[CometObs] Digest Number 3601

C/2017 T2, C/2018 N2, C/2018 W2, 68P, 260P - 24 + 30 July 2019.

Wed Jul 31, 2019 4:39 am (PDT) . Posted by:

"jjgonzalez jjgonzalez" jjgsgp

C/2017 T2 (PANSTARRS):
2019 July 30.15 UT: m1=8.7, Dia.=7', DC=2, 20 cm SCT (77x).
[ Astronomical twilight. Altitude: 22°. Sidgwick method.
Tycho-2 comparison stars. SQM: 21.1.].

C/2018 N2 (ASASSN):
2019 July 30.14 UT: m1=11.9, Dia.=1.2', DC=5, 20 cm SCT (133x).
[ Sidgwick method. APASS comparison stars. SQM: 21.4.].

C/2018 W2 (Africano):
- 2019 July 24.94 UT: m1=10.4, Dia.=4', DC=2/, 20 cm SCT (100x).
[ Sidgwick method. Tycho-2 comparison stars. SQM: 21.3.].
- 2019 July 30.03 UT: m1=10.3, Dia.=4', DC=2/, 20 cm SCT (77x).
[ Sidgwick method. Tycho-2 comparison stars. SQM: 21.3.].

68P/Klemola:
2019 July 30.01 UT: m1=11.8, Dia.=2', DC=4, 20 cm SCT (100x).
[ Brighter inner coma diameter 2′, providing m=11.8.
Faint and diffuse outer coma diameter 4′, providing m=10.5.
This outer coma was also observed on July 24.99 UT.
Nearby field stars checked in DSS. Mountain location, very clear sky.
Sidgwick method. Tycho-2 comparison stars. SQM: 21.2.].

260P/McNaught:
2019 July 30.04 UT: m1=11.6, Dia.=1.3', DC=4, 20 cm SCT (100x).
[ Sidgwick method. APASS comparison stars. SQM: 21.4.].

( July 24: SQM 21.4 at zenith ).

( July 30: SQM 21.5 at zenith ).

( Alto de la Camperona, Leon, Spain; Alt. 1600 m, 42º 51' N, 5º 12' W ).

J. J. Gonzalez Suarez


Good Clear Skies
--
Astrocomet
--
Colin James Watling
--
Various Voluntary work-Litter Picking for Parish Council (Daytime) and
also a friend of Kessingland Beach (Watchman)
--
Real Astronomer and head of the Comet section for K.A.G (Kessingland
Astronomy Group) and Navigator (Astrogator) of the Stars (Fieldwork)