.2, Dia.=6′, DC=1; 10×100 B; Martin Lehky (Czech Republic)
2017 June 19.94 UT: m1=10.4, Dia.=4.5′, DC=1/; 10×100 B; Martin Lehky (Czech Republic)
2017 June 18.94 UT: m1=10.4, Dia.=4′, DC=1/; 10×100 B; Martin Lehky (Czech Republic)
2017 June 17.98 UT: m1=14.5 CCD, Dia.=0.30′, DC=7/; 25-cm reflector f/4.7; Sergey Shurpakov (Baran’, Belarus)
2017 June 14.95 UT: m1=9.5, Dia.=5′, DC=1; 20-cm SCT (77x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2017 June 13.92 UT: m1=10.3, Dia=6′, DC=1, no tail; 20-cm SCT (50x); Carlos Labordena (Castellón, España)
2017 June 12.94 UT: m1=9.8, Dia.=5′, DC=1/; 10×100 B; Martin Lehky (Czech Republic)
2017 June 02.99 UT: m1=9.4, Dia.=8′, DC=1; 10×100 B; Martin Lehky (Czech Republic)
2017 May  31.96 UT: m1=9.4, Dia.=8′, DC=1; 10-cm B(10x); Martin Lehky (Czech Republic)
2017 May  30.02 UT: m1=9.2, Dia.=6′, DC=1/; 10-cm B(10x); Martin Lehky (Czech Republic)
2017 May  29.73 UT: m1=9.5, Dia.=3’, DC=3; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma enhances in Swan Band filter. Transparent outer coma, semi-transparent inner coma. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= S; Cat= TK]
2017 May  28.95 UT: m1=9.2, Dia.=6′, DC=1; 10-cm B(10x); Martin Lehky (Czech Republic)
2017 May  27.95 UT: m1=9.0, Dia.=7′, DC=1/; 10-cm B(10x); Martin Lehky (Czech Republic)
2017 May  27.86 UT: m1=9.8, Dia.=4′, DC=2/; 25-cm L (42x, 70x, 150x); Danil Sidorko (Korenovsk, Russia) [SQM= 20.51]
2017 May  26.92 UT: m1=9.0, Dia.=7′, DC=1; 10-cm B(10x); Martin Lehky (Czech Republic)
2017 May  26.02 UT: m1=8.8, Dia.=8′, DC=1/; 10-cm B(10x); Martin Lehky (Czech Republic)
2017 May  25.93 UT: m1=9.7, Dia.=1.74′, DC=2/; 11-cm B (20x); Sergey Shurpakov (Baran’, Belarus)
2017 May  25.92 UT: m1=11.6 CCD, Dia.=2.19′, DC=6/; 7-cm refractor f/4.5 + CCD; Sergey Shurpakov (Baran’, Belarus)
2017 May  25.01 UT: m1=8.8, Dia.=8′, DC=1/; 10-cm B(10x); Martin Lehky (Czech Republic)
2017 May  24.09 UT: m1=7.8, Dia.=9′, DC=2; 8-cm R (20x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM : 21.5 at zenith]
2017 May 23.98 UT: m1=9.7, Dia=8′, DC=2, no tail; 15-cm T (30x); Carlos Labordena (Castellón, España)
2017 May  23.90 UT: m1=8.7, Dia.=8′, DC=1; 10-cm B(10x); Martin Lehky (Czech Republic)
2017 May  22.94 UT: m1=8.7, Dia.=8′, DC=1; 10-cm B(10x); Martin Lehky (Czech Republic)
2017 May  22.89 UT: m1=11.7, Dia.=3′, DC=1; 30.5-cm L f/4.9 (94x); J. P. Navarro Pina (Puerto de la Cadena, Murcia, Spain) [comet poor very diffuse and difficult for observed]
2017 May  21.97 UT: m1=12.1 CCD, Dia.=1.07′, DC=6/; 25-cm reflector f/4.7 + CCD; Sergey Shurpakov (Baran’, Belarus)
2017 May  21.95 UT: m1=9.6, Dia.=2.00′, DC=2; 11-cm B (20x); Sergey Shurpakov (Baran’, Belarus)
2017 May  21.94 UT: m1=12.1 CCD, Dia.=1.90′, DC=7/; 7-cm refractor f/4.5 + CCD; Sergey Shurpakov (Baran’, Belarus)
2017 May  21.88 UT: m1=9.7, Dia.=6′, DC=1/; 13-cm L (26x); Alexsandr Morozov (Novozybkov, Russia)
2017 May  19.99 UT: m1=9.6, Dia=8′, DC=3, no tail; 20-cm SCT (50x); Carlos Labordena (Castellón, España)
2017 May  19.94 UT: m1=12.0 CCD, Dia.=2.19′, DC=4/; 7-cm refractor f/4.5 + CCD; Sergey Shurpakov (Baran’, Belarus)
2017 May  19.91 UT: m1=8.4, Dia.=9′, DC=1; 10-cm B(10x); Martin Lehky (Czech Republic)
2017 May  19.89 UT: m1=9.1, Dia.=6′, DC=2; 20×80 B; Marek Biely (Brno, Czech Republic) [Observed through thin high clouds but with almost no interference]
2017 May  19.82 UT: m1=9.2, Dia.=5.2′, DC=2; 25-cm L (42x, 70x, 150x); Danil Sidorko (Korenovsk, Russia)
2017 May  18.97 UT: m1=8.9, Dia.=7′, DC=2; 42-cm L (42x); Martin Lehky (Czech Republic)
2017 May  18.96 UT: m1=8.4, Dia.=9′, DC=1/; 10-cm B(10x); Martin Lehky (Czech Republic)
2017 May  18.91 UT: m1=8.7, Dia.=8′, DC=2; 20×80 B; Marek Biely (Brno, Czech Republic) [Much fainter than before and very diffuse]
2017 May  18.83 UT: m1=9.5, Dia.=6′, DC=2; 25-cm L (42x, 70x, 150x); Danil Sidorko (Korenovsk, Russia)
2017 May  17.95 UT: m1=9.8, Dia.=2.24′, DC=2/; 11-cm B(20x); Sergey Shurpakov (Baran’, Belarus)
2017 May  17.91 UT: m1=11.7 CCD, Dia.=2.34′, DC=6/; 7-cm refractor f/4.5 + CCD; Sergey Shurpakov (Baran’, Belarus)
2017 May  15.88 UT: m1=8.9, Dia.=2.44′, DC=2/; 11-cm B(20x); Sergey Shurpakov (Baran’, Belarus)
2017 May  14.84 UT:m1=9.2:, Dia.=10′, DC=1/; 13-cm L (26x); Alexsandr Morozov (Novozybkov, Russia)
2017 May  13.95 UT: m1=11.6 CCD, Dia.=2.34′, DC=6; 7-cm refractor f/4.5 + CCD; Sergey Shurpakov (Baran’, Belarus)
2017 May  12.90 UT: m1=11.7 CCD, Dia.=2.06′, DC=6; 7-cm refractor f/4.5 + CCD; Sergey Shurpakov (Baran’, Belarus)
2017 May  11.90 UT: m1=11.4 CCD, Dia.=2.48′, DC=5/; 7-cm refractor f/4.5 + CCD; Sergey Shurpakov (Baran’, Belarus)
2017 May  09.92 UT: m1=11.3 CCD, Dia.=2.34′, DC=6/; 7-cm refractor f/4.5 + CCD; Sergey Shurpakov (Baran’, Belarus)
2017 May  08.76 UT: m1=8.3, Dia.=8.8, DC=1; 25×100 B; David A. J. Seargent (Cowra, NSW, Australia) [Well enhanced using Swan Band filter. Low surface brightness]
2017 May  06.73 UT: m1=8.8, Dia.=9.5’, DC=3/4; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Outer coma large and transparent, slightly brighter but diffused inner coma. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 May  06.21 UT: m1=7.2, Dia.=13′, DC=2, no tail; 8-cm B (11x); Carlos Labordena (Castellón, España)
2017 May  04.83 UT: m1=10.8 CCD, Dia.=2.77′, DC=6/; 7-cm refractor f/4.5 + CCD; Sergey Shurpakov (Baran’, Belarus)
2017 May  04.73 UT: m1=10.6, Dia.=5.5′, DC=1; 40.0-cm L f/4.5 (36x); Seiichi Yoshida (Gunma, Japan)
2017 May  03.88 UT: m1=10.8 CCD, Dia.=2.92′, DC=6/; 7-cm refractor f/4.5 + CCD; Sergey Shurpakov (Baran’, Belarus)
2017 May  03.83 UT: m1=8.4, Dia.=15′, DC=1/; 13-cm L (26x); Alexsandr Morozov (Novozybkov, Russia)
2017 May  03.07 UT: m1=7.0, Dia.=15′, DC=2/; 12×45 monocular; Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m,  42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.7 at zenith]
2017 May  03.02 UT: m1=8.4, Dia.=9′, DC=2; 8-cm B(10x); Martin Lehky (Czech Republic)
