Collinder 69

Number of stars per data source

	Reference   40 :   24 stars
	Reference   84 :  146 stars

40: Murdin P., Penston M.V.; (1977) Mon. Not. R. Astr. Soc. 181, 657; The lambda Orionis association; 1977MNRAS.181..657M
84: Barrado y Navascues D., Stauffer J.R., Bouvier J., Jayawardhana R., Cuillandre J.-C.; (2004) Astrophys. J. 610, 1064; The substellar population of the young cluster lambda Orionis; 2004ApJ...610.1064N