CCD magnitude estimates by VSOLJ members object YYYYMMDD(UT) mag code MASTER_OT_J174305.70+231107.8 20170517.565 15.80C Mdy.VSOLJ SwiftJ1357.2-0933 20170517.565 16.77C Mdy.VSOLJ Observer: Yutaka Maeda (Nagasaki, Japan) Instruments: 35cmSCT + SBIG ST-10XME