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Circular No. 8914 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) CBAT@CFA.HARVARD.EDU (science) URL http://www.cfa.harvard.edu/iau/cbat.html ISSN 0081-0304 Phone 617-495-7440/7244/7444 (for emergency use only) COMET P/2007 VQ_11 (CATALINA) A slightly diffuse object found by A. Boattini on Catalina images taken on 2008 Feb. 1.1 UT was posted on the Minor Planet Center's 'NEOCP' webpage. J. Young (Table Mountain 0.61-m Cassegrain reflector) confirmed the object on CCD images from Feb. 1.2 UT as having a very diffuse, round, 8" coma with no tail visible in fair seeing with light cirrus clouds. T. Spahr then identified this object with several observations from 2007 Nov. and Dec., including an apparently asteroidal object discovered by the Catalina Sky Survey on Nov. 3 (discovery observation tabulated below) that had been designated 2007 VQ_11 after being linked to observations made on Nov. 6 at the Xu-Yi station of Purple Mountain Observatory (cf. MPS 225184). 2007 UT R.A. (2000) Decl. Mag. Nov. 3.42085 4 11 40.45 + 3 21 51.5 18.8 The new astrometry, the following orbital elements, and an ephemeris appear on MPEC 2008-C02. Epoch = 2008 Feb. 24.0 TT T = 2008 Feb. 13.5568 TT Peri. = 277.6529 e = 0.502035 Node = 164.0574 2000.0 q = 2.693808 AU Incl. = 12.3249 a = 5.409639 AU n = 0.0783342 P = 12.582 years COMETS C/2007 U5 AND C/2007 U6 (SOHO) Further to IAUC 8912, additional Kreutz-sungrazing comets have been found on SOHO website images, as tabulated below. C/2007 U5 appeared stellar (mag about 7.5) in C3 images, and was slightly diffuse with no tail in C2 images. C/2007 U6 was very faint (mag about 8) and quite diffuse. Comet 2007 UT R.A.(2000)Decl. Inst. F MPEC C/2007 U5 Oct. 24.488 13 45.8 -13 04 C3/2 MU 2008-A51 C/2007 U6 24.729 13 49.2 -12 55 C2 AK 2008-A51 COMET 17P/HOLMES Corrigendum. Regarding the gas-expansion velocity reported on IAUC 8891, the correct value is about 1.0 km/s, further confirmed using the CS(3-2) line. (C) Copyright 2008 CBAT 2008 February 1 (8914) Daniel W. E. Green
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