CCD magnitude estimates by VSOLJ members object YYYYMMDD(UT) mag code ASASSN-17pn 20171216.704 15.57C Kis.VSOLJ ASASSN-17pn 20171217.805 15.62C Kis.VSOLJ Observer: Seiichiro Kiyota (Chiba, Japan) Instruments: 25cmSCT + Apogee Alta F47