QY Per updated superhump period From 2843 observations (received up to now) between Dec. 29.874 and Jan. 2.115, the best (average) superhump period of QY Per has been determined to be 0.07855 day. This period analysis may have been affected by the period change (usually decreasing), which will be exactly determined using future observations. Regards, Taichi Kato, Makoto Uemura, Gianluca Masi, Lew Cook, Katsura Matsumoto, Lasse Teist Jensen, Alessia Cassetti : The VSNET QY Per collaboration team