NGC 2251
Number of stars per data source
Reference 173 : 1 star
Reference 1341 : 32 stars
Reference 1385 : 3 stars
Reference 2029 : 3 stars
References
- 173
- Hiltner W.A.
- (1956) Astrophys. J. Suppl. 2, 389
- Photometric polarization and spectrographic observations of O and B Stars
- 1956ApJS....2..389H
- 1341
- Hoag A.A., Johnson H.L., Iriarte B., Mitchell R.I., Hallam K.L., Sharpless S.
- (1961) Publ. US. Nav. Obs. 17, 343
- Photometry of stars in galactic cluster fields
- 1961PUSNO..17..343H
- 1385
- Eggen O.J.
- (1968) Royal Obs. Bull. No. 137
- Three-colour photmetry of 4000 northern stars
- 1968RGOB..137....1E
- 2029
- Celeste Parisi M., Claria J.J., Piatti A.E., Geisler D.
- (2005) Mon. Not. R. Astron. Soc. 363, 1247
- 2005MNRAS.363.1247P