Electronic Telegram No. 1663 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 2009K IN NGC 1620 G. Pignata, J. Maza, M. Hamuy, R. Antezana, L. Gonzalez, P. Gonzalez, P. Lopez, S. Silva, G. Folatelli, D. Iturra, R. Cartier, F. Forster, and S. Marchi, Universidad de Chile; B. Conuel, Wesleyan University; and D. Reichart, K. Ivarsen, A. Crain, D. Foster, M. Nysewander, and A. LaCluyze, University of North Carolina at Chapel Hill, on behalf of the CHASE project, report the discovery of an apparent supernova (mag approximately 14.9 +/- 0.1) on a "Luminance"-filtered image taken on Jan. 14.07 UT with the 0.41-m 'PROMPT 2' telescope located at Cerro Tololo. The new object, which was confirmed in a similar image taken on Jan. 15.06 at mag approximately 15.0 +/- 0.1, is located at R.A. = 4h36m36s.77 +/- 0".1, Decl. = -0o08'35".6 +/- 0".1 (equinox 2000), which is about 8".7 west and 1".5 north of the center of the galaxy NGC 1620. Nothing is visible at this position on archival images taken on 2008 Dec. 18.14 and 2009 Jan. 11.08 (limiting mag 18.0). NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2009 CBAT 2009 January 15 (CBET 1663) Daniel W. E. Green