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RECIENTES OBSERVACIONES VISUALES & CCD / RECENT COMET OBSERVATIONS
(actualizada al 27 de Mayo de 2020 / Update 2020, May 27 – comet.observations [AT] gmail.com – cometas.liada [AT] gmail.com)

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Coordinación: Vacante / Administration: Vacant


C/2020 H2 (Pruyne)
2020 Apr. 28.78 UT: m1=13.3, Dia.=0.7’, DC=3, … 25-cm L f:5(125x) … Chris Wyat (Walcha, NSW, Australia) [Coma very diffuse and difficult, previously designated PCCP C166T11. Altitude= 21.6°. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]

P/2020 G1 (Pimentel)
2020 Apr. 24.40 UT: m1=15.6, Dia.=0.2’, DC=3, … 40-cm L f:4(261x) … Chris Wyatt (Walcha, NSW, Australia) [Difficult. very small and diffuse, visible in periods of good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2020 Apr. 19.40 UT: m1=15.0, Dia.=0.4’, DC=2/, … 40-cm L(261x) … Chris Wyatt (Walcha, NSW, Australia) [Very diffuse, visible in periods of good seeing. Altitude= 23.4°. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]

C/2020 F8 (SWAN)
2020 May  26.12 UT: m1=6.8, Dia.=4′, DC=3, Tail=0.2 deg. in PA: 350 deg., … 20-cm SCT(77x) … Juan Jose Gonzalez (Renorios – Bello – Aller, Asturias, Spain, 43º 08′ N, 5º 38′ W, alt. 1200 m) [Beginning of astronomical twilight. Mountain location, very clear sky. Altitude: 7 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 20.1]
2020 May  20.95 UT: m1=7.1, Dia.=8′, DC=3, … 11.4-cm L(40x) … Alexsandr Morozov (Novozybkov, Russia)
2020 May  18.13 UT: m1=5.7, Dia.=6′, DC=5/, Tail=0.2 deg. in PA: 270 deg., … 25×100 B … Juan Jose Gonzalez (Puerto de la Cubilla, Asturias, Spain, 42º 59′ N, 5º 54′ W, alt. 1680 m) [Mountain location, very clear sky. Altitude: 6°. Sidgwick method. Tycho-2 comparison stars. SQM: 20.4]
2020 May  18.13 UT: m1=5.8, Dia.=5′, DC=5, … 20-cm SCT(77x) … Juan Jose Gonzalez (Puerto de la Cubilla, Asturias, Spain, 42º 59′ N, 5º 54′ W, alt. 1680 m)
2020 May  12.36 UT: m1=5.8, Dia.=8′, DC=6, … 7×50 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil) [moonlight, comet altitude: 13°, atmospheric extinction applied]
2020 May  12.36 UT: m1=5.8, Dia.=8′, DC=6, … 15-cm L(42x) … Willian Souza (Sao Paulo-SP, Brazil)
2020 May  12.35 UT: m1=5.7, Dia.=8′, DC=6, … 15×70 B … Willian Souza (Sao Paulo, Brazil)
2020 May  11.36 UT: m1=5.7, Dia.=7′, DC=7, … 7×50 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Moonlight, nautical twilight, comet and comparison stars: 15° altitude]
2020 May  11.36 UT: m1=5.8, Dia.=8′, DC=6, … 15-cm L(42x) … Willian Souza (Sao Paulo-SP, Brazil)
2020 May  11.35 UT: m1=5.8, Dia.=8′, DC=6, … 15×70 B … Willian Souza( Sao Paulo, Brazil)
2020 May  11.35 UT: m1=5.9, Dia.=7′, DC=6, … 11×80 B … José Guilherme de S. Aguiar (Campinas/SP, Brazil)
2020 May  10.36 UT: m1=5.8, Dia.=8′, DC=6, … 15×70 B … Willian Souza (Sao Paulo, Brazil)
2020 May  10.35 UT: m1=5.8, Dia.=8′, DC=6, … 10×50 B … Willian Souza (Sao Paulo, Brazil)
2020 May  09.40 UT: m1=5.9, Dia.=2′, DC=2, Tail=<5 arcmin. in PA:250 deg., … 20×80 B … Germán Morales (Cochabamba, Bolivia)
2020 May  09.35 UT: m1=5.6, Dia=6′, DC=5/, … 11×80 B … José Guilherme de S. Aguiar (Campinas/SP, Brazil)
2020 May  09.35 UT: m1=5.6, Dia.=8′, DC=6, … 7×50 B … Willian Souza (Sao Paulo, Brazil)
2020 May  09.35 UT: m1=5.7, Dia.=8′, DC=6, … 7×50 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Moonlight]
2020 May  09.34 UT: m1=5.7, Dia.=8′, DC=6, … 15×70 B … Willian Souza (Sao Paulo, Brazil)
2020 May  08.40 UT: m1=5.8, Dia.=2′, DC=2, Tail=<5 arcmin. in PA:250 deg., … 20×80 B … Germán Morales (Cochabamba, Bolivia)
2020 May  08.36 UT: m1=5.5, Dia.=6′, DC=6, … 11×80 B … José Guilherme de S. Aguiar (Campinas/SP, Brazil)
2020 May  08.35 UT: m1=5.5, Dia.=8′, DC=6, … 7×50 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Moonlight]
2020 May  07.37 UT: m1=5.5, Dia.=12’, DC=4, … 10X50 B … Alberto Anunziato (Paraná, Argentina) [Mét. Sidgwick, Cat. Tycho II. I can’t see the tail]
2020 May  06.79 UT: m1=5.5, Dia.=5’, DC=6, … 10×50 R … Chris Wyatt (Walcha, NSW, Australia) [Moonlight, 99% illuminated, 6.2° above Western horizon. Faint tail traceable to 40’ in length in P.A. 235° approximately. Coma diffuse and opaque with a faint stellar pseudo-nucleus. Localised fog conditions but clear in vicinity of comet. Comet altitude= 23.4°. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 May  05.35 UT: m1=5.1, Dia.=10′, DC=6, Tail=60 arcmin. in PA: 240°, … 7×50 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Mist, comet is decreasing its brightness]
2020 May  05.35 UT: m1=5.2, Dia.=10′, DC=6, … 8×42 B … Willian Souza (Sao Paulo, Brazil)
2020 May  05.35 UT: m1=5.3, Dia.=8′, DC=5/, … 11×80 B … José Guilherme de S. Aguiar (Campinas/SP, Brazil)
2020 May  05.34 UT: m1=5.3, Dia.=10′, DC=6, … 15×70 B … Willian Souza (Sao Paulo, Brazil)
2020 May  04.79 UT: m1=5.7, Dia.=8.5’, DC=5/, … 10×50 R … Chris Wyatt (Walcha, NSW, Australia) [Faint tail traceable to 1° in length in P.A. 233° approximately using averted vision. Diffuse and opaque inner coma, pale aqua-blue colour. Faint stellar pseudo-nucleus visible. Next to Iota Ceti, 18’ away, Altitude= 25.0°. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 May  04.77 UT: m1=5.3, Dia.=8′, DC=5, Tail=1.5 degrees in PA=225 degrees, … 25×100 B … David A. J. Seargent (Cowra, NSW, Australia)
2020 May  04.36 UT: m1=5.0, Dia.=10′, DC=6/, … 7×50 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Nautical twilight]
2020 May  04.35 UT: m1=5.0, Dia.=10′, DC=7, … 8×42 B … Willian Souza (Sao Paulo, Brazil)
2020 May  04.35 UT: m1=5.1, Dia.=8′, DC=5, … 11×80 B … José Guilherme de S. Aguiar (Campinas/SP, Brazil)
2020 May  04.34 UT: m1=5.1, Dia.=10′, DC=7, … 15×70 B … Willian Souza (Sao Paulo, Brazil)
2020 May  04.34 UT: m1=5.1, Dia.=10′, DC=6, … 15-cm L(29x) … Willian Souza (Sao Paulo, Brazil)
2020 May  03.75 UT: m1=5.6, Dia.=9’, DC=7, … 10×50 R … Chris Wyatt (Walcha, NSW, Australia) [Faint tail visible, traced to 1.8° in length in P.A. 230° approximately using averted vision. Coma opaque and aqua-blue in colour with faint thin transparent outer edge. Altitude= 17.2°. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 May  03.35 UT: m1=5.0, Dia.=8′, DC=6, … 11×80 B … José Guilherme de S. Aguiar (Campinas/SP, Brazil)
2020 May  03.34 UT: m1=4.8, DC=8, … Naked eye … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 May  03.33 UT: m1=4.9, Dia.=10′, DC=6/, Tail=40 arcmin. in PA: 240°, … 7×50 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 May  02.33 UT: m1=5.1, Dia.=10′, DC=7, … 15×70 B … Willian Souza (Sao Paulo, Brazil)
2020 May  02.35 UT: m1=4.7, DC=8, … Naked eye … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 May  02.35 UT: m1=5.0, Dia.=8′, DC=5, … 11×80 B … Jose Guilherme Aguiar (Campinas/SP, Brazil)
2020 May  02.34 UT: m1=4.8, Dia.=10′, DC=6/, Tail=40 arcmin. in PA: 230°, … 7×50 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 May  01.40 UT: m1=5.5, Dia.=2′, DC=2, Tail=<3 arcmin. in PA:240 deg., … 20×80 B … Germán Morales (Cochabamba, Bolivia)
2020 May  01.37 UT: m1=5.5, … 9.0-cm T(24x) … Igor Grageda Mendez (Cochabamba, Bolivia)
2020 May  01.37 UT: m1=5.5, … 15×70 B … Igor Grageda Mendez (Cochabamba, Bolivia)
2020 May  01.35 UT: m1=4.8, DC=8, … Naked eye … Marco Antonio Coelho Goiato (Araçatuba, Brazil) …
2020 May  01.35 UT: m=5.1, Dia.=10′, DC=6, … 8×42 B … Willian Souza (Sao Paulo, Brazil)
2020 May  01.34 UT: m1=4.9, Dia.=10′, DC=6/, Tail=40 arcmin. in PA: 230°, … 7×50 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 May  01.34 UT: m1=5.1, Dia.=8′, DC=6, … 11×80 B … Jose Guilherme Aguiar (Campinas/SP, Brazil)
2020 May  01.34 UT: m=5.2, Dia.=10′, DC=7, … 10×50 B … Willian Souza (Sao Paulo, Brazil)
2020 May  01.32 UT: m=5.2, Dia.=10′, DC=7, … 15×70 B … Willian Souza (Sao Paulo, Brazil)
2020 May  01.31 UT: m=5.2, Dia.=10′, DC=6, … 15-cm L(32x) … Willian Souza (Sao Paulo, Brazil)
2020 Apr. 30.40 UT: m1=5.7, Dia.=1′, DC=1, Tail=<3 arcmin. in PA:240 deg., … 20×80 B … Germán Morales (Cochabamba, Bolivia)
2020 Apr. 30.37 UT: m1=5.7, … 9.0-cm T(100x) … Igor Grageda Mendez (Cochabamba, Bolivia)
2020 Apr. 30.37 UT: m1=5.7, … 9.0-cm T(24x) … Igor Grageda Mendez (Cochabamba, Bolivia)
2020 Apr. 30.37 UT: m1=5.7, … 15×70 B … Igor Grageda Mendez (Cochabamba, Bolivia)
2020 Apr. 30.35 UT: m1=5.2, Dia.=8′, DC=5/, … 11×80 B … Jose Guilherme Aguiar (Campinas/SP, Brazil)
2020 Apr. 30.32 UT: m1=5.2, Dia.=10′, DC=7, … 15×70 B … Willian Souza (Sao Paulo, Brazil)
2020 Apr. 30.35 UT: m1=5.1, Dia.=10′, DC=7, … 10×50 B … Willian Souza (Sao Paulo, Brazil)
2020 Apr. 29.75 UT: m1=5.4, Dia.=8.5’, DC=6, … 10×50 R … Chris Wyatt (Walcha, NSW, Australia) [Faint tail visible, traced to 45’ in length in P.A. 223° approximately. Coma centre opaque, stellar pseudo-nucleus, thin transparent outer coma edge. Visible naked eye, estimated magnitude 5.2. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 Apr. 29.35 UT: m1=5.3, Dia.=8′, DC=6, … 11×80 B … Jose Guilherme Aguiar (Campinas/SP, Brazil)
