MPEC 2000-P11 : 1998 UL1
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M.P.E.C. 2000-P11 Issued 2000 Aug. 2, 16:58 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
BMARSDEN@CFA.HARVARD.EDU or GWILLIAMS@CFA.HARVARD.EDU
URL http://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714
1998 UL1
Revision to MPEC 1998-U13
Observations:
J98U01L 1C2000 07 08.82239 02 02 50.03 +35 16 13.9 20.2 R 413
J98U01L 1C2000 07 08.82586 02 02 50.44 +35 16 15.3 413
J98U01L C2000 08 02.02517 02 43 11.78 +35 49 45.6 20.5 R 540
J98U01L IC2000 08 02.03985 02 43 13.13 +35 49 42.5 540
J98U01L C2000 08 02.05363 02 43 14.31 +35 49 43.6 540
Observer details:
413 Siding Spring. Observer R. H. McNaught. 1.0-m f/8 reflector + CCD.
540 Linz. Observer E. Meyer. 0.6-m f/3.0 reflector + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
000708 413 28.1- 16.5+ 000802 540 31.2- 21.6+ MPC 33370 -0.029 day
Orbital elements:
1998 UL1
Epoch 2000 Sept. 13.0 TT = JDT 2451800.5 Williams
M 172.37080 (2000.0) P Q
n 0.52236204 Peri. 353.05622 -0.86534612 +0.32339002
a 1.5269388 Node 214.92495 -0.42163465 -0.88273944
e 0.2141426 Incl. 41.97281 -0.27092493 +0.34086651
P 1.89 H 16.6 G 0.15 U 4
Residuals in seconds of arc
981018 704 1.0- 0.9+ 981021 402 0.0 0.1+ 981029 360 0.3- 0.9-
981018 704 0.2- 0.8+ 981021 402 0.3+ 0.3+ 981030 658 0.5- 0.5-
981018 704 0.9- 0.8+ 981021 557 0.0 0.2+ 981030 658 0.6- 0.6-
981018 704 1.5+ 0.8+ 981021 557 0.1- 0.5+ 981030 658 0.6- 0.6-
981020 557 0.5+ 0.0 981021 557 0.2+ 0.3- 981031 402 0.3- 0.8-
981020 557 0.7+ 0.2- 981021 620 0.5- 0.0 981031 402 0.1+ 0.0
981020 557 0.7+ 0.5- 981021 620 0.0 0.0 981031 402 1.0+ 0.5-
981020 658 0.0 0.4- 981021 620 0.7+ 0.1- 981108 118 0.3+ 0.3-
981020 658 0.6+ 0.6- 981022 658 0.2- 0.3- 981108 118 0.4- 0.2+
981020 658 0.0 0.6- 981022 658 0.1+ 0.1- 981114 402 0.4+ 0.3+
981020 422 0.0 1.0+ 981022 658 0.1- 0.1+ 981114 402 0.1- 0.2+
981020 422 0.0 0.6+ 981023 118 0.2+ 0.2+ 981114 402 0.4- 0.5+
981020 422 0.3+ 0.1+ 981023 118 0.7+ 0.4+ 981121 426 0.3+ 0.3-
981020 422 0.1+ 0.5- 981024 118 0.9- 0.5+ 981121 426 0.2+ 0.1-
981020 557 0.1+ 0.1+ 981024 118 0.5- 0.2+ 981121 426 0.5+ 0.8+
981020 557 0.6+ 0.0 981025 402 0.4- 1.0+ 981123 360 0.0 0.3+
981020 046 0.3+ 0.1+ 981025 402 0.2- 0.7+ 981123 360 0.1- 0.2+
981020 046 0.0 0.8+ 981025 402 0.3- 0.6+ 981123 360 0.1- 0.2-
981020 046 0.1+ 0.5+ 981027 658 0.9+ 1.1- 000708 413 0.0 0.1-
981020 046 0.0 0.2+ 981027 658 1.3+ 0.9- 000708 413 0.4+ 0.6+
981021 422 0.5- 0.1- 981028 587 0.2- 0.3- 000802 540 0.9- 0.6+
981021 422 0.6+ 0.1+ 981028 587 1.1- 0.3+ 000802 540 0.0 1.9-
981021 422 1.5- 1.8- 981029 360 0.3- 0.7- 000802 540 0.2- 0.2-
981021 402 0.2- 0.4+ 981029 360 0.4- 0.5-
Ephemeris:
1998 UL1 a,e,i = 1.53, 0.21, 42 q = 1.2000
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2000 07 25 02 30.84 +35 50.2 1.766 1.816 76.2 32.9 20.5
2000 08 04 02 46.04 +35 47.7 1.661 1.827 82.3 33.4 20.4
2000 08 14 02 59.13 +35 23.8 1.550 1.836 88.9 33.5 20.3
2000 08 24 03 09.65 +34 34.7 1.433 1.843 96.3 33.0 20.1
2000 09 03 03 16.97 +33 14.6 1.315 1.848 104.6 31.9 19.9
2000 09 13 03 20.44 +31 15.0 1.198 1.852 114.0 29.7 19.6
2000 09 23 03 19.44 +28 25.2 1.088 1.854 124.8 26.4 19.3
2000 10 03 03 13.51 +24 33.1 0.991 1.854 137.1 21.5 19.0
2000 10 13 03 02.78 +19 30.7 0.914 1.852 151.1 15.1 18.6
2000 10 23 02 48.24 +13 24.9 0.867 1.848 165.9 7.5 18.2
2000 11 02 02 31.80 +06 46.8 0.855 1.842 172.0 4.3 18.0
2000 11 12 02 15.99 +00 26.1 0.879 1.835 158.2 11.5 18.3
2000 11 22 02 02.97 -04 54.2 0.935 1.826 143.5 18.8 18.7
2000 12 02 01 54.04 -08 54.7 1.016 1.815 130.1 24.6 19.1
2000 12 12 01 49.62 -11 38.5 1.112 1.802 118.4 28.7 19.4
2000 12 22 01 49.44 -13 19.4 1.217 1.787 108.2 31.5 19.6
2001 01 01 01 53.00 -14 12.0 1.324 1.771 99.2 33.2 19.8
2001 01 11 01 59.74 -14 29.4 1.429 1.753 91.3 34.1 20.0
2001 01 21 02 09.16 -14 21.5 1.529 1.734 84.3 34.4 20.1
2001 01 31 02 20.86 -13 55.5 1.620 1.713 78.0 34.2 20.2
2001 02 10 02 34.54 -13 17.1 1.702 1.690 72.4 33.8 20.3
2001 02 20 02 49.96 -12 30.3 1.773 1.666 67.4 33.2 20.3
2001 03 02 03 07.01 -11 38.2 1.832 1.641 63.0 32.6 20.4
Gareth V. Williams (C) Copyright 2000 MPC M.P.E.C. 2000-P11
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