Hanjie Tan, Guoyou Sun, Mi Zhang, Jingyuan Zhao, Xing Gao (Xingming Observatory), report ~5.2 mag outburst in a variable star candidate (15.37 r) which is 19.88 rmag in Pan-STARRS DR1 catalogue (PS1 objID 173943196915889805). 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 Mar. 04.94506, 2021 UT using a unfiltered CCD (0.3-m f/3.6 reflector). Images can be found at: http://xjltp.china-vo.org/xm59ht.html
XM59HT C2021 03 04.94506 21 18 46.00 +54 57 27.6 15.37 r N88
XM59HT C2021 03 04.96197 21 18 46.00 +54 57 27.4 15.42 r N88
