2015V2 Johnson on May 20, 2017

Comet 2015V2 Johnson on May 20, 2017

Date & Time:	May 20 2017, from 20:25 to 21:06 JST(+0900)
	Composed 14 shots with 3min. exposed
Optical:	VIXEN 20cm(7.9") VISAC with a conversion lens (f=1278mm, F6.4)
	with Baader Planetarium Moon&Skyglow filter
	Auto-guided with TAKAHASHI EM-200 Equatorial
Digital Camera:	Canon EOS 6D (Remodeled)
Location:	Furudono town, Fukushima pref.

Camera Settings:	Recording format...14bit CCD-RAW, converted to 16bit TIFF(5472×3648)
	Device Size...35×24mm, Sensitivity...ISO6400

The comet 2015V2 Johnson in that day has positioned at about 1.5 degrees west from delta Boo. The brightness of coma can be estimated about 7th magnitude, you can detect an dust tail and a dimmed ion tail stretched in northwest and south directions, respectively.
The image has been cropped with an equivalent f=1600mm. (View angle: 1.28×0.85°)

Comet Honda-Mrkos-Pajdusakova on Dec 24, 2016

Comet 2015V2 Johnson on Apr 28, 2017

		Copyright(c) 2017 by Naoyuki Kurita, All rights reserved.
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