Comets

Comet C/2022 E3 (ZTF) on Feb 13, 2023 UT

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Comet C/2022 E3 (ZTF) on Feb 13, 2023, 02:55 mid-exposure. 68×120 sec, QHY294C-Pro at -10C, Unity gain, Offset 30, UV/IR filter, Televue TV-85 at F/5.6. Portrait version.
Comet C/2022 E3 (ZTF) on Feb 13, 2023, 02:55 mid-exposure. 68×120 sec, QHY294C-Pro at -10C, Unity gain, Offset 30, UV/IR filter, Televue TV-85 at F/5.6. Landscape version. North is down.

High clouds and dew plagued my imaging session on this night. My dew heater’s power supply failed right at the start, too.

For this full field image, I took 40 sub-images of the comet between 01:49 and 03:09 UT and another 31 subs between 03:19 and 04:21 UT . I only lost 3 subs to guiding problems, despite the clouds.

I thought all the clouds and dew problems I had would ruin the chances of getting a good final image, but I guess I was wrong. 🙂

Technical: 37×120 sec, QHY294C-Pro at -10C, Gain 1600 (Unity,) Offset 30, UV/IR filter, Televue TV-85 at F/5.6, Atlas EQ-G w/EQMOD. PHD2 Guiding, SharpCap 4.x LiveStacking for acquisition, FitsWorks for dark/flat calibration and debayering, IRIS for stacking and PSCS3 for post-processing.

An earlier, more gaudy version with only 37 sub-images:

Comet C/2022 E3 (ZTF) on Feb 13, 2023, 02:30 mid-exposure. 37×120 sec, QHY294C-Pro at -10C, Unity gain, Offset 30, UV/IR filter, Televue TV-85 at F/5.6. Portrait version.
Comet C/2022 E3 (ZTF) on Feb 13, 2023, 02:30 mid-exposure. 37×120 sec, QHY294C-Pro at -10C, Unity gain, Offset 30, UV/IR filter, Televue TV-85 at F/5.6.

c2022e3-2023-02-13-0230UT-37×120-qhy294c_-10C-ug-o30-uvir-85f5_6-v2a

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