Trumpler 1

Number of stars per data source

	Reference   86 :  670 stars
	Reference  320 : 1289 stars

86: Phelps R.L., Janes K.A.; (1994) Astrophys. J. Suppl. 90, 31; Young open cluster as probes of the star formation process. I. An atlas of open cluster photometry; 1994ApJS...90...31P
320: Yadav R.K.S., Sagar R.; (2002) Mon. Not. R. Astron. Soc. 337, 133; A deep UBVRI CCD photometric study of the open clusters Tr 1 and Be 11; 2002MNRAS.337..133Y