NGC 6530
Number of stars per data source
Reference 2 : 1 star
Reference 3 : 2 stars
Reference 5 : 1 star
References
- 2
- Crawford D.L., Perry C.L.
- (1966) Astron. J. 71, 206
- Four-color and Hbeta photometry of open clusters I. The Hyades
- 1966AJ.....71..206C
- 3
- Crawford D.L., Barnes J.V.
- (1969) Astron. J. 74, 407
- Four-color and Hbeta photometry of open clusters II. Coma and Ursa Major
- 1969AJ.....74..407C
- 5
- Cameron R.C.
- (1966) Georgetown Obs. Monogr. no. 21
- An investigation of the magnetic and related stars through narrow-band photometry
-