Electronic Telegram No. 2389 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION CBAT Director: Daniel W. E. Green; Room 209; Dept. of Earth and Planetary Sciences; Harvard University; 20 Oxford St.; Cambridge, MA 02138; U.S.A. e-mail: cbat@iau.org; cbatiau@eps.harvard.edu URL http://www.cfa.harvard.edu/iau/cbat.html SUPERNOVA 2010gq IN PGC 1142 Further to CBET 2381, on behalf of the "La Sagra Sky Survey (LSSS)" Supernova Search Team, Filip Novoselnik reports the discovery of an apparent supernova (mag about 16.8) on three CCD images (limiting magnitude about 20.0) taken on July 21.018-21.044 UT with a 0.45-m telescope. The new object is located at R.A. = 0h17m25s.70 +/- 0s.16, Decl. = -0d58'37".7 +/- 0".4 (equinox 2000.0), which is 5".5 west and 8".2 north of the nucleus of the galaxy PGC 1142. Additional approximate magnitudes for 2010gq: 2001 Aug. 24.7, [22 (Digitized Sky Survey; infrared plate); 2010 June 19.136, 16.5 (LSSS; pre-discovery); July 23.074, V = 17.5 (LSSS). A cropped image showing 2010gq marked on the June 19 exposure is posted at the following website URL: http://img37.imageshack.us/img37/5093/sncandcrop.jpg. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2010 CBAT 2010 July 23 (CBET 2389) Daniel W. E. Green