M31 (highlighting H-alpha regions)

 Posted: Feb 27th, 2026
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Technical Info
Telescope/Lens: Askar SQA 85 мм f/4.8
Camera: ZWO ASI 2600 MC
Mount: Ioptron HAE 29 C
Guide Scope: Askar 52 мм F4
Guide Camera: ZWO ASI 120 MM mini
Software: SharpCap 4.0, Siril, GraXpert
Exposure:
236 x 180" ISO/Gain: 100 - RGB
101 x 300" ISO/Gain: 100 - Askar D1 DUO (Oiii+Ha) 6 нм
Orange, Bortle 6 zone:
 Petushki Vladimirskaya Oblast, Russia
 Sep 15th, 2025
20 h 13 m
17
Resolution: 5749x3733 px
Scale: 1943 KB
The imaging was carried out over several days: from late August to mid-September 2025.

Some of the data was captured under an almost full moon.

I utilized all the capabilities of Ricardo's new Siril scripts, and also employed pixel math in Siril to add narrowband H-alpha (Ha) data to the broadband RGB image.
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