2017 May  02.87 UT: m1=9.6 CCD, Dia.=2.34′, DC=6/; 7-cm refractor f/4.5 + CCD; Sergey Shurpakov (Baran’, Belarus)
2017 May  02.85 UT: m1=8.6, Dia.=9.11′, DC=2/; 11-cm B(20x); Sergey Shurpakov (Baran’, Belarus)
2017 Apr. 30.95 UT: m1=8.3, Dia.=10′, DC=2; 25×100 B; Martin Lehky (Czech Republic) [Sidgwick Method]
2017 Apr. 30.27 UT: m1=7.6, Dia.=12′, DC=2; 20X100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Apr. 28.82 UT: m1=8.3, Dia.=15′, DC=1/; 13-cm L (52x); Alexsandr Morozov (Novozybkov, Russia)
2017 Apr. 28.73 UT: m1=8.1, Dia.=10’, DC=4; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Very tenuous and large outer coma, brightens gradually to an opaque inner coma. Enhances in Swan Band filter. Low altitude = 17.2°. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Apr. 28.07 UT: m1=7.1, Dia.=15′, DC=2/; 12×45 monocular; Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.6 at zenith]
2017 Apr. 26.901 TU: m1=8.9, Dia.=8′, DC=2; 20×80 B; Neil Norman (FRAS, Ipswich, England)
2017 Apr. 25.914 UT: m1=8.0, Dia.=10′, DC=3; 20×80 B; Neil Norman (FRAS, Ipswich, England)
2017 Apr. 25.03 UT: m1=8.0, Dia.=10′, DC=2; 10×80 B; Martin Lehky (Czech Republic) [Sidgwick Method]
2017 Apr. 24.917 UT: m1=7.5, Dia.=15′, DC=2; 20×80 B; Neil Norman (FRAS, Ipswich, England)
2017 Apr. 22.84 UT: m1=7.1, Dia.=15′, DC=3; 13-cm L (26x); Alexsandr Morozov (Novozybkov, Russia)
2017 Apr. 22.26 UT: m1=6.8, Dia.=18′, DC=2; 7X50 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Apr. 21.11 UT: m1=6.9, Dia.=15′, DC=3; 12×45 monocular; Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m,  42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.7 at zenith]
2017 Apr. 20.92 UT: m1=7.2, Dia.=15′, DC=2, no tail; 10.2-cm R (20x); Carlos Labordena (Castellón, España)
2017 Apr. 19.96 UT: m1=11.3 CCD, Dia=1.15′,DC=6/; 0.25-m f/4.7 reflector + CCD; Sergey Shurpakov (Observatory C36, Baran’, Belarus)
2017 Apr. 19.906 UT: m1=7.2, Dia.=15′, DC=2; 20×80 B; Neil Norman (FRAS, Ipswich, England)
2017 Apr. 19.89 UT: m1=7.3, Dia.=15′, DC=3; 20×88 B; Maik Meyer (Limburg, Germany)
2017 Apr. 19.86 UT: m1=6.9, Dia.=20′, DC=3; 13-cm L (26x); Alexsandr Morozov (Novozybkov, Russia) [S – Sidgwick`s method]
2017 Apr. 19.86 UT: m1=8.1, Dia.=10′, DC=3; 11-cm B(20x); Sergey Shurpakov (Observatory C36, Baran’, Belarus)
2017 Apr. 18.917 UT: m1=7.1, Dia.=17′, DC=2; 20×80 B; Neil Norman (FRAS, Ipswich, England)
2017 Apr. 18.89 UT: m1=7.1, Dia.=17′, DC=3/; 20×88 B; Maik Meyer (Limburg, Germany)
2017 Apr. 17.79 UT: m1=7.1, Dia.=17′, DC=3/; 13-cm L (26x): Alexsandr Morozov (Novozybkov, Russia) [M – Morris`s method]
2017 Apr. 16.76 UT: m1=6.5, Dia.=11.5′, DC=5; 25-cm L (42x, 70x); Danil Sidorko (Korenovsk, Russia)
2017 Apr. 15.868 UT: m1=7.1, Dia.=11′, DC=2; 20×80 B; Neil Norman (FRAS, Ipswich, England)
2017 Apr. 15.85 UT: m1=6.2, Dia.=25′, DC=3/; 7-cm B (15x); Danil Sidorko (Korenovsk, Russia)
2017 Apr. 14.90 UT: m1=6.5, Dia.=16′, DC=2, no tail; 10.2-cm R (20x); Carlos Labordena (Castellón, España)
2017 Apr. 14.90 UT: m1=9.5, Dia.=10′, DC=0; 30.5-cm L (97x); J. P. Navarro Pina (Campos del rio, Murcia, Spain)
2017 Apr. 13.88 UT: m1=6.6, Dia.=14′, DC=2; 20×88 B; Maik Meyer (Limburg, Germany)
2017 Apr. 13.86 TU: m1=6.2, Dia.=20′, DC=3; 20×80 B; Neil Norman (FRAS, Ipswich, England) [Before Moonrise]
2017 Apr. 12.86 UT: m1=6.6, Dia.=15′, DC=2, no tail; 8-cm B (11x); Carlos Labordena (Castellón, España)
2017 Apr. 12.85 UT: m1=6.2, Dia.=17′, DC=2/; 12×45 monocular; Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m,  42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. Astronomical twilight, before moonrise. SQM: 20.5 at zenith. Mountain location, very clear sky]
2017 Apr. 07.16 UT: m1=6.8, Dia.=22′, DC=3, no tail; 8-cm B(11x); Carlos Labordena (Castellón, España)
2017 Apr. 07.15 UT: m1=6.0, Dia.=25′, DC=2/; 12×45 monocular; Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m,  42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. Some moonlight interference. SQM: 20.4 at zenith]
2017 Apr. 05.08 UT: m1=6.7, Dia.=23′, DC=2/; 10×50 B; Maik Meyer (Limburg, Germany)
2017 Apr. 05.01 UT: m1=7.3, Dia.=10′, DC=3; 13-cm L (26x); Alexsandr Morozov (Novozybkov, Russia)
2017 Apr. 04.13 UT: m1=6.6, Dia.=17′, DC=2/; 10×50 B; Maik Meyer (Limburg, Germany)
2017 Apr. 04.10 UT: m1=6.4, Dia.=25′, DC=3; 12×45 monocular; Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m,  42º 54′ N, 5º 48′ W ) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.7 at zenith]
2017 Apr. 02.97 UT: m1=10.8 CCD, Dia.=1.93′, DC=6/; 0.15-m f/3.2 reflector + CCD; Sergey Shurpakov (Observatory C36, Baran’, Belarus)
2017 Apr. 02.14 UT: m1=7.0, Dia.=20′, DC=3, no tail; 8-cm B(11x); Carlos Labordena (Castellón, España)
2017 Apr. 02.09 UT: m1=7.2, Dia.=18′, DC=3; 20×80 B; Marek Biely (Brno, Czech Republic, 244 m.a.s.l.)
2017 Apr. 01.86 UT: m1=8.5, Dia:10′, DC=3; 30.5-cm L (47x); J. P. Navarro Pina (Bullas, Murcia, Spain)
2017 Apr. 01.16 UT: m1=6.5, Dia.=20′, DC=3; 10×50 B; Juan Jose Gonzalez (Candanedo de Fenar, Leon, Spain; Alt. 1060 m, 42º 49′ N, 5º 34′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.4 at zenith. Mountain location, very clear sky]
2017 Mar. 31.92 UT: m1=7.0, Dia.=15′, DC=1; 20X80 B; Valentín Díaz (Aspe, Alicante, España)
2017 Mar. 31.83 UT: m1=7.3, Dia.=11′, DC=5; 25-cm L (42x & 70x); Danil Sidorko (Korenovsk, Russia)
2017 Mar. 29.89 UT: m1=7.2, Dia.=15′, DC=3; 7×50 B; Francios Kugel (Dauban, France)
2017 Mar. 29.83 UT: m1=7.4, Dia.=18′, DC=5; 25-cm L (42x & 70x); Danil Sidorko (Korenovsk, Russia)
2017 Mar. 29.16 UT: m1=7.3, Dia.=20′, DC=2, no tail; 8-cm B(11x); Carlos Labordena (Castellón, España)
2017 Mar. 28.89 UT: m1=7.7, Dia.=17′, DC=2; 20×80 B; Marek Biely (Brno, Czech Republic, 244 m.a.s.l.)
2017 Mar. 28.85 UT: m1=7.7, Dia.=10′, DC=4; 13-cm L (26x); Alexsandr Morozov (Novozybkov, Russia)
2017 Mar. 28.10 UT: m1=6.5, Dia.=25′, DC=3; 5×30 monocular; Juan Jose Gonzalez (Collado del Fresno, Asturias, Spain; Alt. 1280 m, 43º 10′ N, 5º  54′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.5 at zenith]
