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