Electronic Telegram No. 4007 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 COMET C/2014 U3 (KOWALSKI) R. A. Kowalski reports his discovery of a comet with a circular coma approximately 15" in diameter surrounding a diffuse core as seen in four co-added 30-s CCD exposures taken with the Catalina Sky Survey's 0.68-m Schmidt telescope (discovery observations tabulated below). 2014 UT R.A. (2000) Decl. Mag. Observer Oct. 26.41191 8 49 36.16 +46 22 10.2 19.6 Kowalski 26.44422 8 49 33.60 +46 22 59.8 18.4 " 26.48487 8 49 30.33 +46 23 58.5 18.7 " 26.49359 8 49 29.46 +46 24 10.0 18.7 " 26.50231 8 49 28.84 +46 24 23.1 18.7 " 26.51106 8 49 28.20 +46 24 35.7 18.7 " After the object was posted on the Minor Planet Center's NEOCP webpage, K. Sarneczky (Konkoly Observatory) and P. Szekely (University of Szeged) report that the object shows a 20" fan-shaped coma with total magnitude 18.2 as measured within a circular aperture of radius 10" from three stacked 90-s unfiltered images taken the 0.60-m Schmidt telescope at Piszkesteto, Hungary, on Oct. 27.17 UT. The available astrometry, the following preliminary parabolic orbital elements by G. V. Williams, and an ephemeris appear on MPEC 2014-U98. T = 2014 July 15.1145 TT Peri. = 270.8217 Node = 139.8084 2000.0 q = 0.241821 AU Incl. = 148.8525 NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2014 CBAT 2014 October 27 (CBET 4007) Daniel W. E. Green