Comet Iwamoto on early morning of Dec 30, 2018


Date & Time: Dec 29 2018, from 28:26 to 28:36 JST(+0900)
Composed 10 shots with 1 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


I have captured a dimmed comet 2018Y1 Iwamoto in lower dawn skies 11 days after of its discovery. The comet Iwamoto has positioned in eastern region of Hydra and has a visual brightness of at most 12th magnitude yet. It is predited that the comet will brighten up to 7th magnitude in Feb 2019. In that day, I could hardly detect detailed structures of the comet like the presence or absence of tails due to the glittering moon with an age of 22.5.
  View angle: 0.70×0.70°


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

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