Fwd: [CometObs] Digest Number 3605

Comet Observations Group

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Digest #3605

1

C/2017 T2, C/2018 N2, C/2018 W2, 29P, 68P, 260P - 5 August 2019. by "jjgonzalez jjgonzalez" jjgsgp

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C/2017 T2, C/2018 N2, C/2018 W2, 29P, 68P, 260P - 5 August 2019.        Tue Aug 6, 2019 10:09 am (PDT) . Posted by:      

"jjgonzalez jjgonzalez" jjgsgp

C/2017 T2 (PANSTARRS):
2019 Aug. 05.14 UT: m1=9.0, Dia.=6', DC=2, 20 cm SCT (77x).
[ Astronomical twilight. Altitude: 23°. Sidgwick method.
Tycho-2 comparison stars. SQM: 20.9.].

C/2018 N2 (ASASSN):
2019 Aug. 05.12 UT: m1=11.7, Dia.=1.5', DC=5, 20 cm SCT (133x).
[ Sidgwick method. Tycho-2 comparison stars. SQM: 21.2.].

C/2018 W2 (Africano):
2019 Aug. 05.09 UT: m1=10.2, Dia.=4', DC=2/, 20 cm SCT (77x).
[ Sidgwick method. Tycho-2 comparison stars. SQM: 21.3.].

29P/Schwassmann-Wachmann:
2019 Aug. 05.00 UT: m1=12.3, Dia.=1.5', DC=3, 20 cm SCT (133x).
[ In outburst. Brighter inner coma diameter 1.5', providing
m=12.3.
Faint and diffuse outer coma diameter 4', remnant of previous
outbursts.
Central condensation, m2=14.2 (AQ). Nearby field stars checked in
DSS.
Mountain location, very clear sky. Sidgwick method. APASS
comparison stars.
SQM: 21.4.].

68P/Klemola:
2019 Aug. 04.96 UT: m1=11.7, Dia.=2', DC=3, 20 cm SCT (100x).
[ Brighter inner coma diameter 2', providing m=11.7.
Faint and diffuse outer coma diameter 5'. Sidgwick method.
Tycho-2 comparison stars. SQM: 21.3.].

260P/McNaught:
2019 Aug. 05.11 UT: m1=11.8, Dia.=1.3', DC=4, 20 cm SCT (133x).
[ Sidgwick method. APASS comparison stars. SQM: 21.4.].


( Alto del Castro, Leon, Spain, 42º 55' N, 5º 48' W, alt.
1720 m;
SQM 21.6 at zenith ).

J. J. Gonzalez Suarez

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 K.A.G (Kessingland Astronomy Group) and Navigator (Astrogator) of the Stars (Fieldwork)