V503 Cyg likely superoutburst YYYYMMDD(UT) mag observer 20121123.837 <149 (Gary Poyner) 20121201.758 <142 (Jose Ripero) 20121201.842 <155 (Gary Poyner) 20121202.791 <142 (Jose Ripero) 20121205.824 148 (Gary Poyner) 20121208.768 138 (Jose Ripero)