Comet 2025K1 ATLAS on early morning of Nov 3, 2024


Date & Time: Nov 2 2025, from 28:03 to 28:09 JST(+0900)
Composed 3 shots with 3 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


On this day, comet 2025K1 ATLAS was located low in the eastern sky just before the start of dawn, about 8 degrees SSW of β Leonis (Denebola). A 10th-magnitude coma and a dust tail about 15 arcminutes long extending toward the northeast were observed. After reaching a maximum brightness of magnitude 8 in early Oct 2025-when it was unobservable from Earth-the comet is now rapidly fading.
View angle: 0.70×0.70°


2025R2 SWAN on Nov 1, 2025

Copyright(c) 2025 by Naoyuki Kurita, All rights reserved.
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