CCD magnitude estimates by VSOLJ members object YYYYMMDD(UT) mag code ASASSN-17cj 20170219.401 <16.85C Ioh.VSOLJ ASASSN-17ck 20170219.510 <16.00C Ioh.VSOLJ ASASSN-17cn 20170219.596 14.25C Ioh.VSOLJ Observer: Hiroshi Itoh (Tokyo, Japan) Instruments: 20cmSCT + ATIK 414EX