MPEC 2008-K28 : 2006 HX122
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M.P.E.C. 2008-K28 Issued 2008 May 23, 18:51 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.cfa.harvard.edu/iau/mpc.html ISSN 1523-6714
2006 HX122
Revision to MPEC 2006-L42
Additional Observations:
K06HC2X C2007 06 16.01531 15 26 18.80 -22 20 32.1 EK028304
K06HC2X C2007 06 16.08909 15 26 18.55 -22 20 30.7 EK028304
K06HC2X C2007 07 16.07986 15 25 00.08 -22 13 19.9 EK028568
Observer details:
304 Las Campanas Observatory. Observers J. L. Elliot, E. Adams. Measurer
S. D. Kern. Clay 6.5-m telescope + CCD.
568 Mauna Kea. Observer S. S. Sheppard. Dupont 2.5-m reflector + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc and reference and Delta-T
070616 304 25.4- 4.7+ 070716 568 22.1- 3.2+ MPO111170
Orbital elements:
2006 HX122
Epoch 2008 May 14.0 TT = JDT 2454600.5 MPC
M 35.34732 (2000.0) P Q
n 0.00169365 Peri. 258.57523 -0.83534432 -0.50827994
a 69.7034608 Node 250.56467 +0.54972599 -0.77160019
e 0.4770554 Incl. 12.83010 +0.00109834 -0.38247176
P 582 H 5.9 G 0.15 U 5
Residuals in seconds of arc
060427 807 0.1- 0.2- 060620 304 0.1- 0.1- 070616 304 0.0 0.1-
060427 807 0.1- 0.3+ 060821 807 0.1- 0.2+ 070616 304 0.1+ 0.1+
060428 807 0.1+ 0.1- 060822 807 0.3+ 0.4+ 070716 568 0.1- 0.0
060620 304 0.0 0.2- 060823 807 0.1- 0.3-
Ephemeris:
2006 HX122 a,e,i = 69.70, 0.48, 13 q = 36.451
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2008 05 14 15 32.67 -22 31.2 51.422 52.429 175.7 0.1 23.1
2008 05 24 15 32.00 -22 28.5 51.437 52.441 172.3 0.1 23.1
2008 06 03 15 31.34 -22 25.7 51.481 52.452 163.0 0.3 23.1
2008 06 13 15 30.72 -22 23.0 51.553 52.463 153.4 0.5 23.2
2008 06 23 15 30.17 -22 20.4 51.651 52.474 143.8 0.7 23.2
2008 07 03 15 29.69 -22 18.0 51.772 52.485 134.2 0.8 23.2
2008 07 13 15 29.32 -22 15.8 51.913 52.496 124.6 0.9 23.2
2008 07 23 15 29.06 -22 14.0 52.070 52.508 115.0 1.0 23.2
2008 08 02 15 28.92 -22 12.6 52.240 52.519 105.4 1.1 23.3
2008 08 12 15 28.91 -22 11.6 52.417 52.530 95.8 1.1 23.3
2008 08 22 15 29.03 -22 11.0 52.597 52.541 86.3 1.1 23.3
2008 09 01 15 29.28 -22 10.9 52.776 52.552 76.7 1.1 23.3
2008 09 11 15 29.65 -22 11.3 52.947 52.563 67.1 1.0 23.3
2008 09 21 15 30.15 -22 12.1 53.108 52.575 57.5 0.9 23.3
2008 10 01 15 30.75 -22 13.3 53.253 52.586 47.8 0.8 23.3
2008 10 11 15 31.44 -22 15.0 53.378 52.597 38.1 0.7 23.3
This apparent 2:7 Neptune librator remains more than 23 AU from Neptune
over a 14 000-year period.
Brian G. Marsden (C) Copyright 2008 MPC M.P.E.C. 2008-K28
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