MPEC 2009-U16 : 2005 UN157
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M.P.E.C. 2009-U16 Issued 2009 Oct. 17, 12:19 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 UN157
Revision to MPEC 2005-V28
Additional Observations:
K05UF7N C2009 10 16.25036 01 05 34.00 +01 10 10.0 21.2 V EU016G96
K05UF7N C2009 10 16.25663 01 05 33.14 +01 10 10.1 20.7 V EU016G96
K05UF7N C2009 10 16.26281 01 05 32.31 +01 10 09.4 21.2 V EU016G96
K05UF7N C2009 10 16.26904 01 05 31.41 +01 10 09.5 21.7 V EU016G96
K05UF7N C2009 10 16.28024 01 05 29.90 +01 10 09.6 21.2 V EU016G96
K05UF7N C2009 10 16.28990 01 05 28.57 +01 10 10.0 21.3 V EU016G96
K05UF7N C2009 10 16.29935 01 05 27.24 +01 10 09.5 21.9 V EU016G96
K05UF7N C2009 10 16.30860 01 05 25.94 +01 10 08.6 21.4 V EU016G96
K05UF7N C2009 10 16.41383 01 05 11.57 +01 10 07.0 21.0 R EU016H01
K05UF7N C2009 10 16.41937 01 05 10.81 +01 10 06.8 21.0 R EU016H01
K05UF7N C2009 10 16.42339 01 05 10.26 +01 10 06.8 21.0 R EU016H01
K05UF7N C2009 10 16.67242 01 04 36.81 +01 10 08.8 19.1 R EU016E10
K05UF7N C2009 10 16.67382 01 04 36.69 +01 10 09.1 19.5 R EU016E10
K05UF7N C2009 10 16.67511 01 04 36.46 +01 10 08.9 19.4 R EU016E10
K05UF7N C2009 10 17.16332 01 03 31.75 +01 09 53.4 20.1 R EU016H01
K05UF7N C2009 10 17.17466 01 03 30.23 +01 09 53.1 20.1 R EU016H01
K05UF7N C2009 10 17.18258 01 03 29.16 +01 09 52.9 20.1 R EU016H01
K05UF7N C2009 10 17.18825 01 03 28.40 +01 09 53.0 20.0 R EU016H01
K05UF7N C2009 10 17.26747 01 03 17.74 +01 09 51.9 21.6 V EU016G96
K05UF7N C2009 10 17.27450 01 03 16.81 +01 09 52.0 20.7 V EU016G96
K05UF7N C2009 10 17.28159 01 03 15.85 +01 09 51.9 20.8 V EU016G96
K05UF7N C2009 10 17.28866 01 03 14.94 +01 09 51.7 21.6 V EU016G96
K05UF7N C2009 10 17.29112 01 03 14.54 +01 09 51.9 20.8 R EU016926
K05UF7N C2009 10 17.29594 01 03 13.90 +01 09 52.0 20.7 R EU016926
K05UF7N HC2009 10 17.38901 01 03 01.50 +01 09 50.4 EU016291
K05UF7N HC2009 10 17.39286 01 03 00.87 +01 09 50.6 EU016291
K05UF7N HC2009 10 17.39746 01 03 00.19 +01 09 50.1 EU016291
Observer details:
291 LPL/Spacewatch II. Observer J. V. Scotti. 1.8-m f/2.7 reflector + CCD.
926 Tenagra II Observatory. Observers P. R. Holvorcem, M. Schwartz. Measurer
P. R. Holvorcem. 0.81-m f/7 Ritchey-Chretien + CCD.
E10 Siding Spring-Faulkes Telescope South. Observer R. Miles. 2.0-m f/10.0
Ritchey-Chretien + CCD.
G96 Mt. Lemmon Survey. Observers R. E. Hill, R. Hill. 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.
