Emission nebula "Crescent" (NGC 6888, LBN 203)
Photo description / processing
Emission nebula "Crescent" (NGC 6888, LBN 203)
Result of outflows from the dying supergiant star HD 192163.
Hydrogen glow (H II) - result of ionizing radiation from the star.
Equipment:
Camera Canon EOS 200 Da.
Telescope Synta SkyWatcher 150/750, F/5
Mount HEQ-5 Pro
Bahtinov mask
Polar finder camera iOptron iPolar
Coma corrector Baader MPCC Mark III
Guider 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, Kremenkul area, near Malinovka village
Red light pollution zone. Class 7 on the Bortle scale.
Capture 06-07.07.2026
Total 64 Light frames of 90 seconds each + 5 Dark frames + 5 Bias frames + 5 Flat frames
ISO 800
Capture 18-19.07.2026
Total 66 Light frames of 90 seconds each + 10 Dark frames + 10 Bias frames + 10 Flat frames
ISO 800
Total integration time Σ=3h15'00"
Post-processing software:
DeepSkyStacker, FitsWork, FITStacker, Lightroom, StraNet2GUI, Photoshop, Topaz Denoise AI
Technical information
- Telescope/Lens
- Sky-Watcher 150/750
- Camera
- Canon 200 Da
- Mount
- Sky-Watcher HEQ5 PRO SynScan
- Guide Scope
- SVBONY 60/240
- Guide Camera
- ZWO ASI 120 Mini
- Accessories
- Baader MPCC Mark III, iOptron iPolar, Bahtinov mask, Gemini 190 mm
- Software
- APT, DeepSkyStacker, FitsWork, FITStacker, Lightroom, StraNet2GUI, Photoshop, Topaz Denoise AI
- Location
- Chelyabinsk, Kremenkul', Russia
- Date taken
Exposure
- 64 × 90″ · ISO/Gain: 0 ·
- 66 × 90″ · ISO/Gain: 0 ·
Total exposure: 3 h 15 m
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