V452 Cas superoutburst YYYYMMDD(UT) mag observer 20130109.788 <177C (Ian Miller) 20130110.962 <177C (Ian Miller) 20130111.772 159C (Jeremy Shears) 20130111.812 156 (Gary Poyner) 20130112.980 15.92C (Eddy Muyllaert) 20130113.014 15.749V (Ian Miller)