NGC 2506
Number of stars per data source
Reference 11 : 195 stars
Reference 85 : 801 stars
References
- 11
- Purgathofer A.
- (1964) Ann. Univ. Sternw. Wien 26 no 2
- Dreifarben Photometrie in offenen Sternhaufen sowie in zwei Sternfelden in Cygnus
-
- 85
- McClure R.D., Twarog B.A., Forrester W.T.
- (1981) Astrophys. J. 243, 841
- The old open cluster NGC 2506 and its similarity to NGC 2420
- 1981ApJ...243..841M