Pac-Man Emission Nebula

Pac-Man Emission Nebula NGC 281 (IC 11, LBN 616, Sh2-184) in the constellation Cassiopeia
An HII region of ionized hydrogen, an active star-forming area.
Various gas-dust clouds and globules are visible in the center of the nebula.
Also in the center is the open star cluster IC 1590

Equipment and software:
Camera Canon EOS 550 D.
Telescope Synta SkyWatcher 150/750, F/5
Mount HEQ-5 Pro
Bahtinov mask
Polar alignment camera iOptron iPolar
Baader MPCC Mark III coma corrector

Software for acquisition:
Astrophotography Tool
SharpCap (polar alignment)
EQ-Mode
ASCOM
Cartes Du Ciel

Imaging from 28-29.08.2025, suburbs of Chelyabinsk, Kremenkul area
Red zone light pollution. Bortle scale class 7
Total 838 Light frames at 20 seconds + 50 Dark frames + 50 Bias frames
ISO 3200

Total integrated exposure Σ=4h39'20"

Software for post-processing:
DeepSkyStacker
FitsWork
FITStacker
Lightroom
StraNet2GUI
Photoshop
Topaz Denoise AI