MPEC 2020-R170 : 2009 RU1
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M.P.E.C. 2020-R170 Issued 2020 September 15, 18:06 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
2009 RU1
Revision to MPEC 2009-R52
Additional Observations:
K09R01U C2020 09 11.23738320 16 48.272-10 02 06.89 19.87GVER170F51
K09R01U C2020 09 11.26428520 17 14.267-10 01 19.81 19.70GVER170F51
K09R01U C2020 09 11.27770320 17 27.142-10 00 56.22 19.74GVER170F51
K09R01U C2020 09 15.12395 21 07 52.86 -08 18 28.4 20.5 GVER170G96
K09R01U C2020 09 15.13514 21 07 59.29 -08 18 13.3 20.1 GVER170G96
K09R01U C2020 09 15.14075 21 08 02.51 -08 18 05.6 20.3 GVER170G96
K09R01U C2020 09 15.23367 21 08 55.08 -08 15 58.1 19.5 GVER170I52
K09R01U C2020 09 15.23515 21 08 55.90 -08 15 56.0 19.4 GVER170I52
K09R01U C2020 09 15.23663 21 08 56.72 -08 15 54.4 20.4 GVER170I52
Observer details:
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, K. Chambers, T. Lowe, A.
Schultz, M. Willman. Measurers S. Chastel, M. Huber, Y. Ramanjooloo, R.
Wainscoat, R. Weryk. 1.8-m Ritchey-Chretien + CCD.
G96 Mt. Lemmon Survey. Observer D. Rankin. Measurers E. J. Christensen, G.
A. Farneth, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. Groeller, R. A.
Kowalski, S. M. Larson, G. J. Leonard, T. A. Pruyne, D. Rankin, R. L.
Seaman, F. C. Shelly, K. W. Wierzchos. 1.5-m reflector + 10K CCD.
I52 Steward Observatory, Mt. Lemmon Station. Observer D. C. Fuls. Measurers
E. J. Christensen, G. A. Farneth, D. C. Fuls, A. R. Gibbs, A. D. Grauer,
H. Groeller, R. A. Kowalski, S. M. Larson, G. J. Leonard, T. A. Pruyne, D.
Rankin, R. L. Seaman, F. C. Shelly, K. W. Wierzchos. 1.0-m reflector +
CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or zero decimals in degrees), reference and Delta-T
200911 F51 83- 27- 200915 I52 65- 23- MPO162558 -7.99 days
Orbital elements:
2009 RU1 Earth MOID = 0.0091 AU
Epoch 2020 May 31.0 TT = JDT 2459000.5 Veres
M 332.27376 (2000.0) P Q
n 0.62687681 Peri. 329.99079 +0.01176450 +0.99984818
a 1.3521180 Node 300.68053 -0.91441970 +0.00555648
e 0.3802215 Incl. 0.85632 -0.40459636 +0.01651464
P 1.57 H 24.2 G 0.15 U 3
Residuals in seconds of arc
090912 703 0.7+ 0.1+ 090912 J04 0.0 0.1+ 090924 291 0.2- 0.3-
090912 703 1.2- 0.6- 090912 235 0.6- 0.8+ 090924 291 0.5- 0.1-
090912 703 0.1+ 0.7+ 090912 235 0.3- 0.1+ 090924 291 0.0 0.1-
090912 703 1.3- 0.3- 090912 595 0.8+ 0.3+ 090925 291 0.2- 0.1-
090912 587 0.7+ 0.4- 090913 595 0.3+ 0.2- 090925 291 0.0 0.6-
090912 587 0.4- 0.3- 090913 H26 1.2+ 0.3+ 090925 291 0.2+ 0.2-
090912 587 0.7+ 1.0- 090913 H26 0.1+ 0.3+ 200911 F51 0.2- 0.2-
090912 587 0.0 0.2+ 090913 H26 0.4+ 0.2+ 200911 F51 0.3+ 0.1-
090912 J95 0.1+ 0.5+ 090913 H36 0.8- 0.7- 200911 F51 0.1+ 0.1-
090912 J95 0.0 0.0 090913 H36 0.4- 0.3- 200915 G96 0.3- 0.4-
090912 J04 0.2+ 0.1+ 090915 H55 0.4+ 0.1- 200915 G96 0.0 0.4-
090912 J04 0.0 0.2+ 090915 H55 0.4+ 0.4+ 200915 G96 0.2+ 0.3-
090912 J04 0.1- 0.2+ 090915 H55 (0.5+ 1.7+) 200915 I52 0.4+ 0.0
090912 J95 0.6- 0.2+ 090918 H55 0.2+ 0.1- 200915 I52 0.2+ 0.0
090912 J04 0.2+ 0.1+ 090918 H55 0.0 0.1- 200915 I52 0.0 0.4-
090912 J04 0.0 0.2+ 090918 H55 0.2+ 0.2+
Ephemeris:
2009 RU1 a,e,i = 1.35, 0.38, 1 q = 0.8380
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2020 08 16 12 29 39.6 -01 29 28 0.1409 0.9168 44.1 129.8 25.4
...
2020 08 31 15 10 55.6 -09 06 01 0.05688 0.9917 70.3 106.6 21.9
...
2020 09 08 19 08 08.1 -11 33 50 0.05518 1.0369 120.8 56.5 20.0
...
2020 09 14 20 55 39.1 -08 44 31 0.08275 1.0721 141.7 35.5 20.4
2020 09 15 21 06 34.2 -08 20 18 0.08848 1.0781 143.5 33.7 20.5
2020 09 16 21 16 11.9 -07 58 03 0.09442 1.0841 145.0 32.2 20.6
...
2020 09 22 21 56 00.6 -06 17 50 0.1332 1.1203 149.2 27.3 21.3
...
2020 09 30 22 25 05.6 -04 56 27 0.1907 1.1689 148.9 26.3 22.1
...
2020 10 15 22 55 52.5 -03 16 58 0.3137 1.2593 142.0 29.2 23.5
A. U. Tomatic (C) Copyright 2020 MPC M.P.E.C. 2020-R170
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