KIS J192651.94+503301.7: fifth rebrightening YYYYMMDD(UT) mag observer 20181209.7806 <139 (Eddy Muyllaert) 20181212.5332 <145C (Masayuki Moriyama) 20181212.7694 <139 (Eddy Muyllaert) 20181214.5329 153C (Masayuki Moriyama)