MPEC 2008-W61 : 2005 YS
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M.P.E.C. 2008-W61 Issued 2008 Nov. 24, 17:30 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
2005 YS
Revision to MPEC 2005-Y18
Additional Observations:
K05Y00S 5C2008 11 23.46968 13 13 15.24 +78 08 02.3 18.8 R EW061673
K05Y00S 5C2008 11 23.47477 13 13 17.55 +78 08 26.2 EW061673
K05Y00S 5C2008 11 23.47905 13 13 19.63 +78 08 45.8 EW061673
K05Y00S 5C2008 11 23.48368 13 13 21.88 +78 09 07.0 EW061673
K05Y00S 5C2008 11 24.50336 13 22 35.77 +79 25 47.8 18.8 R EW061673
K05Y00S 5C2008 11 24.51007 13 22 39.62 +79 26 18.1 EW061673
K05Y00S 5C2008 11 24.51539 13 22 42.88 +79 26 44.1 EW061673
K05Y00S 5C2008 11 24.52083 13 22 46.15 +79 27 10.4 EW061673
Observer details:
673 Table Mountain Observatory, Wrightwood. Observer J. Young. 0.61-m f/16
Cassegrain + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
081123 673 96.9- 52.3- 081124 673 99.2- 50.2- MPO 98031 -0.012 day
Orbital elements:
2005 YS PHA, Earth MOID = 0.0304 AU
Epoch 2008 Nov. 30.0 TT = JDT 2454800.5 MPC
M 157.02455 (2000.0) P Q
n 1.64405939 Peri. 327.85098 -0.20377786 +0.92609388
a 0.7109805 Node 288.67889 -0.81225154 -0.34099289
e 0.5505130 Incl. 19.58371 -0.54655468 +0.16147437
P 0.60 H 19.7 G 0.15 U 4
Residuals in seconds of arc
051221 704 0.0 0.3- 051229 143 0.2- 1.1- 060120 291 0.2+ 0.1-
051221 704 0.2+ 0.2- 051230 448 0.7+ 0.1- 060120 291 0.3+ 0.3-
051221 704 0.0 0.0 051230 448 0.2- 0.3- 060120 291 0.5+ 0.2-
051221 704 0.2+ 0.0 051230 448 0.0 0.5- 060124 291 0.1- 0.1+
051221 704 0.3+ 0.2+ 051231 448 0.3- 0.4- 060124 291 0.0 0.1+
051222 734 0.1- 0.1- 051231 448 0.2+ 0.1- 060124 291 0.1+ 0.1+
051222 734 0.2- 0.0 051231 448 0.1+ 0.1- 060128 448 0.4+ 0.5-
051222 734 0.1+ 0.3- 051231 734 0.2- 0.1- 060128 448 0.0 0.8+
051222 734 0.0 0.1+ 051231 734 0.4+ 0.4- 060128 448 0.3+ 0.2+
051222 734 0.3- 0.8- 051231 734 0.1+ 0.7- 060202 291 0.5- 0.2-
051222 734 0.4- 0.4- 051231 696 0.3- 0.3- 060202 291 0.1- 0.2-
051222 701 0.2+ 0.8- 051231 696 0.1- 0.5+ 060202 291 0.2- 0.3-
051222 701 0.1+ 1.0- 060103 143 0.3- 0.5- 081123 673 0.3+ 0.3-
051223 704 0.5+ 0.1+ 060103 143 0.1- 0.7- 081123 673 0.1- 0.0
051223 704 0.0 0.4- 060110 291 (0.2- 1.5+) 081123 673 0.1+ 0.1-
051223 704 0.7+ 0.3+ 060110 291 0.7- 1.0+ 081123 673 0.2+ 0.3-
051226 J95 0.6+ 1.0+ 060110 291 0.1- 0.7+ 081124 673 0.0 0.5+
051226 J95 0.9- 0.2+ 060113 448 0.9+ 0.3+ 081124 673 0.4- 0.8-
051229 143 0.1- 0.4- 060113 448 0.6+ 0.1+ 081124 673 0.0 0.1+
051229 143 0.3+ 0.7- 060113 448 0.5+ 0.5- 081124 673 0.1+ 0.8+
Ephemeris:
2005 YS a,e,i = 0.71, 0.55, 20 q = 0.3196
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2008 11 20 12 52.48 +74 01.6 0.284 1.064 97.6 67.0 19.5
2008 11 30 16 07.07 +86 05.8 0.251 1.089 107.8 59.6 19.0
2008 12 10 23 40.53 +74 20.3 0.234 1.101 114.2 54.7 18.7
2008 12 20 00 20.63 +55 48.6 0.240 1.100 113.0 55.4 18.8
2008 12 30 00 41.55 +39 34.7 0.267 1.085 105.3 60.9 19.2
2009 01 09 00 57.82 +27 19.6 0.309 1.057 95.1 68.0 19.7
2009 01 19 01 11.38 +18 22.2 0.354 1.014 84.6 75.0 20.1
2009 01 29 01 22.29 +11 30.8 0.397 0.957 74.2 82.2 20.5
2009 02 08 01 29.42 +05 44.6 0.432 0.884 63.6 90.4 20.8
Gareth V. Williams (C) Copyright 2008 MPC M.P.E.C. 2008-W61
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