2020 Apr. 29.35 UT: m1=5.4, Dia.=6′, DC=5, … 25×100 B … Jose Guilherme Aguiar (Campinas/SP, Brazil)
2020 Apr. 29.35 UT: m1=5.2, Dia.=10′, DC=7, … 8×42 B … Willian Souza (Sao Paulo, Brazil)
2020 Apr. 29.35 UT: m1=5.3, Dia.=10′, DC=7, … 10×50 B … Willian Souza (Sao Paulo, Brazil)
2020 Apr. 29.34 UT: m1=5.3, Dia.=10′, DC=7, … 15×70 B … Willian Souza (Sao Paulo, Brazil)
2020 Apr. 29.33 UT: m1=5.3, Dia.=10′, DC=6, … 15-cm L(42x) … Willian Souza (Sao Paulo-SP, Brazil)
2020 Apr. 29.31 UT: m1=5.6, Dia.=9′, DC=6, … 7×50 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 Apr. 28.76 UT: m1=5.6, Dia.=7’, DC=5/, … 10×50 R … Chris Wyatt (Walcha, NSW, Australia) [Pale aqua-blue coma, centre opaque, hazy edges with faint tail visible, traced to 35’ in length in P.A. 223° approximately. Through the 10” f/5 dob at x40 I can trace the faint and narrow tail for 1.2° in P.A. 226°. Faintly detectable with naked eye using averted vision. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 Apr. 28.40 UT: m1=6.3, Dia.=1′, DC=1, Tail=<1 arcmin. in PA:240 deg., … 20×80 B … Germán Morales (Cochabamba, Bolivia)
2020 Apr. 28.35 UT: m1=6.0, Dia.=10’, DC=5/, … 25-cm L(52X) … Gonzalo Vargas (Cochabamba Bolivia) [Some elongate coma or deformation around 220°aprox.]
2020 Apr. 28.35 UT: m1=6.1, Dia.=6′, DC=5, … 11×80 B … Jose Guilherme Aguiar (Campinas/SP, Brazil)
2020 Apr. 28.31 UT: m1=5.9, Dia.=9′, DC=6, … 7×50 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 Apr. 27.40 UT: m1=6.5, Dia.=1′, DC=1, … 20×80 B … Germán Morales (Cochabamba, Bolivia)
2020 Apr. 27.35 UT: m1=6.3, Dia.=8′, DC=5, … 7×50 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 Apr. 27.35 UT: m1=6.4, Dia=6′, DC=4, … 11×80 B … Jose Guilherme Aguiar (Campinas/SP, Brazil)
2020 Apr. 26.35 UT: m1=6.6, Dia.=8′, DC=5, … 7×50 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 Apr. 26.35 UT: m1=6.9, Dia.=6′, DC=5, … 15-cm L(42x) … Willian Souza (Sao Paulo-SP, Brazil)
2020 Apr. 26.34 UT: m1=6.7, Dia.=7′, DC=6/, … 20×100 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 Apr. 26.34 UT: m1=6.9, Dia.=6′, DC=5, … 10×50 B … Willian Souza ( Sao Paulo, Brazil)
2020 Apr. 26.32 UT: m1=6.9, Dia.=6′, DC=5, … 15×70 B … Willian Souza ( Sao Paulo, Brazil)
2020 Apr. 26.31 UT: m1=6.9, Dia.=6′, DC=5, … 15-cm L(42x) … Willian Souza (Sao Paulo-SP, Brazil)
2020 Apr. 25.75 UT: m1=7.2, Dia.=10’, DC=5, … 10×50 R … Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse with transparent outer edge, inner coma opaque and almost appears stellar. No tail visible. Through my 10” dob at x40 there is a faint narrow extension from the inner coma to the NNW approximately about 1.5’ in length from the centre, P.A. 353° approx. A faint tail is traced for 22’ in length in P.A. 220° approximately. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 Apr. 25.40 UT: m1=7.2, Dia.=1′, DC=1, … 20×80 B … Germán Morales (Cochabamba, Bolivia)
2020 Apr. 25.35 UT: m1=7.0, Dia.=5′, DC=5, … 15×70 B … Willian Souza( Sao Paulo, Brazil)
2020 Apr. 25.33 UT: m1=6.8, Dia.=5′, DC=4/, … 11×80 B … Jose Guilherme Aguiar (Campinas/SP, Brazil)
2020 Apr. 25.31 UT: m1=7.0, Dia.=6′, DC=5, … 15-cm L(42x) … Willian Souza (Sao Paulo-SP, Brazil)
2020 Apr. 24.75 UT: m1=7.3, Dia.=9’, DC=5, … 10×50 R … Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse and opaque, almost stellar at centre. Through the 10” f/5 reflector at x40 there is a faint tail traceable to 21’ in length in P.A. 219° approximately, and about 4’ wide at its extremity. No obvious tail sighted using 10×50 monocular used for m1 measurement. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 Apr. 24.36 UT: m1=7.0, Dia.=5′, DC=4, … 25×100 B … Jose Guilherme Aguiar (Campinas/SP, Brazil)
2020 Apr. 24.33 UT: m1=7.1, Dia.=5′, DC=5, … 11×80 B … Jose Guilherme Aguiar (Campinas/SP, Brazil)
2020 Apr. 23.36 UT: m1=7.1, Dia.=4′, DC=4, … 25×100 B … Jose Guilherme Aguiar (Campinas/SP, Brazil)
2020 Apr. 23.34 UT: m1=7.4, Dia.=6′, DC=5, … 20×100 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 Apr. 23.33 UT: m1=7.2, Dia.=5′, DC=5, … 11×80 B … Jose Guilherme Aguiar (Campinas/SP, Brazil)
2020 Apr. 22.76 UT: m1=7.7, Dia.=10’, DC=5, … 7×50 B … Chris Wyatt (Walcha, NSW, Australia) [Well condensed and opaque centre, fading gradually to edges, no tail visible. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 Apr. 22.76 UT: m1=7.7, Dia.=5.5’, DC=5/, … 25-cm L f:5(40x) … Chris Wyatt (Walcha, NSW, Australia) [Faint tail visible, traced to 14.5’ in length in P.A. 216° approximately. Pale-aqua blue in colour, opaque centre gradually fading to edges. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2020 Apr. 22.33 UT: m1=7.3, Dia.=5′, DC=4/, … 11×80 B … Jose Guilherme Aguiar (Campinas/SP, Brazil)
2020 Apr. 21.79 UT: m1=7.6, Dia.=9’, DC=5, … 5-cm R(10x) … Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse and opaque with semi-transparent edge. Well condensed centre. No tail visible. Observed using 10×50 monocular. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 Apr. 21.72 UT: m1=7.6, Dia.=5, … 25×100 B … David A. J. Seargent (Cowra, NSW, Australia) [Enhanced through Swan Band filter]
2020 Apr. 21.35 UT: m1=7.2, Dia.=5′, DC=4, … 10×50 B … Willian Souza (Sao Paulo, Brazil)
2020 Apr. 21.35 UT: m1=7.2, Dia.=5′, DC=4, … 10×50 B … Willian Souza (Sao Paulo, Brazil)
2020 Apr. 21.34 UT: m1=7.3, Dia.=5′, DC=4, … 15×70 B … Willian Souza (Sao Paulo, Brazil)
2020 Apr. 21.33 UT, m1=7.3, Dia.=5′, DC=5, … 11×80 B … Jose Guilherme Aguiar (Campinas/SP, Brazil)
2020 Apr. 21.32 UT: m1=7.3, Dia.=5′, DC=5, … 15-cm L(42x) … Willian Souza (Sao Paulo-SP, Brazil)
2020 Apr. 21.30 UT: m1=7.3, Dia.=5′, DC=5, … 15-cm L(33x) … Willian Souza (Sao Paulo-SP, Brazil)
2020 Apr. 20.35 UT: m1=7.3, Dia.=5′, DC=4, … 15×70 B … Willian Souza( Sao Paulo, Brazil)
2020 Apr. 20.35 UT: m1=7.4, Dia.=7′, DC=4, … 7×50 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 Apr. 20.34 UT: m1=7.5, Dia.=6′, DC=5, … 20×100 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 Apr. 20.33 UT: m1=7.4, Dia.=4′, DC=5, … 25×100 B … Jose Guilherme Aguiar (Campinas/SP, Brazil)
2020 Apr. 20.33 UT: m1=7.6, Dia.=5′, DC=5, … 15-cm L(42x) … Willian Souza (Sao Paulo-SP, Brazil)
2020 Apr. 20.30 UT: m1=7.6, Dia.=5′, DC=5, … 15-cm L(33x) … Willian Souza (Sao Paulo-SP, Brazil)
2020 Apr. 19.34 UT: m1=7.5:, … 25×100 B … Jose Guilherme Aguiar (Campinas/SP, Brazil)
2020 Apr. 18.71 UT: m1=8.1, Dia.=4.5’, DC=5, … 25-cm L(40x) … Chris Wyatt (Walcha, NSW, Australia) [Moonlight. Enhances strongly in Swan Band filter. Coma elongated to the SW, faint tail visible at x74, traced to 18’ in length in P.A. 220°. Opaque inner coma fading to semi-transparent outer coma, pale aqua-blue in colour. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 Apr. 18.34 UT: m1=7.6, Dia.=4′, DC=5, … 25×100 B … Jose Guilherme Aguiar (Campinas/SP, Brazil)
2020 Apr. 18.34 UT: m1=7.8, Dia.=4′, DC=5, … 15-cm L(50x) … Willian Souza (Sao Paulo-SP, Brazil)
2020 Apr. 18.33 UT: m1=7.8, Dia.=5′, DC=5, … 15-cm L(33x) … Willian Souza (Sao Paulo-SP, Brazil)
2020 Apr. 17.34 UT: m1=7.7, Dia.=3′, DC=4, … 25×100 B … Jose Guilherme Aguiar (Campinas/SP, Brazil)
2020 Apr. 17.34 UT: m1=7.9, Dia.=4′, DC=4, … 15-cm L(50x) … Willian Souza (Sao Paulo-SP, Brazil)
2020 Apr. 17.31 UT: m1=7.9, Dia.=5′, DC=4, … 15-cm L(30x) … Willian Souza (Sao Paulo-SP, Brazil)
2020 Apr. 16.37 UT: m1=7.6, Dia.=7.0’, DC=3/, … 25-cm L(52x) … Gonzalo Vargas (Cochabamba, Bolivia) [Some Moon light interference, coma appear dense but there is no a remarkable central zone, using pollution filter green color is clear]
2020 Apr. 16.34 UT: m1=7.7, Dia.=6′, DC=4, … 7×50 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Moonlight]
2020 Apr. 16.33 UT: m1=7.8, Dia.=5′, DC=5, … 20×100 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Moonlight]
2020 Apr. 14.34 UT: m1=7.8, Dia.=3′, DC=3, … 25×100 B … Jose Guilherme Aguiar (Campinas/SP, Brazil)
2020 Apr. 13.34 UT: m1=7.8, Dia.=3′, DC=3/, … 25×100 B … Jose Guilherme Aguiar (Campinas/SP, Brazil)
2020 Apr. 12.75 UT: m1=7.9, Dia.=3.7’, DC=5/, … 25-cm L(40x) … Chris Wyatt (Walcha, NSW, Australia) [Moonlight … Appears faintly stellar in good seeing. Well condensed opaque inner coma, gradually fading to semi-transparent outer coma. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 Apr. 12.35 UT: m1=8.1, Dia.=3′, DC=4, … 11×80 B … Jose Guilherme Aguiar (Campinas/SP, Brazil)
2020 Apr. 12.34 UT: m1=7.9, Dia.=3′, DC=3/, … 25×100 B … Jose Guilherme Aguiar (Campinas/SP, Brazil)
2020 Apr. 11.79 UT: m1=7.8, Dia.=4’, DC=5, … 15×70 B … Michael Mattiazzo (Swan Hill, Australia)
2020 Apr. 11.73 UT: m1=8.0, Dia.=4’, DC=5, … 25-cm L(40x) … Chris Wyatt (Walcha, NSW, Australia) [Enhances strongly in Swan Band filter. Faint transparent outer coma, gradually brightening to an opaque inner coma with compact centre, not stellar. Visible in 7×50 B’s as a faint smudge. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]

