HW Boo superoutburst YYYYMMDD(UT) mag observer 20220307.7036 <146c (Yutaka Maeda) 20220308.065 <153 (Gary Poyner) 20220308.1431 <141 (Eddy Muyllaert) 20220308.7026 136cG (Yutaka Maeda) 20220308.9701 <141 (Eddy Muyllaert) 20220309.6951 140:cG (Yutaka Maeda) 20220309.6951 140:cG (Yutaka Maeda)