Electronic Telegram No. 2600 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION CBAT Director: Daniel W. E. Green; Hoffman Lab 209; Harvard University; 20 Oxford St.; Cambridge, MA 02138; U.S.A. e-mail: cbatiau@eps.harvard.edu (alternate cbat@iau.org) URL http://www.cbat.eps.harvard.edu/index.html Prepared using the Tamkin Foundation Computer Network POSSIBLE SUPERNOVA IN NGC 5430 Further to their report on CBET 2486, Guoyou Sun and Xing Gao report the following additional magnitudes for this possible supernova: Oct. 10.572 UT, 17.2; 11.572, 17.1; Nov. 12.967, 17.9; 13.982, 18.1; 26.941, 18.4; Dec. 13.922, 18.8. Sun and Gao have posted their images at the following website URL: http://www.lababuy.com/XOSS/XM10AD/XM10AD.htm. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2010 CBAT 2010 December 21 (CBET 2600) Daniel W. E. Green