MPEC 2008-Y21 : 2006 WA
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M.P.E.C. 2008-Y21 Issued 2008 Dec. 21, 02:16 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://www.cfa.harvard.edu/iau/mpc.html ISSN 1523-6714
2006 WA
Revision to MPEC 2006-W15
Additional Observations:
K06W00A C2008 12 20.09614 09 24 57.15 +60 28 36.5 21.0 C EY021493
K06W00A C2008 12 20.10208 09 24 57.10 +60 28 48.5 EY021493
K06W00A C2008 12 20.11189 09 24 56.96 +60 29 07.8 21.2 C EY021493
K06W00A C2008 12 20.99565 09 24 51.81 +60 58 00.4 21.0 C EY021493
K06W00A C2008 12 20.99951 09 24 51.78 +60 58 07.9 21.0 C EY021493
K06W00A C2008 12 21.00335 09 24 51.75 +60 58 15.7 20.9 C EY021493
Observer details:
493 Calar Alto. Observer F. Hormuth. 1.23-m reflector + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
081220 493 96.5+ 40.4- 081221 493 97.3+ 41.0- MPO114811 -0.038 day
Orbital elements:
2006 WA Earth MOID = 0.4222 AU
Epoch 2008 Nov. 30.0 TT = JDT 2454800.5 MPC
M 112.88697 (2000.0) P Q
n 0.54043169 Peri. 270.38215 +0.75213028 +0.52232697
a 1.4927102 Node 58.17465 -0.23295881 +0.78111842
e 0.1426008 Incl. 28.22539 -0.61646593 +0.34209435
P 1.82 H 19.9 G 0.15 U 4
Residuals in seconds of arc
061116 691 0.1+ 0.1- 061120 448 0.2- 0.4- 061201 G96 0.2+ 0.6-
061116 691 0.1- 0.1- 061120 448 0.2- 0.2- 061201 G96 0.2+ 0.8-
061116 691 0.4- 0.2+ 061120 448 0.6- 0.6- 061212 291 0.1+ 0.0
061116 D35 0.6+ 0.1+ 061121 704 0.3- 1.0- 061212 291 0.0 0.0
061116 D35 0.1+ 0.0 061121 704 0.2- 1.0+ 061212 291 0.0 0.0
061116 D35 0.2- 0.5+ 061121 704 0.1- 0.0 061216 696 0.8+ 0.4+
061116 113 0.7- 0.2+ 061121 704 0.4- 0.3+ 061216 696 0.6+ 0.5-
061116 113 (1.5- 0.1+) 061121 704 0.5- 1.4+ 061222 696 0.3+ 0.1-
061116 113 1.2- 1.2- 061125 H55 1.1- 1.0+ 061222 696 0.4+ 0.2+
061116 246 0.6- 0.1- 061125 H55 0.5+ 0.9- 061224 291 0.9+ 0.5-
061116 246 0.7+ 0.1- 061125 H55 1.5+ 0.4- 061224 291 0.2- 0.2+
061116 246 0.0 0.2- 061125 H55 1.4- 0.4+ 061224 291 0.4- 0.4+
061116 J95 1.5+ 0.2+ 061126 448 0.1+ 0.1- 081220 493 0.1+ 0.3+
061116 J95 0.4+ 0.4- 061126 448 0.1+ 0.1- 081220 493 0.2+ 0.5+
061117 448 (2.5+ 2.0-) 061126 448 0.1- 0.1- 081220 493 0.1- 0.3+
061117 448 (2.0+ 0.3+) 061130 291 0.3- 0.3+ 081220 493 0.1- 0.0
061117 448 0.1- 0.9+ 061130 291 0.2- 0.1+ 081220 493 0.1+ 0.2-
061117 291 0.5- 0.1+ 061130 291 0.0 0.0 081221 493 0.2+ 0.1-
061117 291 0.4- 0.0 061201 G96 0.8+ 0.7-
061117 291 0.4- 0.0 061201 G96 0.4+ 0.6+
Ephemeris:
2006 WA a,e,i = 1.49, 0.14, 28 q = 1.2798
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2008 12 20 09 24.95 +60 25.4 0.826 1.629 128.2 28.3 21.8
2008 12 30 09 18.68 +65 37.8 0.825 1.643 130.3 27.1 21.8
2009 01 09 08 58.51 +69 52.8 0.841 1.655 130.1 27.0 21.8
2009 01 19 08 24.04 +72 35.4 0.872 1.666 127.7 27.8 21.9
2009 01 29 07 43.85 +73 27.5 0.914 1.676 123.8 29.2 22.1
Gareth V. Williams (C) Copyright 2008 MPC M.P.E.C. 2008-Y21
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