MPEC 2015-T39 : 2013 RB21
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M.P.E.C. 2015-T39 Issued 2015 Oct. 9, 15:16 UT
The Minor Planet Electronic Circulars contain information on unusual
minor planets and routine data on comets. They are published
on behalf of Division F 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 https://www.minorplanetcenter.net/ ISSN 1523-6714
2013 RB21
Revision to MPEC 2013-R45
Additional Observations:
K13R21B 2C2015 09 17.40034821 00 50.043-10 24 44.16 23.9 RtET039568
K13R21B 2C2015 09 17.40777221 00 49.472-10 24 55.04 23.7 RtET039568
K13R21B 2C2015 10 07.28355920 45 06.593-17 37 03.86 23.8 RtET039568
K13R21B 2C2015 10 07.29380120 45 06.379-17 37 15.18 23.4 RtET039568
K13R21B 2C2015 10 07.30393620 45 06.134-17 37 26.58 23.5 RtET039568
K13R21B 2C2015 10 07.31415220 45 05.921-17 37 37.58 23.6 RtET039568
Observer details:
568 Mauna Kea. Observers J. Kleyner, D. J. Tholen, Y. Ramanjooloo, D. Hung.
Measurer D. J. Tholen. 2.24-m University of Hawaii reflector.
First and last observations above in comparison with prediction:
Residuals in seconds of arc, reference and Delta-T
150917 568 21.6+ 9.2- 151007 568 16.0+ 12.9- MPO288535 -0.018 day
Orbital elements:
2013 RB21 Earth MOID = 0.1173 AU
Epoch 2016 Jan. 13.0 TT = JDT 2457400.5 MPC
M 341.05421 (2000.0) P Q
n 0.46394647 Peri. 308.03123 -0.35073022 -0.92243394
a 1.6525609 Node 160.50316 +0.93642725 -0.34368260
e 0.5555585 Incl. 28.95282 -0.00960859 +0.17606223
P 2.12 H 21.1 G 0.15 U 2
Residuals in seconds of arc
130901 F51 0.2+ 0.0 130913 291 0.3- 0.1+ 131010 807 0.8+ 0.5+
130901 F51 0.3+ 0.2+ 130913 291 0.4- 0.0 140220 291 0.0 0.4+
130901 F51 0.2+ 0.1- 130914 291 0.5- 0.2- 140220 291 0.2- 0.5+
130902 568 0.1- 0.2- 130914 291 0.4- 0.0 150917 568 0.1- 0.0
130902 568 0.1- 0.1- 130914 291 0.2- 0.5+ 150917 568 0.1- 0.0
130902 568 0.2- 0.2- 130923 807 0.7+ 0.2- 151007 568 0.0 0.0
130905 291 0.3- 0.0 130923 807 0.6+ 0.6- 151007 568 0.2+ 0.0
130905 291 0.3- 0.6+ 130923 807 0.6+ 0.7- 151007 568 0.0 0.2-
130905 291 0.2- 0.1+ 131010 807 0.1- 0.1- 151007 568 0.2+ 0.1+
130913 291 0.3- 0.1+ 131010 807 0.2+ 0.4+
Ephemeris:
2013 RB21 a,e,i = 1.65, 0.56, 29 q = 0.7345
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2015 09 09 21 12 23.6 -06 53 42 0.9868 1.9321 151.3 14.5 23.3
...
2015 09 24 20 53 36.7 -13 01 24 1.0113 1.8376 131.6 24.1 23.6
...
2015 10 02 20 47 28.7 -15 54 29 1.0420 1.7841 121.7 28.5 23.7
...
2015 10 08 20 44 53.8 -17 50 07 1.0701 1.7426 114.7 31.4 23.8
2015 10 09 20 44 38.3 -18 08 09 1.0751 1.7356 113.5 31.9 23.8
2015 10 10 20 44 25.7 -18 25 50 1.0801 1.7285 112.4 32.3 23.8
...
2015 10 16 20 44 11.7 -20 04 37 1.1115 1.6854 106.0 34.7 23.9
...
2015 10 24 20 46 31.8 -21 57 32 1.1541 1.6261 98.1 37.3 24.0
...
2015 11 08 20 58 18.1 -24 37 41 1.2274 1.5091 85.0 40.9 24.0
A. U. Tomatic (C) Copyright 2015 MPC M.P.E.C. 2015-T39
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