Trumpler 1

Number of stars per data source

	Reference   54 :    1 star
	Reference   89 :   43 stars

54: INCA Hiltner W.A., Iriarte B., Johnson H.L.; (1958) Astrophys. J. 127, 539; The galactic cluster NGC 6633; 1958ApJ...127..539I
89: Oja T.; (1966) Ark. Astr. 4, 15; Determinations of proper motions for stars in the galactic clusters Messier 103 and Trumpler 1 and in their surroundings; 1966ArA.....4...15O