M81 M82 NGC3077

 Posted: May 9th, 2026
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NGC
IC
HD
Technical Info
Telescope/Lens: Sky-watcher 200PDS
Camera: ZWO ASI 2600MM Pro
Mount: МТ-120
Guide Scope: Orion 80/400
Guide Camera: ZWO Asi 662mc
Software: Pixinsight, Photoshop, DeepSkyStacker, Siril
Accessories: Starizona 0.75 Nexus Reducer, ZWO EFW, ZWO EAF
Exposure:
16 x 300" ISO/Gain: 100 - B
26 x 300" ISO/Gain: 100 - G
32 x 300" ISO/Gain: 100 - R
15 x 300" ISO/Gain: 100 - L
Green, Bortle 4 zone:
 Derevnya Novaya Doroga, Russia
 May 7th, 2026
7 h 25 m
3
Resolution: 6013x3752 px
Scale: 19926 KB

I bought the camera in winter.
For a long time, snowdrifts lay in the village and the observatory roof wouldn't open due to the frost.
In April, I finally got the new camera up and running — all the components for adjusting the back focus and so on arrived.
At the end of April, there were only a few days left to capture the RGB channels, which I did. Then came the Moon... a full Moon. I tried to shoot H-alpha on all those nights, but didn't manage to extract much. Some data was simply lost during H-alpha integration. I shot the L channel in May, and added a bit more RGB. Now the weather has turned bad, and the dark time (Sun below 14 degrees) is only about two hours. I see no point in further accumulating LRGB channels, so I'm posting the work as is — everything I managed to gather over 15 days. 
I'm almost satisfied with the processing — I managed to bring out the IFN without losing saturation. All thanks to PixInsight. 
Greetings to the haters — I used BlurXTerminator here only for star correction (not applied to galaxy details). I did without StarXTerminator because it slightly kills the galaxy clusters, of which there are many here. 

 

The H-alpha version will come later. 

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