Electronic Telegram No. 2546 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 SUPERNOVA 2010js IN UGC 4294 T. Boles, Coddenham, England, reports the discovery of an apparent supernova (mag 18.1) on unfiltered CCD images taken on Nov. 7.075 UT with a 0.35-m reflector. The new object is located at R.A. = 8h16m49s.66, Decl. = +60o29'46".1 (equinox 2000.0), which is approximately 2".6 east and 11".2 north of the center of UGC 4294. Boles also measured position end figures 49s.63, 45".8 and magnitude V = 18.3 on Nov. 9.544 using an image (limiting mag 20.0) taken with the 0.61-m Cassegrain reflector at the Sierra Stars Observatory (Alpine County, California). Nothing is present at this position on Boles's images from 2010 Jan. 17 and Mar. 4 (limiting mag 19.5) or on Digitized Sky Survey plates from 1989 Dec. 21 (limiting red mag 20.5) and 1990 Jan. 1 (limiting blue mag 21.0). NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2010 CBAT 2010 November 14 (CBET 2546) Daniel W. E. Green