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M.P.E.C. 2007-X62 Issued 2007 Dec. 15, 23:29 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
2007 JF43
Revision to MPEC 2007-N14
Additional Observations:
K07J43F C2002 04 13.33658 14 42 46.89 -11 46 52.7 20.5 R EX062644
K07J43F C2002 04 13.36278 14 42 46.80 -11 46 52.3 EX062644
K07J43F C2002 04 14.48946 14 42 41.70 -11 46 22.4 21 R EX062644
K07J43F C2002 05 19.28674 14 39 55.53 -11 31 12.4 20.5 R EX062644
Observer details:
644 Palomar Mountain/NEAT. Observers E. F. Helin, S. Pravdo, K. Lawrence,
M. Hicks, R. Thicksten, E. Hovland, T. Bickler, J. Schroeder, L. Scherr,
A. Deetz, K. Kuluhiwa. Measurer K. Sarneczky. 1.2-m Oschin Schmidt + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc and reference
020413 644 21.1- 6.8+ 020519 644 19.2- 5.5+ MPO124511
Orbital elements:
2007 JF43
Epoch 2007 Oct. 27.0 TT = JDT 2454400.5 MPC
M 282.16829 (2000.0) P Q
n 0.00395853 Peri. 121.14464 +0.84010146 +0.52902586
a 39.5773544 Node 207.46719 -0.54238128 +0.82220936
e 0.1831691 Incl. 15.05920 +0.00721669 +0.21000814
P 249 H 5.2 G 0.15 U 5
Residuals in seconds of arc
020413 644 0.4- 0.4+ 070510 675 0.9+ 0.4+ 070621 675 0.4+ 0.2-
020413 644 0.1+ 0.1+ 070511 675 0.6+ 0.5+ 070718 675 0.3- 0.5-
020414 644 0.3+ 0.2- 070511 675 1.0- 0.3+ 070728 675 0.2- 0.1+
020519 644 0.1- 0.4- 070620 675 0.1- 0.1- 070731 675 0.1+ 0.2-
070510 675 0.2- 0.2- 070620 675 0.0 0.2-
Ephemeris:
2007 JF43 a,e,i = 39.58, 0.18, 15 q = 32.328
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2007 12 16 15 16.36 -12 21.9 40.153 39.340 33.9 0.8 21.3
2007 12 26 15 17.31 -12 24.1 40.039 39.335 43.8 1.0 21.3
2008 01 05 15 18.14 -12 25.7 39.905 39.330 53.7 1.2 21.3
2008 01 15 15 18.84 -12 26.6 39.752 39.325 63.6 1.3 21.4
2008 01 25 15 19.40 -12 26.8 39.586 39.320 73.6 1.4 21.3
2008 02 04 15 19.79 -12 26.2 39.412 39.315 83.6 1.4 21.3
2008 02 14 15 20.02 -12 24.9 39.235 39.310 93.7 1.4 21.3
2008 02 24 15 20.06 -12 22.9 39.059 39.305 103.7 1.4 21.3
2008 03 05 15 19.94 -12 20.3 38.890 39.300 113.7 1.3 21.3
2008 03 15 15 19.66 -12 17.2 38.734 39.295 123.7 1.2 21.3
2008 03 25 15 19.22 -12 13.6 38.594 39.290 133.7 1.1 21.3
2008 04 04 15 18.65 -12 09.7 38.475 39.284 143.6 0.9 21.2
2008 04 14 15 17.97 -12 05.6 38.380 39.279 153.4 0.7 21.2
2008 04 24 15 17.21 -12 01.3 38.312 39.274 162.9 0.4 21.2
2008 05 04 15 16.40 -11 57.1 38.272 39.269 171.5 0.2 21.1
2008 05 14 15 15.56 -11 53.1 38.261 39.264 172.9 0.2 21.1
2008 05 24 15 14.73 -11 49.4 38.279 39.259 165.1 0.4 21.2
2008 06 03 15 13.94 -11 46.1 38.326 39.254 155.9 0.6 21.2
2008 06 13 15 13.21 -11 43.3 38.399 39.249 146.4 0.8 21.2
2008 06 23 15 12.57 -11 41.1 38.497 39.244 136.8 1.0 21.3
2008 07 03 15 12.05 -11 39.6 38.615 39.239 127.2 1.2 21.3
2008 07 13 15 11.66 -11 38.8 38.751 39.234 117.7 1.3 21.3
2008 07 23 15 11.41 -11 38.7 38.901 39.229 108.1 1.4 21.3
2008 08 02 15 11.33 -11 39.3 39.059 39.224 98.6 1.5 21.3
2008 08 12 15 11.40 -11 40.6 39.221 39.219 89.1 1.5 21.3
2008 08 22 15 11.64 -11 42.5 39.383 39.214 79.6 1.5 21.3
2008 09 01 15 12.04 -11 45.1 39.540 39.209 70.1 1.4 21.3
2008 09 11 15 12.60 -11 48.2 39.688 39.203 60.6 1.3 21.3
2008 09 21 15 13.29 -11 51.7 39.821 39.198 51.1 1.1 21.3
2008 10 01 15 14.12 -11 55.5 39.936 39.193 41.6 1.0 21.3
2008 10 11 15 15.05 -11 59.6 40.030 39.188 32.1 0.8 21.3
This 2:3 Neptune librator remains more than 16 AU from Neptune over a
14 000-year period.
Brian G. Marsden (C) Copyright 2007 MPC M.P.E.C. 2007-X62
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