SS UMi: possible superoutburst The SU UMa-type dwarf nova SS UMi is undergoing a bright outburst (possibly a superoutburst). The latest superoutburst of SS UMi was observed in 1999 December. The star recently seems to show an increased frequency of superoutbursts. YYYYMMDD(UT) mag observer 20000303.489 <158 (G. Hanson) 20000304.033 <154 (G. Poyner) 20000304.465 <158 (G. Hanson) 20000304.966 <142 (E. Muyllaert) 20000305.194 <145 (G. Poyner) 20000311.112 140 (G. Hanson) 20000311.194 139 (G. Hanson) 20000311.476 140 (G. Hanson)