Period Change of Superhumps in a WZ Sge-Type Dwarf Nova, HV Virginis

After 10 years of quiescence, HV Vir underwent a superoutburst in 2002 January. We report on time-series observations that clearly reveal the period change of ordinary superhumps during the superoutburst. We derived a mean superhump period of 0.058260d and a positive period derivative of 7 × 10 −5 . These results are in good agreement with a value obtained from the 1992 superoutburst. We also detected early superhumps, which were not clearly recognized in the past outburst, and a possible rebrightening. Both of them are common characteristics of WZ Sge-type stars.