Comet Stephan-Oterma on Dec 8, 2018

Date & Time: Dec 8 2018, from 24:10 to 24:31 JST(+0900)
Composed 8 shots with 3 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
withIDAS LPS-P1 Light-pollution suppression 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

The comet 38P Stephan-Oterma in that day was positioned at northwest region of Cancer, I could found it out at 9.5 degrees east from Castor in Gemini. The comet has almost same the features with that in last month; you can detect a 9th magnitude coma and a tail in west direction clearly.
  View angle: 0.70×0.70°

Wirtanen on Nov 3, 2018

Stephan-Oterma on Nov 10, 2018

Copyright(c) 2018 by Naoyuki Kurita, All rights reserved.
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