QY Per: refined superhump period Based on the data between Dec. 29 and 31, the best superhump period of QY Per has been determined as 0.0789 d. The data used for analysis are UT points Dec. 29-30 251 Gianluca Masi 30 65 Lew Cook 30 840 Kyoto team 30-31 312 Gianluca Masi 31 207 Lew Cook The Kyoto Dec. 29 data have been excluded from this analysis because they covered the initial growing stage of superhumps. (It has become evident the early part of the Kyoto Dec. 29 data reflects the rapid decline stage from the superoutburst peak). The value will be updated when the ongoing analysis of the early part of Dec. 30 (Masi) and Dec. 31 (Kyoto) becomes available. Good luck to all! Regards, Taichi Kato, Makoto Uemura, Gianluca Masi, Lew Cook, Katsura Matsumoto, The VSNET QY Per collaboration team