Globular clusters M28 & NGCC6638
Photo description / processing
A pair of globular clusters in the constellation Sagittarius. At the top right is M28, on the left is NGC 6638. In the center is the fairly bright orange giant λ Sagittarii, or Kaus Borealis. These objects have a declination of about -25 degrees, and during the capture, they were about 10 degrees above the horizon.
Balcony in Kharkiv, red zone 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
Exposure
- 223 × 20″ · ISO/Gain: 6400
Total exposure: 1 h 14 m









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