NGC 6530

Number of stars per data source

	Reference    7 :    1 star
	Reference   15 :    1 star
	Reference   27 :    3 stars
	Reference   71 :    1 star
	Reference  100 :    1 star

7: Johnson H.L.; (1965) Astrophys. J. 141, 923; Interstellar Extinction in the Galaxy; 1965ApJ...141..923J
15: Johnson H.L., Mitchell R.I., Iriarte B., Wisniewski W.Z.; (1966) Comm. Lun. Plan. Lab. 4, 99; UBVRIJKL Photometry of the Bright Stars
27: Mendoza E.E.; (1968) Obs. Astron. Nacional Cerro Calan no 7, 106; Some Characteristics of Infrared Colors
71: Mendoza E.E., Gomez V.T., Gonzalez S.; (1978) Astron. J. 83, 606; UBVRI Photometry of 225 Am Stars; 1978AJ.....83..606M
100: Fernie J.D.; (1983) Astrophys. J. Suppl. 52, 7; New UBVRI Photometry for 900 Supergiants; 1983ApJS...52....7F