2017 Mar. 27.86 UT: m1=7.7, Dia.=14′, DC=3; 20×80 B; Marek Biely (Brno, Czech Republic, 244 m.a.s.l.)
2017 Mar. 26.93 UT: m1=8.1, Dia.=12′, DC=2/; 20×80 B; Marek Biely (Brno, Czech Republic, 244 m.a.s.l.) [Relatively bright and large]
2017 Mar. 26.92 UT: m1=7.0, Dia.=18′, DC=4; 8×56 B; Sandor Szabo (Hungary)
2017 Mar. 26.82 UT: m1=7.0, Dia.=15′, DC=3; 8.8-cm B (20x); Mail Mayer (Limburg, Germany)
2017 Mar. 25.90 UT: m1=7.3, Dia.=17′, DC=2/; 8.8-cm B (20x); Mail Mayer (Limburg, Germany)
2017 Mar. 25.894 UT: m1=7.1, Dia.=18′, DC=4; 11.4-cm L f/8 (45x); Neil Norman (FRAS, Ipswich, England)
2017 Mar. 25.83 UT: m1=10.0, Dia.=7′, DC=6; 30.5-cm L f:4.9 (97x); J. P. Navarro Pina (El Ardal, Murcia, Spain) [altitude= 700 mts., Lm= 5.9]
2017 Mar. 24.95 UT: m1=7.5, Dia.=17′, DC=4; 13-cm L (26x); Alexsandr Morozov (Novozybkov, Russia) (Lm=6.2)
2017 Mar. 24.898 UT: m1=7.4, Dia.=15′, DC=4; 11.4-cm L f:8 (45x); Neil Norman (FRAS, Ipswich, England)
2017 Mar. 24.84 UT: m1=7.1, Dia.=19, DC=1/; 8.8-cm B (20); Maik Meyer (Limburg, Germany)
2017 Mar. 23.81 UT: m1=10.8 CCD, Dia.=15′, DC=6; 20-cm L + CCD; Danil Sidorko (Korenovsk, Russia)
2017 Mar. 23.80 UT: m1=8.2, Dia.=8.0′, DC=5/; 25-cm (42x); Danil Sidorko (Korenovsk, Russia)
2017 Mar. 23.75 UT: m1=8.9, Dia.=22′, DC=1/; 6-cm B (20x); Alexsandr Morozov (Novozybkov, Russia)
2017 Mar. 23.73 UT: m1=7.8, Dia.=18′, DC=6/; 15×70 B; Danil Sidorko (Korenovsk, Russia)
2017 Mar. 22.83 UT: m1=7.7, Dia.=15′, DC=2, no tail; 8-cm B (11x); Carlos Labordena (Castellón, España)
2017 Mar. 22.58 UT: m1=7.3, Dia.=16′, DC=2; 7.0cm R (10x); Seiichi Yoshida (Ibaraki, Japan)
2017 Mar. 22.54 UT: m1=8.3, Dia.=10′, DC=3/; 40.0-cm L f/4.5 (36x); Seiichi Yoshida (Ibaraki, Japan)
2017 Mar. 21.875 UT: m1=8.2, Dia.=5′, DC=3; 11.4-cm L f:8 (45x); Neil Norman (FRAS, Ipswich, England)
2017 Mar. 21.08 UT: m1=8.0, Dia.=8′, DC=2; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Comet altitude: 15º]
2017 Mar. 21.04 UT: m1=8.6, Dia.=22′, DC=2; 6-cm B (20x); Alexsandr Morozov (Novozybkov, Russia)
2017 Mar. 21.03 UT: m1=8.9, Dia.=10′, DC=3; 13-cm L (26x); Alexsandr Morozov (Novozybkov, Russia)
2017 Mar. 20.875 UT: m1=9.2, Dia.=7′, DC=3; 11.4-cm L f:8 (45x); Neil Norman (Ipswich, England)
2017 Mar. 20.02 UT: m1=7.5, Dia.=20′, DC=2/; 10×50 B; Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.7 at zenith]
2017 Mar. 19.88 UT: m1=7.9, Dia.=10′, DC=2, no tail; 8-cm B (11x); Carlos Labordena (Castellón, España)
2017 Mar. 19.87 UT: m1=8.0, Dia.=8′, DC=3, no tail; 20-cm SCT (50x); Carlos Labordena (Castellón, España)
2017 Mar. 18.95 UT: m1=9.6, Dia.=5′, DC=–; 30-cm L (50X); Valentín Díaz (La Romaneta, Alicante, España)
2017 Mar. 18.84 UT: m1=9.5, Dia.=5′, DC=3; 30.5-cm L f:4.9 (97x); J. P. Navarro Pina (Campos del Rio, Murcia, Spain)
2017 Mar. 17.74 UT: m1=9.4, Dia.=7′, DC=3; 13-cm L (52x); Alexsandr Morozov (Novozybkov, Russia)
2017 Mar. 16.85 UT: m1=7.6, Dia.=15′, DC=2; 8.8-cm B (20x); Maik Meyer (Limburg, Germany)
2017 Mar. 16.82 UT: m1=9.8, Dia.=5′, DC=3; 30.5-cm L f:4.9 (97x); J. P. Navarro Pina (Campos del Rio, Murcia, Spain)
2017 Mar. 15.89 UT: m1=7.8, Dia.=17′, DC=2/; 10×50 B; Juan Jose Gonzalez (Alto del Trichero – Soto y Amío, Leon, Spain; Alt. 1190 m, 42º 46′ N, 5º 53′ W) [Sidgwick method. Tycho-2 comparison stars. Mountain location, very clear sky. SQM: 21.4 at zenith]
2017 Mar. 15.81 UT: m1=11.2, Dia.=5′, DC=3; 30.5-cm L f:4.9 (97x); J. P. Navarro Pina (Campos del Rio, Murcia, Spain)
2017 Mar. 15.80 UT: m1=7.5, Dia.=20′, DC=3; 10×50 B; Piotr Guzik (Koskowa Góra, Poland; Alt. 810 m, 49º 45′ N, 19º 47′ E) [Morris method used. Very bright, easily visible in binoculars. SQM-L: 21.1 at zenith]
2017 Mar. 14.84 UT: m1=9.9, Dia.=3′, DC=4, no tail; 20-cm SCT (50x); Carlos Labordena (Castellón, España)
2017 Mar. 14.73 UT: m1=9.6, Dia.=7.5′, DC=3; 13-cm L (65x); Alexsandr Morozov (Novozybkov, Russia)
2017 Mar. 13.76 UT: m1=11.3 CCD, Dia.=1.33′, DC=6/; 0.25-m f/4.7 reflector + CCD; S. Shurpakov (Observatory C36, Baran’, Belarus)
2017 Mar. 06.97 UT: m1=9.5, Dia.=3.0′, DC=5/; 25-cm (42x); Danil Sidorko (Korenovsk, Russia)
2017 Mar. 06.95 UT: m1=10.5 CCD, Dia.=5′, DC=6; 20-cm L + CCD; Danil Sidorko (Korenovsk, Russia)
2017 Mar. 06.60 UT: m1=9.2, Dia.=7’, DC=5; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Enhances well in Swan band filter. Outer coma transparent, inner coma opaque with hints of faint stellaring in good  seeing. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Mar. 05.95 UT: m1=12.2 CCD, Dia.=6.3′, DC=6; 20-cm L + CCD; Danil Sidorko (Korenovsk, Russia)
2017 Mar. 05.93 UT: m1=9.3, Dia.=5.2′, DC=6; 25-cm (42x); Danil Sidorko (Korenovsk, Russia)
2017 Mar. 03.85 UT: m2=11.8 CCC, Dia.=1.48′, DC=6/; 0.25-m f/4.7 L + CCD; Sergey Shurpakov (Observatory C36, Baran’, Belarus)
2017 Mar. 03.72 UT: m1=10.4, Dia.=5′, DC=3; 40.0-cm L f/4.5 (36x); Seiichi Yoshida (Ibaraki, Japan)
2017 Mar. 02.10 UT: m1=10.2, Dia.=6′, DC=2; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Mar. 01.90 UT: m1=9.5, Dia.=10′, DC=s5; 15×70 B & 25.4-cm L (75x & 109x); Gabor Santa (Göd, county Pest, Hungary) [15×70 B (m1 and dia.); 25.4-cm L 75x and 109x m2 and sketch. Nelm:6.1, 73 deg above horizon, SQM=19.8]
2017 Mar. 01.82 UT: m1=10.4, Dia.=2′, DC=2; 30.5-cm L f:4.9 (97x); J. P. Navarro Pina (Campos del Rio, Murcia, Spain)
2017 Mar. 01.01 UT: m1=9.1, Dia.=7′, DC=2; 25×100 B; Juan Jose Gonzalez (Grandota – Oviedo, Asturias, Spain; Alt. 470 m, 43º 21′ N, 5º  47′ W) [Sidgwick method. Tycho-2 comparison stars. SQM: 20.3 at zenith. Rural location, clear sky]
2017 Feb. 27.80 UT: m1=10.0, Dia.=6′, DC=3; 20×100 B; Martin Lehky (Czech Republic)
2017 Feb. 27.03 UT: m1=9.2, Dia.=12′, DC=3; 10×50 B; Piotr Guzik (Koskowa Góra, Poland; Alt. 810 m, 49º 45′ N, 19º 47′ E) [Morris method used. Easy to see, significantly brighter than two days ago. Excellent transparency. SQM-L: 21.3 at zenith]
2017 Feb. 25.915 UT: m1=10.0, m2=13.5, Dia.=3.8′, DC=s4; 15.3-cm R (68x); Gabor Santa (Göd, county Pest, Hungary) [nelm: 5.7, 66 deg above horizon]
2017 Feb. 25.89 UT: m1=9.5 DSLR, Dia.=7.8′; 6.8-cm R + DSLR V, f/4.8; Mieczyslaw Leszek Paradowski (Lublin, Poland)
2017 Feb. 25.83 UT: m2=12.0 CCD, Dia.=1.33′, DC=6/; 0.25-m f/4.7 reflector + CCD; S. Shurpakov (Observatory C36, Baran’, Belarus)
2017 Feb. 24.97 UT: m1=10.2, Dia.=6′, DC=3; 27-cm L (53x); Piotr Guzik (Teodorów, Poland, Alt. 287 m, 50º 27′ N, 20º 18′ E) [Morris method used. Bright, very large. Relatively easy to see in 10×50 binoculars at m1=9.8, Dia.=10′, DC=3. Excellent transparency. SQM: 21.3 at zenith]
2017 Feb. 24.91 UT: m1=10.9, Dia.=2.5′, DC=3; 25.4-cm L f:5 (64x); Maik Meyer (Limburg, Germany)
2017 Feb. 24.90 UT: m1=9.4, Dia.=6′, DC=2; 25×100 B; Juan Jose Gonzalez (Villasecino, Leon, Spain; Alt. 1220 m, 42º 58′ N, 6º 01′ W)  [Sidgwick method. Tycho-2 comparison stars. SQM : 21.3 at zenith. Zodiacal light. Mountain location, very clear sky. In 20 cm SCT (77x): m1=10.0]
2017 Feb. 24.75 UT: m1=10.4, Dia.=4.5’, DC=2/; 25-cm L f:5 (70x); Danil Sidorko (Korenovsk, Russia)
2017 Feb. 23.90 UT: m1=9.9, Dia.=5′, DC=3; 15.3-cm R (47x); Gabor Santa (Göd, county Pest, Hungary) [nelm: 5.6, 66 deg above horizon]
