NGC 1664

Combination of 15, 1 minute images unfiltered.
SBIG STL-1001E CCD. 20" f/6.8 Dall-Kirkham cassegrain telescope at prime focus.

NGC 1664 is a moderately large and bright open cluster in Auriga. Rich in fainter stars grouped closely together in the central regions, the cluster is a fine sight in a small telescope.