Electronic Telegram No. 583 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 2006du IN IC 1529 P. Luckas, Perth, W. Australia; O. Trondal, Oslo, Norway; and M. Schwartz, Patagonia, AZ, report the discovery of an apparent supernova on unfiltered CCD frames taken with the 0.35-m telescope at Perth on July 18.9 (at mag 17.0) and 22.9 UT (mag 16.7) in the course of the Tenagra Observatory Supernova Search. SN 2006du is located at R.A. = 0h05m12s.26, Decl. = -11o29'23".6 (equinox 2000.0), which is 13".2 west and 45".6 north of the center of IC 1529 (which itself has position end figures 13s.25, 9".2). Nothing was visible at the position of 2006du on an image taken by Luckas on June 10.8 (limiting magnitude about 18.0) or on a Digitized Sky Survey image from 1983 Oct. 1 (limiting mag 21.0). NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2006 CBAT 2006 July 23 (CBET 583) Daniel W. E. Green