MPEC 2008-R34 : 1991 TB2
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M.P.E.C. 2008-R34 Issued 2008 Sept. 8, 04:10 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
1991 TB2
Additional Observations:
J91T02B C2008 09 04.14087 21 20 14.01 -08 48 41.3 21.6 V ER034691
J91T02B C2008 09 04.15741 21 20 12.91 -08 48 46.2 21.6 V ER034691
J91T02B C2008 09 04.17395 21 20 11.77 -08 48 51.2 21.3 V ER034691
J91T02B C2008 09 04.25990 21 20 05.90 -08 49 19.5 22.3 V ER034291
J91T02B C2008 09 04.26366 21 20 05.59 -08 49 20.9 21.8 V ER034291
J91T02B C2008 09 04.26742 21 20 05.34 -08 49 22.3 21.8 V ER034291
J91T02B C2008 09 05.20874 21 19 02.16 -08 54 27.2 22.6 V ER034291
J91T02B HC2008 09 05.21457 21 19 01.76 -08 54 30.0 ER034291
J91T02B C2008 09 05.21868 21 19 01.47 -08 54 30.6 22.2 V ER034291
J91T02B C2008 09 06.17444 21 17 58.05 -08 59 38.0 22.3 V ER034291
J91T02B C2008 09 06.17814 21 17 57.83 -08 59 38.8 22.2 V ER034291
J91T02B C2008 09 06.18183 21 17 57.56 -08 59 40.4 21.9 V ER034291
J91T02B C2008 09 06.20145 21 17 56.23 -08 59 47.0 21.5 R ER034H01
J91T02B C2008 09 06.20861 21 17 55.74 -08 59 49.3 21.6 R ER034H01
J91T02B C2008 09 06.21572 21 17 55.27 -08 59 51.6 21.5 R ER034H01
Observer details:
291 LPL/Spacewatch II. Observers T. H. Bressi, J. V. Scotti. 1.8-m f/2.7
reflector + CCD.
691 Steward Observatory, Kitt Peak. Observer T. H. Bressi. 0.9-m f/3
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
080904 69110.56- 6.12- 080906 H0110.37- 6.06- MPO 57655 +95.4 day
Orbital elements:
1991 TB2 Earth MOID = 0.1112 AU
Epoch 2008 Nov. 30.0 TT = JDT 2454800.5 MPC
M 283.92251 (2000.0) P Q
n 0.33692455 Peri. 199.28146 -0.65702197 -0.74288928
a 2.0454127 Node 292.01562 +0.70855818 -0.55046096
e 0.7922441 Incl. 7.94911 +0.25742463 -0.38093077
P 2.93 H 17.1 G 0.15 U 4
Residuals in seconds of arc
910915 675 0.1+ 0.2- 080904 691 0.6- 0.4- 080905 291 0.1- 0.2-
910915 675 0.2- 0.4- 080904 691 0.0- 0.1+ 080906 291 0.2- 0.2+
911003 675 0.6- 1.9+ 080904 691 0.0- 0.5+ 080906 291 0.2+ 0.6+
911003 675 1.4+ 1.6+ 080904 291 0.8+ 0.2+ 080906 291 0.1- 0.2+
911004 675 0.5+ 0.6- 080904 291 0.1+ 0.0+ 080906 H01 0.0- 0.0-
911004 675 1.5- 0.3+ 080904 291 0.2+ 0.2- 080906 H01 0.1- 0.0-
911006 675 0.2- 1.0- 080905 291 0.1+ 0.0- 080906 H01 0.0- 0.0-
911006 675 0.6+ 1.6- 080905 291 0.0+ 0.9-
Ephemeris:
1991 TB2 a,e,i = 2.05, 0.79, 8 q = 0.4249
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2008 09 01 21 23.83 -08 31.5 2.265 3.235 160.7 5.9 21.9
2008 09 11 21 12.84 -09 24.9 2.290 3.193 148.6 9.4 22.0
2008 09 21 21 03.61 -10 12.9 2.342 3.149 136.7 12.6 22.2
2008 10 01 20 56.67 -10 53.0 2.416 3.102 125.2 15.3 22.3
2008 10 11 20 52.28 -11 23.4 2.505 3.053 114.2 17.3 22.4
2008 10 21 20 50.48 -11 43.7 2.604 3.002 103.9 18.8 22.5
2008 10 31 20 51.14 -11 53.8 2.707 2.949 94.1 19.6 22.6
2008 11 10 20 54.07 -11 53.7 2.810 2.893 84.8 19.9 22.6
2008 11 20 20 59.01 -11 43.8 2.907 2.834 75.9 19.8 22.7
2008 11 30 21 05.73 -11 24.3 2.995 2.772 67.5 19.2 22.7
Gareth V. Williams (C) Copyright 2008 MPC M.P.E.C. 2008-R34
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