NGC 6633

Number of stars per data source

	Reference   15 :   25 stars
	Reference   88 :    1 star
	Reference  117 :    6 stars

15: Goodenough D.G.; (1970) Bull. American Astron.Soc. 2, 318; Six colour photometry of galactic clusters; 1970BAAS....2..318G
88: Eggen O.J.; (1990) Publ. Astron. Soc. Pacific 102, 507; Large and kinematically unbiased samples of G-and K-type stars. VI. Evolved stars in the moore-paddock-wayman sample; 1990PASP..102..507E
117: Clariá J.J., Piatti A.E., Mermilliod J.-C., Palma T.; (2008) Astron. Nachr. 329, 609; Photometric membership and metallicities of red giant candidates in selected open clusters; 2008AN....329..609C