Ptolemy Cluster
Ptolemy Cluster is an open cluster (OC) found in the constellation of Scorpius . Here are some key stats on Ptolemy Cluster:
| Cluster name: | Ptolemy Cluster |
| Other designation: | Messier 7 |
| Magnitude: | 3.3 |
| Constellation: | Scorpius |
| Size (arc-minutes): | 80' |
| Age (my): | 224 my |
| Distance (ly): | ly |
| Right Ascension: | 17h 53.8m |
| Declination: | -34° 47' |