NGC 1901

Number of stars per data source

	Reference    1 :    1 star
	Reference   98 :    3 stars
	Reference  128 :   23 stars
	Reference  303 :   30 stars

1: Egret D.; (1986) Private Communication; Coordinates from SIMBAD (mainly SAO)
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
303: Pavani D.B., Bica E., Dutra C.M., Dottori H., Santiago B.X., Carranza G., Diaz R.J.; (2001) Astron. Astrophys. 374, 554; Open clusters or their remnants: B and V photometry of NGC 1901 and NGC 1252; 2001A&A...374..554P