NGC 6231

Number of stars per data source

	Reference   90 :    1 star
	Reference  271 :    3 stars
	Reference  300 :   17 stars
	Reference  430 :    7 stars
	Reference  578 :   26 stars

90: Herbig G.H.; (1972) Astrophys. J. 174, L89; A highly reddened star near NGC 6231; 1972ApJ...174....0H
271: Schild R.E., Neugebauer G., Westphal J.A.; (1971) Astron. J. 76, 237; Interstellar absorption and color excesses in Sco OB-1; 1971AJ.....76..237S
300: Garrison R.F., Schild R.E.; (1979) Astron. J. 84, 1020; The main sequence of NGC 6231; 1979AJ.....84.1020G
430: Perry C.L., Hill G., Younger P.F., Barnes J.V.; (1990) Astron. Astrophys. Suppl. 86, 415; A study of Sco OB1 and NGC 6231. I. New observational data; 1990A&AS...86..415P
578: Levato H., Malaroda S.; (1980) Publ. Astr. Soc. Pacific 92, 323; Spectral types in the open cluster NGC 6231; 1980PASP...92..323L