Hanjie Tan (Institute of Astronomy, National Central University), Mi Zhang, Guoyou Sun, Jingyuan Zhao (Xingming Observatory), Quanzhi Ye , Xing Gao (Xingming Observatory), report ~4 mag outburst in a known variable star ( 17.63 r ) which is 21.91 rmag in Pan-STARRS DR1 catalogue. The transient was discovered on several 120-s survey images ( limiting mag about 19.0 ) taken by Xing Gao at Xingming Observatory #3 ( N88 ) around Mar. 02.78204, 2021 UT using a unfiltered CCD ( 0.3-m f/3.6 reflector ). Images can be found at: http://xjltp.china-vo.org/xm58ht.html
XM58HT C2021 03 02.78204 06 52 22.26 +33 24 51.1 17.63 r N88
*Known VS MASTER OT J065222.27+332451.9
