AT Cnc entering a standstill? The Z Cam-type dwarf nova AT Cnc may be entering a standstill, as suggested by the decreased outburst amplitude. The object entered the latest observed standstill in 1999 Feb. YYYYMMDD(UT) mag observer 20000105.613 <142 (R. Stubbings) 20000106.942 <140 (E. Muyllaert) 20000107.058 <140 (P. A. Dubovsky) 20000107.644 <138 (R. Stubbings) 20000108.411 128 (M. Simonsen) 20000108.554 134 (R. Stubbings) 20000108.699 <127 (H. Maehara) 20000108.999 127 (G. Poyner) 20000109.558 130 (R. Stubbings) 20000109.985 128 (G. Poyner) 20000110.582 130 (R. Stubbings) 20000111.558 135 (R. Stubbings) 20000112.535 138 (R. Stubbings) 20000113.529 139 (R. Stubbings) 20000114.326 137 (M. Simonsen) 20000115.992 133 (G. Poyner) 20000117.509 134: (R. Stubbings)