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张宓 XM66MZ = AT 2022dbn = PNV J09553464+6901207 ? M81河外新星

Mi Zhang, Leiming Tang, Jiangao Ruan, Xing Gao (Xingming Obs), report the discovery of a possible nova at 20.3 CV on several 300-s survey images (limiting mag about 21.0 CV) taken by Xing Gao at Xingming Observatory “#”3 (N88) around Feb. 23.59066, 2022 UT using a unfiltered CCD (+ 0.6-m f/8 Ritchey-Chretien telescope). The transient approximately located at RA= 09h55m34.64s, DEC = +69d01m20.7s (equinox 2000.0). Which is about 7.9″ east and 154.4″ south of the center of the M81. Nothing is visible at this position on archival images taken on Feb. 22.60056, 2022 UT (limiting mag 21.0 CV). Images can be found at: http://xjltp.china-vo.org/xm66mz.html

XM66MZ C2022 02 23.59066 09 55 34.64 +69 01 20.7 20.25V N88
XM66MZ C2022 02 23.59440 09 55 34.62 +69 01 20.7 20.35V N88
XM66MZ C2022 02 23.59875 09 55 34.70 +69 01 20.2 20.17V N88
XM66MZ C2022 02 24.72951 09 55 34.65 +69 01 20.9 20.83V N88
XM66MZ C2022 02 24.73326 09 55 34.65 +69 01 21.2 20.88V N88

Discovery image taken around Feb. 23.59066, 2022 UT at N88 Archival image taken around Feb. 22.60056, 2022 UT at N8 PS image