C/2020 F5 (MASTER)
2020 Apr. 22.44 UT: m1=15.4, Dia.=0.3’, DC=3/, … 40-cm L f:4(261x) … Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, close to mag 11.4 star but resolvable. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]

C/2020 F3 (NEOWISE)
2020 May  25.93 UT: m1=8.2, Dia.=8′, DC=5, … 20×100 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Comet altitude: 15°]
2020 May  25.92 UT: m1=8.0, Dia.=10′, DC=4, … 7×50 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Comet altitude: 19°]
2020 May  20.96 UT: m1=9.2, Dia.=3.4’, DC=3, … 25-cm L(56x) … Gonzalo Vargas (Cochabamba Bolivia)
2020 May  19.93 UT: m1=9.1, Dia.=6′, DC=2/, … 20×100 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 May  17.93 UT: m1=9.2, Dia.=4′, DC=2, … 20×100 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 May  16.93 UT: m1=9.5, Dia.=3′, DC=2/, … 22-cm L(60x) … Marco Antonio Coelho Goiato (Araçatuba, Brazil) [near a star with m1: 10.47]
2020 May  16.35 UT: m1=9.1, Dia.=4.2’, DC=5/, … 25-cm L f:5(40x) … Chris Wyatt (Walcha, NSW, Australia) [Semi-transparent outer coma brightens to an opaque inner coma with faint stellar pseudo-nucleus visible in good seeing. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 May  15.38 UT: m1=9.4, Dia.=4′, … 15×80 B … David A. J. Seargent (Cowra, NSW, Australia) [Enhanced using Swan Band filter]
2020 May  14.36 UT: m1=9.5, Dia.=4′, … 25×100 B … David A. J. Seargent (Cowra, NSW, Australia)
2020 May  14.36 UT: m1=9.7, Dia.=5’, DC=3/, … 25-cm L f:5(40x) … Chris Wyatt (Walcha, NSW, Australia) [Faint background star in coma to West. Diffuse semi-transparent coma, small opaque weakly condensed centre. Enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 May  11.39 UT: m1=9.1, Dia.=4, … 25×100 B … David A. J. Seargent (Cowra, NSW, Australia) [Moderate enhancement using Swan Band filter]
2020 May  10.95 UT: m1=10.0, Dia.=3′, DC=3, … 22-cm L (60x) … Marco Antonio Coelho Goiato (Araçatuba, Brazil) … [ enhancement with comet filter ]
2020 May  10.37 UT: m1=9.9, Dia.=4.6’, DC=4, … 25-cm L f:5(40x) … Chris Wyatt (Walcha, NSW, Australia) [Enhances in Swan Band filter, very diffuse coma moderately condensed. Close to 10.3 mag star on NW edge of coma. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 Apr. 26.94 UT: m1=11.3, Dia.=2′, DC=2/, … 22-cm L(160x) … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 Apr. 25.42 UT: m1=10.3, Dia.=3′, … 25.4-cm L(71x) … David A. J. Seargent (Cowra, NSW, Australia)
2020 Apr. 25.38 UT: m1=10.3, Dia.=6’, DC=3, … 25-cm L f:5(40x) … Chris Wyatt (Walcha, NSW, Australia) [Coma weak and transparent, faint background stars in coma. Enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2020 Apr. 24.40 UT: m1=10.8, Dia.=4.9’, DC=2/, … 40-cm L f:4(59x) … Chris Wyatt (Walcha, NSW, Australia) [Faint background stars in coma, very diffuse coma. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2020 Apr. 22.45 UT: m1=10.3, Dia.=5’, DC=3/, … 40-cm L f:4(59x) … Chris Wyatt (Walcha, NSW, Australia) [Coma large and diffuse, mag 9.8 star in coma on South-West edge. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 Apr. 21.94 UT: m1=11.8, Dia.=1′, DC=3/, … 22-cm L(160x) … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 Apr. 19.39 UT: m1=11.4, Dia.=3.2’, DC=3, … 40-cm L(59x) … Chris Wyatt (Walcha, NSW, Australia) [Very diffuse coma with small opaque centre. Enhances slightly in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2020 Apr. 11.45 UT: m1=13.5:, Dia.=2’, DC=1, … 20-cm L(70x) … Michael Mattiazzo (Swan Hill, Australia)
2020 Apr. 11.38 UT: m1=13.5, Dia.=0.7’, DC=2/, … 25-cm L(125x) … Chris Wyatt (Walcha, NSW, Australia) [Very diffuse, close to mag 11.2 star. Windy conditions. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]

C/2020 A2 (Iwamoto)
2020 Mar. 21.46 UT: m1=[12.2, … 40.0-cm L f/4.5(257x) … Seiichi Yoshida (Ibaraki, Japan)
2020 Mar. 15.79 UT: m1=12.5:, Dia.=3′, DC=2, … 25.4-cm L(120x) … Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.35]
2020 Feb. 28.72 UT: m1=11.2, Dia.=2.1′, DC=2/, … 25.4-cm L(120x) … Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.30]
2020 Feb. 25.70 UT: m1=11.8, Dia.=1.5′, DC=3, … 25.4-cm L F/4.7(70.5x) … Danil Sidorko (Korenovsk, Russia)
2020 Feb. 23.84 UT: m1=11.5, Dia.=2′, DC=2, … 25.4-cm L(120x) … Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.41]
2020 Feb. 06.10 UT: m1=10.8, Dia.=2′, DC=2/, … 25.4-cm L(120x) … Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.19]
2020 Feb. 05.07 UT: m1=11.3, Dia.=1.7’, DC=2/, … 25.4-cm L(120x) … Alexsandr Morozov (Novozybkov, Russia) [method S, green zone]
2020 Feb. 03.19 UT: m1=9.6, Dia.=5′, DC=3, … 20-cm SCT(77x) … Juan Jose Gonzalez (Cordal de Neda – Abadín, Lugo, Spain, 43º 21′ N, 7º 27′ W, alt. 780 m) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.4]
2020 Jan. 31.83 UT: m1=10.9, Dia.=2.8′, DC=4/, … 40.0-cm L f/4.5(75x) … Seiichi Yoshida (Ibaraki, Japan)

