NGC 6888 - The Crescent Nebula
A nebula that is the result of the gaseous outflow of the Wolf-Rayet star WR 136.

  • RA: 20:13
  • Dec: 38:19
  • Size: 20x10'
  • Magnitude: 10.0
  • Distance: 4700 lyrs
  • Constellation: Cygnus
  • Millennium Star Atlas: Vol. III, p. 1149-50
  • Scope: 12.5" Ritchey-Chretien at f/9
  • Autoguider: ST-4 in average mode
  • Sky conditions: Good transparency, excellent seeing
  • Film: FLI Dream Machine CCD
  • Exposure: 20x90 seconds L, 8,8,10x300 seconds R,G,B
  • Date: 6-30-03 (Luminance) and 7-2-03 (RGB)

All went quite well for the luminance data set but the color acquisition was a bit more problematic with the neighbors touching off fireworks and a brief but very intense aurora that was reminiscent of the rolling skies of the movie Damnation Alley. Thankfully, all of those disturbances were over with by the time I was ready to start shooting and the incoming storms didn't show until the next morning.


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