Fwd: [CometObs] Digest Number 3330

Comet Observations Group

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Digest #3330

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24P, 29P, 62P (significantly brighter than expected), C/2017 O1. by "Juan Jose Gonzalez" jjgsgp

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24P, 29P, 62P (significantly brighter than expected), C/2017 O1.

Mon Oct 23, 2017 1:49 pm (PDT) . Posted by:

"Juan Jose Gonzalez" jjgsgp

24P/Schaumasse:
2017 Oct. 23.20 UT: m1=10.6, Dia.=4', DC=3, 20 cm SCT (100x).
[ Altitude: 33 deg. Zodiacal light. Sidgwick method.
Tycho-2 comparison stars. SQM : 20.9.].

29P/Schwassmann-Wachmann:
2017 Oct. 22.88 UT: m1=11.5, Dia.=2', DC=2/, 20 cm SCT (100x).
[ Brighter inner coma diameter : 2', providing m=11.5 (AQ).
Faint and diffuse outer coma diameter : 4', providing m=10.3: (TK),
remnant of previous outbursts. Sidgwick method. Field stars checked
in DSS. Altitude: 29 deg. SQM : 21.0.].

62P/Tsuchinshan:
2017 Oct. 23.22 UT: m1=10.2, Dia.=5', DC=2, 20 cm SCT (100x).
[ Significantly brighter than expected. Altitude: 46 deg.
Zodiacal light. Sidgwick method. Tycho-2 comparison stars. SQM : 20.9.].

C/2017 O1 (ASASSN):
2017 Oct. 22.90 UT: m1=8.3, Dia.=8', DC=2/, 25x100B.
[ Sidgwick method. Tycho-2 comparison stars. SQM : 21.2.].

( Alto del Castro - Aralla, Leon, Spain; Alt. 1720 m, 42º 54' N, 5º 48' W;
Mountain location, very clear sky. SQM 21.2 at zenith.).

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ICQ Format :

24 2017 10 23.20 S 10.6 TK 20.3T10 100 4 3 ICQ XX GON05

29 2017 10 22.88 S 11.5 AQ 20.3T10 100 2 2/ ICQ
XX GON05

62 2017 10 23.22 S 10.2 TK 20.3T10 100 5 2 ICQ XX GON05

2017O1 2017 10 22.90 S 8.3 TK 10.0B 25 8 2/ ICQ XX
GON05

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J. J. Gonzalez

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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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