Zhangwei Jin(Ningbo, Zhejiang, China) and Xing Gao (Urumqi, Xinjiang, China), report the discovery of a possible supernova (mag approximately 17.3) on a 60-s survey image (limiting mag about 19.0)taken by Xing Gao in Xingming Observation Sky Survey(C42) around Feb. 18.92222 UT,2011. using a unfilled CCD ( + Celestron C14 Schmidt-Cassegrain telescope D=350-mm @f/6.9 ).the new object approximately located at R.A. =16h 50m 13s.98 Decl.=+55<22'28".0 (equinox 2000.0). which is 0.6" west and 37" South from the center of the galaxy NGC 6246A. We also find the object at the same position taken by C42 on Feb.16 at 17.7mag. Nothing is visible at this position on archival images taken on Jan. 27 (limiting mag 19.5) or on the DSS from Jun 29,1992(limiting mag about 19.5).

XM18ZJ C2011 02 16.92404 16 50 13.97 +55 22 28.0 17.7 V C42
XM18ZJ C2011 02 18.92222 16 50 13.98 +55 22 28.0 17.3 V C42

All images can be seen from: http://www.xjltp.com/XOSS/XM18ZJ/XM18ZJ.htm

C42 Xingming Observatory, Mt. Nanshan. Observers Z.Jin, X.Gao ,Measurers Z.Jin 0.35-m f/6.9 Schmidt-Cassegrain telescope and CCD.



    Discovery image taken by C42 on Feb. 18.92222 and Feb. 16.92404LM=19.0,60S                     




  archival images taken on Jan.27