Fwd: [CometObs] Digest Number 3574

Comet Observations Group

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Digest #3574

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C/2017 T2, C/2018 Y1, 46P, 123P. by jjgsgp

Message

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C/2017 T2, C/2018 Y1, 46P, 123P.

Sat Mar 23, 2019 11:36 pm (PDT) . Posted by:

jjgsgp

C/2017 T2 (PANSTARRS):
2019 Mar. 23.84 UT: m1=10.7, Dia.=3.5', DC=2/, 20 cm SCT (77x).
[ Brighter than expected. Possible previous outburst.
Brighter inner coma diameter 3.5', providing m=10.7.
Faint and diffuse outer coma diameter 5.5', providing m=9.6.
Nearby field stars checked in DSS. Limiting stellar magnitude
fainter than 13.7 (AQ). Altitude: 18°. Zodiacal light.
Mountain location, very clear sky. Sidgwick method.
Tycho-2 comparison stars. SQM: 20.8.].

C/2018 Y1 (Iwamoto):
2019 Mar. 23.86 UT: m1=9.3, Dia.=5', DC=3, 20 cm SCT (77x).
[ Sidgwick method. Tycho-2 comparison stars. SQM: 21.1.].

46P/Wirtanen:
2019 Mar. 23.87 UT: m1=10.8, Dia.=4', DC=2, 20 cm SCT (100x).
[ Sidgwick method. Tycho-2 comparison stars. SQM: 21.5.].

123P/West-Hartley:
2019 Mar. 23.90 UT: m1=11.5, Dia.=2.5', DC=3, 20 cm SCT (100x).
[ Sidgwick method. APASS comparison stars. SQM: 21.5.].

( Alto del Castro, Leon, Spain, 42º 55' N, 5º 48' W, alt. 1720 m;
SQM : 21.5 at zenit ).

J. J. Gonzalez Suarez

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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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Profile: http://www.google.com/profiles/astrocomera

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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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