Comet Borisov on early morning of Dec 28, 2019


Date & Time: Dec 27 2019, from 28:43 to 29:16 JST(+0900)
Composed 11 shots with 4 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 & Lacerta M-GEN
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 interstellar comet Borisov has moved south to the Hydra in dawn lower southern skies. The coma's brightness has about 15th magnitude as with last month. However the haze in lower skies made hard to detect a dimmed dust tail stretched in northwest direction. The comet Borisov will move southward continuously, become unobservable at northern hemisphere in Jan 2020.
  View angle: 0.70×0.70°


2017T2 PanSTARRS on Oct 26, 2019
Borisov on early morning of Nov 30, 2019

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