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Digest #3293
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Wed Jul 26, 2017 4:19 am (PDT) . Posted by:
"Bomber2 Panther" outbackmanyep
Comet Observations 25th July 2017
C/2015 V2 Johnson
2017 Jul 25.42 UT; m1= 9.6; Dia= 4'; DC= 6; 25cm L, f:5 (x39) [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
71P/ Clark
2017 Jul 25.43 UT; m1= 10.9; Dia= 3.2'; DC= 3/4; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse, moderately condensed centre.
Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ
C/2015 VL62 Lemmon-Yeung-PanSTARRS
2017 Jul 25.76 UT; m1= 13.6; Dia= 0.9'; DC= 3; 25cm L, f:5 (x83) [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
29P/ Schwassmann - Wachmann
2017 Jul 25.76 UT; m1= 13.2; Dia= 1.2'; DC= 2; 25cm L, f:5 (x83) [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
C/2017 O1 (ASASSN1)
2017 Jul 25.77 UT; m1= 9.9; Dia= 9.6'; DC= 3; 25cm L, f:5 (x39) [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
C/2015 ER61 PanSTARRS
2017 Jul 25.78 UT; m1= 11.2; Dia= 3'; DC= 3/4; 25cm L, f:5 (x39) [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
217P/ LINEAR
2017 Jul 25.79 UT; m1= 12.2; Dia= 1.4'; DC= 5/6; 25cm L, f:5 (x83) [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
C/2015 V2 Johnson
2017 Jul 25.42 UT; m1= 9.6; Dia= 4'; DC= 6; 25cm L, f:5 (x39) [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
71P/ Clark
2017 Jul 25.43 UT; m1= 10.9; Dia= 3.2'; DC= 3/4; 25cm L, f:5 (x39) [Chris Wyatt, Walcha, NSW, Australia]
Coma diffuse, moderately condensed centre.
Comparison stars checked using APASS data in Guide 9.0; Method= M; Cat= AQ
C/2015 VL62 Lemmon-Yeung-PanSTARRS
2017 Jul 25.76 UT; m1= 13.6; Dia= 0.9'; DC= 3; 25cm L, f:5 (x83) [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
29P/ Schwassmann - Wachmann
2017 Jul 25.76 UT; m1= 13.2; Dia= 1.2'; DC= 2; 25cm L, f:5 (x83) [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
C/2017 O1 (ASASSN1)
2017 Jul 25.77 UT; m1= 9.9; Dia= 9.6'; DC= 3; 25cm L, f:5 (x39) [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
C/2015 ER61 PanSTARRS
2017 Jul 25.78 UT; m1= 11.2; Dia= 3'; DC= 3/4; 25cm L, f:5 (x39) [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
217P/ LINEAR
2017 Jul 25.79 UT; m1= 12.2; Dia= 1.4'; DC= 5/6; 25cm L, f:5 (x83) [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
Good Clear Skies
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Astrocomet
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Colin James Watling
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Various Voluntary work-Litter Picking for Parish Council (Daytime) and also a friend of Kessingland Beach (Watchman)
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Elev: 38ft/11.5824 Meters above sea level
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Real Astronomer and head of the Comet section for LYRA (Lowestoft and Great Yarmouth Regional Astronomers) also head of K.A.G (Kessingland Astronomy Group) and Navigator (Astrogator) of the Stars (Fieldwork)
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Lyra Main Website: http://www.lyra-astro.co.uk/
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