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IAUC 8116: Sats OF JUPITER, SATURN; C/2003 G2

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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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