Comet Iwamoto on Feb 16, 2019


Date & Time: Feb 16 2019, from 21:15 to 21:36 JST(+0900)
Composed 21 shots with 1 minute 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: Hiraiso, Hitachi-naka city, Ibaraki pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(7360×4912)
Device Size...FX format (36×24mm)
Sensitivity...ISO3200, White Balance...Daylight


This image shows you a comet C/2018Y1 Iwamoto just passed the maximum approach to the Earth. The comet has positioned in northern Cancer, at 8 degrees east of Pollux in the evening zenith skies. In that day, an 11.7-aged moonlight obscured the dimmed distribution of ionized composition. However I could detect a 6-magnitude coma clearly. The direction of a dust tail has inverted to southeast compared with that on two weeks ago. The comet Iwamoto will move westward and get dimmer rapidly from now on.
  The image has cropped with equivalent f=1600mm (View angle: 1.28×0.85°)


Iwamoto on Feb 23, 2019
Iwamoto on Feb 1 & 2, 2019

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