Electronic Telegram No. 2553 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 2010jq G. Folatelli, IPMU, University of Tokyo; J. Anderson, Universidad de Chile; and G. Pignata, Universidad Andres Bello, on behalf of the Millennium Center for Supernova Science, report on an optical spectrogram (range 355-896 nm) of 2010jq (cf. CBET 2544) obtained on Nov. 17.29 UT with the SOAR telescope (+ Goodman HTS). The spectrum shows 2010jq to be an evolved type-Ia supernova, between two and three months after maximum light. Cross-correlation with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) provides good matches with spectra of SN 2003du at +72 and +84 days. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2010 CBAT 2010 November 18 (CBET 2553) Daniel W. E. Green