NGC 3228

Number of stars per data source

	Reference   50 :    9 stars
	Reference   51 :    7 stars
	Reference   72 :    1 star
	Reference  130 :   51 stars

50: Cannon A.J., Pickering E.C.; (1918-1924), Ann. Obs. Harvard Coll. Obs. 91 to 99 and 100; Henry Draper catalogue and extension
51: Cannon A.J., Mayall W.M.; 1949) Ann. Harvard Coll. Obs. 112; Henry Draper extension 2
72: Hogg A.R.; (1963) Monthly Notices Roy. Astron. Soc. 125, 307; The galactic cluster NGC 3228; 1963MNRAS.125..307H
130: Wooden W.H. II; (1971) Publ. Warner and Swasey Obs. 1 no 2; Space distribution of stars in the southern Milky Way: II. A region in Vela; 1971PW&SO...1b...1W