V452 CAS 20121203.934 <18.0Rc MMA PSN J02423962+3931555 20121203.957 17.1Rc MMA #Observer: Massimiliano Martignoni (MMA) #Observatory: Stazione Astronomica Betelgeuse (B75), Magnago, Italy #Telescope: Schmidt-Cassegrain 0.25m-f/10.0 #CCD: KAF0261E