Hogg 9
Number of stars per data source
Reference 460 : 9 stars
References
460
Moffat A.F.J., Vogt N.
(1975) Astron. Astrophys. Suppl. 20, 125
Southern open star clusters. V. UBV Hbeta photometry of 20 clusters in Carina
1975A&AS...20..125M