NGC 6231
Caldwell 76
 
NGC 6231 is a open cluster located in the constellation of Scorpius. The NGC is a catalog of 7,840 nebulae, star clusters, and galaxies. Here are the key stats on NGC 6231:
| NGC: | NGC 6231 | 
| Common name: | Caldwell 76 | 
| Type: | open cluster | 
| Constellation: | Scorpius | 
| V-mag (visual): | 2.6 | 
| B-mag (blue): | 2.83 | 
| Right Ascension: | 16:54:10.92 | 
| Declination: | -41:49:27.30 | 
| Major axis: | 13.8 ' | 
| Radial velocity: | -19 km/s | 
| Redshift: | -0.00006 | 
Right Ascension (RA) units = HH:MM:SS.SS
Declination (Dec) units = DD:MM:SS.SS