NGC 6231

Number of stars per data source

	Reference    1 :   11 stars
	Reference   16 :    9 stars
	Reference   33 :    7 stars
	Reference   41 :   14 stars
	Reference   98 :    2 stars
	Reference  128 :   44 stars
	Reference  198 :  558 stars

References

1: Egret D.; (1986) Private Communication; Coordinates from SIMBAD (mainly SAO)
16: Stephenson C.B., Sanduleak N.; (1971) Publ. Warner Swasey Obs. 1 no 1; Luminous stars in the southern Milky Way
33: Egret D.; (1986) Private communication; Coordinates from SIMBAD (other than SAO)
41: Heske A., Wendker H.J.; (1984) Astron. Astrophys. Suppl. 57, 205; UBV photometry of Tr 24 and its relation to Sco OB1; 1984A&AS...57..205H
41: Heske A., Wendker H.J.; (1985) Astron. Astrophys. 151, 309; Further photometry and spectroscopy in the young cluster region Tr 24 / Sco OB1; 1985A&A...151..309H
98: Tucholke H.-J.; (1989) Astron. Astrophys. Suppl. 78, 187; Positions of southern open cluster stars proposed for the Hipparcos mission; 1989A&AS...78..187B
128: Lasker B.M., Russel J.N., Jenkner H., Sturch C.R., McLean B.J., Shara M.M.; (1990) Astron. J. 99, 2019; The HST guide star catalogue, version 1.0; 1990AJ.....99.2019L
198: Sung H., Bessell M.S., Lee s.-W.; (1998) Astron. J. 115, 734; UBVRI Halpha photometry of the young open cluster NGC 6231; 1998AJ....115..734S