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Circular No. 8116 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://cfa-www.harvard.edu/iau/cbat.html ISSN 0081-0304 Phone 617-495-7440/7244/7444 (for emergency use only) SATELLITES OF JUPITER AND SATURN Further to IAUC 8089, S. S. Sheppard reports the discovery of three new satellites of Jupiter (S/2003 J 13, 14, and 15) and one new satellite of Saturn (S/2003 S 1), and B. Gladman (University of British Columbia) reports the discovery of three new satellites of Jupiter (S/2003 J 16, 17, and 18) -- all from images obtained at Mauna Kea. Preliminary orbital elements for each object by B. G. Marsden appear on the MPEC references cited, as follows: S/2003 J 13, e = 0.41, i = 141 deg, P = 738 days, 2003-G09; S/2003 J 14, e = 0.22, i = 141 deg, P = 806 days, 2003-G10; S/2003 J 15, e = 0.11, i = 141 deg, P = 667 days, 2003-G17; S/2003 J 16, e = 0.27, i = 149 deg, P = 597 days, 2003-G18; S/2003 J 17, e = 0.19, i = 164 deg, P = 690 days, 2003-G19; S/2003 J 18, e = 0.12, i = 146 deg, P = 608 days, 2003-G20; S/2003 S 1, e = 0.33, i = 136 deg, P = 989 days, 2003-G39. The Jupiter satellites have absolute magnitudes in the range H = 16.2-16.8; S/2003 S1 has H = 14.6. COMET C/2003 G2 (LINEAR) L. Manguso, Lincoln Laboratory, Massachusetts Institute of Technology, reports the LINEAR discovery of a comet with a 13" coma visible on Apr. 9-10 (discovery observation below). Following posting on the NEO Confirmation Page, the object was also reported to have cometary appearance by G. Hug (Eskridge, KS, 0.3-m reflector; diffuse with m_1 = 16.6 on Apr. 9.4 UT and m_1 = 17.3 on Apr. 10.4) and by A. C. Gilmore and P. M. Kilmartin (Mt. John University Observatory, 0.6-m reflector; diffuse on Apr. 11.6). 2003 UT R.A. (2000) Decl. m2 Apr. 8.37712 14 33 50.98 - 2 22 32.0 18.2 The available astrometry, the following preliminary parabolic orbital elements, and an ephemeris appear on MPEC 2003-G62. T = 2003 Apr. 29.927 TT Peri. = 190.680 Node = 24.568 2000.0 q = 1.55370 AU Incl. = 96.202 (C) Copyright 2003 CBAT 2003 April 11 (8116) Daniel W. E. Green
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