Haffner 18

Number of stars per data source

	Reference   97 :    1 star
	Reference   98 :    3 stars

97: Fitzgerald M.P., Moffat A.F.J.; (1974) Astron. J. 79, 873; Puppis clusters Haffner 19 and 18ab and the 15 kiloparsec arm; 1974AJ.....79..873F
98: Munari U., Carraro G., Barbon R.; (1998) Mon. Not. R. Astron. Soc. 297, 867; UBV(RI)c photometry and spectroscopy of the young cluster Haffner 18; 1998MNRAS.297..867M