Fwd: [CometObs] Digest Number 3319

Comet Observations Group

3 Messages

Digest #3319

1.1

OBS-V by "Castell.Nova" szasa0

2

Comet Observations 21st September 2017 by "Bomber2 Panther" outbackmanyep

3

Comet Observations 22nd September 2017 by "Bomber2 Panther" outbackmanyep

Messages

1.1

OBS-V

Sat Sep 23, 2017 11:44 am (PDT) . Posted by:

"Castell.Nova" szasa0

Hello to the Group,

some visual observation from last night. Unfortunately before midnight some local clouds appeared and ceased observation.

29P/Schwassmann-Wachmann
2017 Sep 22.86 UT: m1=13.7, Dia.=0.9', DC=1, 60 cm reflector (305x)
Very diffuse comet.

C/2015 O1 (PanSTARRS)
2017 Sep 22.79 UT: m1=14.2, Dia.=0.3', DC=5, 60 cm reflector (244x)

C/2016 M1 (PanSTARRS)

2017 Sep 22.82 UT: m1=14.5, Dia.=0.5', DC=5, 60 cm reflector (305x)

C/2016 N4 (MASTER)
2017 Sep 22.84 UT: m1=15.7, Dia.=0.4', DC=2, 60 cm reflector (305x)
A 16.5 mag starlike nucleus is seen. Motion was checked during 20 minutes.

C/2016 N6 (PanSTARRS)

2017 Sep 22.80 UT: m1=13.7, Dia.=0.7', DC=3, 60 cm reflector (244x)

Sandor Szabo

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2

Comet Observations 21st September 2017

Sun Sep 24, 2017 3:53 am (PDT) . Posted by:

"Bomber2 Panther" outbackmanyep

240P/ NEAT
2017 Sep 21.72 UT; m1= 14.2; Dia= 0.7'; DC= 3; 25cm L, f:5 (x83) [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

C/2017 O1 ASASSN
2017 Sep 21.73 UT; m1= 9.5; Dia= 11.4'; DC= 3/4; 25cm L, f:5 (x39) [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

C/2016 R2 PanSTARRS
2017 Sep 21.75 UT; m1= 13.8; Dia= 0.9'; DC= 3; 25cm L, f:5 (x83) [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

217P/ LINEAR
2017 Sep 21.76 UT; m1= 13.9; Dia= 0.8'; DC= 3; 25cm L, f:5 (x166) [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

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3

Comet Observations 22nd September 2017

Sun Sep 24, 2017 3:55 am (PDT) . Posted by:

"Bomber2 Panther" outbackmanyep

Comet Observations 22nd September 2017

71P/ Clark
2017 Sep 22.45 UT; m1= 12.2; Dia= 1.9'; DC= 3; 25cm L, f:5 (x83) [Chris Wyatt, Walcha, NSW, Australia]
Busy star field, difficult.
Comparison stars checked using APASS data in Guide 9.0; Method= S; Cat= AQ

29P/ Schwassmann-Wachmann 1
2017 Sep 22.46 UT; m1= 11.9; Dia= 3'; DC= 2/3; 25cm L, f:5 (x39) [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

C/2015 V2 Johnson
2017 Sep 22.47 UT; m1= 10.9; Dia= 3.9'; DC= 2; 25cm L, f:5 (x39) [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

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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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