I took three photos with red, green and blue filters on the evening of September 11-12 2002 on the two-meter Plaskett Telescope at the Dominion Astrophysical Observatory. Our telescope operator that night was Julie Bolduc-Duval. The three photos were processed into colour in 2010 by John McDonald.
NGC 6946 is a galaxy 10 million light years away in the constellation Cepheus.