Electronic Telegram No. 2123 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 2009nb M. Stritzinger, Las Campanas Observatory; G. Folatelli, Universidad de Chile; and G. Pignata, Universidad Andres Bello, on behalf of the Millennium Center for Supernova Science, report that they obtained an optical spectrum of 2009nb (cf. CBET 2099) on Jan. 12.2 UT with the Gemini (+ GMOS) telescope. The spectrum reveals that the object is a type-IIP supernova around a month or more past explosion. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2010 CBAT 2010 January 13 (CBET 2123) Daniel W. E. Green