V2051 Oph possible superoutburst (Eclipsing SU UMa) YYYYMMDD(UT) mag observer 20180612.633 <147 (Hiroyuki Maehara) 20180613.619 <147 (Hiroyuki Maehara) 20180616.626 140 (Hiroyuki Maehara) 20180618.387 120 (Rod Stubbings)