Berkeley 33
Number of stars per data source
Reference 594 : 5 stars
References
- 594
- Carraro G., Geisler D., Villanova S., Frinchaboy P.M., Majewski S.R.
- (2007) Astron. Astrophys. 476, 217
- Old open clusters in the outer Galactic disk
- 2007A&A...476..217C