MPEC 2009-S108: 1995 YR1
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M.P.E.C. 2009-S108 Issued 2009 Sept. 27, 12:21 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
1995 YR1
Revision to MPEC 1995-Y03
Additional Observations:
J95Y01R C2009 09 26.37604 00 33 29.95 -04 55 53.3 20.7 V ES108G96
J95Y01R C2009 09 26.38229 00 33 28.87 -04 55 59.6 20.3 V ES108G96
J95Y01R C2009 09 26.38853 00 33 27.82 -04 56 04.9 20.2 V ES108G96
J95Y01R C2009 09 26.39470 00 33 26.71 -04 56 10.5 20.5 V ES108G96
J95Y01R C2009 09 27.26465 00 31 00.84 -05 09 13.2 20.7 V ES108G96
J95Y01R C2009 09 27.26604 00 31 00.62 -05 09 14.7 20.8 V ES108G96
J95Y01R C2009 09 27.26750 00 31 00.37 -05 09 15.7 20.3 V ES108G96
J95Y01R C2009 09 27.26889 00 31 00.12 -05 09 17.0 20.5 V ES108G96
J95Y01R C2009 09 27.30780 00 30 53.50 -05 09 51.3 21.1 R ES108926
J95Y01R C2009 09 27.31260 00 30 52.68 -05 09 56.1 21.2 R ES108926
Observer details:
926 Tenagra II Observatory. Observers P. R. Holvorcem, M. Schwartz. Measurer
P. R. Holvorcem. 0.81-m f/7 Ritchey-Chretien + CCD.
G96 Mt. Lemmon Survey. Observers A. R. Gibbs, A. Boattini. Measurers
E. C. Beshore, A. Boattini, G. J. Garradd, A. R. Gibbs, A. D. Grauer,
R. E. Hill, R. A. Kowalski, S. M. Larson, R. H. McNaught. 1.5-m reflector
+ CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
090926 G96 0.36+ 0.20+ 090927 926 0.36+ 0.20+ MPO 53578 -0.76 day
Orbital elements:
1995 YR1 PHA, Earth MOID = 0.0151 AU
Epoch 2009 June 18.0 TT = JDT 2455000.5 MPC
M 1.84095 (2000.0) P Q
n 0.44537190 Peri. 109.11955 -0.80252966 +0.59365925
a 1.6981948 Node 107.34055 -0.56806941 -0.72998497
e 0.8273341 Incl. 3.56087 -0.18232745 -0.33866007
P 2.21 H 20.2 G 0.15 U 4
Residuals in seconds of arc
951220 691 0.6- 0.1- 951225 691 0.7+ 0.1- 090927 G96 0.0 0.2+
951220 691 0.3- 0.4- 960119 691 1.5- 0.1- 090927 G96 0.3+ 0.1-
951220 691 0.7- 0.0 960119 691 0.6+ 0.6+ 090927 G96 0.3+ 0.2+
951222 691 0.4- 0.3+ 960119 691 0.8+ 0.7- 090927 G96 0.1+ 0.1+
951222 691 0.9+ 0.2+ 090926 G96 0.4- 0.2+ 090927 926 0.2+ 0.1+
951222 691 0.3- 0.3+ 090926 G96 0.3- 0.4- 090927 926 0.1+ 0.4-
951225 691 0.2+ 0.1+ 090926 G96 0.2+ 0.0
951225 691 0.6+ 0.1- 090926 G96 0.4- 0.0
Ephemeris:
1995 YR1 a,e,i = 1.70, 0.83, 4 q = 0.2932
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2009 09 26 00 34.58 -04 50.0 0.791 1.788 171.5 4.7 21.4
2009 09 27 00 31.75 -05 05.2 0.801 1.799 172.1 4.4 21.4
2009 09 28 00 28.99 -05 19.8 0.811 1.809 172.2 4.3 21.4
2009 09 29 00 26.29 -05 33.9 0.822 1.819 172.0 4.4 21.5
2009 09 30 00 23.67 -05 47.4 0.833 1.829 171.5 4.6 21.5
2009 10 01 00 21.11 -06 00.4 0.844 1.839 170.7 5.0 21.6
2009 10 02 00 18.62 -06 12.8 0.856 1.849 169.7 5.5 21.6
2009 10 03 00 16.20 -06 24.7 0.868 1.859 168.6 6.1 21.7
2009 10 04 00 13.85 -06 36.0 0.880 1.869 167.4 6.7 21.8
2009 10 05 00 11.57 -06 46.8 0.893 1.879 166.1 7.3 21.9
2009 10 06 00 09.36 -06 57.1 0.906 1.889 164.8 8.0 21.9
2009 10 07 00 07.23 -07 06.8 0.919 1.898 163.5 8.6 22.0
2009 10 08 00 05.17 -07 16.1 0.932 1.908 162.1 9.3 22.1
2009 10 09 00 03.17 -07 24.8 0.946 1.918 160.7 9.9 22.1
2009 10 10 00 01.25 -07 33.1 0.960 1.927 159.4 10.5 22.2
2009 10 11 23 59.40 -07 40.8 0.974 1.937 158.0 11.1 22.3
2009 10 12 23 57.61 -07 48.1 0.989 1.946 156.7 11.7 22.3
2009 10 13 23 55.90 -07 54.9 1.004 1.955 155.3 12.3 22.4
2009 10 14 23 54.25 -08 01.3 1.019 1.965 154.0 12.9 22.5
2009 10 15 23 52.67 -08 07.3 1.034 1.974 152.7 13.4 22.5
2009 10 16 23 51.16 -08 12.8 1.050 1.983 151.3 13.9 22.6
Timothy B. Spahr (C) Copyright 2009 MPC M.P.E.C. 2009-S108
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