Caldwell 76 (NGC 6231) is a open cluster located within the constellation Scorpius.
C76 is best viewed during Summer, is magnitude 2.6*, and can be viewed with naked eye. It is 15' in size. For reference, the full moon is 30' (arc minutes) in size.
- open cluster
- naked eye
- 16 54.0
- -41 48'
* The naked eye can see up to magnitude 8 objects under ideal dark sky conditions.