C/2019 Y4 (ATLAS)
2020 May  18.84 UT: m1=9.8, Dia.=3′, DC=2, … 25.4-cm L(120x) … Alexsandr Morozov (Novozybkov, Russia)
2020 May  18.14 UT: m1=8.2, Dia.=4′, DC=1/, … 20-cm SCT(77x) … Juan Jose Gonzalez (Puerto de la Cubilla, Asturias, Spain, 42º 59′ N, 5º 54′ W, alt. 1680 m) [Astronomical twilight. Mountain location, very clear sky. Altitude: 7°. Sidgwick method. Tycho-2 comparison stars. SQM: 19.2]
2020 May   12.82 UT: m1=8.2, Dia.=15’, … 20×80 B … Toni Scarmato (Calabria, Italy)
2020 May  11.91 UT: m1=9.1, Dia.=&5′, DC=2, … 20.0 L(42x) … Alex Scholten (Eerbeek, Holand) [slightly oval coma]
2020 May  10.82 UT: m1=9.3, Dia.=6′, DC=3/, … 13-cm L(26x) … Alexsandr Morozov (Sukhinichi, Russia)
2020 Apr. 26.80 UT: m1=9.8, Dia.=8′, DC=1/, … 25.4-cm L(48x) … Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.42]
2020 Apr. 25.77 UT: m1=9.2, Dia.=2’x4′, DC=2, … 25.4-cm L F/4.7(70.5x) … Danil Sidorko (Korenovsk, Russia)
2020 Apr. 22.84 UT: m1=8.9, Dia.=10′, DC=2/, … 25.4-cm L(30x) … Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.59]
2020 Apr. 19.16 UT: m1=9.4, Dia.=3′, DC=2, … 30×125 B … Carl Hergenrother
2020 Apr. 17.89 UT: m1=8.9, Dia.=8′, DC=1/, … 10×50 B … Piotr Guzik
2020 Apr. 17.88 UT: m1=8.9, Dia.=&8′, DC=2, … 15×80 B … Alex Scholten (Eerbeek, Holand)
2020 Apr. 17.85 UT: m1=9.0, Dia.=2′, DC=3, … 32.0-cm L(45x) … Uwe Pilz
2020 Apr. 17.14 UT: m1=9.2, Dia.=3′, DC=2, … 30×125 B … Carl Hergenrother
2020 Apr. 16.90 UT: m1=9.0, Dia.=9′, DC=2/, … 11.4-cm L(40x) … Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.51]
2020 Apr. 16.79 UT: m1=10.52 CCD, Dia.=1.11′, … 25-cm L+ CCD + R filter … T. Scarmato & A. Brosio (Calabria, Italy) [Afrho=458 cm for 50000 km of spatial aperture]
2020 Apr. 16.21 UT: m1=8.5, Dia.=13′, DC=2, … 20×80 B … C. S. Morris (Fillmore, CA, U.S.A.)
2020 Apr. 15.85 UT: m1=11.28 CCD, Dia.=1.11′, … 25-cm L + CCD + R filter … T. Scarmato & A. Brosio (Calabria, Italy) [Afrho=238 for 50000 km]
2020 Apr. 15.23 UT: m1=8.4, Dia.=13′, DC=2, … 20×80 B … C. S. Morris (Fillmore, CA, U.S.A.)
2020 Apr. 14.90 UT: m1=9.5, Dia.=7′, DC=3, … 25.4-cm L(30x) … Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.77]
2020 Apr. 14.23 UT: m1=8.4, Dia.=13′, DC=1/, … 20×80 B … C. S. Morris (Fillmore, CA, U.S.A.)
2020 Apr. 12.76 UT: m1=10.76 CCD, Dia.=1.11′, … 25-cm L + ccd + R filter … T. Scarmato & A. Brosio (Calabria, Italy) [Afrho=449 cm for 50000 km]
2020 Apr. 11.79 UT: m1=8.7, Dia.=8′, DC=3, … 25.4-cm L(48x) … Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.49]
2020 Apr. 11.19 UT: m1=8.0, Dia.=13′, … 20×80 B … C. S. Morris (Fillmore, CA, U.S.A.)
2020 Apr. 10.77 UT: m1=10.8 CCD, Dia.=1.11′, … 25-cm L + ccd + R filter … Toni Scarmato & A.Brosio (Rosarno, Calabria, Italy) [Afrho 389 cm for 50000 km of aperture]
2020 Apr. 10.75 UT: m1=8.6, Dia.=5′, DC=4/, … 25.4-cm L F/4.7 (70.5x) … Danil Sidorko (Korenovsk, Russia)
2020 Apr. 09.81 UT: m1=11.7 CCD, Dia.=1.11′, … 25-cm L + CCD + R filter … Toni Scarmato & A. Brosio (Rosarno, Calabria, Italy) [Afrho 190 cm ap 50000 km]
2020 Apr. 08.85 UT: m1=11.2 CCD, Dia.=1.11′, … 25-cm L+ CCD + R filter … Toni Scarmato & A. Brosio (Rosarno, Calabria, Italy) [Afrho 336 cm ap 50000 km, about 50% since my last observation]
2020 Apr. 02.39 UT: m1=8.0, Dia.=9′, DC=3, … 10×50 B … Carl Hergenrother
2020 Apr. 02.23 UT: m1=6.9:, Dia.=19′, DC=2, … 10×50 B … C. S. Morris (Fillmore, CA, U.S.A.)
2020 Apr. 02.22 UT: m1=7.3, Dia.=15′, DC=3, … 20×80 B … C. S. Morris (Fillmore, CA, U.S.A.)
2020 Apr. 02.12 UT: m1=7.8, Dia.=9′, DC=3/, … 12-cm R(30x) … Maik Meyer
2020 Apr. 02.08 UT: m1=8.1, Dia.=9′, DC=4, … 25×100 B … Piotr Guzik
2020 Apr. 01.10 UT: m1=7.8, Dia.=9′, DC=3/, … 12-cm R(30x) … Maik Meyer
2020 Apr. 01.06 UT: m1=7.9, Dia.=10′, DC=3, … 10×50 B … Piotr Guzik
2020 Mar. 31.77 UT: m1=8.2, Dia.=10′, DC=4, … 25.4-cm L(48x) … Alexsandr Morozov (Novozybkov, Russia) [method S, green zone, Moon 43%]
2020 Mar. 31.11 UT: m1=7.6, Dia.=&15′, DC=2, … 15×80 B … Alex Scholten
2020 Mar. 30.78 UT: m1=7.9, Dia.=10′, DC=4, … 10×50 B … Piotr Guzik
2020 Mar. 30.28 UT: m1=8.0, Dia.=10′, DC=3, … 10×50 B … Carl Hergenrother
2020 Mar. 30.23 UT: m1=7.0, Dia.=19′, DC=3, … 10×50 B … C. S. Morris (Fillmore, CA, U.S.A.)
2020 Mar. 29.90 UT: m1=7.6, Dia.=10.5′, DC=4, … 12-cm R(30x) … Maik Meyer
2020 Mar. 29.08 UT: m1=7.7, Dia.=10′, DC=3/, … 10×50 B … Piotr Guzik
2020 Mar. 28.97 UT: m1=7.9, Dia.=7′, DC=5, … 7×50 B … Toni Scarmato
2020 Mar. 28.95 UT: m1=8.5, Dia.=8.5′, DC=5/, … 25×100 B … Jakub Cerny
2020 Mar. 28.87 UT: m1=7.7, Dia.=&15′, DC=2, … 15×80 B … Alex Scholten
2020 Mar. 28.86 UT: m1=7.5, Dia.=9.5′, DC=4, … 12-cm R(30x) … Maik Meyer
2020 Mar. 28.13 UT: m1=7.2, Dia.=15′, DC=4, … 10×50 B … Carl Hergenrother
2020 Mar. 28.12 UT: m1=7.6, Dia.=9′, DC=5, … 30×125 B … Carl Hergenrother
2020 Mar. 27.84 UT: m1=7.7, Dia.=&15′, DC=2, … 15×80 B … Alex Scholten
2020 Mar. 27.82 UT: m1=7.6, Dia.=10.5′, DC=4, … 12-cm R(30x) … Maik Meyer
2020 Mar. 27.78 UT: m1=8.0, Dia.=8′, DC=3/, … 10×50 B … Piotr Guzik
2020 Mar. 26.97 UT: m1=7.9, Dia.=10′, DC=4, … 10×50 B … Piotr Guzik
2020 Mar. 25.82 UT: m1=7.6, Dia.=11.5′, DC=4, … 12-cm R(30x) … Maik Meyer
2020 Mar. 25.77 UT: m1=8.0, Dia.=10′, DC=4, … 10×50 B … Piotr Guzik
2020 Mar. 25.16 UT: m1=8.0, Dia.=8′, DC=4, … 30×125 B … Carl Hergenrother
2020 Mar. 25.05 UT: m1=8.1, Dia.=10′, DC=3, … 10×50 B … Piotr Guzik
2020 Mar. 24.83 UT: m1=8.4, Dia.=&12′, DC=2, … 15×80 B … Alex Scholten
2020 Mar. 24.82 UT: m1=7.6, Dia.=10.5′, DC=4, … 12-cm R(30x) … Maik Meyer
2020 Mar. 24.80 UT: m1=8.3, Dia.=10.5′, DC=4/, … 20×80 B … Marek Biely
2020 Mar. 24.78 UT: m1=8.2, Dia.=11′, DC=5, … 25.4-cm L(48x) … Alexsandr Morozov
2020 Mar. 24.14 UT: m1=7.9, Dia.=9′, DC=4, … 30×125 B … Carl Hergenrother
2020 Mar. 24.00 UT: m1=8.1, Dia.=12′, DC=3/, … 10×50 B … Piotr Guzik
2020 Mar. 23.90 UT: m1=8.7, Dia.=8.8′, DC=4, … 25×100 B … Jakub Cerny
2020 Mar. 23.90 UT: m1=8.7, Dia.=8.5′, DC=3/, … 20×80 B … Marek Biely
2020 Mar. 23.81 UT: m1=7.6, Dia.=10′, DC=4, … 12-cm R(30x) … Maik Meyer
2020 Mar. 22.84 UT: m1=8.4, Dia.=&12′, DC=2, … 15×80 B … Alex Scholten
2020 Mar. 22.81 UT: m1=7.8, Dia.=10′, DC=3, … 7×50 B … Uwe Pilz
2020 Mar. 22.81 UT: m1=7.7, Dia.=12′, DC=3/, … 12-cm R(30x) … Maik Meyer
2020 Mar. 22.13 UT: m1=7.9, Dia.=9′, DC=4, … 30×125 B … Carl Hergenrother
2020 Mar. 22.12 UT: m1=8.1, Dia.=12′, DC=3, … 10×50 B … Piotr Guzik
2020 Mar. 22.85 UT: m1=8.9, Dia.=&10′, DC=3, … 15×80 B … Alex Scholten
2020 Mar. 21.81 UT: m1=7.7, Dia.=12′, DC=3/, … 12-cm R(30x) … Maik Meyer
2020 Mar. 21.43 UT: m1=8.9, Dia.=6.5′, DC=2/, … 40.0-cm L f/4.5(36x) … Seiichi Yoshida
2020 Mar. 21.16 UT: m1=8.5, Dia.=5′, DC=2, … 20-cm L(42x) … Alex Scholten
2020 Mar. 20.17 UT: m1=8.1, Dia.=8′, DC=3, … 30×125 B … Carl Hergenrother
2020 Mar. 19.81 UT: m1=7.9, Dia.=13′, DC=3, … 12-cm R(30x) … Maik Meyer
2020 Mar. 19.18 UT: m1=8.0, Dia.=15′, DC=1/, … 20×80 B … C. S. Morris (Fillmore, CA, U.S.A.)
2020 Mar. 18.86 UT: m1=8.4, Dia.=10′, DC=3, … 10×50 B … Piotr Guzik
2020 Mar. 18.80 UT: m1=8.0, Dia.=12.5′, DC=3, … 12.0-cm R f/5(30x) … Maik Meyer
2020 Mar. 17.87 UT: m1=8.4, Dia.=10′, DC=3, … 10×50 B … Piotr Guzik
2020 Mar. 17.80 UT: m1=8.0, Dia.=11′, DC=3, … 12-cm R(30x) … Maik Meyer
2020 Mar. 16.88 UT: m1=8.5, Dia.=12′, DC=4, … 8×26 B … Timo Karhula
2020 Mar. 16.77 UT: m1=8.4, Dia.=12′, DC=3, … 10×50 B … Piotr Guzik
2020 Mar. 15.80 UT: m1=8.5, Dia.=14′, DC=3, … 10×50 B … Piotr Guzik
2020 Mar. 15.80 UT: m1=8.7, Dia.=12′, DC=3, … 20×100 B … Sandor Szabo
2020 Mar. 15.80 UT: m1=8.4, Dia.=9.5′, DC=3, … 12-cm R(30x) … Maik Meyer
2020 Mar. 15.77 UT: m1=8.5, Dia.=10′, DC=4/, … 25.4-cm L(30x) … Alexsandr Morozov
2020 Mar. 15.12 UT: m1=8.4, Dia.=9′, DC=4, … 30×125 B … Carl Hergenrother
2020 Mar. 14.94 UT: m1=8.6, Dia.=12′, DC=3, … 10×50 B … Piotr Guzik
2020 Mar. 14.90 UT: m1=8.6, Dia.=12′, DC=3, … 11×80 B … Carles Labordena
2020 Mar. 14.85 UT: m1=8.2, Dia.=12′, DC=3, … 10×50 B … Juan Jose Gonzalez
2020 Mar. 14.80 UT: m1=8.4, Dia.=11′, DC=3, … 12-cm R(30x) … Maik Meyer
2020 Mar. 13.96 UT: m1=8.6, Dia.=10′, DC=3, … 18×50 B … Timo Karhula
2020 Mar. 13.77 UT: m1=9.0, Dia.=10′, DC=2, … 10×50 B … Piotr Guzik
2020 Mar. 13.73 UT: m1=9.5, Dia.=6.5′, DC=4, … 25.4-cm L(70.5x) … Danil Sidorko
2020 Mar. 12.82 UT: m1=9.2, Dia.=–‘, DC=–, … 7×50 B … Uwe Pilz
2020 Mar. 12.81 UT: m1=8.9, Dia.=&7′, DC=2, … 20-cm L(42x) … Alex Scholten
2020 Mar. 12.80 UT: m1=9.0, Dia.=7′, DC=2, … 12-cm R(30x) … Maik Meyer
2020 Mar. 12.77 UT: m1=9.6, Dia.=7′, DC=3, … 25×100 B … Piotr Guzik
2020 Mar. 12.77 UT: m1=9.4, Dia.=10′, DC=2, … 10×50 B … Piotr Guzik
2020 Mar. 12.73 UT: m1=10.2, Dia.=2.5′, DC=5, … 25.4-cm L(70.5x) … Danil Sidorko
2020 Mar. 11.78 UT: m1=9.5, Dia.=&12′, DC=2, … 10×50 B … Piotr Guzik
2020 Mar. 11.77 UT: m1=9.8, Dia.=8′, DC=3, … 25×100 B … Piotr Guzik
2020 Mar. 06.45 UT: m1=11.5, Dia.=5′, DC=4, … 38-cm L(64x) … Bob King
2020 Mar. 05.27 UT: m1=10.7 CCD G, Dia.=12.4′, DC=-, … 28-cm T f/2.2 + CCD G … Terry Lovejoy
2020 Mar. 03.88 UT: m1=12.4 CCD G, Dia.=2.4′, DC=-, … 28-cm T f/2.2 + CCD G … Michael Jäger
2020 Feb. 29.96 UT: m1=11.9, Dia.=1.5′, DC=3, … 25.4-cm L(120x) … Alexsandr Morozov
2020 Feb. 28.80 UT: m1=12.6, Dia.=1.2′, DC=5, … 60.0-cm L(244x) … Sandor Szabo
2020 Feb. 28.15 UT: m1=11.5 CCD G, Dia.=0.25′, DC=-, … 28-cm T f/2.2 + CCD G … Michael Jäger
2020 Feb. 24.89 UT: m1=13.2, Dia.=1.7′, DC=4, … 60.0-cm L(187x) … Sandor Szabo
2020 Feb. 24.22 UT: m1=13.3, Dia.=0.9’, DC=3/, … 41-cm L(70x) … Alan Hale
2020 Feb. 20.10 UT: m1=13.8, Dia.=1.3′, DC=4, … 38-cm L(242x) … Bob King
2020 Feb. 19.94 UT: m1=11.7, Dia.=3′, DC=2, … 20-cm SCT(77x) … Juan Jose Gonzalez
2020 Feb. 18.93 UT: m1=14.4, Dia.=0.7′, DC=3, … 60.0-cm L f/4(305x) … Sandor Szabo (Sopron, Hungary)
2020 Feb. 18.81 UT: m1=14.7, Dia.=0.5′, DC=4, … 60.0-cm L f/4(305x) … Sandor Szabo (Sopron, Hungary)
2020 Feb. 18.39 UT: m1=12.5 CCD, Dia.=4′, … 28-cm SCT + CCD … Michael Mattiazzo (T68 New Mexico remotely, Australia)
2020 Feb. 17.27 UT: m1=13.8, Dia.=4.4′, … Carl Hergenrother
2020 Feb. 17.10 UT: m1=14.0, Dia.=0.5’, … 38-cm L(200x) … Bob King (Minnesota, USA)
2020 Feb. 03.94 UT: m1=16.5 CCD, Dia.=0.4, … 20.0-cm L + CCD … Artyom Novichonok