2017 Feb. 23.63 UT: m1=10.5, Dia.=8.6’, DC=4; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Opaque inner coma, transparent outer coma. Central condensation appears faintly stellar at x83; Comet close to 10.3 magnitude star, slight interference. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Feb. 22.51 UT: m1=10.8, Dia.=4.7’, DC=4/5; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma slightly enhances in Swan Band filter, inner coma opaque. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Feb. 22.12 UT: m1=11.3, Dia.=3′, DC=2; 22-cm L (160x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Feb. 21.94 UT: m1=10.6, m2=13.5, Dia.=3′, DC=s4; 25.4-cm L (92x); Gabor Santa (Göd, county Pest, Hungary) [nelm: 5.7, 66 deg above horizon]
2017 Feb. 21.12 UT: m1=11.6, Dia.=2.5′, DC=2; 22-cm L (160x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Feb. 20.46 UT: m1=10.7, Dia.=5.3’, DC=4; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma large and diffuse, transparent outer coma, opaque inner coma. Enhances slightly in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Feb. 18.99 UT: m1=11.4, Dia.=1.6′, DC=3/; 25.4-cm L f:5 (104x); Maik Meyer (Limburg, Germany)
2017 Feb. 17.93 UT: m1=11.8, Dia.=1.5′, DC=3, no tail; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2017 Feb. 17.83 UT: m1=13.5 CCD, Dia.=1.7′, DC=3; 20-cm L+CCD; Danil Sidorko (Korenovsk, Russia)
2017 Feb. 17.70 UT: m1=11.7, Dia.=1.1’, DC=3/4; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Moonlight. Does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Feb. 16.84 UT: m1=10.9, Dia.=4′, DC=2; 20-cm SCT (77x); Juan Jose Gonzalez (Alto de la Camperona, Leon, Spain; Alt. 1600 m, 42º 51′ N, 5º 12′ W) [Sidgwick method. Tycho-2 comparison stars. SQM : 21.4 at zenith. Mountain location, very clear sky]
2017 Feb. 16.77 UT: m1=13.1 CCD, Dia.=1.2′, DC=3; 20-cm L+CCD; Danil Sidorko (Korenovsk, Russia)
2017 Feb. 16.76 UT: m1=12.2, Dia.=1.5′, DC=3; 25-cm (48x); Danil Sidorko (Korenovsk, Russia)
2017 Feb. 16.02 UT: m1=11.8, Dia.=2′, DC=2; 22-cm L (160x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Feb. 15.86 UT: m1=12.0, Dia.=2.5, DC=0; 35.6-cm T f:11 (98x); Alex Scholten (Bussloo, Netherlands)
2017 Feb. 15.85 UT: m1=10.8, Dia.=&4′, DC=3; 33-cm L (67x); Piotr Guzik (Koskowa Góra, Poland, Alt. 800 m, 49º 45′ N, 19º 47′ E) [Morris method used. Small (~1′), well condensed central condensation at m2~12.0 immersed in large, diffuse halo. Excellent transparency. SQM: 21.1 at zenith]
2017 Feb. 14.80 UT: m1=11.1, Dia.=&4′, DC=3; 33-cm L (67x); Piotr Guzik (Koskowa Góra, Poland, Alt. 800 m, 49º 45′ N, 19º 47′ E) [Morris method used. Small (~1′), well condensed central condensation at m2~12.0 immersed in large, diffuse halo. SQM: 20.8 at zenith]
2017 Feb. 13.75 UT: m1=12.5, Dia.=1.7′; 32.0-cm L f:5 (80x); Uwe Pilz (Leipzig, Germany)
2017 Feb. 06.78 UT: m1=13.4, Dia.=0.8′, DC=3; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Ibaraki, Japan)
2017 Jan. 31.68 UT: m1=13.5, Dia.=0.9’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse with weak central condensation. Close star of 11.1 mag, 1’ away in P.A. 338° on the edge of the coma. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Jan. 30.68 UT: m1=13.6, Dia.=0.8’, DC=2/; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight elongation to SE approximately. Slight brightening to centre; does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Jan. 29.92 UT: m1=12.8, Dia.=2.8′, DC=2/; 35-cm L (178x); Jakub Cerny (Senohraby, Czech Republic)
2017 Jan. 29.68 UT: m1=13.9, Dia.=0.7’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very small and diffuse. Does not enhance in Swan Band filter. Close to mag 13.5 star, 0.8’ away in P.A. 255°. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Jan. 28.13 UT: m1=12.6, Dia.=2′, DC=2; 33-cm L (67x); Piotr Guzik (Koskowa Góra, Poland; Alt. 800 m, 49º 45′ N, 19º 47′ E) [Sidgwick method. APASS comparison stars. Comet faint and diffuse. At 114x small, condensed central condensation of ~14.0 mag also visible. SQM: 20.9 at zenith]
2017 Jan. 27.97 UT: m1=12.1, Dia.=2.5′, DC=1; 32.0-cm L (120x); Uwe Pilz (Leipzig, Germany)
2017 Jan. 24.78 UT: m1=13.8, Dia.=0.7′, DC=3; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Ibaraki, Japan)
2017 Jan. 24.23 UT: m1=11.5, Dia.=4′, DC=1/; 20-cm SCT (133x); Juan Jose Gonzalez (Collada de la Cobertoria, Asturias, Spain; Alt. 1190 m, 43º 09′ N, 5º 54′ W) [Sidgwick method. APASS comparison stars. SQM: 21.5 at zenith. Mountain location, very clear sky]
2017 Jan. 23.86 UT: m1=13.5:, Dia.=&1.5′, DC=2; 33-cm L (67x); Piotr Guzik (Koskowa Góra, Poland; Alt. 800 m, 49º 45′ N, 19º 47′ E) [Sidgwick method used. Very faint and diffuse. SQM: 20.9 at zenith]
2017 Jan. 23.64 UT: m1=13.8, Dia.=0.8’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very small and diffuse. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]

29P/Schwassmann-Wachmann 1  29P_Mag
2017 Nov. 14.78 UT: m1=13.5, Dia.=0.5′, DC=3; 30.5-cm L (94x); J. P. Navarro Pina (Puerto de la Cadena, Murcia, Spain) [360 mts altitude]
2017 Nov. 14.73 UT: m1=13.4, Dia.=0.5′, DC=4; 60-cm L (187x); Sandor Szabo (Hungary)
2017 Oct. 26.38 UT: m1=12.9, Dia.=0.9′, DC=2/; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)
2017 Oct. 22.88 UT: m1=11.5, Dia.=2′, DC=2/; 20-cm SCT (100x); Juan Jose Gonzalez (Alto del Castro – Aralla, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Brighter inner coma diameter : 2′, providing m=11.5 (AQ). Faint and diffuse outer coma diameter : 4′, providing m=10.3: (TK), remnant of previous outbursts. Sidgwick method. Field stars checked in DSS. Altitude: 29 deg. SQM: 21.0]
2017 Oct. 19.46 UT: m1=12.0, Dia.=3.7’, DC=1; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, appears as a misty patch just above sky background threshold. Just visible at x39 so coma diameter may even be slightly larger. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Oct. 16.85 UT: m1=12.1, Dia=1.5′, DC=2, no tail; 20-cm SCT (117x); Carlos Labordena (Castellón, España)
2017 Oct. 13.81 UT: m1=11.7, Dia.=2.0′, DC=2/; 20-cm SCT (100x); Juan Jose Gonzalez (Alto del Castro – Aralla, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Brighter inner coma diameter : 2.0′, providing m=11.7 (AQ). Faint and diffuse outer coma diameter : 3′.5, providing m=10.5: (TK), remnant of previous outbursts. Sidgwick method. Field stars checked in DSS. Altitude: 33 deg. SQM: 21.0]
2017 Oct. 12.41 UT: m1=12.2, Dia.=1.8’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, slight brightening to centre. Pale blue in colour. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Sep. 27.60 UT: m1=11.9, Dia.=3’, DC=2; 25-cm L f:5 (39); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Sep. 25.49 UT: m1=[13.4; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)
2017 Sep. 22.86 UT: m1=13.7, Dia.=0.9’, DC=1; 60-cm reflector (305x); Sandor Szabo (Sopron, Hungary) [Very diffuse comet]
2017 Sep. 22.46 UT: m1=11.9, Dia.=3’, DC=2/3; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, weakly condensed opaque centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Sep. 19.89 UT: m1=12.1, Dia=1.5′, DC=3, no tail; 20-cm T (94x); Carlos Labordena (Castellón, España)
