NGC 5138
Number of stars per data source
Reference 10 : 18 stars
Reference 50 : 2 stars
References
- 10
- Lindoff U.
- (1972) Astron. Astrophys. Suppl. 7, 231
- An investigation of four southern open clusters
- 1972A&AS....7..231L
- 50
- Cannon A.J., Pickering E.C.
- (1918-1924), Ann. Obs. Harvard Coll. Obs. 91 to 99 and 100
- Henry Draper catalogue and extension
-