C/2019 Y1 (ATLAS)
2020 May  26.02 UT: m1=9.8, Dia.=5′, DC=2/, … 20-cm SCT(77x) … Juan Jose Gonzalez (Renorios – Bello – Aller, Asturias, Spain, 43º 08′ N, 5º 38′ W, alt. 1200 m) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2020 May  21.76 UT: m1=10.1, Dia.=&3′, DC=3, … 10.2-cm R(58.8x) … Andrey Semenyuta (Pavlodar, Kazakhstan)
2020 May  19.80 UT: m1=10.2, Dia.=2′, DC=3, … 25.4-cm L F/4.7(70.5x) … Danil Sidorko (Korenovsk, Russia)
2020 May  18.09 UT: m1=9.5, Dia.=5′, DC=3, … 20-cm SCT(77x) … Juan Jose Gonzalez (Puerto de la Cubilla, Asturias, Spain, 42º 59′ N, 5º 54′ W, alt. 1680 m) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.4]
2020 May  17.85 UT: m1=9.6, Dia.=6′, DC=3, … 25.4-cm L(48x) … Alexsandr Morozov (Novozybkov, Russia)
2020 May  11.80 UT: m1=9.0, Dia.=3′, DC=3, … 25.4-cm L F/4.7(70.5x) … Danil Sidorko (Korenovsk, Russia)
2020 May  10.84 UT: m1=9.5, Dia.=5′, DC=5, … 13-cm L(26x) … Alexsandr Morozov (Sukhinichi, Russia)
2020 Apr. 30.77 UT: m1=8.1, Dia.=4′, DC=3, … 25.4-cm L F/4.7(70.5x) … Danil Sidorko (Korenovsk, Russia)
2020 Apr. 29.78 UT: m1=7.8, Dia.=5.5′, DC=3, … 25.4-cm L F/4.7(70.5x) … Danil Sidorko (Korenovsk, Russia)
2020 Apr. 26.78 UT: m1=8.5, Dia.=4′, DC=4/, … 25.4-cm L(48x) … Alexsandr Morozov (Novozybkov, Russia) [method M, Lm=6.35]
2020 Apr. 25.77 UT: m1=7.5, Dia.=4.5′, DC=3, … 25.4-cm L F/4.7(70.5x) … Danil Sidorko (Korenovsk, Russia)
2020 Apr. 22.83 UT: m1=7.8, Dia.=4.5′, DC=4/, … 25.4-cm L(30x) … Alexsandr Morozov (Novozybkov, Russia) [method M, Lm=6.59]
2020 Apr. 16.88 UT: m1=8.2, Dia.=6′, DC=5, … 11.4-cm L(25x) … Alexsandr Morozov (Novozybkov, Russia) [method M, Lm=6.51]
2020 Apr. 15.50 UT: m1=8.9, Dia.=6′, DC=2, … 20×80 B … C. S. Morris (Fillmore, CA, U.S.A.)
2020 Apr. 14.88 UT: m1=8.7, Dia.=3′, DC=4/, … 25.4-cm L(30x) … Alexsandr Morozov (Novozybkov, Russia) [method M, Lm=6.77]
2020 Apr. 11.76 UT: m1=8.4, Dia.=3.8′, DC=4, … 25.4-cm L(48x) … Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.41]
2020 Mar. 31.74 UT: m1=9.0, Dia.=1.5′, DC=4/, … 25.4-cm L(48x) … Alexsandr Morozov (Novozybkov, Russia) [method S, green zone, Moon 43%]
2020 Mar. 24.75 UT: m1=9.0, Dia.=2.5′, DC=4/, … 25.4-cm L(48x) … Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.30]
2020 Mar. 18.79 UT: m1=7.7, Dia.=5′, DC=3/, … 12.0-cm R f/5(30x) … Maik Meyer (Linter Germany)
2020 Mar. 15.73 UT: m1=8.9, Dia.=3.5′, DC=4/, … 25.4-cm L(48x) … Alexsandr Morozov (Novozybkov, Russia) [method M, Lm=6.35]
2020 Mar. 14.83 UT: m1=8.4, Dia.=3′, DC=7, … 25×100 B … Juan Jose Gonzalez (Alto del Castro, Leon, Spain, 42º 55′ N, 5º 48′ W, alt. 1720 m) [Altitude: 11°. Morris method. Tycho-2 comparison stars. SQM: 20.8]
2020 Mar. 14.82 UT: m1=9.3, Dia.=2.5′, DC=6, … 15-cm L(30x) … Carlos Labordena (Castellón, España)
2020 Feb. 21.79 UT: m1=9.7, Dia.=3′, DC=3, … 20-cm SCT(80x) … Carlos Labordena (Castellón, España)
2020 Feb. 19.81 UT: m1=9.6, Dia.=4′, DC=3, … 20-cm SCT(77x) … Juan Jose Gonzalez (Alto del Trichero, León, Spain, 42º 46′ N, 5º 53′ W, alt. 1190 m) [Zodiacal light. Altitude: 16°. Sidgwick method. Tycho-2 comparison stars. SQM: 20.4]
2020 Feb. 14.79 UT: m1=10.8, Dia.=1.5′, DC=3, … 20-cm SCT(80x) … Carlos Labordena (Castellón, España) [no tail]
2020 Jan. 31.78 UT: m1=11.7, Dia.=2′, DC=3, … 23.5-cm SCT(94x) … Carlos Labordena (Castellón, España) [no tail]
2020 Jan. 31.40 UT: m1=11.4, Dia.=1.4′, DC=3/, … 40.0-cm L f/4.5(144x) … Seiichi Yoshida (Ibaraki, Japan)

