POSSIBLE VARIABLE STAR IN M31 – XMNGS3

Guoyou Sun and Xing Gao, report the discovery of a variable star candidate (mag approximately 18.8R) on several 300-s surveyimages (limiting mag about 20.0) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Dec.129.63536 UT using a unfiltered CCD ( + 0.6-m f/8 Ritchey-Chretien telescope ). The transient approximately located at R.A.=00h42m53.37s +41d14’26”.7(equinox 2000.0).Which is about 102.3″ east and 101.8″ south of the center of the NGC224(M31).

NET UCAC-4
XMNGS3 C2019 12 29.63536 00 42 53.37 +41 14 26.7 18.8 R C42
XMNGS3 C2019 12 30.58778 00 42 53.39 +41 14 26.7 18.7 R C42

All images can be seen from: http://xjltp.china-vo.org/XMNGS3.html

C42,Xingming Observatory – NEXT, Mt. Nanshan. Observers G.Sun,X.Gao,Measurers G.Sun, 0.6-m f/8 Ritchey-Chretien telescope and CCD.