Open cluster M23
Photo description / processing
Open star cluster M23 in the constellation Sagittarius. The arrangement of the cluster's stars and the nearby surrounding stars resembles a long-necked bird in flight, with a bright blue star at its head.
The object's altitude during imaging was about 20 degrees. Shot from a high-rise balcony in a red zone of light pollution.
Technical information
- Telescope/Lens
- Sky-Watcher 130PDS
- Camera
- Canon EOS 550D
- Mount
- Sky-Watcher EQ5
- Guide Scope
- No guide
- Accessories
- Sky-Watcher Coma Corrector 2-inch
- Software
- DeepSkyStacker, FitStacker, PhotoShop
- Location
- Kharkiv, Ukraine
Light pollution
Red, Bortle 7 zone
- Date taken
Exposure
- 203 × 20″ · ISO/Gain: 3200 ·
Total exposure: 1 h 8 m









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