NGC 2281
Number of stars per data source
Reference 1 : 1 star
Reference 38 : 3 stars
Reference 50 : 4 stars
References
- 1
- Egret D.
- (1987) Priv. Comm.
- Spectral types from Simbad
-
- 38
- Pesch P.
- (1961) Astrophys. J. 134, 602
- Photometric and objective prism observations in three galactic clusters
- 1961ApJ...134..602P
- 50
- Cannon A.J., Pickering E.C.
- (1918-1924), Ann. Obs. Harvard Coll. Obs. 91 to 99 and 100
- Henry Draper catalogue and extension
-