Comet 2022E3 ZTF on Jan 28, 2023

Click on image to enlarge

Date & Time: Jan 28 2023, from 24:42 to 25:27 JST(+0900)
Composed 10 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
CMOS Camera: ZWO ASI2600MC Pro (Cooled temp.: -25°C)
Location: Hiraiso, Hitachi-naka city, Ibaraki pref.

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


On this day, Comet 2022E3 ZTF is located on the boundary between Ursa Minor and Draco, and is circumpolar at 76° declination. I could clearly see a coma with a binocular about 6 degrees northwest of β Ursa Minor (Kochab). The apparent diameter of the coma estimated from this photograph is larger than 20 arc minutes. A short bell-shaped dust tail is seen in the WSW direction, and a linear ion tail extends out of the field of view. Due to the comet's close approach to the earth, the anti-tail seen in the eastern direction is much more diffuse than the previous observation.
View angle: 2.4×1.6°


2022E3 ZTF on Jan 30-31, 2023
2022E3 ZTF on Jan 20-21, 2023

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