MPEC 2004-D28 : 2003 FC128
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M.P.E.C. 2004-D28 Issued 2004 Feb. 21, 14:20 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 FC128
Revision to MPEC 2003-H07
Additional Observations:
K03FC8C C2002 02 06.37090 10 52 48.66 +09 45 08.5 21.3 R ED028695
K03FC8C C2002 02 06.46772 10 52 48.07 +09 45 11.3 ED028695
K03FC8C C2002 02 08.53339 10 52 37.09 +09 46 22.6 ED028695
K03FC8C C2004 02 21.35918 11 06 48.74 +08 20 16.6 21.4 R ED028695
K03FC8C C2004 02 21.40196 11 06 48.50 +08 20 18.1 21.4 R ED028695
Observer details:
695 Kitt Peak. Observers M. W. Buie, R. L. Millis, J. W. Parker,
C. W. Hergenrother. Measurers M. W. Buie, R. L. Millis, L. H.
Wasserman, J. L. Elliot, S. D. Kern, A. B. Jordan, E. Chiang,
D. E. Trilling, K. D. Clancy, J. W. Parker. 4-m reflector + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc and reference
020206 695 5.5+ 3.6- 040221 695 24.5- 11.8+ MPO 50759
Orbital elements:
2003 FC128
Epoch 2004 July 14.0 TT = JDT 2453200.5 MPC
M 38.30866 (2000.0) P Q
n 0.00472125 Peri. 41.09901 -0.49370612 -0.86868220
a 35.1909662 Node 78.52184 +0.78665466 -0.46599865
e 0.0901948 Incl. 2.37231 +0.37071380 -0.16803720
P 209 H 6.8 G 0.15 U 5
Residuals in seconds of arc
020206 695 0.6+ 0.3+ 030401 695 0.0 0.2+ 030531 568 0.1- 0.4-
020206 695 0.6- 0.2- 030420 304 0.0 0.1- 030601 568 0.1- 0.3-
020208 695 (3.4- 1.1+) 030421 304 0.1+ 0.1- 040221 695 0.0 0.2+
030331 695 0.1+ 0.1- 030501 688 0.1+ 0.0 040221 695 0.1+ 0.1+
030401 695 0.2- 0.0 030501 688 0.1- 0.3+
Ephemeris:
2003 FC128 a,e,i = 35.19, 0.09, 2 q = 32.017
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2004 02 15 11 07.39 +08 16.5 31.861 32.795 160.7 0.6 22.0
2004 02 25 11 06.47 +08 22.5 31.819 32.797 170.9 0.3 22.0
2004 03 06 11 05.52 +08 28.5 31.808 32.799 177.1 0.1 21.9
2004 03 16 11 04.57 +08 34.3 31.827 32.801 168.0 0.4 22.0
2004 03 26 11 03.66 +08 39.7 31.876 32.802 157.9 0.7 22.0
2004 04 05 11 02.83 +08 44.5 31.953 32.804 147.9 0.9 22.0
2004 04 15 11 02.10 +08 48.6 32.055 32.806 137.9 1.2 22.1
2004 04 25 11 01.50 +08 51.7 32.179 32.808 128.0 1.4 22.1
2004 05 05 11 01.05 +08 53.8 32.321 32.810 118.2 1.6 22.1
2004 05 15 11 00.78 +08 54.7 32.477 32.812 108.5 1.7 22.2
2004 05 25 11 00.69 +08 54.5 32.643 32.814 98.8 1.7 22.2
2004 06 04 11 00.79 +08 53.1 32.812 32.815 89.3 1.8 22.2
2004 06 14 11 01.07 +08 50.6 32.982 32.817 79.8 1.7 22.2
2004 06 24 11 01.53 +08 47.1 33.146 32.819 70.4 1.7 22.2
2004 07 04 11 02.16 +08 42.5 33.301 32.821 61.0 1.6 22.2
2004 07 14 11 02.94 +08 37.0 33.443 32.823 51.7 1.4 22.2
2004 07 24 11 03.86 +08 30.7 33.567 32.825 42.5 1.2 22.2
2004 08 03 11 04.90 +08 23.8 33.671 32.827 33.2 1.0 22.2
Although the inconsistency between the residuals on 2002 Feb. 6 and 8
remains a source of worry, it appears likely that this object is librating
in 4:5 resonance with Neptune (cf. 1999 CP133, MPEC 2002-E01), remaining more
than 7 AU from Neptune over a 14 000-year period, as was also implicit from the
one-opposition orbit on MPO 50759 (reprinted from MPEC 2003-M17) cited above.
Corrigendum. On MPEC 2004-D15, R. Matson should also have been credited
with some of the measurements of 2004 DW from observatory code 608.
Brian G. Marsden (C) Copyright 2004 MPC M.P.E.C. 2004-D28
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