Ha M31 the Andromeda Galaxy (the Andromeda Galaxy)

 Posted: Sep 27th, 2026
Technical Info
Telescope/Lens: Askar FRA500
Camera: ZWO ASI2600MM PRO
Mount: Sky-Watcher EQ6-R PRO
Guide Scope: ZWO OAG-L
Guide Camera: ZWO ASI220MM
Software: PixInsight, RC-Astro plugins
Accessories: Sharpstar Focal Reducer 0.7x ASKAR FRA 400 / 500
Exposure:
67 x 600" ISO/Gain: 100 - Antlia H-a 3nm
125 x 1000" ISO/Gain: 100 - Antlia H-a 3nm (Krasnodar)
 Mezmay Solnechnyy Veter, Россия
 Aug 13th, 2026
45 h 53 m
5
Resolution: 12228x8070 px
Scale: 46879 KB
Here's how hydrogen looks with an adequate and simple full stretch. Due to the contrast between the white and black background, it stands out more than in color, of course) But I'll make another version LRGBHa with a maximally stretched background for likes =)

Don't forget to look closely at the nebulae in the "rings" of the galaxy. They deserve far more attention.

I'm not sure I integrated two different stacks correctly, but the noise, as I wrote earlier, decreased by a whole 1.5% =D By the way, this is already Drizlle 2x
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