Comet 2025A6 Lemmon on Oct 27, 2025

Click on image to enlarge

Date & Time: Oct 27 2025, from 18:10 to 18:20 JST(+0900)
Composed 28 shots with 15 seconds exposed
Optical: AF zoom-Nikkor 80-200mmF2.8ED (f=200mm, stop: F4.0)
with IDAS NGS1-DRT Light-pollution suppression filter
Auto-guided with Kenko SKYMEMO S Equatorial
Digital Camera: Canon EOS R6 (Remodeled)
Location: Hitachi city, Ibaraki pref.

Camera Settings: Recording format...14bit CCD-RAW, converted to 16bit TIFF(5472×3648)
Device Size...35×24mm, Sensitivity...ISO800


Comet 2025A6 Lemmon has moved to the western evening sky. On this day, it was located in the head of the constellation Serpens Caput, with its coma reaching a brightness of 4th magnitude. Although the image is blurred due to city lights, both the dust and the ion tails extending more than 4 degrees toward the northeast can just barely be discerned.
This image is cropped to an effective focal length of 300 mm.
View angle: 6.8×4.6°


2025R2 SWAN on Oct 17, 2025
2025A6 Lemmon on early morning of Oct 18, 2025

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