Electronic Telegram No. 2496 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION CBAT Director: Daniel W. E. Green; Hoffman Lab 209; Harvard University; 20 Oxford St.; Cambridge, MA 02138; U.S.A. e-mail: cbatiau@eps.harvard.edu (alternate cbat@iau.org) URL http://www.cbat.eps.harvard.edu/index.html Prepared using the Tamkin Foundation Computer Network SUPERNOVA 2010ip D. Milisavljevic and R. Fesen, Dartmouth College, report that a low-dispersion optical spectrum (range 440-770 nm) of 2010ip (cf. CBET 2491) was obtained with the 2.4-m Hiltner telescope (+ Mark III) at MDM Observatory on Oct. 12.4 UT. Comparison with a library of supernova spectra using the "Supernova Identification" tool (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) suggests a normal type-Ia event around maximum light at redshift z = 0.052. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2010 CBAT 2010 October 13 (CBET 2496) Daniel W. E. Green