NGC 2403 NGC 2403 (also known as Caldwell 7) is an intermediate spiral galaxy in the constellation Camelopardalis. It is an outlying member of the M81 Group, and is approximately 8 million light-years distant. Meade 16″ LX200 @ f6.3, ZWOASI071 MC Pro, Stellarvue Access 80mm guide scope with Sbig St-i guider. Backyard Dome image. Pixinsight EZ Suite.