MPEC 1999-T65: 1998 WU31
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M.P.E.C. 1999-T65 Issued 1999 Oct. 15, 14:21 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.
BMARSDEN@CFA.HARVARD.EDU or GWILLIAMS@CFA.HARVARD.EDU
URL http://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714
1998 WU31
Revision to MPEC 1999-A17
Observations:
J98W31U 3C1999 10 06.56854 03 20 04.86 +19 04 06.5 568
J98W31U 3C1999 10 09.54166 03 19 51.25 +19 03 10.2 568
J98W31U 3C1999 10 09.57817 03 19 51.07 +19 03 09.6 568
J98W31U 5C1999 10 11.57167 03 19 41.51 +19 02 30.2 23.3 R 568
J98W31U 5C1999 10 11.61914 03 19 41.27 +19 02 29.2 23.1 R 568
Observer details:
568 Mauna Kea. Observers C. Veillet, J. McDonald, S. Sheppard. 3.6-m
Canada-France-Hawaii Telescope + CCD, 2.2-m University of Hawaii
reflector + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc and reference
991006 568 65.8- 15.3- 991011 568 65.4- 15.5- MPC 35442
Orbital elements:
1998 WU31
Epoch 1999 Aug. 10.0 TT = JDT 2451400.5 Marsden
M 23.51983 (2000.0) P Q
n 0.00392964 Peri. 138.48582 +0.95927828 -0.26563025
a 39.7711097 Node 237.16385 +0.21951752 +0.91507727
e 0.2028799 Incl. 6.56415 +0.17775614 +0.30343726
P 251 H 8.3 G 0.15 U 6
Residuals in seconds of arc
981118 695 0.0 0.2- 981218 950 0.3- 0.1- 991009 568 0.2+ 0.1-
981118 695 0.1- 0.0 990122 568 0.1- 0.1+ 991009 568 0.1+ 0.1+
981118 695 0.1+ 0.2+ 990123 568 0.0 0.1+ 991011 568 0.1- 0.1-
981218 950 0.3+ 0.1- 991006 568 0.1- 0.2+ 991011 568 0.1- 0.1-
Ephemeris:
1998 WU31 a,e,i = 39.77, 0.20, 7 q = 31.702
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1999 10 09 03 19.90 +19 03.3 31.946 32.747 142.7 1.1 23.6
1999 10 19 03 19.06 +18 59.9 31.861 32.750 152.8 0.8 23.5
1999 10 29 03 18.11 +18 56.0 31.802 32.753 163.0 0.5 23.5
1999 11 08 03 17.11 +18 51.8 31.772 32.757 173.2 0.2 23.4
1999 11 18 03 16.07 +18 47.4 31.773 32.760 176.4 0.1 23.4
1999 11 28 03 15.06 +18 43.1 31.805 32.763 166.1 0.4 23.5
1999 12 08 03 14.10 +18 38.9 31.866 32.766 155.7 0.7 23.5
1999 12 18 03 13.24 +18 35.0 31.956 32.770 145.3 1.0 23.6
1999 12 28 03 12.51 +18 31.6 32.071 32.773 134.9 1.2 23.6
2000 01 07 03 11.95 +18 28.8 32.208 32.776 124.6 1.4 23.6
2000 01 17 03 11.57 +18 26.8 32.362 32.780 114.3 1.6 23.6
2000 01 27 03 11.39 +18 25.5 32.529 32.783 104.1 1.7 23.7
2000 02 06 03 11.43 +18 25.0 32.704 32.786 94.0 1.7 23.7
2000 02 16 03 11.68 +18 25.4 32.880 32.790 83.9 1.7 23.7
2000 02 26 03 12.14 +18 26.6 33.053 32.793 73.9 1.7 23.7
2000 03 07 03 12.79 +18 28.7 33.218 32.796 64.1 1.6 23.7
2000 03 17 03 13.63 +18 31.4 33.371 32.800 54.3 1.4 23.7
2000 03 27 03 14.63 +18 34.8 33.506 32.803 44.6 1.2 23.7
2000 04 06 03 15.77 +18 38.7 33.621 32.807 35.0 1.0 23.7
Brian G. Marsden (C) Copyright 1999 MPC M.P.E.C. 1999-T65
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