NGC 6633
 
NGC 6633 is a open cluster located in the constellation of Ophiuchus. The NGC is a catalog of 7,840 nebulae, star clusters, and galaxies. Here are the key stats on NGC 6633:
| NGC: | NGC 6633 | 
| Type: | open cluster | 
| Constellation: | Ophiuchus | 
| V-mag (visual): | 4.6 | 
| B-mag (blue): | 5.01 | 
| Right Ascension: | 18:27:15.23 | 
| Declination: | 06:30:29.60 | 
| Major axis: | 12 ' | 
| Radial velocity: | -29 km/s | 
| Redshift: | -0.00009 | 
Right Ascension (RA) units = HH:MM:SS.SS
Declination (Dec) units = DD:MM:SS.SS