V660 Her rebrightening! The SU UMa-type dwarf nova V660 Her, once faded from a short outburst, has risen again! The short outburst should have been a precursor to superoutburst! Time-resolved photometry during the present (likely) main superoutburst is strongly encouraged. The combined data with the Ouda observation of the precursor would be valuable in studying the evolution from a precursor to the genuine superoutburst. YYYYMMDD(UT) mag observer 20010522.947 <153 (P. A. Dubovsky) 20010522.958 <156 (M. Reszelski) 20010523.033 <153 (G. Poyner) 20010523.953 <156 (G. Poyner) 20010523.964 <156 (M. Reszelski) 20010524.948 <156 (M. Reszelski) 20010524.965 155 (P. A. Dubovsky) 20010525.921 153 (P. A. Dubovsky) 20010525.978 147 (M. Reszelski) 20010529.964 <153 (G. Poyner) 20010530.224 <145 (M. Simonsen) 20010530.969 158: (C. P. Jones) 20010530.980 <153 (M. Reszelski) 20010531.965 144 (C. P. Jones) Rebrightening! Regards, Taichi Kato VSNET Collaboration team