NGC 663
Caldwell 10
 
NGC 663 is a open cluster located in the constellation of Cassiopeia. The NGC is a catalog of 7,840 nebulae, star clusters, and galaxies. Here are the key stats on NGC 663:
| NGC: | NGC 663 | 
| Common name: | Caldwell 10 | 
| Type: | open cluster | 
| Constellation: | Cassiopeia | 
| V-mag (visual): | 7.1 | 
| B-mag (blue): | 7.78 | 
| Right Ascension: | 01:46:16.05 | 
| Declination: | 61:13:05.50 | 
| Major axis: | 6 ' | 
| Radial velocity: | -32 km/s | 
| Redshift: | -0.00010 | 
Right Ascension (RA) units = HH:MM:SS.SS
Declination (Dec) units = DD:MM:SS.SS