MPEC 2003-Y52 : 2001 UN18
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M.P.E.C. 2003-Y52 Issued 2003 Dec. 23, 19:52 UT
The Minor Planet Electronic Circulars contain information on unusual
minor planets and routine data on comets. They are published
on behalf of Commission 20 of the International Astronomical Union by the
Minor Planet Center, Smithsonian Astrophysical Observatory,
Cambridge, MA 02138, U.S.A.
Supported in part by the Steven and Michele Kirsch Foundation
Prepared using the Tamkin Foundation Computer Network
MPC@CFA.HARVARD.EDU
URL http://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714
2001 UN18
Revision to MPEC 2001-V13
Additional Observations:
K01U18N C2002 11 07.13992 01 12 22.56 +07 27 51.6 22.8 R EY052695
K01U18N C2002 11 07.24749 01 12 22.14 +07 27 49.2 EY052695
K01U18N C2003 10 23.15737 01 17 30.12 +08 03 14.7 22.5 R EY052695
K01U18N C2003 10 23.25280 01 17 29.73 +08 03 12.4 EY052695
Observer details:
695 Kitt Peak. Observers L. H. Wasserman, D. E. Trilling, R. L. Millis.
Measurers M. W. Buie, S. D. Kern, R. L. Millis, L. H. Wasserman, E. I.
Chiang, S. N. Hylton, K. B. Clancy, D. E. Trilling, L. E. Hutchinson,
J. R. Lovering. 4-m reflector + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees) and reference
021107 695 0.04- 0.00- 031023 695 0.08- 0.01- MPO 21109
Orbital elements:
2001 UN18
Epoch 2003 Dec. 27.0 TT = JDT 2453000.5 MPC
M 129.61607 (2000.0) P Q
n 0.00336220 Peri. 222.30526 -0.41862204 +0.90782650
a 44.1286367 Node 22.98014 -0.81541904 -0.36379440
e 0.0770410 Incl. 3.61702 -0.39980917 -0.20857777
P 293 H 6.4 G 0.15 U 6
Residuals in seconds of arc
011019 695 0.2- 0.1+ 021107 695 0.1+ 0.0 031023 695 0.1+ 0.0
011019 695 0.2+ 0.1- 021107 695 0.1- 0.0
011020 695 0.0 0.0 031023 695 0.1- 0.0
Ephemeris:
2001 UN18 a,e,i = 44.13, 0.08, 4 q = 40.729
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2003 12 17 01 14.67 +07 47.0 46.006 46.439 115.6 1.1 23.2
2003 12 27 01 14.50 +07 46.1 46.170 46.441 105.4 1.2 23.2
2004 01 06 01 14.47 +07 46.0 46.343 46.442 95.2 1.2 23.2
2004 01 16 01 14.58 +07 46.8 46.519 46.444 85.0 1.2 23.2
2004 01 26 01 14.82 +07 48.5 46.692 46.445 74.9 1.2 23.3
2004 02 05 01 15.20 +07 50.9 46.857 46.446 64.9 1.1 23.3
2004 02 15 01 15.70 +07 54.1 47.009 46.448 54.9 1.0 23.2
2004 02 25 01 16.31 +07 57.9 47.144 46.449 44.9 0.9 23.2
2004 03 06 01 17.01 +08 02.3 47.259 46.450 35.1 0.7 23.2
Brian G. Marsden (C) Copyright 2003 MPC M.P.E.C. 2003-Y52
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