NGC 6819
Number of stars per data source
Reference 257 : 19 stars
Reference 436 : 22 stars
Reference 578 : 20 stars
Reference 1231 : 38 stars
References
- 257
- Burkhead M.S.
- (1971) Astron. J. 76, 251
- Photometric observations of the star cluster NGC 6819
- 1971AJ.....76..251B
- 436
- Lindoff U.
- (1972) Astron. Astrophys. Suppl. 7, 497
- The old open cluster NGC 6819
- 1972A&AS....7..497L
- 578
- Jennens P.A., Helfer H.L.
- (1975) Monthly Notices Roy. Astron. Soc. 172, 681
- Photometric metal abundances for twenty clusters
- 1975MNRAS.172..681J
- 1231
- Purgathofer A.
- (1966) Mitt. Univ. Sternw. Wien 13 No. 2
- Der galaktische Sternhaufen NGC 6819
-