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IAUC 7450: S/1999 U 1; C/1998 K16, 1998 K17, 2000 M2

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                                                  Circular No. 7450
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
     This Uranian satellite has been recovered by M. Holman, T. Grav,
N. Haug and K. B. Klepper with the 2.5-m Nordic Optical Telescope at
La Palma 1'.5 east and 0'.5 north of the prediction on IAUC 7385
(elements on MPC 39024).  The following measurements are by B. Gladman:

    2000 UT             R.A. (2000) Decl.         R
     June 28.15684   21 34 12.06   -15 16 16.6   23.2
          28.18513   21 34 11.88   -15 16 17.6   23.5
          28.21395   21 34 11.71   -15 16 18.5   23.4
          29.16155   21 34 06.12   -15 16 48.8
          29.21126   21 34 05.80   -15 16 50.2   23.3

     These improved elements, derived by G. V. Williams from a new
unperturbed solution by B. G. Marsden, are still somewhat uncertain:

                    Epoch = 2000 Sept.13.0 TT
     T = 2003 Mar. 31.3912 TT         Peri. =   2.1890
     e = 0.494329                     Node  = 249.8452  2000.0
     q = 0.061537 AU                  Incl. = 148.8285
       a =  0.121694 AU    n = 0.1535250    P =   6.420 years

2000 TT     R. A. (2000) Decl.     Delta     r_U   Elong.  dR.A.   dDecl.
June 15    21 35.26    -15 10.4   19.332    0.180  123.0   1850+    414+
     25    21 34.50    -15 14.6   19.203    0.179  132.8   1864+    405+
July  5    21 33.48    -15 20.1   19.093    0.179  142.6   1875+    394+
     15    21 32.25    -15 26.6   19.007    0.179  152.4   1884+    383+
     25    21 30.85    -15 33.7   18.946    0.178  162.3   1889+    370+
Aug.  4    21 29.33    -15 41.3   18.913    0.178  172.2   1892+    357+
     14    21 27.75    -15 49.1   18.910    0.177  177.6   1891+    342+
     24    21 26.19    -15 56.6   18.936    0.177  167.7   1887+    328+
Sept. 3    21 24.71    -16 03.7   18.991    0.177  157.7   1880+    312+
     13    21 23.36    -16 10.0   19.074    0.176  147.6   1870+    297+
     23    21 22.21    -16 15.3   19.182    0.176  137.6   1858+    282+
Oct.  3    21 21.30    -16 19.4   19.312    0.175  127.5   1843+    268+


COMETS C/1998 K16, 1998 K17, 2000 M2
     Discovery positions for three more SOHO Kreutz sungrazers, further
details of which are contained on MPEC 2000-N17: 1998 May 29.356 UT,
R.A. = 4 24.1, Decl. +19 57 (equinox 2000.0); May 31.040, 4 27.8,
+20 01; 2000 June 18.208, 5 44.1, +21 47.

                      (C) Copyright 2000 CBAT
2000 July 8                    (7450)              Brian G. Marsden

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