[Iaude] MPEC X138: 2009 XL8 [a=1.24,e=0.48,i=13.7,H=22.5]
mpec at marsden.cfa.harvard.edu
mpec at marsden.cfa.harvard.edu
Sat Dec 12 13:10:23 EST 2020
M.P.E.C. 2020-X138 Issued 2020 December 12, 18:07 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 at CFA.HARVARD.EDU
URL https://www.minorplanetcenter.net/ ISSN 1523-6714
2009 XL8
Revision to MPEC 2009-Y9
Additional Observations:
K09X08L C2020 12 11.40749003 47 19.687+36 33 12.44 20.86wUEX138F52
K09X08L C2020 12 11.41774003 47 16.259+36 32 46.20 21.03wUEX138F52
K09X08L C2020 12 11.42801503 47 12.823+36 32 19.67 20.70wUEX138F52
K09X08L C2020 12 11.43828703 47 09.410+36 31 52.95 20.84wUEX138F52
K09X08L KC2020 12 12.24926703 42 50.70 +35 56 16.2 21.10GVEX138I52
K09X08L KC2020 12 12.25094903 42 50.15 +35 56 11.6 20.88GVEX138I52
Observer details:
F52 Pan-STARRS 2, Haleakala. Observers J. Bulger, T. Dukes, T. Lowe, A.
Schultz, M. Willman. Measurers K. Chambers, S. Chastel, T. de Boer, L.
Denneau, J. Fairlamb, H. Flewelling, M. Huber, C.-C. Lin, E. Magnier, Y.
Ramanjooloo, R. Wainscoat, R. Weryk. 1.8-m Ritchey-Chretien + 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
201211 F52 15+ 4+ 201212 I52 15+ 4+ MPO167801 +8.88 days
Orbital elements:
2009 XL8 Earth MOID = 0.0357 AU
Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Veres
M 302.51086 (2000.0) P Q
n 0.71477427 Peri. 283.34962 -0.94443738 +0.22806323
a 1.2388635 Node 270.21986 -0.12355730 -0.91363391
e 0.4801467 Incl. 13.69175 -0.30458437 -0.33654157
P 1.38 H 22.5 G 0.15 U 5
Residuals in seconds of arc
091215 704 0.6+ 1.1+ 091216 H26 1.0- 0.2+ 091216 926 0.1- 0.1+
091215 704 0.5- 0.6+ 091216 H26 0.1- 0.2- 091216 926 0.1+ 0.5+
091215 704 0.1- 0.7+ 091216 H26 0.5- 0.2+ 091216 926 0.1+ 0.3+
091215 704 0.7+ 1.1+ 091216 H01 0.1- 0.0 091220 448 0.0 0.1+
091216 B33 0.5+ 0.3+ 091216 H01 0.1- 0.1- 091220 448 0.0 0.4-
091216 B33 0.1+ 0.7+ 091216 H01 0.1+ 0.1- 091220 448 0.0 0.0
091216 204 0.1- 0.5- 091216 H01 0.1- 0.0 091220 448 0.1- 0.4+
091216 B33 0.1+ 0.7- 091216 932 0.4+ 0.1+ 201211 F52 0.1+ 0.2-
091216 204 0.2- 0.7- 091216 932 0.3+ 0.2- 201211 F52 0.0 0.1-
091216 473 0.5+ 0.7- 091216 932 0.3- 0.3- 201211 F52 0.0 0.0
091216 473 0.3+ 0.7- 091216 932 0.3+ 0.1+ 201211 F52 0.1+ 0.0
091216 H26 1.1- 0.5- 091216 H21 0.3- 0.0 201212 I52 0.2- 0.1+
091216 H26 0.5+ 0.0 091216 H21 0.1- 0.2- 201212 I52 0.0 0.0
091216 H26 0.3+ 0.7- 091216 H21 0.0 0.1-
Ephemeris:
2009 XL8 a,e,i = 1.24, 0.48, 14 q = 0.6440
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2020 11 12 05 22 50.4 +42 49 47 0.5112 1.4284 142.2 25.1 23.0
...
2020 11 27 04 50 26.0 +42 15 18 0.3655 1.3315 157.4 16.6 21.8
...
2020 12 05 04 19 04.1 +40 04 40 0.3022 1.2754 161.4 14.3 21.2
...
2020 12 11 03 49 29.7 +36 50 07 0.2629 1.2315 157.4 17.9 21.0
2020 12 12 03 44 11.3 +36 07 25 0.2571 1.2240 156.1 19.0 21.0
2020 12 13 03 38 48.2 +35 21 29 0.2515 1.2164 154.6 20.3 20.9
...
2020 12 19 03 05 36.0 +29 35 39 0.2230 1.1704 143.3 30.1 20.9
...
2020 12 27 02 22 17.5 +18 57 44 0.1986 1.1067 124.0 47.5 21.0
...
2021 01 11 01 12 17.5 -05 18 01 0.1910 0.9822 84.1 84.8 21.8
A. U. Tomatic (C) Copyright 2020 MPC M.P.E.C. 2020-X138
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