Mi Zhang and Xing Gao, report the outburst of a variable star candidate (mag approximately 17.8) was discovered on several 120-s survey images (limiting mag about 20.0) taken by Xing Gao at Xingming Observatory #2 (N89) around Oct. 16.77961 UT using a unfiltered CCD ( 0.5-m f/4 reflector ). The transient approximately located at R.A.=23h37m52.41s +52d27’20”.6 (equinox 2000.0). Nothing is visible at this position on archival images taken on Oct. 16.74685 (limiting mag 20.0) . Images can be found at: http://xjltp.china-vo.org/xm40mz.html
NET Gaia DR2
XM40MZ C2020 10 16.74685 23 37 52.41 +52 27 20.6 >20.0 G N89
XM40MZ C2020 10 16.77961 23 37 52.41 +52 27 20.6 17.8 G N89
XM40MZ C2020 10 17.73096 23 37 52.40 +52 27 20.3 19.4 G N88
XM40MZ C2020 10 17.73470 23 37 52.40 +52 27 20.6 19.3 G N88
 |
 |
 |
| Discovery image taken by N89 on Oct. 16.77961 UTC,2020 | Archival image taken by N89 on Oct. 16.74685 UTC,2020 | PS image |