SDSS J113551.09+532246.2 superoutburst YYYYMMDD(UT) mag observer 20210203.6806 <154c (Yutaka Maeda) 20210220.6590 154:c (Yutaka Maeda) 20210221.3298 15.216zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210221.4100 14.949zg (Zwicky Transient Facility Lasair (Masci+ 2019))