2017 Sep. 19.44 UT: m1=11.7, Dia.=3’, DC=2/3; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Does not enhance in Swan Band filter. Coma diffuse with slightly brighter and iopaque centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Sep. 15.97 UT: m1=11.8, Dia=1.5′, DC=3, no tail; 20-cm SCT (120x); Carlos Labordena (Castellón, España)
2017 Sep. 15.87 UT: m1=11.5, Dia.=2.0′, DC=4; 20-cm SCT (100x); Juan Jose Gonzalez (Cruce de Aralla – Embalse de Barrios de Luna, Leon, Spain; Alt. 1110 m, 42º 54′ N, 5º 52′ W) [In evolution after the recent outbursts. Starlike central condensation, m2=14.0: (AQ). Brighter inner coma diameter : 2.0′, providing m=11.5 (AQ). Faint and diffuse outer coma diameter : 3′.5, providing m=10.3: (TK), remnant of previous outbursts. Sidgwick method. Field stars checked in DSS. Altitude: 32 deg. SQM: 21.1]
2017 Sep. 15.44 UT: m1=11.7, Dia.=2.5’, DC=3; 25-cm L f:5 (39x): Chris Wyatt (Walcha, NSW, Australia) [Outer coma diffuse, opaque centre. Does not enhance in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Sep. 13.89 UT: m1=12.5, Dia.=2.0′, DC=6; 30.5-cm L F/5 (97x); J. P. Navarro Pina (Campos del Rio, Murcia, Spain)
2017 Sep. 13.89 UT: m1=13.2 CCD, Dia.=0.74′, DC=6/; 25-cm reflector f/4.7; Sergey Shurpakov (Baran’, Belarus)
2017 Sep. 11.05 UT: m1=11.3, Dia.=2′, DC=4; 22-cm L (160x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Sep. 07.94 UT: m1=11.2, Dia.=2′, DC=4/; 22-cm L (160x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Sep. 01.72 UT: m1=12.1, Dia.=0.9’, DC=5; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Post-outburst. Does not enhance in Swan Band filter, opaque centre, fuzzy semi-transparent outer coma. Low altitude = 19.1°. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Sep. 01.04 UT: m1=11.7, Dia.=0.6′, DC=7; 20-cm SCT (133x); Juan Jose Gonzalez (Alcuetas – Villabraz, Leon, Spain; Alt. 885 m, 42º 16′ N, 5º 27′ W) [After new outburst. Starlike central condensation : m2=12.5: (AQ). Brighter inner coma diameter : 0.6′, providing m=11.7 (AQ). Faint and diffuse outer coma was glimpsed, from a lower location than in my previous Aug. 25.00 UT observation. Sidgwick method. Field stars checked in DSS. Altitude: 26 deg. SQM: 21.0]
2017 Aug. 30.68 UT: m1=12.0, Dia.=0.4’, DC=7; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Post-outburst. Close to 12th magnitude star. Coma dims in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Aug. 25.00 UT: m1=12.5, Dia.=0.7′, DC=6; 20-cm SCT (133x); Juan Jose Gonzalez (Puerto del Pando – Prioro, Leon, Spain; Alt. 1430 m, 42º 56′ N, 4º 57′ W) [In outburst. Starlike central condensation : m2=13.7 (APASS). Brighter inner coma diameter : 0.7′, providing m=12.5 (APASS). Faint and diffuse outer coma diameter : 3′, providing m=10.5: (Tycho-2). ( This faint 3′ outer coma, remnant of previous outbursts, was also observed in pre-outburst dates : Aug. 16.91 and 20.92 UT ). Sidgwick method. Field stars checked in DSS. Altitude: 33 deg. SQM: 21.4]
2017 Aug. 23.45 UT: m1=13.9, Dia.=1.1’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Very diffuse. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Aug. 19.46 UT: m1=13.9, Dia.=0.8’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Aug. 14.45 UT: m1=13.9. Dia.=1.1’, DC=1; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, just above background threshold. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Aug. 01.73 UT: m1=13.4, Dia.=1’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 July 25.76 UT: m1=13.2, Dia.=1.2’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse with slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 July 24.74 UT: m1=13.6, Dia.=0.7’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Difficult, close to pairing of stars. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 July 05.77 UT: m1=13.3, Dia.=0.8’, DC=6; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Post outburst. Does not enhance in Swan Band filter. Stellar central condensation. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 July 02.06 UT: m1=12.2, Dia.=1.8′, DC=3/; 20-cm SCT (133x); Juan Jose Gonzalez (Alto del Castro – Aralla, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [In outburst. Starlike central condensation. The observed coma is the result of the recent previous minor outbursts. Comparison stars taken from APASS photometry. Field stars checked in DSS. Sidgwick method. SQM: 21.4]
2017 June 30.65 UT: m1=12.4, Dia.=1.7’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Post outburst. Coma weakly condensed and opaque at centre, diffuse outer coma. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 June 26.52 UT: m1=13.5, Dia.=0.8’, DC=1/2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, faint. Low altitude = 16.6°. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 June 22.75 UT: m1=13.5, Dia.=1’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Diffuse patch of light, slightly brighter in centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 May  29.75 UT: m1=13.3, Dia.=1.1’, DC=2; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 May  06.76 UT: m1=13.5, Dia.=1’, DC=2/3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slightly brighter and weakly condensed centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 May  04.76 UT: m1=12.5, Dia.=1.2′, DC=1; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)
2017 Apr. 28.74 UT: m1=13.6, Dia.=0.5’, DC=5/6; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Does not enhance in Swan Band filter. Coma appears circular and diffuse, opaque at the centre with a faint and sometimes stellar central condensation. Post outburst. Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ]
2017 Apr. 28.15 UT: m1=13.1, Dia.=0.4′, DC=7; 20-cm SCT (133x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [In outburst. Comparison stars taken from APASS photometry. Field stars checked in DSS. In-focus method. Tycho-2 comparison stars. Altitude: 11 deg. SQM : 21.4 at zenith. Mountain location, very clear sky]
2017 Apr. 05.75 UT: m1=[14.9; 25-cm L f:5 (166x); Chris Wyatt (Walcha, NSW, Australia) [Not visible; Limiting magnitude 14.9. Comparison stars checked using APASS data in Guide 9.0; Method= I; Cat= AQ]
2017 Mar. 27.74 UT: m1=[14.4, negative; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Limiting magnitude = 14.7. Comparison stars checked using APASS data in Guide 9.0; Method= I; Cat= AQ]
2016 Dec. 01.43 UT: m1=[14.3, negative; 25-cm L f:5 (166x); Chris Wyatt (Walcha, NSW, Australia) [Comet not visible; Stellar limiting magnitude = 14.3. Altitude = 17.8°]
2016 Nov. 22.42 UT: m1=[13.6, negative; 25-cm L f:5 (166x); Chris Wyatt (Walcha, NSW, Australia) [Not visible, stellar limiting magnitude=13.6]
2016 Nov. 16.77 UT: m1=12.5, Dia.=0.9′, DC=3; 20-cm SCT (133x); Juan José González (Gamoniteiro – Sierra del Aramo, alt. 1730 m, Asturias, España) [Estrellas de comparación de la fotometría APASS cercana al cometa. Estrellas de campo comprobadas en el DSS. Altura sobre el horizonte: 17º. Cielo muy claro de montaña]
2016 Nov. 04.40 UT: m1=12.3, Dia.=0.9′, DC=1; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)
