Electronic Telegram No. 192 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 2005df IN NGC 1559 R. Evans, Hazelbrook, New South Wales, reports his visual discovery of an apparent supernova (mag about 13.8) with a 0.31-m reflector on Aug. 4.625 UT. The new object, which is about 15" east and 40" north of the center of NGC 1559, was not visible on July 29.6 (limiting mag 15.0), and nothing appears at this location to mag about 19 on the European Southern Observatory 'B' Survey or on an image of the galaxy in Wassilieff's CCD Atlas. Evans also found SNe 1984J and 1986L in NGC 1559. A. Gilmore, Mount John Observatory, reports confirmation of the new object at R = 13.7 on a 10-s CCD image taken with the 0.6-m f/6.4 reflector on Aug. 5.44, providing the following precise position for SN 2005df: R.A. = 4h17m37s.85, Decl. = -62o46'09".5 (equinox 2000.0). He adds that the Digital Sky Survey image of the galaxy shows no star near that position. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the formal IAU Circulars. (C) Copyright 2005 CBAT 2005 August 5 (CBET 192) Daniel W. E. Green