NGC 663
Number of stars per data source
Reference 64 : 8 stars
Reference 203 : 3 stars
Reference 206 : 4 stars
Reference 207 : 2 stars
Reference 284 : 1 star
Reference 427 : 1 star
Reference 731 : 1 star
Reference 862 : 1 star
References
- 64
- Svolopoulos S.N.
- (1962) Astrophys. J. 136, 788
- Spectral classifications in nine open clusters
- 1962ApJ...136..788S
- 203
- Farnsworth A.H.
- (1955) Astrophys. J. Suppl. 2, 123
- Stellar spectra and colors in Milky Way regions in Cassiopeia
- 1955ApJS....2..123F
- 206
- Hiltner W.A.
- (1956) Astrophys. J. Suppl. 2, 389
- Photometric, polarization and spectrographic observations of O and B stars
- 1956ApJS....2..389H
- 207
- Hoag A.A., Applequist L.
- (1965) Astrophys. J. Suppl. 12, 215
- Distance moduli of open clusters
- 1965ApJS...12..215H
- 284
- McCuskey S.W., Pesch P., Snyder G.A.
- (1974) Astron. J. 79, 597
- The space distribution and radial velocities of some early-type stars in the Perseus spiral arm
- 1974AJ.....79..597M
- 427
- Jensen K.S.
- (1981) Astron. Astrophys. Suppl. 45, 455
- Spectral classification in the MK system of 167 northern HD stars
- 1981A&AS...45..455J
- 731
- Hardorp J., Rohlfs K., Slettebak A., Stock J.
- (1959) Astr. Abh. Hamb. Sternw. Bergedorf
- Luminous stars in the northern Milky Way I - VI
-
- 862
- Boulon J., Duflot M., Fehrenbach C., Duflot A., Rebeirot E., Petit M.
- (1960) Publ. Obs. Haute-Provence 4 no 34
- La mesure des vitesses radiales au prisme objectif. IX. 3eme liste de vitesses radiales determinees au prisme objectif a vision directe
-