Crescent nebula (NGC6888)in Cygnus

Updated : 12 September 2004.

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n6888_120-sigclpHa_DDP_IP_PS.jpg (1000 kB)
  • CCD : STL11000M ABG 1x1 binning
  • Exposure time : 120 min H-alpha (15 min individual exposures)
  • Date and Time : 08.09.2004
  • Instrument : 40cm f/3.3
  • Focal length : 1320 mm
  • FWHM :
  • Filters : Astronomik H-alpha filter (13nm FWHM)
  • Image processing : sigma clip combine, darks
  • Problems/comments : Further processing in Imageplus (DDP) and Photoshop (JPEG).

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