Mi Zhang, Xing Gao (Xingming Observatory), report the discovery of a possible nova (mag approximately 20.1) on several 300-s survey image (limiting mag about 20.5) taken by Xing Gao at Xingming Observatory #3 (N88) around July. 24.90322 UTC using a unfiltered CCD (+ 0.6-m f/8 Ritchey-Chretien telescope). The transient approximately located at R.A.=00h42m00.58s +41d08’48”.3 (equinox 2000.0). Which is about 493.2″ west and 440.2″ south of the center of the NGC224(M31). Nothing is visible at this position on archival images taken on July. 17.81882 (limiting mag 20.5) . Images can be found at: http://xjltp.china-vo.org/xm57mz.html
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| Discovery image taken by N89 on July. 24.90322 UTC,2021 | Archival image taken by N89 on July. 17.81882 UTC,2021 | Follow-up image taken by N88 on Aug. 11.92284 UT,2021 | PS Image |