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Digest #3315
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Sun Sep 17, 2017 8:56 pm (PDT) . Posted by:
"Bomber2 Panther" outbackmanyep
Comet Observations 15th September 2017
C/2015 V2 Johnson
2017 Sep 15.41 UT; m1= 11.0: ; Dia= 2.4'; DC= 3; 25cm L, f:5 (x39) [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
71P/ Clark
2017 Sep 15.42 UT; m1= 12.5; Dia= 1.2'; DC= 2/3; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Coma very diffuse.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ
29P/ Schwassmann-Wachmann 1
2017 Sep 15.44 UT; m1= 11.7; Dia= 2.5'; DC= 3; 25cm L, f:5 (x39) [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
240P/ NEAT
2017 Sep 15.46 UT; m1= 14.0; Dia= 1'; DC= 3; 25cm L, f:5 (x83) [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
C/2015 V2 Johnson
2017 Sep 15.41 UT; m1= 11.0: ; Dia= 2.4'; DC= 3; 25cm L, f:5 (x39) [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
71P/ Clark
2017 Sep 15.42 UT; m1= 12.5; Dia= 1.2'; DC= 2/3; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Coma very diffuse.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ
29P/ Schwassmann-Wachmann 1
2017 Sep 15.44 UT; m1= 11.7; Dia= 2.5'; DC= 3; 25cm L, f:5 (x39) [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
240P/ NEAT
2017 Sep 15.46 UT; m1= 14.0; Dia= 1'; DC= 3; 25cm L, f:5 (x83) [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
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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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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