NGC 2439
Number of stars per data source
Reference 137 : 1 star
Reference 345 : 1 star
Reference 463 : 1 star
References
- 137
- Gronbech B., Olsen E.H.
- (1976) Astron. Astrophys. Suppl. 25, 213
- Four colour uvby photometry for bright O to G0 type stars south of declination +10
- 1976A&AS...25..213G
- 345
- Olsen E.H.
- (1983) Astron. Astrophys. Suppl. 54, 55
- Four-colour ubvy and Hbeta photometry of A5 to G0 stars brighter than 8.3m
- 1983A&AS...54...55O
- 463
- Gray R.O., Olsen E.H.
- (1991) Astron. Astrophys. Suppl. 87, 541
- The calibration of the Stromgren photometric system for A, F and early G supergiants. I. The observational data
- 1991A&AS...87..541G