CCD magnitude estimates by VSOLJ members object YYYYMMDD(UT) mag code ASASSN-18abj 20181220.542 12.42V Ioh.VSOLJ ERIIM 20181220.464 11.68V Ioh.VSOLJ Observer: Hiroshi Itoh (Tokyo, Japan) Instruments: 12.7cmSCT + ATIK 414EX