NGC 2251
Number of stars per data source
Reference 2 : 59 stars
Reference 221 : 610 stars
References
- 2
- Hoag A.A., Johnson H.L., Iriarte B., Mitchell R.I., Hallam K.L., Sharpless S.
- (1961) Publ. Us. Nav. Obs. XVII part VII, 347
- Photometry of stars in galactic cluster fields
-
- 221
- Zakharova P.E.
- (1986) Astronomical-geodetical investigations p.134
- Photographic UBV photometry of stars in the region of the open cluster NGC 2251
-