OV Dra: precursor + superoutburst (UGSU+E) YYYYMMDD(UT) mag observer 20230408.6332 <163c (Yutaka Maeda) 20230409.6481 159:c (Yutaka Maeda) 20230409.8030 16.11C (Masayuki Moriyama) 20230410.6308 <154c (Yutaka Maeda) 20230412.7939 <160C (Masayuki Moriyama) 20230415.6977 <148c (Yutaka Maeda) 20230417.6310 154:cG (Yutaka Maeda)