Galaxy NGC 6946 and Star Cluster NGC 6939 in Cepheus
Imaged 2007 September 14th at the Kelling
Heath Star Party, Norfolk, UK
Televue TVNP101 100mm APO refractor 540mm fl.
Sbig ST4 autoguider on G11 Mount
Starlight Xpress HX916 CCD camera
True Tech RGB colour filters
LRGB image L 60 mins 1x1, R 20 mins 2x2 G 20mins 2x2, B 20mins 2x2, 120 minute total exposure.
All 5 min sub exposures.
The Luminance and RGB colour components were taken from Kelling Heath during the Equinox star party. The sky was dark but slightly hazy and the conditions were still but the air was very turbulent making guiding difficult. 17th magnitude galaxy UGC 11583 just visible half way down the right hand edge of the frame.