HO Del possible superoutburst YYYYMMDD(UT) mag observer 20200531.0514 <141 (Eddy Muyllaert) 20200601.4506 18.095zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20200602.0389 <141 (Eddy Muyllaert) 20200602.7392 140cG (Yutaka Maeda)