Comet Wirtanen on Dec 29, 2018


1600mm prime focus

Date & Time: Dec 29 2018, from 20:38 to 21:05 JST(+0900)
Composed 10 shots with 3 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
with BaaderPlanetarium Moon&Skyglow filter
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(4080×4080)
Device Size...20×20mm
Sensitivity...ISO4000, White Balance...Daylight



530mm prime focus

Date & Time: Dec 29 2018, from 19:54 to 20:22 JST(+0900)
Composed 10 shots with 3 minutes exposed
Optical: TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
with IDAS LPS-D1 Light-pollution suppression filter
Auto-guided with TAKAHASHI JP Equatorial & SBIG STV
Digital Camera: Canon EOS 6D (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5472×3648)
Device Size...24×16mm, Sensitivity...ISO1600


The comet Wirtanen had rapidly gone up northward between winter's constellations during Dec 2018, positioned at northern region of Lynx, around the zenith in evening of the end of 2018. The coma in that day has a brightness of 7th magnitude and a visual diameter of about 40 arc minutes. In the second image, we can recognize that the distribution of coma is a bit spread in southwest direction.
  1st image: View angle: 0.70×0.70°
  2nd image: View angle: 2.41×1.61°


Wirtanen on Jan 27, 2019
Spectrum of Wirtanen on Dec 15, 2018

Copyright(c) 2018 by Naoyuki Kurita, All rights reserved.
To top page To Comets&Meteors index