The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory. Take special note that while the original Bernstein software works with barycentric coordinates, we convert these results into a heliocentric coordinate system.
# Object: 118702
# Created Fri Nov 22 02:06:51 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 21 observations of 24
# Arc: 7.98y
# First observation: 2000/07/31
# Last observation: 2008/07/25
# Chi-squared of fit: 29.16 DOF: 36 RMS: 0.21
# Min/Max residuals: -0.43 0.86
# Exact a, adot, b, bdot, g, gdot:
1.824366E-05 2.893800E-02 6.878213E-06 1.230011E-02 2.542874E-02 4.744388E-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 -0.886691 2451756.821653
# Heliocentric elements and errors
Epoch: 2451756.5000 = 2000/07/31
Mean Anomaly: 4.13474 +/- 0.000
Argument of Peri: 349.16685 +/- 0.000
Long of Asc Node: 327.11024 +/- 0.000
Inclination: 23.35287 +/- 0.000
Eccentricity: 0.60411786 +/- 0.0000
Semi-Major Axis: 99.12738304 +/- 0.0000
Time of Perihelion: 2447616.1734 +/- 0.0
Perihelion: 39.24276067 +/- 0.0000
Aphelion: 159.01200542 +/- 0.0000
Period (y) 986.9580 +/- 0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 36.70445612 +/- 0.0000
Ecliptic Y -16.21437172 +/- 0.0000
Ecliptic Z 2.72698161 +/- 0.0000
Ecliptic XDOT 0.00160162 +/- 0.0000
Ecliptic YDOT 0.00270630 +/- 0.0000
Ecliptic ZDOT 0.00135670 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 40.21878857 +/- 0.0000
Geocenter to KBO 39.32550030 +/- 0.0000
# Hcoef: 6.62
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 2008 07 25.37324 23 07 58.05 +04 25 06.5 23.5R 118702 250 S~06HA 2008 07 25.43018 23 07 57.88 +04 25 06.4 118702 250 S~06HA 2008 07 25.43643 23 07 57.86 +04 25 06.4 118702 250 S~06HA 2008 07 25.44268 23 07 57.84 +04 25 06.3 118702 250 S~06HB 2024 11 01.08876 00 11 45.406 +19 57 46.69 23.7G 118702 G37 2024 11 01.13800 00 11 45.228 +19 57 45.18 118702 G37 2024 11 01.18433 00 11 45.061 +19 57 44.07 118702 G37
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 -0.11 0.00 0.13
2 0.0002 0.00 0.09 0.00 -0.29
3 0.0734 0.00 0.09 0.00 0.07
4 0.0736 0.00 0.06 0.00 -0.17
5 0.1420 0.00 -0.03 0.00 -0.02
6 0.1423 0.00 -0.10 0.00 -0.07
7 1.0536 0.00 0.43 0.00 -0.06
8 1.0539 0.00 0.07 0.00 -0.02
9 1.0564 0.00 -0.01 0.00 -0.02
10 1.0566 0.00 0.18 0.00 -0.00
11 1.1467 0.00 0.06 0.00 0.03
12 1.1468 0.00 -0.04 0.00 -0.07
13 2.9326 0.00 -0.10 0.00 0.27
14 2.9329 0.00 -0.25 0.00 -0.06
15 2.9355 0.00 -0.30 0.00 0.10
16 5.1659 0.00 -0.11 0.00 -0.13
17 5.1662 0.00 -0.43 0.00 0.86
18 7.9837 0.00 0.17 0.00 -0.05
19 7.9839 0.00 0.23 0.00 -0.01
20 7.9839 0.00 0.21 0.00 -0.00
21 7.9839 0.00 0.20 0.00 -0.09
22 24.2540 0.00 ( -12.18) 0.00 ( -8.78)
23 24.2541 0.00 ( -12.35) 0.00 ( -8.85)
24 24.2542 0.00 ( -12.50) 0.00 ( -8.60)
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 99.642 99.643 99.641 ecceobj 0.606 0.606 0.606 incobj 23.336 23.336 23.336 qmin 37.235 37.197 37.255 qmax 163.816 164.119 163.805 amean 98.370 98.476 98.362 amin 96.688 96.740 96.554 amax 100.984 101.131 101.050 emean 0.607 0.607 0.607 emin 0.593 0.593 0.593 emax 0.622 0.623 0.622 imean 23.850 23.844 23.847 imin 23.130 23.112 23.120 imax 24.890 24.887 24.890 excite_mean 0.729 0.730 0.729 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 97.1 97.8 97.2 kozaiamp 180.0 180.0 180.0