SU UMa superoutburst? The SU UMa-type prototype star is reported to undergo a bright outburst. The latest superoutburst of SU UMa was observed in 1997 June-July. Confirmatory observations are encouraged. YYMMDD(UT) mag observer 981220.964 146 (G. Comello) 981221.683 <140 (T. Watanabe) 981221.840 142 (T. Kinnunen) 981221.853 <132 (M. Westlund) 981223.324 <141 (L. E. Shaw) 981223.840 146 (T. Kinnunen) 981224.749 <140 (H. Maehara) 981225.631 <139 (T. Watanabe) 981227.960 114 (J. Ripero)