Stephan's Quintet (NGC 7317, NGC 7318A, NGC 7318B, and NGC 7319)

 Posted: Sep 23rd, 2026
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Technical Info
Telescope/Lens: Askar SQA 85 мм f/4.8
Camera: ZWO ASI 183 MC
Mount: Ioptron HAE 29 C
Guide Scope: Askar 52 мм F4
Guide Camera: ZWO ASI 120 MM mini
Software: SharpCap 4.0, Siril
Exposure:
69 x 300" ISO/Gain: 120
Orange, Bortle 6 zone:
 Petushki Vladimirskaya Oblast, Russia
 Sep 4th, 2026
5 h 45 m
3
Resolution: 851x611 px
Scale: 29 KB

A group of five galaxies in the constellation Pegasus. Four galaxies are actively connected, while the fifth, NGC 7320, is only projected onto the group. In a few million years, the four galaxies will merge into a single elliptical galaxy. Stephan's Quintet is one of the most studied examples of compact galaxy groups.

I tried to pull out the maximum using RC-Astro scripts in Siril. Given the 85 mm aperture and 408 mm focal length, one could say the photo and processing were done as an experiment.

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