NGC 225

Number of stars per data source

	Reference   64 :    2 stars
	Reference  309 :   14 stars

64: Svolopoulos S.N.; (1962) Astrophys. J. 136, 788; Spectral classifications in nine open clusters; 1962ApJ...136..788S
309: Lattanzi M.G., Massone G., Munari U.; (1991) Astron. J. 102, 177; Memberships and CM diagrams of young open clusters: I. NGC 225; 1991AJ....102..177L