2010CBET.2486....1S

Guoyou Sun, Wenzhou, Zhejiang, China; and Xing Gao, Urumqi, Xinjiang, China, report the discovery of a possible supernova (mag approximately 17.2) on 60-s survey images (limiting mag about 19) taken by Xing Gao in the course of the Xingming Observation Sky Survey at Mt. Nanshan around Oct. 3.605 UT using an unfiltered CCD camera with a Celestron C14 Schmidt-Cassegrain telescope. The new object is located at R.A. = 14:00:47.12 ± 0s.12, Decl. = +59:20:17.0 ± 0".2 (equinox 2000.0; measured by Sun), which is 13".7 west and 33".5 north of the nucleus of NGC 5430. Nothing is visible at this position on a Digitized Sky Survey image from 1997 Apr. 8 (limiting mag about 19.5; no bandpass stated). Additional magnitudes for the variable provided by Sun: Oct. 4.578, 17.2; 5.588, 16.9; 6.584, 16.7.