Combination of 20, 3 minute exposures.
SBIG STL-1001E CCD. 20" f/6.8 Dall-Kirkham cassegrain telescope at prime focus.
Abell 73 is a moderately large, and fairly low surface brightness planetary nebula in Cepheus. The magnitude is quoted as 16.5, and the light is spread out over an area about 1.5 arc minutes across.