Ruprecht 55

Number of stars per data source

	Reference  115 :    1 star
	Reference  154 :    1 star
	Reference  190 :    1 star

115: Moffat A.F.J., Vogt N.; (1975) Astron. Astrophys. Suppl. 20, 85; Southern open star clusters IV. UBV-Hbeta photometry of 26 clusters from Monoceros to Vela; 1975A&AS...20...85M
154: Havlen R.J.; (1972) Astron. Astrophys. 17, 413; OB Star Distribution in Puppis; 1972A&A....17..413H
190: Klare G., Neckel T.; (1977) Astron. Astrophys. Suppl. 27, 215; UBV Hbeta and polarization measurements of 1660 southern OB stars; 1977A&AS...27..215K