YZ Cnc superoutburst The SU UMa-type dwarf nova YZ Cnc is apparently undergoing a superoutburst as indicated by the following observations. The last superoutburst of YZ Cnc occurred in 1999 November-December. YYYYMMDD(UT) mag observer 20000222.781 141 (G. Comello) 20000222.881 <136 (E. Muyllaert) 20000222.937 <142 (J. Ripero) 20000224.658 <133 (H. Maehara) 20000224.935 <142 (J. Ripero) 20000225.842 146 (G. Comello) 20000225.869 <136 (E. Muyllaert) 20000225.901 144 (G. Poyner) 20000225.908 <142 (J. Ripero) 20000226.131 152: (G. Hanson) 20000226.800 126 (M. Verdenet) 20000226.819 130: (J. Gunther) 20000226.842 129 (E. Muyllaert) 20000226.853 130 (G. Comello) 20000227.016 119 (J. Ripero) 20000227.128 120 (G. Hanson) 20000227.444 119 (R. Stubbings) 20000227.810 120 (M. Verdenet) 20000228.006 119 (J. Ripero) 20000228.306 117 (M. Simonsen) 20000228.794 117 (G. Comello) 20000228.801 116 (R. J. Bouma) 20000228.858 119 (E. Muyllaert) 20000229.124 117 (G. Hanson) 20000229.219 110 (M. Simonsen)