MPEC 2000-U17: 1998 UN1
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M.P.E.C. 2000-U17 Issued 2000 Oct. 24, 17:07 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 UN1
Revision to MPEC 1998-U15
Observations:
J98U01N C2000 10 23.11292 05 14 34.21 +07 23 33.3 18.8 R 046
J98U01N C2000 10 23.11429 05 14 34.15 +07 23 29.4 046
J98U01N C2000 10 23.11561 05 14 34.10 +07 23 26.6 046
J98U01N C2000 10 23.11722 05 14 34.04 +07 23 22.2 046
J98U01N C2000 10 23.11869 05 14 33.98 +07 23 18.5 046
J98U01N C2000 10 23.12007 05 14 33.84 +07 23 13.2 046
J98U01N C2000 10 24.02409 05 13 55.32 +06 43 35.6 18.8 R 046
J98U01N C2000 10 24.02510 05 13 55.27 +06 43 32.6 046
J98U01N C2000 10 24.02617 05 13 55.22 +06 43 29.7 046
J98U01N C2000 10 24.02730 05 13 55.12 +06 43 26.8 046
J98U01N C2000 10 24.02929 05 13 55.05 +06 43 22.2 19.0 R 046
Observer details:
046 Klet. Observers J. Ticha, M. Tichy, M. Kocer. 0.57-m f/5.2
reflector + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
001023 046 0.04+ 0.02- 001024 046 0.04+ 0.02- MPC 33370 -0.049 day
Orbital elements:
1998 UN1
Epoch 2000 Sept. 13.0 TT = JDT 2451800.5 Spahr
M 58.84989 (2000.0) P Q
n 0.52927873 Peri. 87.64504 +0.48641869 +0.80905870
a 1.5136069 Node 217.96485 -0.84634022 +0.53008604
e 0.2206346 Incl. 32.42773 +0.21703708 +0.25383618
P 1.86 H 18.3 G 0.15 U 4
Residuals in seconds of arc
981019 704 0.4+ 0.2+ 981021 673 1.2+ 1.8- 981023 118 0.3+ 0.0
981019 704 0.0 0.4+ 981021 422 (1.6- 3.0+) 981023 118 0.2+ 0.2+
981019 704 0.8- 0.0 981021 422 0.2+ 1.0+ 981025 402 0.3- 0.5-
981019 704 1.3- 0.3- 981021 402 0.2- 0.4+ 981025 402 0.3+ 0.6-
981020 557 0.6+ 0.8- 981021 402 0.2+ 0.3+ 981025 402 0.4+ 0.6-
981020 557 0.0 1.0- 981021 402 0.0 0.2+ 981030 658 0.3- 1.3-
981020 046 0.5- 0.2- 981021 557 0.7+ 0.6+ 981030 658 0.4- 1.4-
981020 046 1.2- 1.1+ 981021 557 0.7+ 0.2+ 981030 658 0.0 1.3-
981020 046 1.1+ 0.4- 981021 104 1.5- 1.4+ 981031 402 (0.4- 2.2-)
981020 046 0.2- 0.1+ 981021 104 0.1+ 0.6+ 981031 402 0.3- 0.3+
981020 658 0.2- 0.0 981021 104 (0.8+ 2.5+) 981031 402 0.3- 0.1-
981020 658 0.5- 0.1- 981021 118 0.0 0.7+ 981105 402 0.6+ 0.2-
981020 658 0.4- 0.1+ 981021 118 0.2- 0.1- 981105 402 0.9+ 0.3-
981020 673 (4.6+ 3.8+) 981021 118 0.0 0.7+ 981105 402 0.2+ 1.3-
981020 673 (5.0+ 4.8+) 981021 557 0.1- 0.4- 981107 118 0.2- 1.0+
981020 422 0.1- 0.5+ 981021 557 0.1+ 0.4+ 981107 118 0.6- 0.5+
981020 422 0.7- 0.8+ 981021 557 0.1- 0.2+ 981121 426 0.8- 0.7-
981020 557 0.2+ 0.4+ 981021 468 0.4- 0.7- 981121 426 2.0- 0.2+
981020 557 0.8+ 0.4+ 981021 468 0.1+ 0.6+ 981121 426 (2.3- 0.6-)
981020 106 0.3+ 0.1- 981021 468 0.4+ 0.0 981123 360 0.3+ 0.1+
981020 106 1.1+ 1.7- 981021 620 0.4+ 0.2- 981123 360 0.0 0.5+
981020 118 0.4- 0.1- 981021 620 0.2- 0.2- 981123 360 0.1- 0.1+
981020 118 1.2+ 1.3+ 981021 620 1.0- 0.1- 001023 046 0.1+ 0.4+
981020 118 0.1+ 0.1+ 981021 620 1.5- 0.0 001023 046 0.1+ 0.1+
981020 106 (0.2+ 2.0-) 981022 658 0.3- 0.0 001023 046 0.3+ 0.8+
981020 587 0.2+ 0.5- 981022 658 0.2- 0.1+ 001023 046 0.5+ 0.6+
981020 106 1.3+ 0.7- 981022 658 0.3- 0.0 001023 046 0.5+ 0.7+
981020 587 0.7+ 0.1+ 981022 402 0.2+ 0.3+ 001023 046 0.6- 0.9-
981020 587 0.1+ 0.3+ 981022 402 0.1+ 0.3+ 001024 046 0.1+ 0.0
981020 046 0.3+ 0.2+ 981022 402 0.0 0.0 001024 046 0.1+ 0.3-
981020 046 0.3+ 0.2+ 981022 118 0.1+ 0.3+ 001024 046 0.1+ 0.4-
981020 046 0.2- 0.6- 981022 118 0.3+ 0.2+ 001024 046 0.6- 0.3-
981020 046 0.2- 0.4- 981022 118 0.2+ 0.4+ 001024 046 0.2- 0.4+
981021 673 (0.8+ 2.5-) 981023 118 0.3+ 0.3+
Ephemeris:
1998 UN1 a,e,i = 1.51, 0.22, 32 q = 1.1797
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2000 10 13 05 18.47 +14 27.4 0.727 1.498 119.7 35.3 19.9
2000 10 23 05 14.65 +07 28.7 0.688 1.529 129.7 30.0 19.7
2000 11 02 05 04.96 +00 05.0 0.668 1.559 139.0 24.7 19.5
2000 11 12 04 50.45 -06 59.4 0.673 1.588 145.0 21.0 19.5
2000 11 22 04 33.23 -12 55.0 0.703 1.616 145.4 20.3 19.6
2000 12 02 04 16.05 -17 09.2 0.757 1.643 140.6 22.4 19.8
2000 12 12 04 01.54 -19 37.7 0.831 1.669 133.4 25.4 20.2
2000 12 22 03 51.26 -20 37.6 0.919 1.693 125.6 28.2 20.5
2001 01 01 03 45.72 -20 31.7 1.017 1.715 118.1 30.4 20.8
2001 01 11 03 44.74 -19 41.6 1.120 1.736 111.1 31.9 21.1
2001 01 21 03 47.71 -18 23.4 1.227 1.755 104.5 32.9 21.3
2001 01 31 03 54.04 -16 48.6 1.335 1.773 98.5 33.3 21.6
2001 02 10 04 03.16 -15 05.5 1.442 1.789 92.9 33.4 21.8
2001 02 20 04 14.58 -13 19.7 1.547 1.803 87.7 33.2 21.9
Timothy B. Spahr (C) Copyright 2000 MPC M.P.E.C. 2000-U17
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