  We report spectroscopy of the newly discovered SU Ursae Majoris dwarf nova
identified with the x-ray source RXS J053234.9+624755. Radial velocities of the
H-alpha emission line in the quiescent state give an orbital period of
0.05620(4) d (80.93 min), which is among the shortest for SU UMa stars with
determined periods. We also report UBVI magnitudes of the quiescent dwarf nova
and surrounding stars. Using a previous measurement of the superhump period, we
find the fractional superhump excess epsilon to be 0.016(4), which is not
atypical of dwarf novae in this period range.
