HS Vir superoutburst! The SU UMa-type dwarf nova HS Vir has apparently evolved into a genuine superoutburst (cf. vsnet-alert 4877, vsnet-campaign 121). The May 20 observation may have been a precursor. YYYYMMDD(UT) mag observer 20000519.569 <148 (A. Pearce) 20000520.410 138: (R. Stubbings) 20000521.489 142 (A. Pearce) 20000522.372 143 (R. Stubbings) 20000522.536 145 (A. Pearce) 20000523.394 140 (R. Stubbings) 20000524.385 136 (R. Stubbings) 20000524.492 136 (R. Stubbings) 20000524.564 133 (A. Pearce) Regards, Taichi Kato