Electronic Telegram No. 1399 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://www.cfa.harvard.edu/iau/cbat.html SUPERNOVA 2008cx IN NGC 309 L. A. G. Monard, Pretoria, South Africa, reports his discovery of an apparent supernova on unfiltered CCD images obtained on June 5.154 (at mag 17.7 +/- 0.4) and 7.132 (mag 17.8 +/- 0.2). The new object is located at R.A. = 0h56m45s.9, Decl. = -9o54'19".0 (equinox 2000.0), which is located on a spiral arm some 48" east and 32" north of the core of the galaxy NGC 309. Nothing is visible at this position on Digitized Sky Survey images (limiting red mag 20.5) or on Monard's image taken on May 25.153 (limiting mag 18.5). NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2008 CBAT 2008 June 7 (CBET 1399) Daniel W. E. Green