Comet Wirtanen on Feb 23, 2019


Date & Time: Feb 23 2019, from 20:22 to 20:40 JST(+0900)
Composed 10 shots with 2 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...ISO4000, White Balance...Daylight


This image shows you the comet Wirtanen withdrawing from the Earth and moving southward in western Ursa Major. In that day the comet had a coma brightness of 10th magnitude; I could not detect it through telecsope-aided eyes. This image shows that the coma is spread in southern direction, a diameter has shrunk to at most 3 arc minutes.
  The image has cropped with equivalent f=1600mm (View angle: 1.28×0.85°)


Iwamoto on early morning of Dec 30, 2018
Wirtanen on Feb 1, 2019

Copyright(c) 2019 by Naoyuki Kurita, All rights reserved.
To top page To Comets&Meteors index