Shuming Wang, Jiangao Ruan, Jianlin Xu, Yanxi Li, Mi Zhang, Guoyou Sun, Wenjie Zhou, Jingyuan Zhao, Yi Ding, Xing Gao (Xingming Observatory), report the discovery of an UV candidate (18.74+-0.09G). The source appears to correspond to object Gaia EDR3 381196764340834816 (20.18 G) in the Gaia EDR3. Discovery was made on one 120-s survey image (limiting mag about 20.0) taken by Xing Gao around 2021 Nov 30.57954 UT at Xingming Observatory #2 (N89) using a unfiltered CCD (0.5-m f/4 reflector). Images can be found at: http://xjltp.china-vo.org/psp21aj.html
Follow-up observations were performed by Xing Gao at Xingming Observatory #3 (N88) around Nov. 30.74, 2021 UT using a unfiltered CCD (+ 0.6-m f/8 Ritchey-Chretien telescope). Several 300-s survey images (limiting mag about 21.5) showed that the candidate has decreased to 19.89+-0.09G, 30.73851 UT; 20.01+-0.10G, 30.74219 UT; 19.82+-0.09G, 30.74586 UT; 20.01+-0.10G, 30.74954 UT; 19.83+-0.09G, 30.75322 UT. The candidate likely to be an UV star.
NET Gaia DR2
PSP21aj C2021 11 30.57954 00 38 38.74 +40 53 37.4 18.74+-0.09G N89
PSP21aj C2021 11 30.73851 00 38 38.68 +40 53 37.2 19.89+-0.09G N88
PSP21aj C2021 11 30.74219 00 38 38.66 +40 53 37.3 20.01+-0.10G N88
PSP21aj C2021 11 30.74586 00 38 38.68 +40 53 36.9 19.82+-0.09G N88
PSP21aj C2021 11 30.74954 00 38 38.66 +40 53 37.2 20.01+-0.10G N88
PSP21aj C2021 11 30.75322 00 38 38.71 +40 53 37.4 19.83+-0.09G N88
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| Discovery image taken by N89 around 2021 Nov. 30.57954 UT | Follow-up image taken by N88 around 2021 Nov. 30.73851 UT | Archival image taken by N89 around 2021 Nov. 29.55427 UT | PS image |