Comet 2025R2 SWAN on Nov 1, 2025

Click on image to enlarge

Date & Time: Nov 1 2025, from 18:28 to 18:56 JST(+0900)
Composed 15 shots with 2 minutes exposed
Optical: TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
with IDAS LPS-D1 Light-pollution suppression filter
Auto-guided with TAKAHASHI JP Equatorial & SBIG STV
CMOS Camera: ZWO ASI2600MC Pro (Cooled temp.: -15°C)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording format...16bit FITS, converted to 16bit TIFF(6248×4176)
Device Size...23.5×15.7mm, Gain...100


On this night, comet 2025R2 SWAN was located 2.2 degrees southwest of α Aquarii in the southern sky before midnight, showing a blue coma of 8th magnitude. Due to the nearby 11-day-aged Moon, its tail extending eastward was barely visible. Although the comet will become easier to observe in the coming days, it is expected to fade rapidly.
This image is cropped to an effective focal length of 700 mm.
View angle: 1.9×1.3°


2025K1 ATLAS on early morning of Nov 3, 2025
2025R2 SWAN on Oct 17, 2025

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