Comet 2015V2 Johnson on Feb 3, 2017


Date & Time: Feb 3 2017, from 25:11 to 25:40 JST(+0900)
Composed 10 shots with 3min. exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with a conversion lens (f=1600mm, F6.3)
Auto-guided with Meade LX200 Equatorial & Pictor 201XT
Digital Camera: Nikon D810A
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording format...14bit CCD-RAW, converted to 16bit TIFF(4800×3200)
Device Size...DX format (24×16mm)
Sensitivity...ISO6400, White Balance...Daylight




The comet 2015V2 Johnson in that day has positioned at north east region of Bootes, a 10th magnitude coma and a dust tail stretched in northwestt direction could be observed. The comet has become brighter than previous observation, you can detect an indistinct greenish ionized composition surrounding the coma.
  (View angle: 0.84×0.56°)





Comet 2015V2 Johnson on Apr 15, 2017

Comet 2015V2 Johnson on early morning of Dec 24, 2016


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