DV UMa likely superoutburst YYYYMMDD(UT) mag observer 20230202.6352 <156c (Yutaka Maeda) 20230204.6272 <152c (Yutaka Maeda) 20230205.6435 <147c (Yutaka Maeda) 20230207.6782 <146c (Yutaka Maeda) 20230210.7280 <152c (Yutaka Maeda) 20230211.701 <178C (Mitsutaka Hiraga) 20230211.8030 <174C (Masayuki Moriyama) 20230213.994 <147 (Gary Poyner) 20230215.7107 143cG (Yutaka Maeda)