Electronic Telegram No. 148 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions) CBAT@CFA.HARVARD.EDU (science) URL http://cfa-www.harvard.edu/iau/cbat.html SUPERNOVA 2005bx IN MCG +12-13-19 D. Rich, Hampden, ME, reports his discovery of an apparent supernova (mag about 17.8) on unfiltered CCD frames taken with a 0.31-m reflector on Apr. 27.10 and 30.08 UT. The new object is located at R.A = 13h50m24s.95, Decl. = +68o33'19".4 (equinox 2000.0), which is about 1".5 west and 2".4 north of the center of MCG +12-13-19. Nothing is visible at this location on CCD frames taken by Rich on Feb. 28.20 and Apr. 11.08 (limiting mag about 18.6) or on Palomar Digital Sky Survey images from 1993 and 1996 (limiting red and blue magnitudes fainter than 19.0). NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the formal IAU Circulars. (C) Copyright 2005 CBAT 2005 April 30 (CBET 148) Daniel W. E. Green