V630 Cyg superoutburst YYYYMMDD(UT) mag observer 20191109.012 <149 (Gary Poyner) 20191114.4131 142cG (Yutaka Maeda) 20191115.5269 142cG (Yutaka Maeda) 20191116.462 140 (Hiroyuki Maehara) 20191116.5275 141cG (Yutaka Maeda) 20191120.540 142 (Hiroyuki Maehara)