MPEC 2006-H30 : 2001 XT254, 2001 XH255
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M.P.E.C. 2006-H30 Issued 2006 Apr. 22, 20:12 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.
Supported in part by the Brinson Foundation
Supported in part by the TABASGO Foundation
Prepared using the Tamkin Foundation Computer Network
MPC@CFA.HARVARD.EDU
URL http://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714
2001 XT254, 2001 XH255
Revision to MPEC 2002-A76, 2002-B12
Additional Observations:
K01XP4T C2003 12 24.45924 07 28 41.38 +22 22 42.2 23.2 g EH030568
K01XP4T C2003 12 24.48237 07 28 41.26 +22 22 42.5 23.2 g EH030568
K01XP4T C2003 12 24.50560 07 28 41.14 +22 22 42.8 23.2 g EH030568
K01XP4T C2003 12 25.49954 07 28 35.62 +22 22 54.6 EH030568
K01XP4T C2004 04 15.17290 07 22 22.45 +22 34 34.0 EH030675
K01XP4T C2004 04 15.22425 07 22 22.56 +22 34 33.8 EH030675
K01XP4T C2004 04 16.20829 07 22 24.54 +22 34 29.2 EH030675
K01XP4T C2005 01 08.35469 07 35 21.92 +22 07 46.1 22.8 r EH030568
K01XP4T C2005 01 08.39254 07 35 21.68 +22 07 46.5 22.8 r EH030568
K01XP4T C2005 01 08.43034 07 35 21.47 +22 07 47.0 22.8 r EH030568
K01XP4T C2005 01 15.37010 07 34 40.67 +22 09 18.9 23.4 r EH030568
K01XP4T C2005 01 15.37762 07 34 40.62 +22 09 18.9 23.2 r EH030568
K01XP4T C2006 01 28.43819 07 41 37.38 +21 52 40.7 EH030675
K01XP4T C2006 01 29.26806 07 41 32.69 +21 52 51.6 EH030675
K01XP4T C2006 01 29.27370 07 41 32.63 +21 52 51.8 23 R EH030675
K01XP5H C2003 12 24.46344 07 31 22.81 +23 23 23.4 23.1 g EH030568
K01XP5H C2003 12 24.48664 07 31 22.68 +23 23 23.7 23.3 g EH030568
K01XP5H C2003 12 24.50988 07 31 22.52 +23 23 24.1 23.6 g EH030568
K01XP5H C2003 12 25.50403 07 31 16.47 +23 23 37.5 24.0 g EH030568
K01XP5H C2004 04 15.19439 07 24 13.91 +23 33 49.8 EH030675
K01XP5H C2004 04 15.23969 07 24 14.00 +23 33 49.3 EH030675
K01XP5H C2005 01 08.35280 07 37 50.14 +23 04 04.1 23.5 r EH030568
K01XP5H C2005 01 08.39064 07 37 49.89 +23 04 04.6 23.6 r EH030568
K01XP5H C2005 01 08.42845 07 37 49.64 +23 04 05.2 23.4 r EH030568
K01XP5H C2005 01 15.37575 07 37 04.49 +23 05 43.4 23.9 r EH030568
K01XP5H C2006 01 29.32339 07 43 42.64 +22 44 45.3 EH030675
K01XP5H C2006 01 29.32971 07 43 42.61 +22 44 45.2 EH030675
K01XP5H C2006 01 29.42638 07 43 42.00 +22 44 46.6 EH030675
K01XP5H C2006 01 29.43285 07 43 41.98 +22 44 46.6 EH030675
Observer details:
568 Mauna Kea. Observers CFHT Legacy Survey Queue, J. Kavelaars. Measurers
L. Allen, B. Gladman, J.-M. Petit, J. Kavelaars. 3.5-m
Canada-France-Hawaii Telescope + CCD, 8-m Gemini North telescope + CCD.
