Caldwell 10 Open Cluster on 2024-10-10,11

Caldwell 10 is also know as NGC 663. It is a young open star cluster in the constellation of Cassiopeia. It has about 400 stars and spans about a quarter of a degree across the sky. The estimated age of Caldwell 10 is 20 to 25 million years. NGC 663 has many bright blue stars and two red supergiant stars. The cluster is located about 6,850 light-years from Earth. My photo includes the much smaller open cluster NGC 654 located near the top-right corner.

This photo was taken in Kyle, Texas, through a 6-inch f/4 Telescope, on a EQ6-R mount, with a ZWO ASI533MC PRO color camera, plus a Optolong L Pro Light Pollution Filter. The processing was done in PixInsight. The total image acquisition time is: 2 hrs 11 min 30 sec.

Full Size View Full size files are very large and can take a minute to download. To zoom in or out on a computer, hold down the Ctrl key and use the scroll mouse button, or you can press the + or - key.