C/2019 U6 (Lemmon)
2020 May  25.95 UT: m1=7.0, Dia.=7′, DC=6/, … Tail=45 arcmin. in AP: 140 deg., … 20×100 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Comet altitude: 20°]
2020 May  21.95 UT: m1=7.1, Dia.=7’, DC=5, … 25-cm L f/4.5(56x) … Gonzalo Vargas (Cochabamba, Bolivia) [Comet’s coma appear some longer from AP angle from 165 to 177 degrees, some moments like a border tail, best view with averted vision]
2020 May  19.95 UT: m1=7.4, Dia.=6′, DC=6/, Tail=30 arcmin. in PA: 135°, … 20×100 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 May  19.94 UT: m1=7.4, Dia.=7′, DC=5, … 7×50 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 May  17.95 UT: m1=7.4, Dia.=6′, DC=6, Tail=30 arcmin. in PA: 135°, … 20×100 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 May  17.94 UT: m1=7.4, Dia.=7′, DC=5, … 7×50 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 May  17.36 UT: m1=7.3, … 10×50 … David A. J. Seargent (Cowra, NSW, Australia)
2020 May  16.98 UT: m1=8.3, Dia.=5.0’, DC=5, … 25-cm L(56x) … Gonzalo Vargas (Cochabanba Bolivia)
2020 May  16.95 UT: m1=7.5, Dia.=6′, DC=5, Tail=15 arcmin. in PA: 135°, … 20 x 100 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil) [near star with m1: 8.09]
2020 May  16.94 UT: m1=7.4, Dia.=6′, DC=5, … 7×50 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 May  16.35 UT: m1=7.9, Dia.=5.2’, DC=6, … 10×50 R … Chris Wyatt (Walcha, NSW, Australia) [Close to stars, Opaque centre with faint stellar pseudo-nucleus, semi-transparent outer coma. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 May  15.37 UT: m1=7.4, … 10×50 B … David A. J. Seargent (Cowra, NSW, Australia)
2020 May  14.38 UT: m1=7.9, … 25×100 B … David A. J. Seargent (Cowra, NSW, Australia)
2020 May  14.35 UT: m1=8.0, Dia.=6.4’, DC=6, … 10×50 R … Chris Wyatt (Walcha, NSW, Australia) [Small diffuse and opaque outer coma, slightly brighter inner coma with stellar pseudo-nucleus. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 May  11.92 UT: m1=7.9, Dia.=4, DC=6, … 25×100 B … José Guilherme de S. Aguiar (Campinas/SP, Brazil)
2020 May  11.38 UT: m1=8.4, D=6, DC=5, … 25×100 B … David A. J. Seargent (Cowra, NSW, Australia) [Some enhancement using Swan Band filter]
2020 May  10.93 UT: m1= 7.8, Dia.=6′, DC=5, Tail= 15 arcmin. in PA: 120°, … 20 x 100 B … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 May  10.92 UT: m1=7.9, Dia.=3′, DC=6, … 25×100 B … José Guilherme de S. Aguiar (Campinas/SP, Brazil)
2020 May  10.36 UT: m1=8.1, Dia.=7.3’, DC=6, … 11×70 B … Chris Wyatt (Walcha, NSW, Australia) [Diffuse outer coma, brightening to an opaque centre. Well condensed centre with stellar pseudo-nucleus. Enhances strongly in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 May  09.90 UT: m1=7.8, Dia.=4, DC=6, … 25×100 B … José Guilherme de S. Aguiar (Campinas/SP, Brazil)
2020 May  08.91 UT: m1=8.0, Dia.=3, DC=6, … 25×100 B … José Guilherme de S. Aguiar (Campinas/SP, Brazil)
2020 Apr. 26.93 UT: m1=9.6, Dia.=4′, DC=3, … 22-cm L(60x) … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 Apr. 25.37 UT: m1=9.3, Dia.=5.5’, DC=5, … 25-cm L f:5(40x) … Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, semi-transparent outer edge brightening to an opaque inner coma, almost stellar at centre. Enhances well in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 Apr. 24.38 UT: m1=9.3, Dia.=5’, DC=5/, … 40-cm L f:4(59x) … Chris Wyatt (Walcha, NSW, Australia) [Coma pale auqa-blue in colour, faint stellar pseudo-nucleus visible in good seeing. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 Apr. 22.40 UT: m1=9.6, Dia.=5.3’, DC=5/, … 40-cm L f:4(59x) … Chris Wyatt (Walcha, NSW, Australia) [Enhances strongly in Swan Band filter. Very diffuse outer coma, sometimes appears to have a faint stellar pseudo-nucleus at centre. Inner coma appears elongated to the NW. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 Apr. 19.94 UT: m1=10.3, Dia.=2′, DC=4, … 22-cm L(160x) … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 Apr. 19.38 UT: m1=10.4, Dia.=3.8’, DC=5, … 40-cm L(59x) … Chris Wyatt (Walcha, NSW, Australia) [Star in coma. Coma shows opaque centre, fading to edges, semi-transparent outer coma. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 Apr. 17.39 UT: m1=10.2, Dia.=4.6’, DC=4, … 25-cm L(40x) … Chris Wyatt (Walcha, NSW, Australia) [Coma shows opaque centre, moderately condensed fading to semi-transparent outer coma. Enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 Apr. 16.42 UT: m1=10.6, DC=4, … 25.4-cm L(71x) … David A. J. Seargent (Cowra, NSW, Australia) [Marginally enhanced through Swan Band filter]
2020 Apr. 14.40 UT: m1=10.4, Dia.=4.2’, DC=4, … 25-cm L(40x) … Chris Wyatt (Walcha, NSW, Australia) [Coma dims in Swan Band filter. Very diffuse semi-transparent outer coma brightening to an opaque centre. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 Apr. 11.40 UT: m1=10.7, Dia.=3’, DC=3, … 20-cm L(70x) … Michael Mattiazzo (Swan Hill, Australia)
2020 Apr. 11.39 UT: m1=10.5, Dia.=4.8’, DC=4/, … 25-cm L(40x) … Chris Wyatt (Walcha, NSW, Australia) [Diffuse semi-transparent outer coma, moderately condensed and opaque inner coma. Enhances in Swan Band filter. Windy conditions. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2020 Mar. 31.42 UT: m1=12.3, Dia.=2.5’, DC=2/, … 25-cm L(74x) … Chris Wyatt (Walcha, NSW, Australia) [Moonlight … Outer coma diffuse, subtle brightening to centre. Enhances slightly in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2020 Mar. 30.98 UT: m1=11.5, Dia.=1.5′, DC=3/, … 22-cm L(160x) … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 Mar. 20.42 UT: m1=12.4, Dia.=2.2’, DC=3, … 40-cm L f:4.5(108x) … Chris Wyatt (Walcha, NSW, Australia) [Asteroid showing cometary activity. Mag 14.7 background star in coma. Coma well diffused with opaque central condensation. Slight enhancement in Swan Band filter. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2020 Mar. 19.41 UT: m1=12.8, Dia.=2.2’, DC=3/, … 40-cm L f:4.5(108x) … Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse and transparent and quite extended from the centre, inner coma opaque and moderately condensed. Asteroid showing cometary activity. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2020 Mar. 18.41 UT: m1=13.5, Dia.=1.4’, DC=3, … 40-cm L f:4.5(108x) … Chris Wyatt (Walcha, NSW, Australia) [No enhancement in Swan Band filter. Asteroid showing cometary activity. Coma diffuse with weakly condensed centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]

C/2018 N2 (ASASSN) 
2020 Jan. 31.48 UT: m1=12.5, Dia.=0.7′, DC=3/, … 40.0-cm L f/4.5(144x) … Seiichi Yoshida (Ibaraki, Japan)
2020 Jan. 29.79 UT: m1=12.4, Dia.=0.9′, DC=3, … 25.4-cm L f/5(104x) … Maik Meyer (Linter, Germany)
2020 Jan. 25.68 UT: m1=12.6, Dia.=0.5′, DC=3, … 25-cm L F:5(150x) … Danil Sidorko (Korenovsk, Russia)
2020 Jan. 23.68 UT: m1=12.6, Dia.=1′, DC=2, … 25.4-cm L(120x) … Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.41]
2020 Jan. 15.71 UT: m1=12.7, Dia.=0.7′, DC=2/, … 25.4-cm L(120x) … Alexsandr Morozov (Novozybkov, Russia) [method S, green zone]
2020 Jan 03.95 UT: m1=12.3, Dia.=0.8′, DC=3, … 25.4-cm L(120x) … Alexsandr Morozov (Novozybkov, Russia) [method S, green zone]

C/2018 F4 (PanSTARRS)
2020 Apr. 24.38 UT: m1=13.9, Dia.=0.7’, DC=2/, … 40-cm L f:4(182x) … Chris Wyatt (Walcha, NSW, Australia) [Low altitude= 11.2° … Poor seeing, difficult. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2020 Apr. 22.38 UT: m1=13.9, Dia.=1’, DC=2/, … 40-cm L f:4(108x) … Chris Wyatt (Walcha, NSW, Australia) [Low altitude= 11.7° … Very diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2020 Apr. 19.38 UT: m1=13.7, Dia.=0.8’, DC=2/, … 40-cm L(182x) … Chris Wyatt (Walcha, NSW, Australia) [Low altitude= 14.1°. Diffuse, weakly condensed. Visible in good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2020 Mar. 20.41 UT: m1=14.1, Dia.=1’, DC=3/, … 40-cm L f:4.5(108x) … Chris Wyatt (Walcha, NSW, Australia) [Moderately condensed and opaque inner coma surrounded by transparent outer coma. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2020 Mar. 19.40 UT: m1=14.0, Dia.=1’, DC=4, … 40-cm L f:4.5(108x) … Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, small and moderately condensed centre. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2020 Mar. 18.39 UT: m1=14.0, Dia.=1’, DC=3/, … 40-cm L f:4.5(108x) … Chris Wyatt (Walcha, NSW, Australia) [No enhancement in Swan Band filter, diffuse outer coma, small and moderately condensed central condensation. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]