675 Palomar. Observers P. Nicholson, B. Gladman, J.-L. Margot, P. Benavidez,
C. Chan. Measurer B. Gladman. 5-m Hale reflector + CCD.
Orbital elements:
2001 XT254
Epoch 2006 Mar. 6.0 TT = JDT 2453800.5 MPC
M 350.76927 (2000.0) P Q
n 0.00255145 Peri. 133.46261 -0.68166818 -0.73166146
a 53.0409932 Node 359.51151 +0.66865148 -0.62292083
e 0.3237316 Incl. 0.51753 +0.29704157 -0.27684137
P 386 H 7.6 G 0.15 U 3
Residuals in seconds of arc
011209 568 0.1+ 0.1- 031224 568 0.1+ 0.0 050108 568 0.1+ 0.0
011209 568 0.2- 0.0 031224 568 0.2+ 0.0 050115 568 0.2- 0.3+
011209 568 0.1+ 0.1- 031225 568 0.0 0.0 050115 568 0.3- 0.2+
020109 568 0.1+ 0.0 040415 675 0.0 0.3- 060128 675 0.5+ 0.0
020109 568 0.0 0.1+ 040415 675 0.1+ 0.2- 060129 675 0.0 0.1-
020206 568 0.2- 0.1+ 040416 675 0.1- 0.1- 060129 675 0.4- 0.0
020206 568 0.1+ 0.1+ 050108 568 0.1+ 0.1+
031224 568 0.1- 0.1- 050108 568 0.1- 0.0
2001 XH255
Epoch 2006 Mar. 6.0 TT = JDT 2453800.5 MPC
M 299.42863 (2000.0) P Q
n 0.00476535 Peri. 219.82815 -0.99814815 +0.05300475
a 34.9735485 Node 323.17746 -0.03483638 -0.90030801
e 0.0771082 Incl. 2.85437 -0.04986674 -0.43201387
P 207 H 8.4 G 0.15 U 3
Residuals in seconds of arc
011211 568 0.1+ 0.1- 031224 568 0.3- 0.0 050115 568 0.0 0.1-
011211 568 0.0 0.0 031225 568 0.1+ 0.2+ 060129 675 0.2- 0.2+
011211 568 0.2+ 0.0 040415 675 0.0 0.0 060129 675 0.1- 0.0
020109 568 0.2+ 0.2+ 040415 675 0.0 0.1- 060129 675 0.1- 0.1+
020109 568 0.3- 0.1+ 050108 568 0.1+ 0.0 060129 675 0.2+ 0.0
031224 568 0.2- 0.1- 050108 568 0.1+ 0.1-
031224 568 0.0 0.1- 050108 568 0.1+ 0.0
Ephemerides:
2001 XT254 a,e,i = 53.04, 0.32, 1 q = 35.870
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2006 04 15 07 38.25 +21 59.8 36.364 36.340 87.9 1.6 23.4
2006 04 25 07 38.59 +21 58.9 36.530 36.338 78.2 1.6 23.4
2006 05 05 07 39.11 +21 57.5 36.691 36.335 68.6 1.5 23.4
2006 05 15 07 39.81 +21 55.7 36.841 36.332 59.1 1.4 23.4
2006 05 25 07 40.66 +21 53.6 36.977 36.330 49.7 1.2 23.4
2006 06 04 07 41.66 +21 51.1 37.095 36.327 40.3 1.0 23.4
2006 06 14 07 42.77 +21 48.3 37.192 36.325 31.0 0.8 23.4
2001 XH255 a,e,i = 34.97, 0.08, 3 q = 32.277
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2006 04 15 07 39.94 +22 50.3 33.825 33.807 88.1 1.7 23.9
2006 04 25 07 40.27 +22 49.0 33.992 33.805 78.4 1.7 23.9
2006 05 05 07 40.81 +22 47.2 34.154 33.803 68.8 1.6 23.9
2006 05 15 07 41.54 +22 44.9 34.305 33.801 59.3 1.5 23.9
2006 05 25 07 42.43 +22 42.3 34.441 33.798 49.9 1.3 23.9
2006 06 04 07 43.48 +22 39.4 34.560 33.796 40.6 1.1 23.9
2006 06 14 07 44.65 +22 36.1 34.658 33.794 31.3 0.9 23.9
The 4/5 Neptune librator 2001 XH255 remains more than 7 AU from Neptune
over a 14 000-year period.
Brian G. Marsden (C) Copyright 2006 MPC M.P.E.C. 2006-H30
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