Seiichi Yoshida's Diary of Comet Observations (2018)

Japanese version
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Updated on January 7, 2018

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Detailed observation data in ICQ format.

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* 2018 Jan. 6 (2 comets)

I observed 2 comets visually on Jan. 6 in Mt. Hanadate, Ibaraki, Japan.

I also tried to observe C/2017 O1 passing near by an open cluster NGC 188. But I could not see the comet due to a nearby double star of 14.5 mag stars.

C/2016 R2 ( PanSTARRS )

11.1 mag   Dia. 2.6'   DC 5   (40.0-cm reflector 75x)

Bright. Near by Hyades.

C/2017 T1 ( Heinze )

10.3 mag   Dia. 4'   DC 1   (40.0-cm reflector 36x)

Bright, but very diffuse.

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