MPEC 2001-G31: 1998 WA31
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M.P.E.C. 2001-G31 Issued 2001 Apr. 14, 04:10 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.
Prepared using the Tamkin Foundation Computer Network
MPC@CFA.HARVARD.EDU
URL http://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714
1998 WA31
Revision to MPEC 1998-X38
Observations:
J98W31A 6C2000 01 06.29250 02 17 37.46 +16 59 04.4 568
J98W31A 6C2000 01 06.32548 02 17 37.41 +16 59 03.8 568
J98W31A 6C2000 01 07.28238 02 17 36.24 +16 58 56.0 568
J98W31A 6C2000 01 07.31050 02 17 36.21 +16 58 55.5 568
J98W31A 3C2000 12 24.23678 02 23 58.83 +17 46 36.3 568
J98W31A 3C2000 12 24.34670 02 23 58.51 +17 46 34.6 568
Observer details:
568 Mauna Kea. Observers J. Kavelaars, A. Morbidelli, C. Veillet,
A. Doressoundiram, J. Shapiro. Measurer C. Veillet. 3.6-m
Canada-France-Hawaii Telescope + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees) and reference
000106 568 0.19+ 0.07+ 001224 568 0.34+ 0.11+ MPC 33766
Orbital elements:
1998 WA31
Epoch 2001 Apr. 1.0 TT = JDT 2452000.5 Marsden
M 29.52414 (2000.0) P Q
n 0.00238086 Peri. 310.59166 +0.87343551 +0.48347444
a 55.5452767 Node 20.69954 -0.38233310 +0.75466936
e 0.4295226 Incl. 9.44270 -0.30154902 +0.44353875
P 414 H 7.2 G 0.15 U 3
Residuals in seconds of arc
981118 695 0.5+ 0.0 981217 950 0.7- 1.0+ 000107 568 0.1- 0.1+
981118 695 0.1- 0.2- 981217 950 0.4+ 0.1+ 000107 568 0.0 0.1-
981118 695 0.1- 0.0 981217 950 0.2+ 0.9- 001224 568 0.2+ 0.0
981119 695 0.2- 0.1- 000106 568 0.0 0.3+ 001224 568 0.1- 0.1-
981119 695 0.0 0.1- 000106 568 0.0 0.0
Ephemeris:
1998 WA31 a,e,i = 55.55, 0.43, 9 q = 31.687
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2001 06 10 02 34.91 +18 38.2 40.377 39.572 37.1 0.9 23.4
2001 06 20 02 35.78 +18 43.2 40.277 39.582 46.4 1.1 23.4
2001 06 30 02 36.53 +18 47.7 40.157 39.593 55.7 1.2 23.4
2001 07 10 02 37.15 +18 51.8 40.021 39.603 65.0 1.3 23.4
2001 07 20 02 37.63 +18 55.2 39.874 39.613 74.4 1.4 23.4
2001 07 30 02 37.95 +18 57.9 39.719 39.624 83.9 1.5 23.4
2001 08 09 02 38.10 +19 00.0 39.561 39.634 93.4 1.5 23.4
2001 08 19 02 38.09 +19 01.2 39.405 39.644 103.0 1.4 23.4
2001 08 29 02 37.91 +19 01.7 39.255 39.655 112.6 1.3 23.3
2001 09 08 02 37.58 +19 01.4 39.116 39.665 122.4 1.2 23.3
2001 09 18 02 37.10 +19 00.4 38.993 39.675 132.2 1.1 23.3
2001 09 28 02 36.49 +18 58.6 38.890 39.686 142.1 0.9 23.3
2001 10 08 02 35.78 +18 56.3 38.811 39.696 152.0 0.7 23.3
2001 10 18 02 34.98 +18 53.4 38.758 39.706 162.0 0.4 23.2
2001 10 28 02 34.14 +18 50.0 38.733 39.717 171.7 0.2 23.2
2001 11 07 02 33.27 +18 46.4 38.739 39.727 175.5 0.1 23.2
2001 11 17 02 32.42 +18 42.7 38.775 39.738 166.5 0.3 23.2
2001 11 27 02 31.61 +18 39.0 38.841 39.748 156.5 0.6 23.3
2001 12 07 02 30.89 +18 35.5 38.936 39.758 146.2 0.8 23.3
2001 12 17 02 30.26 +18 32.4 39.055 39.769 136.0 1.0 23.3
2001 12 27 02 29.77 +18 29.7 39.197 39.779 125.7 1.2 23.3
2002 01 06 02 29.43 +18 27.6 39.357 39.789 115.4 1.3 23.4
2002 01 16 02 29.26 +18 26.3 39.530 39.800 105.2 1.4 23.4
2002 01 26 02 29.25 +18 25.7 39.711 39.810 95.1 1.4 23.4
2002 02 05 02 29.42 +18 26.0 39.895 39.820 85.0 1.4 23.4
2002 02 15 02 29.77 +18 27.0 40.076 39.831 74.9 1.4 23.4
2002 02 25 02 30.27 +18 28.9 40.249 39.841 65.0 1.3 23.4
2002 03 07 02 30.92 +18 31.6 40.410 39.852 55.2 1.2 23.4
2002 03 17 02 31.71 +18 35.0 40.554 39.862 45.4 1.0 23.4
2002 03 27 02 32.61 +18 39.0 40.678 39.872 35.7 0.8 23.4
Brian G. Marsden (C) Copyright 2001 MPC M.P.E.C. 2001-G31
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