H01 Magdalena Ridge Observatory, Socorro. Observer W. H. Ryan. 2.4-m f/8.9
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
091016 G96 4.19+ 9.46+ 091017 291 4.30+ 9.31+ MPO 97906 -28.3 day
Orbital elements:
2005 UN157 Earth MOID = 0.4292 AU
Epoch 2010 Jan. 4.0 TT = JDT 2455200.5 MPC
M 55.63183 (2000.0) P Q
n 0.24617029 Peri. 209.89251 -0.67287806 +0.69222001
a 2.5214225 Node 21.82181 -0.45890521 -0.11398204
e 0.8535762 Incl. 44.57630 -0.58020783 -0.71262863
P 4.00 H 18.3 G 0.15 U 5
Residuals in seconds of arc
051029 G96 0.4- 0.1- 051111 568 0.2- 0.1+ 091016 E10 0.1+ 0.0
051029 G96 0.5- 0.2+ 051111 568 0.1+ 0.1- 091017 H01 0.2- 0.0
051029 G96 0.2- 0.1- 091016 G96 0.0 0.6- 091017 H01 0.1- 0.2-
051029 G96 0.5+ 0.7- 091016 G96 0.0 0.3- 091017 H01 0.1- 0.2-
051029 G96 0.1- 0.4- 091016 G96 0.3+ 0.9- 091017 H01 0.1- 0.1-
051029 G96 0.6+ 0.1- 091016 G96 0.3- 0.7- 091017 G96 0.1- 0.1-
051029 G96 0.1+ 0.2- 091016 G96 0.2+ 0.3- 091017 G96 0.2+ 0.1+
051029 G96 1.6- 0.2+ 091016 G96 0.1+ 0.3+ 091017 G96 0.1+ 0.1+
051030 G96 1.6- 0.2- 091016 G96 0.3- 0.0 091017 G96 0.7+ 0.0
051030 G96 0.4- 0.3+ 091016 G96 0.7- 0.7- 091017 926 0.3- 0.2+
051030 G96 1.9- 0.3+ 091016 H01 0.1+ 0.0 091017 926 0.1- 0.4+
051030 G96 0.9+ 0.4+ 091016 H01 0.1+ 0.1- 091017 291 1.5+ 0.2+
051103 291 0.2- 0.5+ 091016 H01 0.0 0.0 091017 291 0.2- 0.5+
051103 291 0.8+ 0.8- 091016 E10 0.2- 0.2- 091017 291 1.2- 0.0
051103 291 0.6+ 0.9+ 091016 E10 0.9+ 0.1+
Ephemeris:
2005 UN157 a,e,i = 2.52, 0.85, 45 q = 0.3692
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2009 10 16 01 06.13 +01 10.3 1.330 2.320 171.2 3.8 21.1
2009 10 17 01 03.89 +01 10.0 1.342 2.330 170.1 4.2 21.2
2009 10 18 01 01.69 +01 09.8 1.354 2.340 168.9 4.7 21.2
2009 10 19 00 59.54 +01 09.6 1.367 2.350 167.6 5.2 21.3
2009 10 20 00 57.44 +01 09.6 1.380 2.360 166.3 5.7 21.3
2009 10 21 00 55.38 +01 09.7 1.394 2.369 165.0 6.3 21.4
2009 10 22 00 53.37 +01 09.8 1.408 2.379 163.6 6.8 21.4
2009 10 23 00 51.42 +01 10.1 1.422 2.389 162.3 7.3 21.5
2009 10 24 00 49.51 +01 10.5 1.437 2.399 160.9 7.8 21.5
2009 10 25 00 47.66 +01 11.0 1.452 2.408 159.5 8.3 21.6
2009 10 26 00 45.85 +01 11.6 1.467 2.418 158.2 8.8 21.6
2009 10 27 00 44.10 +01 12.4 1.482 2.428 156.8 9.3 21.7
2009 10 28 00 42.40 +01 13.2 1.498 2.437 155.5 9.7 21.7
2009 10 29 00 40.75 +01 14.1 1.514 2.447 154.1 10.2 21.8
2009 10 30 00 39.15 +01 15.2 1.531 2.456 152.8 10.7 21.8
2009 10 31 00 37.60 +01 16.4 1.547 2.466 151.5 11.1 21.9
2009 11 01 00 36.11 +01 17.6 1.565 2.475 150.2 11.5 21.9
2009 11 02 00 34.66 +01 19.0 1.582 2.485 148.8 11.9 22.0
2009 11 03 00 33.27 +01 20.5 1.599 2.494 147.5 12.3 22.0
2009 11 04 00 31.92 +01 22.1 1.617 2.503 146.3 12.7 22.1
2009 11 05 00 30.62 +01 23.8 1.635 2.513 145.0 13.1 22.1
Timothy B. Spahr (C) Copyright 2009 MPC M.P.E.C. 2009-U16
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