2016 Nov. 02.48 UT; m1=13.0, Dia.=0.8’, DC=2/; 35-cm T f:11 (122x); Chris Wyatt (Armidale, NSW, Australia) [Coma diffuse, slight brightening to centre]
2016 Nov. 01.42 UT: m1=12.9, Dia.=0.5’, DC=2; 25-cm L f:5 (166x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre. Comet closely sandwiched between two stars of 13th magnitude]
2016 Oct. 31.72 UT: m1=12.4, Dia.=0.7′, DC=3; 60-cm L (305x); Sandor Szabo (Sopron, Hungary)
2016 Oct. 31.42 UT: m1=13.0, Dia.=0.6’, DC=2/; 25-cm L f:5 (166x); Chris Wyatt (Walcha, NSW, Australia) [Close to mag 7.8 star, 1.6’away in P.A. 024° approximately; Inner coma diffuse and opaque, fading to edges. Does not enhance in Swan Band filter]
2016 Oct. 26.80 UT: m1=12.7, Dia.=0.2′, DC=7; 20-cm SCT (133x); Juan José González (Pandorado, alt. 1190 m, León, España) [Outburst. Estrellas de comparación de la fotometría APASS cercana al cometa. Estrellas de campo comprobadas en el DSS. Altura sobre el horizonte: 19º. Cielo muy claro de montaña]
2016 Oct. 25.47 UT: m1=12.6, Dia.=0.2’, DC=6/; 25-cm L f:5 (166x); Chris Wyatt (Walcha, NSW, Australia) [Outburst; Observation made difficult due to glare from Mars in the field and a 10.4 magnitude star 0.8’ away in P.A. 167°; Coma shows star-like central condensation, with an opaque and whitish coloured outer coma. Coma does not enhance in Swan Band filter but central condensation is still visible with filter applied]
2016 Oct. 26.80 UT: m1=12.7, Dia.=0.2′, DC=7; 20-cm SCT (133x); Juan José González (Pandorado, alt. 1190 m, León, España) [Outburst. Estrellas de comparación de la fotometría APASS cercana al cometa. Estrellas de campo comprobadas en el DSS. Altura sobre el horizonte: 19º. Cielo muy claro de montaña]
2016 Oct 25.47 UT: m1=12.6, Dia.=0.2’, DC=6/; 25-cm L f:5 (166x); Chris Wyatt (Walcha, NSW, Australia) [Outburst; Observation made difficult due to glare from Mars in the field and a 10.4 magnitude star 0.8’ away in P.A. 167°; Coma shows star-like central condensation, with an opaque and whitish coloured outer coma. Coma does not enhance in Swan Band filter but central condensation is still visible with filter applied]
2016 Oct. 24.42 UT: m1=13.8, Dia.=0.4’; DC=5/; 25-cm L f:5 (166x); Chris Wyatt (Walcha, NSW, Australia) [Coma centre sometimes appears faintly stellar in good seeing. Close to mag 12.0 star, 0.8’away in P.A. 041°; Coma appears circular and slightly whitish in colour, outer coma opaque with a well condensed centre. No tail visible]
2016 Oct. 23.41 UT: m1=14.1, Dia.=0.3’, DC=8; 25-cm L f:5 (166x); Chris Wyatt (Walcha, NSW, Australia) [Coma shows star-like central condensation with a very small fuzzy outer coma (post-outburst). Does not enhance in Swan Band filter. No tail, m2 approximately 14.0]
2016 Oct. 19.42 UT: m1=[14.8; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Comet not visible; Limiting magnitude=14.8]
2016 Oct. 18.40 UT: m1=[14.5; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Comet not visible; Limiting magnitude=14.5]
2016 Oct. 04.43 UT: m1=[14.5, Negative; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Not visible, limiting magnitude 14.5]

24P/Schaumasse
2017 Nov. 16.21 UT: m1=9.7, Dia.=6′, DC=2/; 25×100 B; Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [Altitude: 29 deg. Zodiacal light. In 20 cm SCT (77x) : m1=9.9, Dia.=5′, DC=2/. Sidgwick method. Tycho-2 comparison stars. SQM: 20.9]
2017 Nov. 14.24 UT: m1=10.1, Dia.=5′, DC=2/; 20-cm SCT (100x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1490 m, 42º 54′ N, 5º 48′ W) [Altitude: 37 deg. Slight moonlight interference. Sidgwick method. Tycho-2 comparison stars. SQM: 20.6]
2017 Nov. 01.16 UT: m1=10.4:, Dia.=2.5′, DC=2-3; 0.15-m R f/5 (85x); Gabor Santa (Göd, Hungary) [not easy to see, but obvious, round, diffuse, with some condensation, very similar to 62P. 34 degs above horizon, nelm=4-4.5]
2017 Oct. 30.73 UT: m1=12.5, Dia.=1.8’, DC=3/4; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Low altitude = 10.4°; Twilight interference. Does not enhance in Swan Band filter. Diffuse coma, centre appears slightly brighter in periods of good seeing. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Oct. 26.80 UT: m1=12.8, Dia.=1.2′, DC=1; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)
2017 Oct. 23.20 UT: m1=10.6, Dia.=4′, DC=3; 20-cm SCT (100x); Juan Jose Gonzalez (Alto del Castro – Aralla, Leon, Spain; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Altitude: 33 deg. Zodiacal light. Sidgwick method. Tycho-2 comparison stars. SQM: 20.9]
2017 Oct. 03.15 UT: m1=10.9, Dia.=4′, DC=2/; 20-cm SCT (100x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54′ N, 5º 48′ W) [Obvious motion checked over a 15-min period. Field stars checked in DSS. Altitude: 24 deg. Zodiacal light. Sidgwick method. Tycho-2 comparison stars. SQM : 21.0]
2017 Sep. 25.76 UT: m1=[12.2; 40.0-cm L f/4.5 (257x); Seiichi Yoshida (Gunma, Japan)

22P/Kopff 
2015 Nov. 30.77 UT: m1=9.7, Dia.=3′, DC=1/; 20-cm SCT (77x); Juan José González (Alto del Trichero – Soto y Amío, alt. 1190 m, León, España) [Altura sobre el horizonte: 8º. Luz zodiacal. Cielo muy claro de montaña]
2015 Nov. 14.75 UT: m1=10.2, Dia.=3′, DC=2, no cola; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2015 Nov. 07.95 UT: m1=10.0, Dia.=3′, DC=2; 22-cm L (60X); Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Near a star with m1: 11.2]
2015 Nov. 07.77 UT: m1=9.2, Dia.=4′, DC=2/; 20-cm SCT (77x); Juan José González (Alto del Cellerón – Camposagrado, alt. 1190 m, León, España) [Altura sobre el horizonte: 10º. Crepúsculo astronómico. Cielo muy claro de montaña]
2015 Nov. 06.41 UT: m1=12.5, Dia.=2.2’, DC=1; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma enhances slightly in Swan Band filter. No tail, very diffuse and difficult due to zodiacal light interference and a slightly hazy background sky]
2015 Oct. 19.72 UT: m1= 9.8 DSLR, Dia.=3′, DC=2; Digital reflex+0.3m lens; Giuseppe Pappa (Sicily, Italy)
2015 Oct. 16.43 UT: m1=12.4, Dia.=1.3’, DC=2/; 25cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Observation difficult due to Moonlight, zodiacal light and low altitude = 16.8°. Coma diffuse with slightly more condensed centre visible in periods of good seeing. Slight cloud interference. Coma does not enhance in Swan Band filter]
2015 Oct. 16.38 UT: m1=12.4: CCD, Dia.=&1.7′; [T31] 0.50-m f/6.8 astrograph + CCD + focal reducer; A. Novichonok & T. Prystavski (iTelescope observatory, Q62 (remotely from Siding Spring, Australia)
2015 Oct. 14.94 UT: m1=9.5, Dia.=4′, DC=2; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2015 Oct. 14.80 UT: m1=9.0, Dia.=5′, DC=2; 20-cm SCT (77x); Juan José González (Alto del Castro, alt. 1720 m, León, España) [Altura sobre el horizonte: 10º. Crepúsculo astronómico. Cielo muy claro de montaña]
2015 Oct. 09.79 UT: m1=9.8, Dia.=3′, DC=2, no cola; 20-cm B (50x); Carlos Labordena (Castellón, España)
2015 Oct. 06.94 UT: m1=9.6, Dia.=4′, DC=3; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil) [ No enhancement with comet filter ]
2015 Oct. 02.38 UT: m1=12.5 CCD, Dia.=2.2′, Tail= 1.1′ in PA: 107 deg.; [T31] 0.50-m f/6.8 astrograph + CCD + focal reducer; A. Novichonok & T. Prystavski (iTelescope observatory, Q62 remotely from Siding Spring, Australia)
