2010CBET.2574....2R

Jiangao Ruan, Fangchenggang, Guangxi, China; and Xing Gao, Urumqi, Xinjiang, China, report their independent discovery of M31N 2010-12a at mag approximately 16.3 on two unfiltered 60-s survey CCD images (limiting mag about 19.5) taken by Xing Gao in the course of the Xingming Observatory Sky Survey around Dec. 1.5205 UT using a Celestron C14 Schmidt-Cassegrain telescope at Mt. Nanshan; they provide position end figures 24s.37 ± 0s.01, 03".5 ± 0".2. Additional magnitudes for M31N 2010-12a from Ruan and Gao: 1993 Oct. 21, [20.8 (Palomar Sky Survey, red N plate); 2010 Nov. 28, [19.5; 29, [19.5; Dec. 1.543, 16.1; 4.554, 16.0; 5.517, 16.0; 6.532, 16.2; 17.524, 16.3. Ruan and Gao have posted their images at website URL http://www.xjltp.com/XOSS/XM02JR/XM02JR.htm.