C/2017 T2 (PANSTARRS)
2020 May 26.00 UT: m1=8.6, Dia.=5′, DC=5, Tail=0.2 deg. in PA: 280 deg., … 20-cm SCT(77x) … Juan Jose Gonzalez (Renorios – Bello – Aller, Asturias, Spain, 43º 08′ N, 5º 38′ W, alt. 1200 m) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2020 May 23.91 UT: m1=8.3, Dia.=4′, DC=4, … 25×100 B … Jorge Rallo (Coslada-Madrid, Spain) [Very faint coma, no visible tail] 2020 May 23.80 UT: m1=8.0, Dia.=5.3′, DC=4, … 25.4-cm L F/4.7(70.5x) … Danil Sidorko (Korenovsk, Russia)
2020 May 21.90 UT: m1=8.3, Dia.=4,5′, DC=4, … 25×100 B … Jorge Rallo (Coslada-Madrid, Spain) [Very faint coma. No visible tail]
2020 May 20.86 UT: m1=8.1, Dia.=4,5′, DC=4, … 25×100 B … Jorge Rallo (Coslada-Madrid, Spain) [Very faint coma, slightly brighter. No visible tail]
2020 May 21.86 UT: m1=9.3, Dia.=4′, DC=3 … 20.3-cm L F/6(37x) … Marian Legutko (Gliwice, Poland)
2020 May 19.90 UT: m1=8,3, Dia.=4,5′, DC=4, Tail= No visible tail, … 25×100 B … Jorge Rallo (Coslada-Madrid, Spain) [Very faint coma]
2020 May 19.90 UT: m1=8,3, Dia.=4,5′, DC=4, Tail= No visible tail, … 25×100 B … Jorge Rallo (Coslada-Madrid, Spain) [Very faint coma]
2020 May 19.80 UT: m1=8.2, Dia.=4′, DC=4, … 25.4-cm L F/4.7(70.5x) … Danil Sidorko (Korenovsk, Russia)
2020 May 18.87 UT: m1=8,2, Dia.=5′, DC=4, Tail= No visible tail, … 25×100 B … Jorge Rallo (Coslada-Madrid, Spain) [Very faint coma]
2020 May 18.07 UT: m1=8.7, Dia.=5′, DC=4, Tail= 0.2 deg. in PA: 250 deg., … 20-cm SCT(77x) … Juan Jose Gonzalez (Puerto de la Cubilla, Asturias, Spain, 42º 59′ N, 5º 54′ W, alt. 1680 m) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.4]
2020 May 17.86 UT: m1=8.4, Dia.=6′, DC=5/, … 25.4-cm L(30x) … Alexsandr Morozov (Novozybkov, Russia)
2020 May 11.80 UT: m1=7.7, Dia.=5.5′, DC=5, … 25.4-cm L F/4.7(70.5x) … Danil Sidorko (Korenovsk, Russia)
2020 May 11.89 UT: m1=7.9, Dia.=5′, DC=5, Tail= No visible tail, … 25×100 B … Jorge Rallo (Coslada-Madrid, Spain) [Faint coma … Significative brightening increase since last observation]
2020 May  10.85 UT: m1=8.4, Dia.=4.5′, DC=6, … 13-cm L(26x) … Alexsandr Morozov (Sukhinichi, Russia)
2020 Apr. 30.92 UT: m1=8.4, Dia.=3′, DC=4, Tail= No visible tail, … 25×100 B … Jorge Rallo (Coslada-Madrid, Spain) [Very faint coma … Moonlight]
2020 Apr. 30.77 UT: m1=8.4, Dia.=2′, DC=3/, … 25.4-cm L F/4.7(70.5x) … Danil Sidorko (Korenovsk, Russia)
2020 Apr. 29.78 UT: m1=8.0, Dia.=4′, DC=4, … 25-cm L F/4.7(70.5x) … Danil Sidorko (Korenovsk, Russia)
2020 Apr. 28.89 UT: m1=8.3, Dia.=4′, DC=4, Tail= No visible tail, … 25×100 B … Jorge Rallo (Coslada-Madrid, Spain) [Very faint coma]
2020 Apr. 27.86 UT: m1=8.4, Dia.=4′, DC=5, Tail= No visible tail, … 25×100 B … Jorge Rallo (Coslada-Madrid, Spain) [Very faint coma]
2020 Apr. 26.79 UT: m1=8.6, Dia.=4′, DC=4/, … 25.4-cm L(48x) … Alexsandr Morozov (Novozybkov, Russia) [method M, Lm=6.42]
2020 Apr. 25.77 UT: m1=8.0, Dia.=3′, DC=4/, … 25-cm L F/4.7(70.5x) … Danil Sidorko (Korenovsk, Russia)
2020 Apr. 24.90 UT: m1=8.3, Dia.=3′, DC=5, Tail= No visible, … 25×100 B … Jorge Rallo (Madrid, Spain) [Very faint coma]
2020 Apr. 22.85 UT: m1=8.8, Dia.=5′, DC=5/, … 25.4-cm L(48x) … Alexsandr Morozov (Novozybkov, Russia) [method M, Lm=6.59]
2020 Apr. 16.89 UT: m1=8.5, Dia.=4.2′, DC=5/, … 11.4-cm L(25x) … Alexsandr Morozov (Novozybkov, Russia) [method M, Lm=6.51]
2020 Apr. 16.16 UT: m1=7.9, Dia.=11′, DC=2, … 20×80 B … C. S. Morris (Fillmore, CA, U.S.A.)
2020 Apr. 15.17 UT: m1=7.9, Dia.=13′, DC=1, … 20×80 B … C. S. Morris (Fillmore, CA, U.S.A.)
2020 Apr. 14.89 UT: m1=8.3, Dia.=6′, DC=5/, … 25.4-cm L(30x) … Alexsandr Morozov (Novozybkov, Russia) [method M, Lm=6.77]
2020 Apr. 11.78 UT: m1=8.1, Dia.=5′, DC=5/, Tail=10 arcmin. in PA 150 deg., … 25.4-cm L(48x) … Alexsandr Morozov (Novozybkov, Russia) [metod M, Lm=6.49]
2020 Apr. 10.75 UT: m1=8.8, Dia.=3′, DC=5, Tail=3′ in PA: 140 deg., … 25-cm L F/4.7(70.5x) … Danil Sidorko (Korenovsk, Russia)
2020 Apr. 02.18 UT: m1=7.8, Dia.=12′, DC=1, … 20×80 B … C. S. Morris (Fillmore, CA, U.S.A.)
2020 Mar. 31.75 UT: m1=8.8, Dia.=4.5′, DC=5/, … 25.4-cm L(48x) … Alexsandr Morozov (Novozybkov, Russia) [method S, green zone, Moon 43%]
2020 Mar. 24.77 UT: m1=8.5, Dia.=4′, DC=6, Tail=7 arcmin. in PA: 160 deg., … 25.4-cm L(48x) … Alexsandr Morozov (Novozybkov, Russia) [method M, Lm=6.54]
2020 Mar. 21.44 UT: m1=8.8, Dia.=4.0′, DC=4/, … 40.0-cm L f/4.5(36x) … Seiichi Yoshida (Ibaraki, Japan)
2020 Mar. 19.18 UT: m1=8.1, Dia.=13′, DC=1, … 20×80 B … C. S. Morris (Fillmore, CA, U.S.A.)
2020 Mar. 18.81 UT: m1=8.9, Dia.=4.5′, DC=4/, … 12.0-cm R f/5(30x) … Maik Meyer (Linter Germany)
2020 Mar. 15.75 UT: m1=9.1, Dia.=5.5′, DC=5/, … 25.4-cm L (48x) … Alexsandr Morozov (Novozybkov, Russia) [method M, Lm=6.35]
2020 Mar. 14.86 UT: m1=8.7, Dia.=3′, DC=5, … 25×100 B … Juan Jose Gonzalez (Alto del Castro, Leon, Spain, 42º 55′ N, 5º 48′ W, alt. 1720 m) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2020 Mar. 14.85 UT: m1=8.9, Dia.=4′, DC=4, … 15-cm L(30x) … Carlos Labordena (Castellón, España)
2020 Mar. 13.73 UT: m1=9.1, Dia.=2.8′, DC=4/, Tail=3.5′ in PA: 120 deg., … 25-cm L F/4.7(70.5x) … Danil Sidorko (Korenovsk, Russia)
2020 Mar. 12.73 UT: m1=9.0, Dia.=3′, DC=4, Tail=4′ in PA: 120 deg., … 25-cm L F:4.7(70.5x) … Danil Sidorko (Korenovsk, Russia)
2020 Mar. 02.75 UT: m1=9.0, Dia.=4′, DC=4, … 25×100 B … Martin Lehky (Czech Republic)
2020 Feb. 28.85 UT: m1=9.0, Dia.=4′, DC=4, … 25×100 B … Martin Lehky (Czech Republic)
2020 Feb. 28.73 UT: m1=9.0, Dia.=4′, DC=5, Tail=7 arcmin. in PA: 120 deg., … 25.4-cm L(48x) … Alexsandr Morozov (Novozybkov, Russia) [method M, Lm=6.30]
2020 Feb. 25.70 UT: m1=9.2, Dia.=2′, DC=5, Tail=4′ in PA: 102 deg., … 25-cm L F:4.7(70.5x) … Danil Sidorko (Korenovsk, Russia)
2020 Feb. 23.86 UT: m1=9.1, Dia.=3.5′, DC=5, Tail=5 arcmin. in PA: 115 deg., … 25.4-cm L(30x) … Alexsandr Morozov (Novozybkov, Russia) [method M, Lm=6.41]
2020 Feb. 22.92 UT: m1:9.3, Dia.=3.5′, DC=3, … 20×80 B, Valentín Díaz (Cancarix, Albacete, España)
2020 Feb. 21.84 UT: m1=8.9, Dia.=3.5′, DC=3, … 20-cm SCT(80x) … Carlos Labordena (Castellón, España)
2020 Feb. 19.95 UT: m1=9.2, Dia.=4′, DC=4, … 20-cm SCT(77x) … Juan Jose Gonzalez (Alto del Trichero, León, Spain, 42º 46′ N, 5º 53′ W, alt. 1190 m) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.4]
2020 Feb. 19.73 UT: m1=9.4, Dia.=4′, DC=5, Tail=7 arcmin. in PA: 108 deg., … 25.4-cm L(48x) … Alexsandr Morozov (Novozybkov, Russia) [method M, Lm=6.35]
2020 Feb. 18.70 UT: m1=9.0, Dia.=2.3′, DC=5, Tail=1.5′ in PA: 110 deg., … 25-cm L F:4.7(42x, 70.5x) … Danil Sidorko (Korenovsk, Russia)
2020 Feb. 17.70 UT: m1=9.1, Dia.=2.8′, DC=5, … 25-cm L F:4.7(42x,70.5x) … Danil Sidorko (Korenovsk, Russia)
2020 Feb. 15.69 UT: m1=9.5, Dia=2.5’, DC=5, … 25.4-cm L(48x) … Alexsandr Morozov (Novozybkov, Russia) [method M, Lm=6.30]
2020 Feb. 14.83 UT: m1=9.0, Dia.=3′, DC=4, … 20-cm SCT(80x) … Carlos Labordena (Castellón, España) [no tail]
2020 Feb. 14.79 UT: m1=9.0, Dia.=4′, DC=4, … 25×100 B … Martin Lehky (Czech Republic)
2020 Feb. 13.72 UT: m1=9.3, Dia.=2.3′, DC=4/, … 25-cm L F:4.7(42x,70.5x) … Danil Sidorko (Korenovsk, Russia)
2020 Feb. 12.75 UT: m1=9.0, Dia.=4′, DC=3/, … 25×100 B … Martin Lehky (Czech Republic)
2020 Feb. 05.74 UT: m1=9.2, Dia.=3.5′, DC=3/, … 25×100 B … Martin Lehky (Czech Republic)
2020 Feb. 05.05 UT: m1=9.8, Dia.=2’, DC=4/, … 25.4-cm L(120x) … Alexsandr Morozov (Novozybkov, Russia) [method S, green zone]
2020 Feb. 03.14 UT: m1=8.9, Dia.=4′, DC=3/, … 20-cm SCT(77x) … Juan Jose Gonzalez (Cordal de Neda – Abadín, Lugo, Spain, 43º 21′ N, 7º 27′ W, alt. 780 m) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2020 Jan. 31.85 UT: m1=9.2, Dia.=3′, DC=4, Tail=4 arcmin., … 23.5-cm SCT(94x) … Carlos Labordena (Castellón, España)
2020 Jan. 31.41 UT: m1=9.0, Dia.=5.5′, DC=6, … 40.0-cm L f/4.5(36x) … Seiichi Yoshida (Ibaraki, Japan)
2020 Jan. 29.78 UT: m1=9.4, Dia.=2.5′, DC=4, Tail= 0.04 arcmin. in PA: 130 deg., … 25.4-cm L f/5(64x) … Maik Meyer (Linter, Germany)
2020 Jan. 28.78 UT: m1=9.5, Dia.=3′, DC=4, … 25.4-cm L f/5(64x) … Maik Meyer (Linter, Germany)
2020 Jan. 26.86 UT: m1=9.0, Dia.=4′, DC=4, … 8-cm B(11x) … Carlos Labordena (Castellón, España) [no tail]
2020 Jan. 26.85 UT: m1=9.1, Dia.=3.5′, DC=4, Tail=4 arcmin., … 20-cm SCT(80x) … Carlos Labordena (Castellón, España)
2020 Jan. 26.83 UT: m1=9.3, Dia.=3′, DC=5, Tail=1.5 arcmin. in AP: 110 deg., … 12.7-cm L(45x) … Valentín Díaz (La Romaneta, Alicante, España)
2020 Jan. 25.68 UT: m1=9.2, Dia.=2.5′, DC=5, Tail=3.5 arcmin. in PA: 120 deg., … 25-cm L F:5(42x,70.5x) … Danil Sidorko (Korenovsk, Russia)
2020 Jan. 23.69 UT: m1=9.9, Dia.=1.5′, DC=6, Tail=2 arcmin. in PA: 130 deg., … 25.4-cm L(120x) … Alexsandr Morozov (Novozybkov, Russia) [method M, Lm=6.54]
2020 Jan. 16.68 UT: m1=9.5, Dia.=2′, DC=3/, Tail=3.5′ in PA: 120 deg., … 25-cm L F:5(42x,70.5x) … Danil Sidorko (Korenovsk, Russia)
2020 Jan. 15.68 UT: m1=9.7, Dia.=3′, DC=6, Tail=8 arcmin. in PA: 130 deg., … 25.4-cm L(120x) … Alexsandr Morozov (Novozybkov, Russia) [method M, green zone]
2020 Jan. 14.89 UT: m1=8.8, Dia.=4′, DC=4, … 8-cm B(11x) … Carlos Labordena (Castellón, España)
2020 Jan. 14.88 UT: m1=9.0, Dia.=3.5′, DC=5, Tail=4 arcmin., … 20-cm SCT(80x) … Carlos Labordena (Castellón, España)
2020 Jan. 05.12 UT: m1=9.6, Dia.=4′, DC=4/, … 20-cm SCT(100x) … Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain, 42º 54′ N, 5º 49′ W, alt. 1490 m) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2020 Jan 03.95 UT: m1=9.8, Dia.=4′, DC=6, Tail=10 arcmin. in PA: 150 deg., … 25.4-cm L(48x) … Alexsandr Morozov (Novozybkov, Russia) [method M, green zone]
2020 Jan. 01.64 UT: m1=9.9, Dia.=1.5′, DC=5/, Tail=3.5 arcmin. in PA: 145 deg., … 25.4-cm L(120x) … Alexsandr Morozov (Novozybkov, Russia) [method M, moon 35%]

