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IAUC 7385: S/1999 U 1, S/1999 U 2, S/1999 U 3

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                                                  Circular No. 7385
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 1, S/1999 U 2 AND S/1999 U 3
     The complete set of observations of these three new presumed satellites
of Uranus (cf. IAUC 7230, 7248) is given on MPC 38967.  Although the orbits
are not yet uniquely determined, results from fully converged solutions
(a = 0.17 AU, e = 0.06, i = 158 deg for S/1999 U 1; a = 0.05 AU, e = 0.60,
i = 69 deg for S/1999 U 2; a = 0.14 AU, e = 0.45, i = 151 deg for
S/1999 U 3) are given on MPC 39024.  These orbital elements lead to the
following current search ephemerides:

2000 TT     R. A. (2000) Decl.     Delta     r_U   Elong.  dR.A.   dDecl.
Mar. 27    21 30.25    -15 30.1   20.585    0.170   46.7   1653+    429+
Apr.  6    21 31.88    -15 22.7   20.457    0.170   56.2   1666+    426+
     16    21 33.26    -15 16.6   20.315    0.170   65.6   1679+    422+
     26    21 34.35    -15 11.8   20.160    0.170   75.1   1693+    418+
May   6    21 35.15    -15 08.5   19.998    0.170   84.6   1707+    413+
     16    21 35.63    -15 06.8   19.834    0.170   94.2   1721+    407+
     26    21 35.79    -15 06.6   19.672    0.170  103.7   1735+    401+
June  5    21 35.62    -15 08.0   19.516    0.169  113.4   1749+    393+
     15    21 35.15    -15 10.9   19.372    0.169  123.1   1761+    384+

Mar. 27    21 28.43    -15 29.2   20.598    0.049   47.1     67+    484+
Apr.  6    21 30.07    -15 21.3   20.464    0.052   56.6     97+    513+
     16    21 31.47    -15 14.7   20.315    0.054   66.0    127+    538+     26    21 32.58    -15 09.5   20.154    0.057   75.5    157+    560+     16    21 33.89    -15 03.7   19.816    0.062   94.5    215+    594+     26    21 34.07    -15 03.2   19.649    0.064  104.1    244+    606+     15    21 33.47    -15 06.9   19.339    0.068  123.4    298+    620+     16    21 30.22    -15 20.1   20.476    0.184   66.3    954-    214+     26    21 31.26    -15 15.2   20.318    0.185   75.8    991-    216+     16    21 32.43    -15 09.8   19.984    0.187   94.9   1060-    224+     26    21 32.53    -15 09.4   19.819    0.187  104.5   1091-    229+     15    21 31.80    -15 13.2   19.513    0.189  123.8   1147-    243+                      (C) Copyright 2000 CBAT
2000 March 24                  (7385)              Brian G. Marsden

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