  The physical parameters of the stars in the central region of the globular
cluster M5 (NGC 5904) were determined from UBV photometry using Kurucz (1992)
synthetic flux distributions and some empirical relations. It is found that the
bluest horizontal branch stars have higher luminosities than predicted by
canonical zero-age horizontal branch models. Parameters of the mass
distribution on the HB stars are determined. It is shown that the gap in the
blue HB previously reported (Markov et al. 1999) is probably a statistical
fluctuation.
