NGC 6121
 
NGC 6121 is a globular 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 6121:
| NGC: | NGC 6121 | 
| Messier: | M 4 | 
| Type: | globular cluster | 
| Constellation: | Scorpius | 
| V-mag (visual): | 5.4 | 
| Right Ascension: | 16:23:35.40 | 
| Declination: | -26:31:31.90 | 
| Major axis: | 28.2 ' | 
| Radial velocity: | 71 km/s | 
| Redshift: | 0.000237 | 
Right Ascension (RA) units = HH:MM:SS.SS
Declination (Dec) units = DD:MM:SS.SS