NGC 1647
Number of stars per data source
Reference 64 : 8 stars
Reference 207 : 1 star
References
- 64
- Svolopoulos S.N.
- (1962) Astrophys. J. 136, 788
- Spectral classifications in nine open clusters
- 1962ApJ...136..788S
- 207
- Hoag A.A., Applequist L.
- (1965) Astrophys. J. Suppl. 12, 215
- Distance moduli of open clusters
- 1965ApJS...12..215H