Comet Schwassmann-Wachmann 1 on Dec 23, 2022


Date & Time: Dec 23 2022, from 21:00 to 21:45 JST(+0900)
Composed 12 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 Schwassmann-Wachmann 1 was positioned 11.5 degrees WSW of Castor in Gemini in the midnight zenith, and a 11th magnitude coma was observed. The central condensed light has become weaker than the previous observation, but the apparent diameter of the coma has almost doubled to about 4 arc minutes.
  View angle: 0.70×0.70°


2020V2 ZTF on Dec 3, 2022
Schwassmann-Wachmann 1 on Dec 23, 2022

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