Comet Hartley 2 on Oct 20, 2023


Date & Time: Oct 20 2023, from 26:45 to 27:22 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 in the western part of Cancer, and an 8th magnitude blueish and diffuse coma was observed. Although extremely faint, it appears to have a tail extending in the northwest direction. Currently, the comet is approaching its maximum brightness and is expected to rapidly decrease in brightness as it moves southward towards the constellation Hydra.
View angle: 0.70×0.70°


Hartley 2 on Nov 18, 2023
Hartley 2 on Sep 9, 2023

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