Últimas observaciones visuales (m1) recibidas en formato Morris, que desde 2004 recibimos permanentemente en la Sección Cometas de la LIADA por medio del e-mail: cometas.liada@gmail.com, a quienes nuestra profunda gratitud.
C/2020 T2 (Palomar)
2021 July 05.43 UT: m1=10.5, Dia=4.2’, DC=5/, … 40-cm L f:4 (59x) … Chris Wyatt (Walcha, NSW, Australia) [Inner coma dims in Swan Band while outer coma enhances slightly. Hint of faint tail to the East approximately. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2021 July 04.96 UT: m1=9.8, Dia.=6′, DC=3/, … 20 cm SCT (77x) … Juan Jose Gonzalez (La Camperona, Leon, Spain, 42º 51′ N, 5º 12′ W, alt. 1530 m) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.3]
C/2020 J1 (SONEAR)
2021 July 05.50 UT: m1=13.9, Dia=0.6’, DC=6, … 40-cm L f:4 (182x) … Chris Wyatt (Walcha, NSW, Australia) [Diffuse, opaque centre, faint stellar pseudo-nucleus visible in good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2021 July 04.95 UT: m1=11.2, Dia.=5′, DC=2/, … 20 cm SCT (77x) … Juan Jose Gonzalez (La Camperona, Leon, Spain, 42º 51′ N, 5º 12′ W, alt. 1530 m) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
C/2020 F5 (MASTER)
2021 July 06.72 UT: m1=14.9, Dia=0.5’, DC=6, … 40-cm L f:4 (182x) … Chris Wyatt (Walcha, NSW, Australia)[Diffuse, stellar pseudo-nucleus visible in good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
C/2019 T4 (ATLAS)
2021 July 05.42 UT: m1=14.4, Dia=0.5’, DC=4/, … 40-cm L f:4 (182x) … Chris Wyatt (Walcha, NSW, Australia) [Low altitude= 11.5°. Diffuse, opaque centre. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
C/2019 L3 (ATLAS)
2021 July 06.95 UT: m1=11.9, Dia.=1.4′, DC=3/ …25.4-cm L (120x) … Alexsandr Morozov (Novozybkov, Russia)
C/2019 F1 (ATLAS-Africano)
2021 July 06.70 UT: m1=14.8, Dia=0.5’, DC=4, … 40-cm L f:4 (261x) … Chris Wyatt (Walcha, NSW, Australia) [Diffuse, opaque centre. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2021 July 05.47 UT: m1=14.9, Dia=0.3’, DC=4, … 40-cm L f:4 (261x) … Chris Wyatt (Walcha, NSW, Australia) [Diffuse, opaque centre. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
C/2018 U1 (Lemmon)
2021 July 05.48 UT: m1=15.0, Dia=0.3’, DC=5/, … 40-cm L f:4 (261x) … Chris Wyatt (Walcha, NSW, Australia) [Diffuse, opaque centre. Faint stellar pseudo-nucleus visible in good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
C/2017 K2 (PanSTARRS)
2021 July 06.92 UT: m1=12.5, Dia.=1.5′, DC=4 …25.4-cm L (120x) … Alexsandr Morozov (Novozybkov, Russia)
2021 July 05.49 UT: m1=13.5, Dia=1’, DC=5/6, … 40-cm L f:4 (182x) … Chris Wyatt (Walcha, NSW, Australia) [Opaque centre, semi-transparent outer coma. Faint stellar pseudo-nucleus visible in good seeing. Altitude= 16.5°. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2021 July 04.98 UT: m1=12.3, Dia.=1.5′, DC=4, … 20 cm SCT (133x) … Juan Jose Gonzalez (La Camperona, Leon, Spain, 42º 51′ N, 5º 12′ W, alt. 1530 m) [Sidgwick method. APASS comparison stars. SQM: 21.4]
246P/NEAT
2021 July 06.70 UT: m1=13.8, Dia=0.8’, DC=4/, … 40-cm L f:4 (182x) … Chris Wyatt (Walcha, NSW, Australia) [Diffuse, opaque centre. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
2021 July 05.46 UT: m1=14.0, Dia=0.6’, DC=5, … 40-cm L f:4 (182x) … Chris Wyatt (Walcha, NSW, Australia) [Difficult due to proximity to background stars. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
67P/Churyumov-Gerasimenko
2021 July 06.73 UT: m1=15.1, Dia=0.3’, DC=6, … 40-cm L f:4 (261x) … Chris Wyatt (Walcha, NSW, Australia) [Diffuse outer coma, stellar pseudo-nucleus visible in good seeing. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
15P/Finlay
2021 July 06.76 UT: m1=11.1, Dia=2.9’, DC=4, … 40-cm L f:4 (59x) … Chris Wyatt (Walcha, NSW, Australia) [Enhances slightly in Swan Band filter. Opaque inner coma, semi-transparent outer coma. Altitude= 18.6°. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
10P/Tempel 2
2021 July 06.75 UT: m1=13.5, Dia=1’, DC=3/4, … 40-cm L f:4 (182x) … Chris Wyatt (Walcha, NSW, Australia) [Very diffuse, slight brightening to centre. Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ]
7P/Pons–Winnecke
2021 July 06.71 UT: m1=11.8, Dia=4.8’, DC=6, … 40-cm L f:4 (59x) … Chris Wyatt (Walcha, NSW, Australia) [Dims slightly in Swan Band filter. Outer coma extended, slight interference from stars on NE edge of coma. Comparison stars checked using APASS data in Guide 9.0, Method= M, Cat= AQ]
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