2015 Oct. 01.81 UT: m1=9.5, Dia.=4′, DC=2/; 20-cm SCT (77x); Juan José González (Alto del Castro, alt. 1720 m, León, España) [Altura sobre el horizonte: 9º. Fin del crepúsculo astronómico. Cielo muy claro de montaña]

19P/Borrelly 19P_Mag
2015 Nov. 12.15 UT: m1=13.6, Dia.=1.4′, DC=3; 60.3-cm L (244x); Sandor Szabo (Sopron, Hungary)
2015 Oct. 15.22 UT: m1=10.2, Dia.=4′, DC=2; 20-cm SCT (100x); Juan José González (Alto del Castro, alt. 1720 m, León, España) [Altura sobre el horizonte: 23º. Comienzo del crepúsculo astronómico. Luz zodiacal. Cielo muy claro de montaña]

10P/Tempel 10P_Mag
2016 Jan. 08.74 UT: m1=11.8 DSLR, Dia.=1′; 1100d+300mm lens; Giuseppe Pappa (Sicily, Italy)
2015 Dec. 29.73 UT: m1=11.0 DSLR, Dia.=1.5′; canon 1100d+300mm lens; Giuseppe Pappa (Mascalucia, Sicily, Italy)
2015 Dec. 19.10 UT: m1=10.0, Dia.=4′, DC=3; 56-cm (100x); Brad Young (Tulsa, OK, USA)
2015 Dec. 07.19 UT: m1=10.0 DSLR, Dia.=4′; digital reflex+0.3m lens; Giuseppe Pappa (Sicily, Italy)
2015 Dec. 06.07 UT: m1=9.7, Dia.=2, DC=3; 30×125 B; Carl Hergenrother (Tucson, AZ, USA)
2015 Nov. 30.79 UT: m1=9.2, Dia.=5′, DC=2; 20-cm SCT (77x); Juan José González ( Alto del Trichero – Soto y Amío, alt. 1190 m, León, España) [Estrella de magnitud 11.3 (APASS) en la coma. Altura sobre el horizonte: 9º. Luz zodiacal. Cielo muy claro de montaña]
2015 Nov. 15.73 UT: m1=11.6 DSLR, Dia.=1′, Digital reflex+0.3m lens; Giuseppe Pappa (Sicily, Italy)
2015 Nov. 15.72 UT: m1=11.5 DSLR, Dia.=2′, Digital reflex+0.3m lens; Giuseppe Pappa (Sicily, Italy)
2015 Nov. 14.76 UT: m1=9.8, Dia.=3′, DC=2, no cola; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2015 Nov. 09.72 UT: m1=11.4 DSLR, Dia.=1′; Digital reflex+0.3m lens; Giuseppe Pappa (Sicily, Italy)
2015 Nov. 07.96 UT: m1=11.1, Dia.=1.5′, DC=3; 22-cm L (160X); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2015 Nov. 07.78 UT: m1=9.5, Dia.=4′, DC=2; 20-cm SCT (77x); Juan José González (Alto del Cellerón – Camposagrado, alt. 1190 m, León, España) [Altura sobre el horizonte: 11º. Cielo muy claro de montaña]
2015 Nov. 06.96 UT: m1=11.2:, Dia.=1.5′, DC=3; 22-cm L (160X); Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Clouds]
2015 Nov. 06.40 UT: m1=11.7, Dia.=1.4’; DC=2/; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, semi-opaque, weakly condensed, pale blue in colour. Does not enhance in Swan Band filter. No tail]
2015 Oct. 31.08 UT: m1=[10.8, negative; 15-cm T (37.5x); Salvador Aguirre (Observatorio Real del Molinito, Hermosillo, Sonora, Mexico)
2015 Oct. 16.39 UT: m1=12.0: CCD Dia.=&2.4′; [T31] 0.50-m f/6.8 astrograph + CCD + focal reducer; A. Novichonok & T. Prystavski (iTelescope observatory, Q62 remotely from Siding Spring, Australia)
2015 Oct. 14.81 UT: m1=9.5, Dia.=4′, DC=2/; 20-cm SCT (77x); Juan José González (Alto del Castro, alt. 1720 m, León, España) [Altura sobre el horizonte: 11º. Cielo muy claro de montaña]
2015 Oct. 09.42 UT: m1=11.1, Dia.=3.5’, DC=2; 25cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Close to mag 11 and 12 stars; enhances slightly in Swan Band filter, no tail. Coma very diffuse and transparent]
2015 Oct. 08.40 UT: m1=11.3, Dia.=2.8′, DC=2/; 30cm Dobson; Con Stoitsis (Caulfield, Australia) [Coma very diffused and uniformed. Easier with averted vision]
2015 Oct. 06.95 UT: m1=10.6, Dia.=2′, DC=4; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil) [No enhancement with comet filter]
2015 Oct. 05.41 UT: m1=11.0, Dia.=4.8’, DC=2; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Sky hazy, slight Zodiacal light interference. Coma very diffuse with very weakly condensed centre, no tail. Enhances slightly in Swan Band filter]
2015 Oct. 03.42 UT: m1=11.1, Dia.=3.4’, DC=2; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Very diffuse coma, enhances slightly in Swan Band filter, no tail; Zodiacal light interference]
2015 Oct. 03.38 UT: m1=12.2 CCD Dia.=2.7′; [T31] 0.50-m f/6.8 astrograph + CCD + focal reducer; A. Novichonok & T. Prystavski (iTelescope observatory, Q62 remotely from Siding Spring, Australia)

9P/Tempel 9P_Mag
2016 Ago. 05.88 UT: m1=10.3, Dia.=3′, DC=2, no cola; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2016 Ago. 01.89 UT: m1=9.9, Dia.=6′, DC=3; 20-cm SCT (77x); Juan José González (Cueto Rosales, alt. 1420 m, León, España) [Crepúsculo astronómico]
2016 July 31.97 UT: m1=10.3, Dia.=3′, DC=2/; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 July 31.39 UT: m1=11.9, Dia.=2.8’, DC=2/; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Very diffuse, slight brightening to centre; No tail]
2016 July 29.89 UT: m1=10.1, Dia.=3′, DC=2, no cola; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2016 July 28.38 UT: m1=12.0, Dia.=3.1’, DC=3/; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse, brightens to centre but weakly condensed. No tail, slight zodiacal light interference]
2016 July 27.90 UT: m1=9.8, Dia.=5′, DC=2/; 20-cm SCT (77x); Juan José González (Alto del Castro, alt. 1720 m, León, España) [Fin del crepúsculo astronómico]
2016 July 25.38 UT: m1=12.2, Dia.=2.6’, DC=2/; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, close to mag 8.7 star 3.4’away in P.A. 056°. No tail, does not enhance]
2016 July 08.92 UT: m1=10.8, Dia.=3′, DC=2; 20-cm SCT (77x); Juan José González (Cueto Rosales, alt. 1420 m, León, España)
2016 July 03.92 UT: m1=11.5, Dia.=2.5′, DC=3/; 22-cm L (60x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 July 02.92 UT: m1=10.8, Dia.=3.5′, DC=2/; 20-cm SCT (77x); Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España)
2016 July 02.39 UT: m1=12.5, Dia.=3’, DC=3/; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, semi-transparent edges with slight brightening to a moderately condensed and opaque centre. Does not enhance in Swan Band filter]
2016 July 01.90 UT: m1=11.2, Dia.=2′, DC=3, no cola; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2016 June 28.48 UT: m1=12.3, Dia.=2.3’, DC=3; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [No tail; Diffuse coma slightly brightening to a weakly condensed centre. Does not enhance in Swan Band filter]
2016 Jun. 27.93 UT: m1=10.9, Dia.=3′, DC=3; 20-cm SCT (77x); Juan José González (Alto del Castro – Aralla, alt. 1720 m, León, España)
2016 June 09.80 UT: m1=13.7 CCD, Dia.=0.6′, DC=3; 20-cm L+CCD; Danil Sidorko (Korenovsk, Russia)
2016 June 09.02 UT: m1=11.6, Dia.=2.5′, DC=3; 22-cm L (160x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 June 08.04 UT: m1=11.7, Dia.=2′, DC=2/; 22-cm L (160x); Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2016 June 07.92 UT: m1=11.4, Dia.=2.0′, DC=3; 31-cm C f/9 (68x); Martin Lehky ((Hradec Kralove, Czech Republic)
2016 June 06.92 UT: m1=11.4, Dia.=2.0′, DC=3; 31-cm C f/9 (68x); Martin Lehky ((Hradec Kralove, Czech Republic)
2016 June 04.91 UT: m1=11.7, Dia.=2′, DC=3, no cola; 20-cm SCT (80x); Carlos Labordena (Castellón, España)
2016 June 03.49 UT: m1=13.0, Dia.=0.9′, DC=4; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Gunma, Japan)

2P/Encke 2p_mag
2017 Apr. 28.76 UT: m1=12.3, Dia.=1.4’, DC=3; 25-cm L f:5 (83x); Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, does not enhance in Swan Band filter. Interference by Zodiacal light. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
