Fwd: [CometObs] Digest Number 3610

Comet Observations Group

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Digest #3610

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C/2018 W2, 29P, 68P. by "jjgonzalez jjgonzalez" jjgsgp

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C/2018 W2, 29P, 68P.

Sun Aug 25, 2019 12:52 am (PDT) . Posted by:

"jjgonzalez jjgonzalez" jjgsgp

C/2018 W2 (Africano):
2019 Aug. 22.90 UT: m1=9.8, Dia.=5', DC=2, 20 cm SCT (100x).
[ Several stars in coma, the brightest being mag 11.1 (TK).
Sidgwick method. Tycho-2 comparison stars. SQM: 20.9.].

29P/Schwassmann-Wachmann:
2019 Aug. 22.95 UT: m1=11.5, Dia.=3', DC=1/, 20 cm SCT (167x).
[ Faint and diffuse outer coma diameter 3', (remnant of previous
outbursts), providing m=11.5. Nearby field stars checked in DSS.
Mountain location, very clear sky. Sidgwick method.
APASS comparison stars. SQM: 21.2.].

68P/Klemola:
2019 Aug. 22.92 UT: m1=11.3, Dia.=2', DC=3, 20 cm SCT (133x).
[ Brighter inner coma diameter 2', providing m=11.3.
In 20 cm SCT (77x): Faint and diffuse outer coma diameter 8',
providing m=10.0:. Sidgwick method. Tycho-2 comparison stars.
SQM: 21.1.].

( Alto del Castro, Leon, Spain, 42º 55' N, 5º 48' W, alt. 1720 m;
SQM 21.3 at zenith ).

J. J. Gonzalez Suarez

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