CCD magnitude estimates by VSOLJ members object YYYYMMDD(UT) mag code ASASSN-17pm 20171219.564 15.48C Ioh.VSOLJ ASASSN-17pm 20171223.565 15.42C Ioh.VSOLJ Observer: Hiroshi Itoh (Tokyo, Japan) Instruments: 30cmSCT + SBIG ST-9XE