The Rosette Nebula - NGC 2244, 2237, 2238, 2239, and 2246

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Published in Sky & Telescope
February, 2005

Image Data: Object Information:
  • Exposure:  HaRGB 20x15:10x10:10x5.33:10x4.41 minutes
    • All exposures binned 1x1
    • Custom Scientific 4.5nm H-alpha filter
  • Telescope:  Stellarvue SV80S @ f/4.9
  • Mount:  Meade LX200 w/ super wedge
  • Camera:  SBIG ST-2000XM CCD, SBIG CFW-8
  • Location:  My backyard in Goleta, CA
  • Date/Time: 
    • Ha:  August 6/7 2004, 23:58-05:04 PDT
    • RGB:  August  7/8 2004, 21:44-01:12 PDT
  • Processing:  Taken  in CCDSoft v5 using custom sequence/dithering software.  Reduced and aligned in CCDSoft.  Combined sub-exposures with Ray Gralak's Sigma Clip.  DDP to with custom software.  Selective Unsharp Mask/blur in Photoshop CS.  Minimum filter to RGB in Photoshop.  Ha applied as Luminance in Photoshop.  Consderable color balancing in Photoshop to help with "salmon" cast of the HaRGB process.
  • Name: The North American Nebula, NGC7000
  • Type:  Emission Nebula
  • Constellation:  Cygnus
  • Distance: 1800-2000 light years
  • Physical Diameter: 65 light years
  • Angular Diameter:  ~120'

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