Comet 2025R2 SWAN on Nov 22, 2025


Date & Time: Nov 22 2025, from 22:25 to 22:42 JST(+0900)
Composed 5 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


On this night, comet 2025R2 Swan was located in the southern sky before midnight, 3.3 degrees west of ω Piscium, which forms the western fish of the constellation Pisces. A diffuse, 11th-magnitude bluish coma was observed, with no detectable tail. Although the comet will remain in favorable observing conditions for a while, it is expected to fade rapidly.
View angle: 0.70×0.70°


2025K1 ATLAS on early mornning of Nov 3, 2025
2025R2 SWAN on Nov 1, 2025

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