Circular No. 6886

Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions) BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science) URL http://cfa-www.harvard.edu/iau/cbat.html Phone 617-495-7244/7440/7444 (for emergency use only)

SUPERNOVA 1998bn IN NGC 4462

W. D. Li, M. Modjaz, R. R. Treffers, and A. V. Filippenko, University of California at Berkeley, report the discovery of an apparent supernova during the course of the Lick Observatory Supernova Search (cf. IAUC 6627) with the 0.8-m Katzman Automatic Imaging Telescope. SN 1998bn was found and confirmed on unfiltered CCD images obtained on Apr. 17.3 (mag about 17.4) and 27.3 UT (mag about 13.7), respectively. The object is located at R.A. = 12h29m18s.88, Decl. = -23o09'49".2 (equinox 2000.0), which is about 32".3 west and 9".7 north of the nucleus of NGC 4462. The new star already appeared in the template image obtained on Apr. 17.3, and brightened about 3.7 mag in 10 days. The Digital Sky Survey does not show any star at the position of SN 1998bn.

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Host galaxy info: V = 1792 km/s, 3.2'x1.2', SB(r)ab

SN type info: SN Ia

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