HO Del indeed superoutburst YYYYMMDD(UT) mag observer 20170728.722 <159V (Masayuki Moriyama) 20170728.935 <144 (Jose Ripero) 20170730.444 14.75V (ASAS-SN survey) 20170730.622 <144 (Hiroyuki Maehara) 20170731.556 140 (Rod Stubbings) 20170801.933 <138 (Jose Ripero) 20170802.676 141 (Hiroyuki Maehara)