2017 Apr. 05.76 UT: m1=9.8, Dia.=4.3’, DC=5/6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Apr. 01.87 UT: m1=9.6, Dia.=4.5′, DC=3; 10-cm f/4 L (20x); Andrew Pearce (Bailup, W. Australia)
2017 Mar. 31.87 UT: m1=9.6, Dia.=3.5′, DC=3/; 20-cm f/4 L (45x); Andrew Pearce (Bailup, W. Australia)
2017 Mar. 30.36 UT: m1=8.9:, Dia.=2′, DC=3; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Civil twilght / sun altitude: -11º]
2017 Mar. 27.76 UT: m1=9.1, Dia=1.6’, DC=5/6; 25-cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Enhances well in Swan Band filter; Coma small with opaque centre, aqua-blue in colour. Slight zodiacal light interference; Low altitude = 10.1°. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Mar. 26.35 UT: m1=7.7, Dia.=2′, DC=6; 9.0-cm R f/5.5 (33x); Willian Souza (Sao Paulo, Brazil)
2017 Mar. 25.79 UT: m1=8.0, Dia.=2’, DC=7; 25×100 B; Michael Mattiazzo (Swan Hill, Vic, Australia) [low altitude, moonlight]
2017 Mar. 25.35 UT: m1=7.4, Dia.=3′, DC=3; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Nautical twilight; Sun altitude: -13 º and Comet altitude: 16º]
2017 Mar. 24.87 UT: m1=7.9, Dia.=4′, DC=6; 10-cm f/4 L (20x); Andrew Pearce (Bailup, W. Australia)
2017 Mar. 24.35 UT: m1=7.2, Dia.= 3′, DC= 3; 20×100 B; Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Nautical twilight; Sun altitude: -13 º and Comet altitude: 14º]
2017 Feb. 24.83 UT: m1=8.4, Dia.=2.0′, DC=7; 10×50 B; Juan Jose Gonzalez (Villasecino, Leon, Spain; Alt. 1220 m, 42º 58′ N, 6º 01′ W) [Morris method. Tycho-2 comparison stars. SQM : 21.3 at zenith. Altitude: 8 deg. Zodiacal light. Mountain location, very clear sky. In 25x100B: m1=8.8]
2017 Feb. 22.83 UT: m1=8.4, Dia.=2.0′, DC=7; 10×50 B; Juan Jose Gonzalez (Alto de la Colladona, Asturias, Spain; Alt.910 m, 43º 11′ N, 5º 37′ W) [Morris method. Tycho-2 comparison stars. SQM : 21.1 at zenith. Altitude: 11 deg. Zodiacal light. Mountain location, very clear sky. In 25x100B : m1=8.7]
2017 Feb. 19.77 UT: m1=8.9, Dia.=2.2′, DC=6; 20×80 B; Marek Biely (Brno, Czech Republic, 244 m.a.s.l.) [Low altitude: 10.9 deg. above the horizon. Correction for an atmospheric extinction not needed]
2017 Feb. 17.79 UT: m1=9.6, Dia.=3′, DC=5, no tail; 20-cm SCT (50x); Carlos Labordena (Castellón, España)
2017 Feb. 17.67 UT: m1=9.0, Dia.=3′, DC=3/; 25-cm (48x); Danil Sidorko (Korenovsk, Russia) [easy comet to view]
2017 Feb. 16.82 UT: m1=9.2, Dia.=3′, DC=5; 25×100 B; Juan Jose Gonzalez (Alto de la Camperona, Leon, Spain; Alt. 1600 m, 42º 51′ N, 5º 12′ W) [Morris method. Tycho-2 comparison stars. SQM : 21.4 at zenith. Altitude: 16 deg. Mountain location, very clear sky]
2017 Feb. 16.75 UT: m1=8.8, Dia.=4.8′, DC=3; 20×100 B; Martin Lehky (Czech Republic)
2017 Feb. 16.67 UT: m1=8.8, Dia.=3.5′, DC=3/; 25-cm (48x); Danil Sidorko (Korenovsk, Russia) [easy comet to view]
2017 Feb. 15.77 UT: m1=9.7, Día.=2.5′, DC=1; 35.6-cm T f:11 (78x); Alex Scholten (Bussloo, Netherlands)
2017 Feb. 15.76 UT: m1=9.2, Dia.=3′, DC=4; 15.2-cm R f:5 (38x); Maik Meyer (Limburg, Germany)
2017 Feb. 15.75 UT: m1=9.5, Dia.=2.3′, DC=4; 20×80 B; Marek Biely (Brno, Czech Republic, 244 m.a.s.l.) [Low altitude: 17.4 deg. above the horizon. Correction for an atmospheric extinction not needed]
2017 Feb. 15.75 UT: m1=9.3, Dia.=2.5′, DC=5; 33-cm L (67x); Piotr Guzik (Koskowa Góra, Poland, Alt. 800 m, 49° 45′ N, 19º 47′ E) [Morris method used. Bright, moderately condensed, slightly assymetric coma. Deep in bright zodiacal light. Excellent transparency. Relatively easy to see in 10×50 binoculars: m1=9.0, Dia.=&4′, DC=4. SQM: 20.8 at zenith]
2017 Feb. 15.74 UT: m1=9.0, Dia.=5′, DC=3/; 20×100 B; Martin Lehky (Czech Republic)
2017 Feb. 15.71 UT: m1=9.0, Dia=3′, DC=4; 23.5-cm T (115x); Alexsandr Morozov (Novozybkov, Russia)
2017 Feb. 14.75 UT: m1=9.5, Dia.=2.5′, DC=5; 33-cm L (67x); Piotr Guzik (Koskowa Góra, Poland, Alt. 800 m, 49° 45′ N, 19º 47′ E) [Morris method used. Bright, moderately condensed, slightly assymetric coma. Deep in bright zodiacal light. I could also barely glimpse it in 10×50 binoculars. SQM: 20.7 at zenith]
2017 Feb. 14.74 UT: m1=9.2, Dia.=5′, DC=3/; 20×100 B; Martin Lehky (Czech Republic)
2017 Feb. 14.73 UT: m1=8.8, Dia.=2′, DC=2; 15.3-cm R (83x); Gabor Santa (Göd, county Pest, Hungary) [Nelm: 3-4, 21 deg above horizon]
2017 Feb. 13.75 UT: m1=10.0, Dia.=2.5′, DC=6; 32.0-cm L f:5 (80x); Uwe Pilz (Leipzig, Germany)
2017 Feb. 13.74 UT: m1=9.2, Dia.=5′, DC=3/; 20×100 B; Martin Lehky (Czech Republic)
2017 Jan. 24.39 UT: m1=12.2, Dia.=1.7′, DC=1/; 40.0-cm L f/4.5 (144x); Seiichi Yoshida (Ibaraki, Japan)
2017 Jan. 23.75 UT: m1=11.3, Dia.=3′, DC=2; 33-cm L (67x); Piotr Guzik (Koskowa Góra, Poland; Alt. 800 m, 49º 45′ N, 19º 47′ E) [Sidgwick method used. Large and diffuse but relatively easy to see. Zodiacal light interference. SQM: 20.8 at zenith]
2017 Jan. 19.79 UT: m1=11.1, Dia.=4′, DC=1/; 20-cm SCT (77x); Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1470 m, 42º 54′ N, 5º 48′ W) [Sidgwick method. APASS comparison stars. SQM: 21.3 at zenith. Zodiacal light. Mountain location, very clear sky]
2017 Jan. 01.78 UT: m1=12.8, Dia.=3′, DC=1; 30.5-cm L f/4,9 (97x); J. P. Navarro Pina (Campos del Rio, Murcia, Spain) [Sidgwick method, Tycho-2 stellar catalogue]
2017 Jan. 01.72 UT: m1=12.7, Dia.=3.5′; 32-cm reflector; Uwe Pilz (Leipzig, Germany)
2016 Dec. 31.72 UT: m1=11.7, Dia.=4.0′, DC=1; 35-cm L (62x); Jakub Cerny (Senohraby, Czech Republic)
2016 Dec. 22.74 UT: m1=~13.5, Dia.=~2′, DC=1; 33-cm L (67x); Piotr Guzik (Koskowa Góra, Poland; Alt. 800 m, 49º 45′ N, 19º 47′ E) [Sidgwick method used. Visible as relatively large (possibly even a bit larger than the reported 2′ in diameter), very diffuse patch of light, next to small, 13 mag galaxy NGC 7242. SQM: 21.0 at zenith]
2016 Dec. 26.82 UT: m1=11.5, Dia.=4′, DC=1/; 20-cm SCT (100x); Juan José González (Alto del Castro, alt. 1720 m, León, España; Alt. 1720 m, 42º 54′ N, 5º 48′ W) [Método Sidgwick. Estrellas de comparación APASS. SQM zenital: 21.2. Cielo muy claro de montaña]
2016 Dec. 22.74 UT: m1=~13.5, Dia.=~2′, DC=1; 33-cm L (67x); Piotr Guzik (Koskowa Góra, Poland; Alt. 800 m, 49º 45′ N, 19º 47′ E) [Sidgwick method used. Visible as relatively large (possibly even a bit larger than the reported 2′ in diameter), very diffuse patch of light, next to small, 13 mag galaxy NGC 7242. SQM: 21.0 at zenith]
2016 Sep. 06.99 UT: m1=18.7 CCD, Dia.=0.18′, DC=8/; 0.25-m L f/4.7 + CCD; Sergey Shurpakov (C36, Baran’, Belarus)

 

linea-separador2

Dto. Publicaciones SECCION COMETAS LIADA
“Semper Observandum”
cometas.liada [AT] gmail.com / rastreadoresdecometas [AT] gmail.com

Nota: [magnitud es una observación negativa de modo que el cometa se encuentra debajo de ese brillo con ese instrumento utilizado. >magnitud es usado cuando el cometa fue visto y el observador simplemente dice que era más débil que la magnitud dada.  magnitud: los dos puntos “:” indican quela magnitud no es muy exacta o hecha en pobres condiciones.  & Diámetros de coma y longitudes de cola aproximados.

Compilado de Observaciones en formato LIADA (Morris modificado)

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