Comet Pons-Brooks on Sep 17, 2023


Date & Time: Sep 17 2023, from 19:50 to 20:16 JST(+0900)
Composed 6 shots with 5 minutes exposed
Optical: TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
with IDAS LPS-D1 Light-pollution suppression filter
Auto-guided with TAKAHASHI EM-200 Equatorial & Lacerta M-GEN
CMOS Camera: ZWO ASI2600MC Pro (Cooled temp.: -10°C)
Location: Furudono town, Fukushima pref.

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


On this day, the comet Pons-Brooks was located at the northern edge of the Hercules, approximately 3.3 degrees SSW of beta Draconis at the constellation's head. I could detect a dimmed coma with a visible diameter of about 10 arcminutes. It appeared slightly fainter compared to the previous observation, and the total brightness of the coma is estimated to be around 12th to 13th magnitudes. The effects of the July 2023 outburst have subsided, and it is currently slowly diminishing in brightness, but it is expected to brighten once again starting in the autumn of 2023.
This image has been cropped with an equivalent focal length of 1000mm.
View angle: 1.35×0.9°


Pons-Brooks on Nov 18-19, 2023
Pons-Brooks on Aug 18, 2023

Copyright(c) 2023 by Naoyuki Kurita, All rights reserved.
To top page To Comets&Meteors index