2020年3月17日，通过星明天文台PSP系统发现一颗超新星候选体，内部编号XMPGS1，亮度17.7V。发现者孙国佑，高兴。
3月18日，丽江2.4米望远镜拍光谱确认，这是一颗Ia 91T/99aa-like型超新星。也就是Ia 91T-like的一个亚型，原型为SN 1999aa。
PSN J16350676+4612538
http://www.cbat.eps.harvard.edu/unconf/followups/J16350676+4612538.html
AT 2020enm
https://www.wis-tns.org/search?name=2020enm
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2020年3月17日，通过星明天文台PSP系统发现一颗超新星候选体，内部编号XMPGS1，亮度17.7V。发现者孙国佑，高兴。报告如下：
POSSIBLE SUPERNOVA IN IC1222
Guoyou Sun and Xing Gao, report the discovery of a possible supernova (mag approximately 17.7) on several 40-s survey images (limiting mag about 19.0) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Mar. 16.91339 UT using a unfiltered CCD ( + Celestron C14 Schmidt-Cassegrain telescope D=356-mm @f/6.9 ). The transient approximately located at R.A.=16h35m06.76s +46d12’53”.8 (equinox 2000.0). Which is about 25.2″ west and 3.7″ north of the center of the IC1222. Nothing is visible at this position on archival images taken on Sep. 20.63730 UT, 2019(limiting mag 19.0).
NET UCAC-4
XMPGS1 C2020 03 16.91339 16 35 06.76 +46 12 53.8 17.7 V C42
All images can be seen from: http://xjltp.china-vo.org/XMPGS1.html
C42, Xingming Observatory, Mt. Nanshan. Observers Guoyou Sun and Xing Gao Measurer G.Sun 0.36-m f/6.9 Schmidt-Cassegrain telescope and CCD.
