Comet Iwamoto on Feb 1 & 2, 2019


Date & Time: Feb 1 2019, from 26:07 to 26:38 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: Canon EOS 6D (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(3056×3056)
Device Size...20×20mm, Sensitivity...ISO4000



Date & Time: Feb 2 2019, from 26:17 to 26:44 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: Canon EOS 6D (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(3056×3056)
Device Size...20×20mm, Sensitivity...ISO4000


The comet 2018Y1 Iwamoto on Feb 2, a month later from my previous observation has positioned in dawn south skies, about 8.5 deg. west from Spica. The moving rate of comet has fairly increased toward its maximum approach to the Earth in the middle of Feb 2019. I detected a coma brightness of 8th magnitude and an apparent diameter in excess of 15 arc minutes. Although it's indistinct yet, the comet seems to stretch a dust tail in northwest direction. Comparing two shots in 24-hours apart, the coma brightness and size got larger obviously.
  View angle: 0.70×0.70°


Iwamoto on Feb 16, 2019
Iwamoto on early morning of Dec 30, 2018

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