Hanjie Tan, Guoyou Sun, Mi Zhang, Jingyuan Zhao, Jiangao Ruan, Xing Gao (Xingming Observatory), report ~4 mag outburst in a known variable star ( 14.92 r ) which is 18.81 rmag in Pan-STARRS DR1 catalogue. The transient was discovered on several 120-s survey images ( limiting mag about 18.0 ) taken by Xing Gao at Xingming Observatory #3 ( N88 ) around Feb. 10.55985, 2021 UT using a unfiltered CCD ( 0.3-m f/3.6 reflector ). Images can be found at: http://xjltp.china-vo.org/xm52ht.html
XM52HT C2021 02 10.55985 06 15 43.82 +28 35 08.2 14.92 r N88
XM52HT C2021 02 10.57700 06 15 43.83 +28 35 07.2 14.67 r N88
*Known VS KR Aur
