VW CrB superoutburst YYYYMMDD(UT) mag observer 20180608.739 <168c (Mitsutaka Hiraga) 20180609.460 <132 (Tsuneo Horie) 20180609.601 142 (Hiroyuki Maehara) 20180609.8944 <141 (Jose Ripero) 20180610.983 145 (Gary Poyner)