Mi Zhang and Xing Gao, report the discovery of a possible nova (mag approximately 18.7) on several 300-s survey image (limiting mag about 19.5) taken by Xing Gao at Xingming Observatory #3 (N88) around Nov. 01.57683 UTC using a unfiltered CCD (+ 0.6-m f/8 Ritchey-Chretien telescope). The transient approximately located at R.A.=00h42m46.77s +41d07’03”.1 (equinox 2000.0). Which is about 27.6″ east and 545.4″ south of the center of the NGC224(M31). Nothing is visible at this position on archival images taken on Oct. 31.53014 (limiting mag 19.0) . Images can be found at: http://xjltp.china-vo.org/xm43mz.html
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| Discovery image taken by N88 on Nov. 01.57683 UTC,2020 | Archival image taken by N88 on Oct. 31.53014 UTC,2020 | PS Image |
| AT 2020ypu (= XM43MZ) (= PNV J00424677+4107031) | |||
| JDHEL Gmag. 2459155.082 18.63 2459155.085 18.63 2459156.064 17.61 2459156.067 17.56 2459157.082 17.46 2459157.086 17.47 2459160.035 18.12 2459160.039 18.10 2459160.403 18.14 2459161.022 18.03 2459161.025 18.01 2459161.333 18.02 2459161.337 18.03 |
JDHEL Vmag. 2459156.09 17.61 2459157.104 17.38 2459157.108 17.49 2459157.112 17.43 2459157.121 17.43 2459157.125 17.47 2459159.126 18.22 2459159.13 18.28 2459161.31 18.41 2459161.322 18.35 |
JDHEL Rmag. 2459155.155 18.42 2459156.099 17.49 2459157.105 17.22 2459157.11 17.21 2459157.114 17.27 2459157.118 17.28 2459157.122 17.29 2459157.126 17.22 2459159.127 17.86 2459161.303 17.85 2459161.314 17.85 2459161.326 17.85 |
JDHEL Imag. 2459157.107 17.15 2459157.119 17.13 2459157.123 17.15 2459159.124 17.40 2459159.128 17.49 2459161.307 17.29 2459161.318 17.25 2459161.329 17.28 |