Reflection nebula "Iris" (Iris Nebula) NGC 7023, Caldwell 4
Photo description / processing
Reflection nebula "Iris" (Iris Nebula) NGC 7023, Caldwell 4
A large gas-dust cloud of complex composition.
In the center is a binary system of young Herbig Ae/Be stars.
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
Guidescope 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.
Red light pollution zone. Class 7 on the Bortle scale.
Capture 05-06.05.2026
Total 109 light frames of 90 seconds each + 20 dark frames + 20 bias frames + 20 flat frames
ISO 800
Capture 06-07.05.2026
Total 104 light frames of 90 seconds each + 20 dark frames + 20 bias frames + 20 flat frames
ISO 800
Total integration time Σ=5h19'30"
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
Light pollution
Red, Bortle 7 zone
- Date taken
Exposure
- 109 × 90″ · ISO/Gain: 800 ·
- 104 × 90″ · ISO/Gain: 800 ·
Total exposure: 5 h 20 m
Comments
There are no comments on this photo yet.
Sign up or sign in to leave a comment.