MM Sco: refined superhump period Dear Colleagues, Berto Monard has kindly sent the second-night observation of MM Sco. Although the amplitude had become slightly smaller (an effect of the combined light?), superhumps are still clearly present. This observation finally confirms the SU UMa-type nature of MM Sco! The best superhump period is 0.06131(6) d, making MM Sco a member of relatively short-period systems. Further observations are strongly encouraged. The astrometric analysis of the outburst image is keenly in progress at Yamaoka-san. A representative image from Berto Monard is put on the VSNET MM Sco page. http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/mmsco.html Regards, Taichi Kato VSNET Collaboration team