vdB-Hagen 99

Number of stars per data source

	Reference  206 :    1 star
	Reference  300 :    4 stars
	Reference  453 :   24 stars

206: Sterken C.; (1977) Astron. Astrophys. 57, 361; Light variations of extreme galactic B-and A supergiants; 1977A&A....57..361S
300: Olsen E.H.; (1982) Astron. Astrophys. Suppl. 48, 165; uvby beta photometry of visual double stars : absolute magnitudes of intrinsically bright stars; 1982A&AS...48..165O
453: Landolt A.U., Perry C.L., Levato O.H., Malaroda S.M.; (1990) Astron. J. 100, 695; Multicolor photometric and spectroscopic observations of the van den Bergh and Hagen cluster no 99; 1990AJ....100..695L