TT Boo superoutburst The SU UMa-type dwarf nova TT Boo is apparently undergoing a superoutburst. The latest confirmed superoutburst occurred in 1999 January. The outburst in 1999 July was an anomalously bright normal outburst. YYMMDD(UT) mag observer 991030.708 <139 (P. A. Dubovsky) 991030.794 <139 (H. McGee) 991101.708 <139 (P. A. Dubovsky) 991102.700 <137 (T. Kinnunen) 991102.712 <128 (P. A. Dubovsky) 991102.740 <139 (E. Muyllaert) 991102.791 <139 (H. McGee) 991104.071 <139 (G. Hanson) 991104.160 <137 (T. Kinnunen) 991105.067 <148 (G. Hanson) 991106.067 <139 (G. Hanson) 991107.740 125 (M. Verdenet) 991110.069 128 (G. Hanson) 991111.066 129 (G. Hanson)