ASASSN-19yg possible superoutburst First superoutburst since 2019 Oct. YYYYMMDD(UT) mag observer 20210622.7957 <148c (Yutaka Maeda) 20210628.8036 <146c (Yutaka Maeda) 20210708.3873 14.384zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210709.3875 14.171zg (Zwicky Transient Facility Lasair (Masci+ 2019))