The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory.
# Object: 118702
# Created Fri May 2 02:36:20 2008
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 17 observations of 17
# Arc: 5.17y
# First observation: 2000/07/31
# Last observation: 2005/09/30
# Chi-squared of fit: 32.96 DOF: 28 RMS: 0.25
# Min/Max residuals: -0.96 0.57
# Exact a, adot, b, bdot, g, gdot:
1.828261E-05 2.893807E-02 6.312235E-06 1.230067E-02 2.542849E-02 4.745561E-03
# Covariance matrix:
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
# lat0 lon0 xBary yBary zBary JD0
3.975924 -23.144164 0.489726 0.061466 -0.886692 2451756.821653
# Heliocentric elements and errors
Epoch: 2451755.5000 = 2000/07/30
Mean Anomaly: 4.13286 +/- 0.000
Argument of Peri: 349.16304 +/- 0.000
Long of Asc Node: 327.11070 +/- 0.000
Inclination: 23.35373 +/- 0.000
Eccentricity: 0.60421120 +/- 0.0000
Semi-Major Axis: 99.15068040 +/- 0.0000
Time of Perihelion: 2447615.5928 +/- 0.0
Perihelion: 39.24272888 +/- 0.0000
Aphelion: 159.05863193 +/- 0.0000
Period (y) 987.3059 +/- 0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 36.70481349 +/- 0.0000
Ecliptic Y -16.21452280 +/- 0.0000
Ecliptic Z 2.72698627 +/- 0.0000
Ecliptic XDOT 0.00160175 +/- 0.0000
Ecliptic YDOT 0.00270629 +/- 0.0000
Ecliptic ZDOT 0.00135679 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 40.21917592 +/- 0.0000
Geocenter to KBO 39.32588765 +/- 0.0000
# Hcoef: 6.42
The following table shows the complete astrometric record for 118702. The first three columns show the date of observation. The next six columns are RA and DEC. The next column (when provided) is the observed magnitude and filter. The next column is the object name (118702) followed by the observatory code and reference code for the source of the astrometry.
2000 07 31.32091 22 28 26.03 -05 17 56.3 22.1R 118702 807 Cc0956 2000 07 31.40061 22 28 25.71 -05 17 57.8 118702 807 Cc0956 2000 08 27.14678 22 26 24.91 -05 25 43.3 22.0R 118702 807 Cc0956 2000 08 27.21908 22 26 24.56 -05 25 45.0 118702 807 Cc0956 2000 09 21.19885 22 24 30.55 -05 34 18.7 22.6R 118702 695 Cc2364 2000 09 21.28144 22 24 30.19 -05 34 20.4 118702 695 Cc2364 2001 08 20.16145 22 32 07.65 -04 07 34.4 21.0R 118702 807 Cd7641 2001 08 20.24342 22 32 07.24 -04 07 35.9 118702 807 Cd7641 2001 08 21.16817 22 32 02.95 -04 07 53.4 21.5R 118702 807 Cd7641 2001 08 21.24278 22 32 02.61 -04 07 54.8 118702 807 Cd7641 2001 09 23.15748 22 29 32.32 -04 19 17.5 118702 290 Cd7641 2001 09 23.19120 22 29 32.17 -04 19 18.3 118702 290 Cd7641 2003 07 07.45374 22 44 51.97 -01 31 05.1 23.0R 118702 568 Ci2628 2003 07 07.56360 22 44 51.70 -01 31 05.3 118702 568 Ci2628 2003 07 08.49434 22 44 49.53 -01 31 04.3 118702 568 Ci2628 2005 09 30.17329 22 48 59.49 +00 33 44.4 22.8R 118702 688 Co3359 2005 09 30.26824 22 48 59.08 +00 33 43.2 118702 688 Co3359
The following table shows the residuals to the orbit fit. The first coumn is the point number. The second column is the time, in years, measured from the first observation. The third and fifth columns are the regularized positions used in the orbit fit. The fourth and sixth columns are the residuals, in arc seconds, for RA and Dec respectively.
1 0.0000 0.00 -0.17 0.00 -0.96 2 0.0002 0.00 0.09 0.00 -0.17 3 0.0734 0.00 0.08 0.00 0.18 4 0.0736 0.00 0.05 0.00 -0.06 5 0.1420 0.00 -0.06 0.00 0.07 6 0.1423 0.00 -0.13 0.00 0.02 7 1.0536 0.00 0.47 0.00 -0.05 8 1.0539 0.00 0.11 0.00 -0.01 9 1.0564 0.00 0.03 0.00 -0.01 10 1.0566 0.00 0.22 0.00 0.01 11 1.1467 0.00 0.07 0.00 0.02 12 1.1468 0.00 -0.02 0.00 -0.08 13 2.9326 0.00 0.09 0.00 0.13 14 2.9329 0.00 -0.06 0.00 -0.20 15 2.9355 0.00 -0.11 0.00 -0.04 16 5.1659 0.00 0.21 0.00 -0.42 17 5.1662 0.00 -0.11 0.00 0.57
The following table comes from a 10My integration of the orbit of the object. Three columns are shown. The first column is the result of integrating the nominal orbit. The other two columns are based on clones of the nominal orbit that are +/- 3 sigma from the nominal orbit. If all three types agree then the classificiation is deemed secure. The basis for these calculations is described in more detail in AJ, 129, 1117 (2005). Any use made of these calculations should refer to and credit this publication and the Deep Ecliptic Survey Team.
118702 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 99.661 99.661 99.660 ecceobj 0.606 0.606 0.606 incobj 23.337 23.337 23.337 qmin 37.142 37.187 37.231 qmax 164.200 163.870 164.074 amean 98.573 98.472 98.492 amin 96.881 96.800 96.863 amax 101.179 101.038 101.110 emean 0.608 0.607 0.607 emin 0.593 0.593 0.593 emax 0.623 0.622 0.623 imean 23.837 23.842 23.842 imin 23.074 23.130 23.113 imax 24.859 24.862 24.854 fracstop 1.000 1.000 1.000 cjmean 2.933 2.933 2.933 libcent 0 -180.0 -180.0 -180.0 libamp 0 -180.0 -180.0 -180.0 libcent 1 -180.0 -180.0 -180.0 libamp 1 -180.0 -180.0 -180.0 libcent 2 -180.0 -180.0 -180.0 libamp 2 -180.0 -180.0 -180.0 libcent 3 -180.0 -180.0 -180.0 libamp 3 -180.0 -180.0 -180.0 libcent 4 -180.0 -180.0 -180.0 libamp 4 -180.0 -180.0 -180.0 kozaimean 98.9 97.8 97.7 kozaiamp 180.0 180.0 180.0