Comet 2019Y4 ATLAS on Mar 20, 2020


Date & Time: Mar 20 2020, from 20:24 to 21:01 JST(+0900)
Composed 10 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


Click on image to enlarge

Comet C/2019Y4 ATLAS & Bode's Galaxies (M81, M82)

Date & Time: Mar 20 2020, from 20:52 to 22:08 JST(+0900)
Composed 20 shots with 4 minutes exposed
Optical: BORG 67FL with conversion lens (f=324mm, F4.8)
with BaaderPlanetarium Moon&Skyglow filter
Auto-guided with TAKAHASHI EM-200 Equatorial
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)
Sensitivity...ISO3200


The comet C/2019Y4 ATLAS in that day for my first observation has positioned at 3.7 degrees WSW of the famous Bode's Galaxies (M81 & M82) in western Ursa Major. The brightness of coma has already reached as 8th class magnitude; the 1st image in this page shows you a 10 arc minutes-long thin and dimmed dust tail stretched in southeast direction. The comet will brighten drastically from now on, it's expected that we can appreciate as a rare naked-eye comet in May 2020.
(Postscript on Apr 11, 2020)
It was reported that the coma of the comet collapsed on Apr 6, 2020 and stopped its brightening. Unfortunately we have lost a rare opportunity to appreciate the comet ATLAS as a naked eye-comet in May 2020.
  1st image: View angle: 0.70×0.70°
  2nd image: View angle: 6.3×4.2°


2019Y4 ATLAS on Apr 10, 2020
2017T2 PanSTARRS on Jun 9, 2020

Copyright(c) 2020 by Naoyuki Kurita, All rights reserved.
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