Gamma Cassiopeia

 Posted: Sep 27th, 2026
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NGC
IC
HD
Technical Info
Telescope/Lens: Askar 71F
Camera: ZWO ASI2600MM PRO
Mount: JUWEI 14
Guide Scope: ToupTek GS-200 AR
Guide Camera: ZWO ASI662MC
Software: Siril, Lightroom
Accessories: CAA, EAF, EFW, ASIAIR MINI, Askar Reducer x 0.75, Gemini PowerBox
Exposure:
189 x 300" ISO/Gain: 100 - Antlia EDGE Ha 4.5 nm
151 x 120" ISO/Gain: 100 - Optolong L
15 x 120" ISO/Gain: 100 - Optolong R
27 x 120" ISO/Gain: 100 - Optolong G
26 x 120" ISO/Gain: 100 - Optolong B
Yellow, Bortle 5 zone:
 Samara, Russia
 Sep 25th, 2026
23 h 3 m
10
Resolution: 5123x2882 px
Scale: 14867 KB
That case when one pixel decides everything; for a long time I couldn't understand why the result of the math didn't satisfy me. The reason is clipping of a pixel under the star Navi. Until I manually dimmed it, it didn't work properly. I didn't integrate the hydrogen too heavily since there's a critical lack of proper RGB; the background is painfully loose, one could say masked by stars.
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