The Great Orion Nebula (Orion Nebula)

Emission-reflection Great Orion Nebula (Messier 42, NGC 1976, Sh-2 281)
De Mairan's emission nebula (Messier 43, NGC 1982) (region of ionized hydrogen H II)
Reflection nebula "Running Man" (NGC 1977) (gas-dust cloud)
Open star cluster NGC 1980 "The Lost Jewel of Orion" (OCL 529, Collinder 72, The Lost Jewel of Orion)

Equipment:
Camera Canon EOS 200 Da.
Tube Synta SkyWatcher 150/750, F/5
Mount HEQ-5 Pro
Bahtinov mask
Polar scope camera iOptron iPolar
Coma corrector Baader MPCC Mark III
Guide scope SVBONY 60/240, F/4
Guide camera ZWO ASI 120 Mini
Flat panel Gemini 190 mm

Capture software:
Astrophotography Tool, SharpCap (polar alignment), EQ-Mode, ASCOM, Cartes Du Ciel, PHD2

Suburb of Chelyabinsk, Starokamyshinsk district
Red light pollution zone. Class 7 on the Bortle scale.

1) Capture session from 08.10.2025: 16 Light frames of 15 seconds each for the central part
ISO 800
2) Capture from 23.10.2026: 73 Light frames of 90 seconds + 15 Dark frames + 20 Bias frames + 20 Flat frames
ISO 800
3) Capture from 07.10.2026: 138 Light frames of 90 seconds + 15 Dark frames + 20 Bias frames + 20 Flat frames
ISO 800

Accumulated signal Σ=5h16'30" - periphery
Accumulated signal Σ=0h4'00" - central part

Post-processing software:
DeepSkyStacker, FitsWork, FITStacker, Siril, Lightroom, StraNet2GUI, Photoshop.