Hanjie Tan (Astronomical Institute of Charles University), Mi Zhang, Guoyou Sun, Jingyuan Zhao (Xingming Observatory), Quanzhi Ye , Xing Gao (Xingming Observatory), report a variable star candidate (G=16.89+-0.11). The source appears to correspond to object Gaia DR2 2007640754105893632 (G=20.82) in the Gaia DR2. Discovery was made on several 120-s survey images (limiting mag about 19.5) taken by Xing Gao at Xingming Observatory #3 (N88) around Oct. 18.79870, 2021 UT using a unfiltered CCD (0.3-m f/3.6 reflector). Images can be found at: http://xjltp.china-vo.org/xm79ht.html
XM79HT C2021 10 18.79870 22 32 53.14 +57 00 06.4 16.89+-0.11 G N88
XM79HT C2021 10 18.81579 22 32 53.17 +57 00 06.7 16.76+-0.10 G N88
