NGC 2331
 
NGC 2331 is a open cluster located in the constellation of Gemini. The NGC is a catalog of 7,840 nebulae, star clusters, and galaxies. Here are the key stats on NGC 2331:
| NGC: | NGC 2331 | 
| Type: | open cluster | 
| Constellation: | Gemini | 
| V-mag (visual): | 8.5 | 
| Right Ascension: | 07:06:59.83 | 
| Declination: | 27:15:41.70 | 
| Major axis: | 4.8 ' | 
Right Ascension (RA) units = HH:MM:SS.SS
Declination (Dec) units = DD:MM:SS.SS