Circular No. 7900 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 MPEC 2002-J54 provides 109 observations of 11 new outer satellites of Jupiter. Following the communication to the Minor Planet Center by S. S. Sheppard and D. C. Jewitt, University of Hawaii, and J. Kleyna, University of Cambridge, of CCD observations with the 3.6-m Canada-France-Hawaii and 2.2-m University of Hawaii telescopes on pairs of nights in Dec. 2001 (Dec. 9-11 and 17-19), B. G. Marsden considered these 11 objects (in the mag range R = 22.2-23.5) likely to be satellites and provided ephemerides that allowed Sheppard's measurement of further images on 2002 Jan. 8, as well as generally on another night during Jan. 9-16 and, with the help also of orbit calculations by R. Jacobson, Jet Propulsion Laboratory, during Feb. 10-11. In two cases Sheppard identified and measured images on Mar. 12. Marsden's final perturbed orbit solutions (epoch 2002 May 6.0 TT), also given on MPEC 2002-J54, show all the satellites, designated S/2001 J~1-J 11, to have retrograde orbits (140 deg < i < 166 deg to the 2000.0 ecliptic) with P in the range 557-773 days and H from 15.4 to 16.8.
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