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张宓 XM42MZ = AT 2020yky * M31河外新星

Mi Zhang and Xing Gao, report the discovery of a possible nova (mag approximately 18.2) on several 300-s survey image (limiting mag about 19.0) taken by Xing Gao at Xingming Observatory #3 (N88) around Oct. 31.52638 UTC using a unfiltered CCD (+ 0.6-m f/8 Ritchey-Chretien telescope). The transient approximately located at R.A.=00h42m20.16s +41d14’28”.5 (equinox 2000.0). Which is about 272.4″ west and 100″ south of the center of the NGC224(M31). Nothing is visible at this position on archival images taken on Oct. 30.55322 (limiting mag 19.0) . Images can be found at: http://xjltp.china-vo.org/xm42mz.html

NET UCAC-4
XM42MZ C2020 10 31.52638 00 42 20.16 +41 14 28.5 18.2 V N88
XM42MZ C2020 10 31.53014 00 42 20.15 +41 14 28.4 18.3 V N88

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