MASTER OT J193922.39+665346.0 likely superoutburst (Known SU UMa star. Short supercycle) YYYYMMDD(UT) mag observer 20230225.8624 <162c (Yutaka Maeda) 20230227.8140 <142c (Yutaka Maeda) 20230302.8611 <157c (Yutaka Maeda) 20230304.8500 151:c (Yutaka Maeda)