The Iris Nebula (NGC7023)
Photographed by Scott Davis on July 8, 2013
From Golden State Star Party
The Iris Nebula, also catalogued as NGC7023, is a beautiful reflection nebula in the constellation Cepheus. The nebula itself is lit by the bright blue star SAO 19158, but longer exposures and processing reveal that the lit portion is but a small percentage of the rather large gas cloud in the region.
Canon EOS 60D
Orion Astrograph 8" f/3.9 Newtonian
Celestron CGEM (Hypertuned)
Orion Shorttube 80mm w/ Starshoot Autoguider
Camera settings were ISO 1600 with 170-second exposures. A total of 40 light frames, 10 dark frames, and 50 each of flats, dark flats, and bias frames were stacked to create this composite image.
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