Comet 2025A6 Lemmon on Nov 1, 2025

Click on image to enlarge

Date & Time: Nov 1 2025, from 18:01 to 18:19 JST(+0900)
Composed 10 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


The comet 2025 A6 Lemmon was located in the western part of Ophiuchus, low in the western sky at dusk on this day. The bright star at the lower left of the image is Lambda Ophiuchi (3.7th magnitude). The comet's coma had an estimated brightness of about 4th magnitude, and splendid dust and ion tails extended toward the northeast. The dust tail can be seen curving toward the north. From this point onward, the comet will gradually fade and descend lower toward the horizon, making it increasingly difficult to observe.
View angle: 2.5×1.7°


2025R2 SWAN on Oct 17, 2025
2025A6 Lemmon on Oct 27, 2025

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