MPEC 1999-T62: 1998 US43
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M.P.E.C. 1999-T62 Issued 1999 Oct. 14, 23:28 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 US43
Revision to MPEC 1998-X06
Observations:
J98U43S 3C1999 10 06.55934 03 17 46.28 +16 54 48.2 568
J98U43S 3C1999 10 09.53349 03 17 33.50 +16 53 45.2 568
J98U43S 3C1999 10 09.57011 03 17 33.32 +16 53 44.2 568
J98U43S 5C1999 10 09.60427 03 17 33.15 +16 53 43.6 23.4 R 568
J98U43S 5C1999 10 09.63619 03 17 33.05 +16 53 42.9 23.3 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 55.3- 12.4- 991009 568 54.7- 11.8- MPC 33762
Orbital elements:
1998 US43
Epoch 1999 Aug. 10.0 TT = JDT 2451400.5 Marsden
M 35.44950 (2000.0) P Q
n 0.00393707 Peri. 139.69604 +0.99050432 -0.05242024
a 39.7210578 Node 223.82366 +0.01637349 +0.96285501
e 0.1466892 Incl. 10.57644 +0.13650309 +0.26488178
P 250 H 7.9 G 0.15 U 6
Residuals in seconds of arc
981022 695 0.3+ 0.0 981217 950 0.1- 0.2- 991009 568 0.1+ 0.2+
981022 695 0.2- 0.4- 981218 950 0.3+ 0.4+ 991009 568 0.1- 0.0
981118 695 0.3- 0.4+ 981218 950 0.1- 0.5- 991009 568 0.3- 0.1+
981118 695 0.1+ 0.3+ 991006 568 0.1- 0.4- 991009 568 0.3+ 0.1+
Ephemeris:
1998 US43 a,e,i = 39.72, 0.15, 11 q = 33.894
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1999 10 09 03 17.60 +16 53.9 34.528 35.339 143.8 1.0 23.5
1999 10 19 03 16.81 +16 50.1 34.444 35.342 153.9 0.7 23.5
1999 10 29 03 15.94 +16 46.0 34.388 35.344 164.0 0.4 23.4
1999 11 08 03 15.00 +16 41.8 34.361 35.347 174.2 0.2 23.4
1999 11 18 03 14.05 +16 37.4 34.365 35.350 175.2 0.1 23.4
1999 11 28 03 13.11 +16 33.3 34.399 35.353 165.0 0.4 23.4
1999 12 08 03 12.22 +16 29.3 34.464 35.356 154.7 0.7 23.5
1999 12 18 03 11.43 +16 25.8 34.556 35.359 144.3 0.9 23.5
1999 12 28 03 10.76 +16 22.8 34.673 35.362 134.0 1.1 23.5
2000 01 07 03 10.24 +16 20.5 34.811 35.365 123.6 1.3 23.5
2000 01 17 03 09.88 +16 18.9 34.967 35.368 113.4 1.5 23.6
2000 01 27 03 09.72 +16 18.1 35.134 35.371 103.1 1.6 23.6
2000 02 06 03 09.75 +16 18.0 35.309 35.374 93.0 1.6 23.6
2000 02 16 03 09.97 +16 18.8 35.485 35.377 82.9 1.6 23.6
2000 02 26 03 10.39 +16 20.3 35.657 35.380 73.0 1.5 23.6
2000 03 07 03 10.99 +16 22.5 35.821 35.383 63.1 1.4 23.6
2000 03 17 03 11.75 +16 25.4 35.972 35.386 53.3 1.3 23.6
2000 03 27 03 12.67 +16 28.8 36.105 35.389 43.6 1.1 23.6
2000 04 06 03 13.70 +16 32.6 36.217 35.392 34.0 0.9 23.6
Brian G. Marsden (C) Copyright 1999 MPC M.P.E.C. 1999-T62
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