NGC 6946 - Galaxy in Cepheus
A large Sc-class galaxy on the Cepheus-Cygnus border, probably the next nearest neighbor beyond our local group of galaxies.

  • RA:20:35
  • Dec: 60:10
  • Size: 11.2x9.8'
  • Magnitude: 8.8
  • Distance: 10 Mly
  • Constellation: Cepheus
  • Millennium Star Atlas: Vol. III, p. 1073-4
  • Scope: 12.5" Ritchey-Chretien at f/9
  • Autoguider: ST-4 in average mode
  • Sky conditions: Extremely transparent, superb seeing
  • Film: FLI Dream Machine CCD
  • Exposure: 35x90 seconds L, 6,8,8x300 seconds R,G,B
  • Date: 8-8-02

Unbelievably steady air. That, combined with the nearness of the galaxy to the celestial pole, was giving me tracking errors typically in the 0.3 arcsecond area.


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