MPEC 2007-A29 : 1991 XB
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M.P.E.C. 2007-A29 Issued 2007 Jan. 9, 15:04 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://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714
1991 XB
Additional Observations:
J91X00B C2007 01 09.07318 23 17 32.96 +04 45 56.0 21.5 V EA029G96
J91X00B C2007 01 09.07693 23 17 33.72 +04 45 57.5 21.0 V EA029G96
J91X00B C2007 01 09.08069 23 17 34.47 +04 45 58.8 21.5 V EA029G96
J91X00B C2007 01 09.08441 23 17 35.23 +04 46 01.0 21.2 V EA029G96
Observer details:
G96 Mt. Lemmon Survey. Observer E. J. Christensen. Measurers E. C. Beshore,
E. J. Christensen, 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
070109 G96 1.07- 0.18- 070109 G96 1.07- 0.18- MPC 35684 +2.1 day
Orbital elements:
1991 XB Earth MOID = 0.2230 AU
Epoch 2007 Apr. 10.0 TT = JDT 2454200.5 MPC
M 12.12590 (2000.0) P Q
n 0.19534460 Peri. 172.36870 +0.45267998 -0.85155645
a 2.9417230 Node 250.39184 +0.80254961 +0.51834735
e 0.5896272 Incl. 16.30359 +0.38858070 -0.07853426
P 5.05 H 18.8 G 0.15 U 1
Residuals in seconds of arc
911005 675 0.3+ 0.6- 911215 691 0.0 0.2- 920113 413 0.0 0.7-
911201 675 0.6- 1.5- 911220 413 0.7- 0.1+ 920114 413 0.4- 0.1-
911201 675 0.7- 1.0+ 911220 413 0.1- 0.3+ 920114 413 0.3- 0.2-
911203 675 (0.3+ 3.0-) 911220 413 0.7+ 0.6- 920115 413 0.5- 0.2-
911203 675 0.3- 1.0+ 911220 413 0.3+ 0.0 920115 413 0.0 0.1-
911203 675 0.4+ 0.8+ 911220 413 0.3- 0.9- 920203 688 0.3+ 1.9+
911206 675 (0.3+ 2.9-) 920101 801 0.3+ 0.6- 920203 688 0.7+ 1.5+
911206 675 1.0- 1.1+ 920101 801 1.1- 0.5- 070109 G96 0.2- 0.3+
911206 675 0.5- 0.8+ 920113 688 1.1- 0.4+ 070109 G96 0.0 0.1+
911213 691 1.0+ 0.2- 920113 688 0.2- 0.0 070109 G96 0.1- 0.2-
911213 691 0.1+ 0.1- 920113 413 0.0 0.4- 070109 G96 0.2+ 0.3+
911215 691 0.0 0.0 920113 413 0.0 0.5-
Ephemeris:
1991 XB a,e,i = 2.94, 0.59, 16 q = 1.2072
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2007 01 10 23 20.68 +04 52.9 1.320 1.253 64.0 44.9 21.6
2007 01 15 23 37.88 +05 32.0 1.321 1.238 63.0 45.1 21.6
2007 01 20 23 55.62 +06 13.2 1.322 1.226 62.2 45.2 21.6
2007 01 25 00 13.85 +06 55.8 1.325 1.217 61.5 45.3 21.6
2007 01 30 00 32.53 +07 39.1 1.330 1.211 60.9 45.3 21.6
2007 02 04 00 51.60 +08 22.3 1.336 1.208 60.5 45.2 21.6
2007 02 09 01 11.00 +09 04.8 1.345 1.207 60.1 45.1 21.6
Timothy B. Spahr (C) Copyright 2007 MPC M.P.E.C. 2007-A29
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