MPEC 2010-H42 : 2009 RB4
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M.P.E.C. 2010-H42 Issued 2010 Apr. 22, 17:06 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.minorplanetcenter.org/iau/mpc.html ISSN 1523-6714
2009 RB4
Revision to MPEC 2009-R62
Additional Observations:
K09R04B 4 1990 07 27.36042 21 33 33.71 +20 08 45.8 EH042261
K09R04B 4 1990 07 27.40903 21 33 32.73 +20 07 35.1 EH042261
K09R04B 4 1992 05 01.16806 11 02 22.06 +18 02 16.1 EH042261
K09R04B 4 1992 05 01.20278 11 02 23.73 +18 02 44.7 EH042261
Observer details:
261 Palomar-DSS. Measurer A. Lowe. 1.2-m Schmidt.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
900727 261 3.00- 0.13+ 920501 261 1.42- 0.13- MPO166345 -0.13 day
Orbital elements:
2009 RB4 Earth MOID = 0.2107 AU
Epoch 2010 July 23.0 TT = JDT 2455400.5 MPC
M 219.03536 (2000.0) P Q
n 0.46990170 Peri. 74.91041 -0.22265713 +0.97487501
a 1.6385689 Node 182.25531 -0.94596448 -0.21766189
e 0.3007052 Incl. 9.53826 -0.23574353 -0.04735001
P 2.10 H 18.1 G 0.15 U 2
Residuals in seconds of arc
900727 261 0.2- 0.3- 090915 854 0.1+ 0.6+ 090925 703 0.0 0.5+
900727 261 0.3+ 0.2+ 090915 704 0.4- 1.2+ 090925 703 0.2+ 0.7-
920501 261 0.0 0.2- 090915 854 0.2+ 0.8- 090925 703 1.0+ 0.5+
920501 261 0.1- 0.3+ 090915 704 0.1- 1.1+ 090928 B88 0.0 0.3-
090914 704 0.6+ 0.4+ 090915 704 1.0+ 0.9+ 090928 B88 0.8- 0.4-
090914 704 0.5+ 0.6+ 090917 B88 0.3- 0.6- 090928 B88 0.1- 0.1-
090914 704 0.2+ 0.8+ 090917 B88 0.4- 0.3- 091012 474 0.2+ 0.0
090914 704 0.3+ 1.4+ 090918 B88 0.9- 0.3- 091012 474 0.2- 1.0-
090914 704 1.8+ 0.6+ 090918 H55 0.1+ 0.3- 091012 474 0.0 0.5-
090915 J95 0.2- 0.3- 090918 H55 0.1+ 0.2- 091012 474 0.4+ 0.6+
090915 J95 0.3+ 0.6- 090918 H55 0.2+ 0.2- 091013 704 0.2+ 0.2+
090915 A17 0.3+ 0.3- 090920 691 0.4- 0.0 091013 704 0.4+ 0.4+
090915 J95 0.5+ 0.5- 090920 691 0.6- 0.2- 091013 704 0.6+ 0.4+
090915 A17 0.4+ 0.3- 090920 691 0.3- 0.2+ 091017 G96 0.1- 0.5-
090915 A17 0.3+ 0.2- 090923 204 0.2+ 0.3- 091017 G96 0.5+ 0.2-
090915 H55 0.3- 0.0 090923 204 0.1+ 0.1- 091017 G96 0.7+ 0.3-
090915 H55 0.1- 0.1+ 090923 204 0.4- 0.1- 091017 G96 0.4+ 0.0
090915 H55 0.2+ 0.0 090924 D21 0.5+ 0.4+ 091020 704 0.4+ 0.4+
090915 291 0.8- 0.7- 090924 D21 0.7- 1.2+ 091020 704 1.9+ 0.0
090915 291 0.2- 0.2- 090924 D21 0.2+ 0.0 091020 704 0.8+ 1.3+
090915 704 0.1- 1.3+ 090925 691 0.9- 0.3+ 091020 704 1.8+ 0.9-
090915 291 0.8+ 0.8+ 090925 691 0.4- 0.2- 091123 291 0.3- 0.7-
090915 704 0.0 1.4+ 090925 691 0.5- 0.2- 091123 291 0.0 0.2+
090915 854 0.2- 0.4- 090925 703 0.3- 0.5+ 091123 291 0.1+ 0.6+
Ephemeris:
2009 RB4 a,e,i = 1.64, 0.30, 10 q = 1.1458
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2010 04 14 03 45.85 +13 05.3 2.885 2.128 34.0 15.3 22.9
2010 04 24 04 04.88 +14 06.8 2.953 2.131 29.1 13.3 22.9
2010 05 04 04 24.28 +15 00.0 3.009 2.131 24.3 11.2 22.8
2010 05 14 04 44.01 +15 44.1 3.054 2.130 19.7 9.2 22.8
Timothy B. Spahr (C) Copyright 2010 MPC M.P.E.C. 2010-H42
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