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IAUC 7473: S/1999 U 2

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                                                  Circular No. 7473
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)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7244/7440/7444 (for emergency use only)


S/1999 U 2
    This satellite has been recovered as follows on the basis of an
unpublished retrograde orbit solution by the undersigned replacing the
direct orbit solution on MPC 39024 and IAUC 7385:

     2000 UT             R.A. (2000) Decl.         R    Observer
     Aug.  3.17179   21 27 04.00   -15 44 08.7   23.9   Gladman
           3.20671   21 27 03.67   -15 44 10.3   24.1     "
           3.23403   21 27 03.42   -15 44 11.3   23.9     "
           3.27028   21 27 03.07   -15 44 12.8   24.1     "
           5.44288   21 26 43.40   -15 45 41.1   23.9   Holman
           5.48448   21 26 43.00   -15 45 42.7            "
           5.52555   21 26 42.64   -15 45 44.1            "

B. Gladman (European Southern Observatory).  3.6-m reflector + CCD.
M. Holman (Mauna Kea).  3.5-m Canada-France-Hawaii reflector + CCD.
   Measured by J.-M. Petit, B. Gladman and J. Kavelaars.

     The following perturbed orbital elements, by G. V. Williams, are
from the above data and the 20 observations from 1999 on MPC 38967:

                    Epoch = 2000 Sept.13.0 TT
     T = 2000 July 17.8212 TT         Peri. =  29.8432
     e = 0.145863                     Node  = 189.4991  2000.0
     q = 0.045348 AU                  Incl. = 141.5385
       a =  0.053092 AU    n = 0.5327706    P = 1.850 years

2000 TT     R. A. (2000) Decl.     Delta     r_U   Elong.  dR.A.   dDecl.
Aug.  4    21 26.95    -15 44.7   18.897    0.045  172.8    170-    156+
     14    21 25.42    -15 51.5   18.894    0.046  177.1    129-    199+
     24    21 23.92    -15 58.1   18.920    0.046  167.2     85-    239+
Sept. 3    21 22.49    -16 04.3   18.975    0.046  157.2     40-    276+
     13    21 21.21    -16 09.8   19.059    0.047  147.1      6+    308+
     23    21 20.12    -16 14.4   19.167    0.047  137.1     52+    335+
Oct.  3    21 19.28    -16 17.9   19.298    0.048  127.1     97+    358+
     13    21 18.73    -16 20.0   19.447    0.048  117.1    141+    376+
     23    21 18.49    -16 20.8   19.610    0.049  107.1    183+    390+
Nov.  2    21 18.58    -16 20.1   19.783    0.050   97.1    223+    399+
     12    21 19.00    -16 17.9   19.958    0.050   87.2    260+    403+
     22    21 19.75    -16 14.3   20.133    0.051   77.3    293+    404+
Dec.  2    21 20.82    -16 09.3   20.302    0.052   67.5    323+    402+

                      (C) Copyright 2000 CBAT
2000 August 5                  (7473)              Brian G. Marsden

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