289P/Blanpain
2020 Jan. 31.80 UT: m1=[14.7, … 40.0-cm L f/4.5(257x) … Seiichi Yoshida (Ibaraki, Japan)

246P/NEAT 
2020 Apr. 24.43 UT: m1=15.0, Dia.=0.4’, DC=5/, … 40-cm L f:4(261x) … Chris Wyatt (Walcha, NSW, Australia) [Small opaque inner coma, diffuse outer coma, faint stellar pseudo-nucleus visible in good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2020 Apr. 22.43 UT: m1=14.7, Dia.=0.9’, DC=4, … 40-cm L f:4(182x) … Chris Wyatt (Walcha, NSW, Australia) [Diffuse outer coma, opaque inner coma, sometimes appears faintly stellar at centre in good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2020 Apr. 19.43 UT: m1=14.8, Dia.=0.6’, DC=5/, … 40-cm L(182x) … Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, small opaque centre, faint pseudo-nucleus visible in good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2020 Mar. 20.68 UT: m1=15.3, Dia.=0.3’, DC=5/, … 40-cm L f:4.5(182x) … Chris Wyatt (Walcha, NSW, Australia) [Very small coma, opaque inner coma, sometimes appears faintly stellar in periods of good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]

210P/Christensen
2020 May  10.35 UT: m1=12.9, Dia.=1.1’, DC=3, … 25-cm L f:5(125x) … Chris Wyatt (Walcha, NSW, Australia) [Low altitiude= 12.5°. Difficult, diffuse with slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]

114P/Wiseman-Skiff
2020 Jan. 31.43 UT: m1=14.0, Dia.=0.5′, DC=4, … 40.0-cm L f/4.5(257x) … Seiichi Yoshida (Ibaraki, Japan)

88P/Howell
2020 May  23.80 UT: m1=12.8, Dia.=1′, DC=3, … 25.4-cm L F/4.7(70.5x) … Danil Sidorko (Korenovsk, Russia)
2020 May  17.84 UT: m1=12.7, Dia.=1.5′, DC=2/, … 25.4-cm L(120x) … Alexsandr Morozov (Novozybkov, Russia)
2020 May  10.39 UT: m1=13.6, Dia.=0.8’, DC=3, … 25-cm L f:5(125x) … Chris Wyatt (Walcha, NSW, Australia) [Difficult due to proximity to a 11.2 mag star. Diffuse outer coma with slightly brighter centre. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2020 Apr. 24.42 UT: m1=14.2, Dia.=1.2’, DC=4, … 40-cm L f:4(182x) … Chris Wyatt (Walcha, NSW, Australia) [Diffuse coma, m,oderately condensed centre, sometimes appears faintly stellar at centre. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2020 Apr. 22.43 UT: m1=14.3, Dia.=1’, DC=5/, … 40-cm L f:4(182x) … Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, small inner coma with faint stellar pseudo-nucleus visible in good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2020 Apr. 19.42 UT: m1=14.8, Dia.=0.4’, DC=5/, … 40-cm L(261x) … Chris Wyatt (Walcha, NSW, Australia) [Diffuse coma, slightly brighter centre. Sometimes appears faintly stellar at centre in good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2020 Mar. 20.66 UT: m1=15.4, Dia.=0.4’, DC=3/, … 40-cm L f:4.5(182x) … Chris Wyatt (Walcha, NSW, Australia) [Small diffuse outer coma, opaque centre. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]

58P/Jackson-Neujmin
2020 May 03.35 UT: m1=10.1 (S), Dia.=3′, DC=3, … 22-cm L(160x) … Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2020 Apr. 28.79 UT: m1=10.4, Dia.=3.4’, DC=4, … 25-cm L f:5(74x) … Chris Wyatt (Walcha, NSW, Australia) [Altitude was 19.5° in twilight (8 mins after the beginning of Astro twilight) and Zodiacal light. Very diffuse, centre enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2020 Apr. 25.78 UT: m1=10.6, Dia.=2.6’, DC=3/, … 25-cm L f:5(74x) … Chris Wyatt (Walcha, NSW, Australia) [Coma shows an opaque diffuse centre fading to semi-transparent edge, enhances in Swan Band filter. Low altitude = 17.0°. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2020 Apr. 24.77 UT: m1=10.7, Dia.=2.5’, DC=3/, … 25-cm L f:5(74x) … Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slight brightening to centre. Enhances only slightly using Swan Band filter. Low altitude= 11.7° and in Zodiacal light. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]

29P/Schwassmann-Wachmann 1 
2020 Feb. 19.82 UT: m1=11.3, Dia.=1.5′, DC=4, … 20-cm SCT(133x) … Juan Jose Gonzalez (Alto del Trichero, León, Spain, 42º 46′ N, 5º 53′ W, alt. 1190 m) [Zodiacal light. In evolution after the recent outburst. Sidgwick method. Tycho-2 comparison stars. SQM: 20.4]


Dto. Publicaciones SECCION COMETAS LIADA
“Desde 1958 – Semper Observandum”
cometas.liada [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 que la 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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