NGC 6604

Number of stars per data source

	Reference   23 :    2 stars
	Reference   38 :    1 star
	Reference   88 :    1 star
	Reference   96 :    1 star
	Reference  275 :    1 star
	Reference  425 :    4 stars
	Reference  999 :    7 stars

References

23: Morgan W.W., Whitford A.E., Code A.D.; (1953) Astrophys. J. 118, 318; Studies in galactic structure. I. A preliminary determination of the space distribution of the blue giants; 1953ApJ...118..318M
38: Hiltner W.A., Johnson H.L.; (1956) Astrophys. J. 124, 367; The law of interstellar reddening and absorption; 1956ApJ...124..367H
88: Conti P.S., Alschuler W.R.; (1971) Astrophys. J. 170, 325; Spectroscopic studies of O-type stars. I. Classification and absolute magnitudes; 1971ApJ...170..325C
96: Conti P.S.; (1973) Astrophys. J. 179, 161; Spectroscopic studies of O-type stars. II. Comparison with non-LTE models; 1973ApJ...179..161C
275: Walborn N.R.; (1972) Astron. J. 77, 312; Spectral classification of OB stars in both hemisphere and the absolute-magnitude calibration; 1972AJ.....77..312W
425: FitzGerald M.P., Luiken M., Maitzen H.M., Moffat A.F.J.; (1979) Astron. Astrophys. Suppl. 37, 345; Analysis of the results of MK classification of 176 stars in 37 southern open clusters; 1979A&AS...37..345F
999: Houk N., Cowley A.P., Smith-Moore M.; University of Michigan (Ann Arbor) Vol 1 (1975), Vol 2 (1978), Vol 3 (1982), Vol 4 (1988), Vol 5 (1999); The University of Michigan Catalogue of two-dimensional Spectral Types for the HD stars; 1975mctd.book.....H