RZ Sge possible superoutburst The SU UMa-type dwarf nova RZ Sge is possibly undergoing a superoutburst. The last confirmed superoutburst of RZ Sge occurred in 1999 July. YYYYMMDD(UT) mag observer 20000609.026 <147 (P. A. Dubovsky) 20000609.425 <163 (G. Hanson) 20000609.967 <149 (M. Reszelski) 20000610.300 <143 (M. Simonsen) 20000610.428 <163 (G. Hanson) 20000610.912 <140 (M. Reszelski) 20000610.965 <143 (P. A. Dubovsky) 20000611.043 <144 (C. P. Jones) 20000611.387 <163 (G. Hanson) 20000612.942 <137 (M. Reszelski) 20000612.960 <134 (P. Schmeer) 20000613.069 130 (P. Schmeer) 20000613.903 128 (M. Reszelski) 20000613.953 125 (M. Reszelski)