Trumpler 1
Number of stars per data source
Reference 320 : 1288 stars
References
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