  We derive basic stellar parameters (angular diameters, effective
temperatures, metallicities) and interstellar reddening for all beta Cephei
stars observed during the IUE satellite mission, including those belonging to
three open clusters. The parameters are derived by means of an algorithmic
procedure of fitting theoretical flux distributions to the low-resolution IUE
spectra and ground-based spectrophotometric observations. Since the metallicity
has a special importance for pulsating B type stars, we focus our attention in
particular on this parameter.
