Comet Hartley 2 on Dec 8, 2023


Date & Time: Dec 8 2023, from 25:20 to 25:57 JST(+0900)
Composed 10 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 day, comet 103P/Hartley 2 was located approximately 6 degrees WSW of α Hydrae, in the western part of the constellation. The comet was slowly diminishing in brightness as it moved southward. Compared to the previous month, it had become even fainter, with a coma brightness of 11th magnitude.
View angle: 0.70×0.70°


Pons-Brooks on Aug 18, 2023
Hartley 2 on Nov 18, 2023

Copyright(c) 2023 by Naoyuki Kurita, All rights reserved.
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