MPEC 2010-T91 : 2009 YD7
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M.P.E.C. 2010-T91 Issued 2010 Oct. 12, 23:02 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 https://www.minorplanetcenter.org/iau/mpc.html ISSN 1523-6714
2009 YD7
Revision to MPEC 2009-Y47
Additional Observations:
K09Y07D C2010 09 20.27135 04 46 24.54 -06 06 43.6 ET091807
K09Y07D C2010 09 20.37486 04 46 24.62 -06 06 52.8 ET091807
K09Y07D C2010 10 09.40418 04 45 57.34 -06 33 57.6 21.4 R ET091688
K09Y07D C2010 10 09.47833 04 45 57.02 -06 34 03.3 ET091688
Observer details:
688 Lowell Observatory, Anderson Mesa Station. Observer L. H. Wasserman.
1.8-m Perkins telescope + CCD.
807 Cerro Tololo. Observers M. E. Schwamb, D. Rabinowitz, S. Tourtellotte.
1.3-m reflector + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
100920 807 6.2- 1.0- 101009 688 6.6- 0.7- MPO175320 -5.6 day
Orbital elements:
2009 YD7
Epoch 2010 July 23.0 TT = JDT 2455400.5 MPC
M 359.12813 (2000.0) P Q
n 0.00069852 Peri. 326.66064 -0.10959495 -0.90362245
a 125.8013627 Node 126.02845 +0.98658035 -0.14961544
e 0.8936093 Incl. 30.79752 +0.12102957 +0.40134984
P 1410 H 10.0 G 0.15 U 2
Residuals in seconds of arc
091113 809 0.6- 1.0+ 091216 809 0.1- 0.1+ 100106 809 0.1+ 0.0
091113 809 0.1+ 0.1- 091216 809 0.1+ 0.4+ 100324 809 0.8- 0.6-
091211 809 0.2+ 0.0 091217 809 0.2+ 0.5- 100324 809 0.6+ 1.0+
091211 809 0.3- 0.2- 091217 809 0.3- 0.5- 100920 807 0.2+ 0.2+
091214 809 0.1+ 0.1+ 091217 809 0.2- 0.5- 100920 807 0.1- 0.1-
091214 809 0.2+ 0.1- 100106 809 0.1- 0.2+ 101009 688 0.0 0.3-
091216 809 0.5+ 0.2- 100106 809 0.4+ 0.1+ 101009 688 0.2- 0.1+
Ephemeris:
2009 YD7 a,e,i = 125.80, 0.89, 31 q = 13.384
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2010 10 11 04 45.84 -06 36.1 13.774 14.344 123.1 3.3 21.8
2010 10 21 04 44.91 -06 49.0 13.653 14.328 131.2 3.0 21.8
2010 10 31 04 43.61 -07 00.0 13.552 14.312 138.6 2.6 21.7
2010 11 10 04 41.99 -07 08.7 13.474 14.297 145.0 2.3 21.7
2010 11 20 04 40.15 -07 14.3 13.422 14.282 149.4 2.0 21.7
2010 11 30 04 38.17 -07 16.4 13.396 14.267 150.9 1.9 21.6
2010 12 10 04 36.15 -07 14.8 13.398 14.251 149.0 2.0 21.6
2010 12 20 04 34.20 -07 09.3 13.427 14.237 144.2 2.3 21.7
2010 12 30 04 32.42 -06 59.8 13.481 14.222 137.5 2.7 21.7
2011 01 09 04 30.90 -06 46.7 13.559 14.207 129.7 3.1 21.7
2011 01 19 04 29.72 -06 30.2 13.656 14.192 121.3 3.4 21.8
2011 01 29 04 28.94 -06 10.8 13.770 14.178 112.6 3.7 21.8
2011 02 08 04 28.61 -05 49.1 13.896 14.164 103.8 3.9 21.8
2011 02 18 04 28.74 -05 25.7 14.030 14.149 94.9 4.0 21.9
2011 02 28 04 29.35 -05 01.1 14.167 14.135 86.2 4.0 21.9
2011 03 10 04 30.43 -04 36.0 14.302 14.121 77.5 3.9 21.9
2011 03 20 04 31.95 -04 10.9 14.433 14.107 69.0 3.8 21.9
2011 03 30 04 33.87 -03 46.3 14.554 14.093 60.8 3.5 21.9
2011 04 09 04 36.18 -03 22.8 14.662 14.080 52.8 3.2 21.9
2011 04 19 04 38.80 -03 00.7 14.755 14.066 45.3 2.9 21.9
2011 04 29 04 41.69 -02 40.3 14.830 14.053 38.2 2.5 21.9
2011 05 09 04 44.81 -02 22.0 14.885 14.039 32.1 2.2 21.9
Brian G. Marsden (C) Copyright 2010 MPC M.P.E.C. 2010-T91
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