Comet Wirtanen on Jan 27, 2019


Date & Time: Jan 27 2019, from 19:07 to 19:27 JST(+0900)
Composed 9 shots with 2 minutes exposed
Optical: VIXEN 20cm(7.9") VISAC with conversion lens (f=1278mm, F6.4)
with BaaderPlanetarium Moon&Skyglow filter
Auto-guided with TAKAHASHI EM-200 Equatorial
Digital Camera: Nikon D810A
Location: Hitachi-oota city, Ibaraki pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(7360×4912)
Device Size...FX format (36×24mm)
Sensitivity...ISO6400, White Balance...Daylight


The comet Wirtanen in Jan 2019 has moved northward to the western region of Ursa Major; a 7th or 8th magnitude coma can be observed. Although the size of coma becomes fairly smaller compared with that in last month, I could detect a 15 arc minutes-coma in diameter clearly with a binocular.
  The image has cropped with equivalent f=1600mm (View angle: 1.28×0.85°)


Wirtanen on Feb 1, 2019
Wirtanen on Dec 29, 2018

Copyright(c) 2019 by Naoyuki Kurita, All rights reserved.
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