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M101 in Ursa Major

Updated : 12 February 2005.

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m101_40-40-40-40sgclpflatLRGBgrem_PS_cropred.jpg (400 kB)

  • CCD : STL11000M ABG 1x1 binning
  • Exposure time : 40:40:40:40 min LRGB (10 min individual exposures)
  • Date and Time : 07. Feb. 2005
  • Instrument : 40cm @ f/8
  • Focal length : 3200 mm
  • FWHM :
  • Filters : Astronomik LRGB filter
  • Image processing : sigma clip combine, darks, flat
  • Problems/comments : Further processing in Imageplus (DDP) and Photoshop. The H-alpha image was done at my backyard, Mol, Belgium

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