NGC 2244

Number of stars per data source

	Reference  158 :  771 stars
	Reference  302 :  574 stars
	Reference  305 :  112 stars

158: Massey P., Johnson K.E., DeGioia-Eastwood K.; (1995) Astrophys. J. 454, 151; The initial mass function and massive star evolution in the OB associations of northern Milky Way; 1995ApJ...454..151M
302: Park B.-G., Sung H.; (2002) Astron. J. 123, 892; UBVI and Halpha photometry of the young open cluster NGC 2244; 2002AJ....123..892P
305: Berghöfer T.W., Christian D.J.; (2002) Astron. Astrophys. 384, 890; Optical properties of X-ray selected stars in NGC 2244 in the Rosetta nebula; 2002A&A...384..890B