MPEC 2003-U55 : 2003 UC20
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M.P.E.C. 2003-U55 Issued 2003 Oct. 23, 15:23 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.
Supported in part by the Steven and Michele Kirsch Foundation
Prepared using the Tamkin Foundation Computer Network
MPC@CFA.HARVARD.EDU
URL http://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714
2003 UC20
Observations:
K03U20C* C2003 10 21.46631 08 40 54.38 +07 20 49.7 18.7 704
K03U20C C2003 10 21.47788 08 40 52.99 +07 20 33.0 19.0 704
K03U20C C2003 10 21.48947 08 40 51.56 +07 20 16.8 18.4 704
K03U20C C2003 10 21.50109 08 40 50.15 +07 20 00.4 18.8 704
K03U20C C2003 10 22.42165 08 39 12.98 +06 57 51.4 18.2 704
K03U20C C2003 10 22.43331 08 39 11.62 +06 57 33.9 18.5 704
K03U20C C2003 10 22.43877 08 39 10.97 +06 57 26.6 18.1 704
K03U20C C2003 10 22.44479 08 39 10.26 +06 57 17.7 19.5 704
K03U20C C2003 10 22.45065 08 39 09.50 +06 57 09.0 18.4 704
K03U20C C2003 10 22.45621 08 39 08.83 +06 57 01.2 19.4 704
K03U20C C2003 10 22.46263 08 39 08.08 +06 56 51.9 18.7 704
K03U20C C2003 10 22.46765 08 39 07.42 +06 56 44.2 19.0 704
K03U20C C2003 10 22.47456 08 39 06.62 +06 56 34.6 18.8 704
K03U20C C2003 10 22.48235 08 39 05.89 +06 56 25.3 18.7 R 926
K03U20C C2003 10 22.48388 08 39 05.68 +06 56 22.8 18.7 R 926
K03U20C C2003 10 22.48543 08 39 05.46 +06 56 20.4 18.5 R 926
K03U20C C2003 10 22.48657 08 39 05.12 +06 56 17.4 18.8 704
K03U20C 5C2003 10 22.51367 08 39 02.26 +06 55 37.1 18.0 R 673
K03U20C 5C2003 10 22.51574 08 39 01.95 +06 55 33.5 673
K03U20C 5C2003 10 22.51771 08 39 01.76 +06 55 31.1 673
K03U20C 5C2003 10 22.51968 08 39 01.51 +06 55 28.2 673
K03U20C 5C2003 10 22.52164 08 39 01.26 +06 55 25.3 673
K03U20C 5C2003 10 22.52361 08 39 01.02 +06 55 22.6 673
K03U20C 5C2003 10 23.46979 08 37 19.38 +06 31 48.8 17.8 R 673
K03U20C 5C2003 10 23.47188 08 37 19.15 +06 31 46.2 673
K03U20C 5C2003 10 23.47396 08 37 18.90 +06 31 42.5 673
Observer details:
673 Table Mountain Observatory, Wrightwood. Observer J. Young. 0.6-m
reflector + CCD.
704 Lincoln Laboratory ETS, New Mexico. Observers M. Blythe, F. Shelly,
M. Bezpalko, R. Huber, L. Manguso, D. Torres, R. Kracke, M. McCleary,
H. Stange. Measurers J. Stuart, R. Sayer, J. Evans, J. Kommers. 1.0-m
f/2.15 reflector + CCD.
926 Tenagra II Observatory. Observers P. R. Holvorcem, M. Schwartz. 0.81-m
f/7 Ritchey-Chretien + CCD.
Orbital elements:
2003 UC20
Epoch 2003 Oct. 8.0 TT = JDT 2452920.5 MPC
M 104.45003 (2000.0) P Q
n 1.42336213 Peri. 59.17594 -0.37236833 +0.92802885
a 0.7826948 Node 188.98003 -0.87228690 -0.35371726
e 0.3331762 Incl. 3.75101 -0.31695014 -0.11681843
P 0.69 H 19.3 G 0.15
From 26 observations 2003 Oct. 21-23.
Ephemeris:
2003 UC20 a,e,i = 0.78, 0.33, 4 q = 0.5219
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2003 10 18 08 46.95 +08 38.7 0.169 0.960 72.6 97.7 18.9
2003 10 28 08 28.61 +04 29.0 0.146 0.994 85.9 85.7 18.1
2003 11 07 08 03.37 -01 19.8 0.122 1.019 100.0 73.2 17.3
2003 11 17 07 20.35 -09 33.2 0.099 1.036 115.9 59.2 16.5
2003 11 27 06 03.38 -19 47.4 0.083 1.043 130.6 46.0 15.7
2003 12 07 04 15.62 -26 38.7 0.084 1.041 130.0 46.4 15.8
2003 12 17 02 43.89 -26 24.7 0.100 1.031 115.1 59.9 16.5
2003 12 27 01 48.89 -23 09.6 0.123 1.011 99.3 73.8 17.4
2004 01 06 01 16.98 -19 53.7 0.147 0.982 85.1 86.3 18.1
2004 01 16 00 54.18 -17 20.1 0.169 0.944 71.6 98.6 18.9
The orbital elements for 2003 UC20 bear some resemblance to those
of 1954 XA. Attempts to link the two apparitions have not been successful,
although a number of dynamical routes that allow 2003 UC20 to make a close
Earth approach in 1954 have been identified. Further observations are very
desirable.
Timothy B. Spahr (C) Copyright 2003 MPC M.P.E.C. 2003-U55
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