Hanjie Tan, Guoyou Sun, Mi Zhang, Jingyuan Zhao, Xing Gao (Xingming Observatory), report ~8 mag outburst in a nova or CV candidate (12.98 r) which is 20.84 rmag in Pan-STARRS DR1 catalogue (PS1 objID 145271551490014744)，also corresponds to a QSO candidate. 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. 05.90946, 2021 UT using a unfiltered CCD (0.3-m f/3.6 reflector). Images can be found at: http://xjltp.china-vo.org/xm51ht.html
XM51HT C2021 02 05.90946 10 20 35.79 +31 03 42.4 12.98 r N88
XM51HT C2021 02 05.92637 10 20 35.79 +31 03 42.4 12.95 r N88
By Xingming Observatory #2 :
2021 02 06.57372(13:46:09 UT) 12.61 B
2021 02 06.57632(13:49:57 UT) 12.60 B
2021 02 06.57896(13:53:42 UT) 12.65 V
2021 02 06.58155(13:57:26 UT) 16.67 V
2021 02 06.58424(14:01:18 UT) 12.57 g’
2021 02 06.58686(14:05:05 UT) 12.58 g’
2021 02 06.58951(14:08:54 UT) 12.94 r’
2021 02 06.59211(14:12:38 UT) 12.96 r’
2021 02 06.59473(14:16:25 UT) 13.18 i’
2021 02 06.59729(14:20:06 UT) 13.17 i’
2021 02 06.60009(14:24:08 UT) 14.51 z’
2021 02 06.60270(14:27:53 UT) 14.51 z’
2021 02 06.92932(22:18:13 UT) 12.67 B
2021 02 06.93094(22:20:33 UT) 12.67 B
2021 02 06.93262(22:22:58 UT) 12.77 V
2021 02 06.93424(22:25:18 UT) 16.76 V
2021 02 06.93593(22:27:44 UT) 12.66 g’
2021 02 06.93756(22:30:05 UT) 12.67 g’
2021 02 06.93924(22:32:30 UT) 13.04 r’
2021 02 06.94088(22:34:52 UT) 13.05 r’
2021 02 06.94256(22:37:17 UT) 13.28 i’
2021 02 06.94418(22:39:37 UT) 13.28 i’
2021 02 06.94582(22:41:59 UT) 14.61 z’
2021 02 06.94742(22:44:17 UT) 14.61 z’