MM Hya superoutburst YYYYMMDD(UT) mag observer 20180420.5775 <159C (Masayuki Moriyama) 20180504.487 139 (Hiroyuki Maehara) 20180504.5811 137C (Masayuki Moriyama) 20180505.403 136 (Rod Stubbings) 20180508.421 136 (Rod Stubbings)