Hanjie Tan, Guoyou Sun, Mi Zhang, Xing Gao (Xingming Observatory), report ~1.5 mag outburst in a known variable star ( 16.6 r ) which is 18.11 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 Jan. 11.67872, 2021 UT using a unfiltered CCD ( 0.3-m f/3.6 reflector ). Images can be found at: http://xjltp.china-vo.org/xm35ht.html
XM35HT C2021 01 11.67872 03 21 00.26 +18 54 16.8 16.6 r N88
*Known VS ATO J050.2503+18.9052
