Comet 3I ATLAS on Jan 16, 2026


Date & Time: Jan 16 2026, from 22:07 to 22:52 JST(+0900)
Composed 12 shots with 4 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
with IDAS LPS-P1 Light-pollution suppression 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


This image shows interstellar-comet 3I/ATLAS as it is moving away from the solar system. The coma has faded to about 13th magnitude, and on this date it was located 3.5 degrees south of the Beehive Cluster (The Praesepe, M44) in Cancer, making it observable for almost the entire night. As in the previous observation, a short tail extending toward the east can also be seen.
View angle: 0.70×0.70°


24P Schaumasse on Dec 26, 2025
3I ATLAS on Dec 28, 2025

Copyright(c) 2026 by Naoyuki Kurita, All rights reserved.
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