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: 168700
# Created Fri Nov 22 02:06:57 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 23 observations of 23
# Arc: 18.10y
# First observation: 2000/03/03
# Last observation: 2018/04/10
# Chi-squared of fit: 54.54 DOF: 40 RMS: 0.27
# Min/Max residuals: -0.62 0.42
# Exact a, adot, b, bdot, g, gdot:
1.791454E-05 4.279721E-02 1.636704E-06 2.750026E-03 3.388987E-02 -3.641163E-04
# 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
3.403282 -162.741067 0.554234 0.048974 -0.827454 2451606.975976
# Heliocentric elements and errors
Epoch: 2451606.5000 = 2000/03/03
Mean Anomaly: 355.04412 +/- 0.000
Argument of Peri: 49.57563 +/- 0.000
Long of Asc Node: 154.78634 +/- 0.000
Inclination: 4.99695 +/- 0.000
Eccentricity: 0.22594113 +/- 0.0000
Semi-Major Axis: 39.11518560 +/- 0.0000
Time of Perihelion: 2452836.5840 +/- 0.0
Perihelion: 30.27745632 +/- 0.0000
Aphelion: 47.95291488 +/- 0.0000
Period (y) 244.6393 +/- 0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -29.07810858 +/- 0.0000
Ecliptic Y -8.45301996 +/- 0.0000
Ecliptic Z 1.75174170 +/- 0.0000
Ecliptic XDOT 0.00106053 +/- 0.0000
Ecliptic YDOT -0.00328221 +/- 0.0000
Ecliptic ZDOT 0.00022014 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 30.33248198 +/- 0.0000
Geocenter to KBO 29.50736907 +/- 0.0000
# Hcoef: 8.25
The following table shows the complete astrometric record for 168700. 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 (168700) followed by the observatory code and reference code for the source of the astrometry.
2000 03 03.475233 13 08 51.28 -03 37 54.3 168700 645 C~1SGa 2000 03 03.476062 13 08 51.28 -03 37 54.3 168700 645 C~1SGa 2000 03 03.478550 13 08 51.26 -03 37 54.2 168700 645 C~1SGa 2000 04 02.52104 13 06 09.84 -03 19 08.0 23.0R 168700 568 Cb4443 2000 04 02.55109 13 06 09.63 -03 19 06.7 22.7R 168700 568 Cb4443 2000 04 07.54897 13 05 40.08 -03 15 54.0 23.1R 168700 568 Cb4443 2000 04 07.58752 13 05 39.85 -03 15 52.4 23.2R 168700 568 Cb4443 2000 05 07.37446 13 02 54.01 -02 58 53.6 22.9R 168700 568 Cb5789 2000 05 07.41719 13 02 53.78 -02 58 52.8 23.1R 168700 568 Cb5789 2000 05 30.37669 13 01 22.33 -02 50 40.5 23.1R 168700 568 Cb6999 2000 05 30.41147 13 01 22.23 -02 50 40.2 23.2R 168700 568 Cb6999 2001 02 17.15273 13 19 04.03 -04 32 01.7 22.5R 168700 950 Cc6646 2001 02 17.19078 13 19 03.92 -04 32 00.7 22.4R 168700 950 Cc6646 2001 02 19.14697 13 18 57.98 -04 31 09.4 168700 950 Cc6646 2002 02 04.63343 13 28 46.83 -05 22 38.1 22.4R 168700 568 Cf1719 2002 02 05.63624 13 28 45.58 -05 22 21.8 168700 568 Cf1719 2006 05 25.207429 13 57 57.56 -07 29 08.3 22.7V 168700 645 C~1SGa 2006 05 25.208258 13 57 57.56 -07 29 08.3 21.7V 168700 645 C~1SGa 2006 05 25.210746 13 57 57.55 -07 29 08.3 23.4V 168700 645 C~1SGa 2007 07 11.98685 14 05 11.27 -08 05 55.8 168700 304 Cv1966 2007 07 12.14534 14 05 11.21 -08 05 56.7 168700 304 Cv1967 2018 04 10.36887 15 56 08.183 -15 11 32.40 23.2R 168700 G37 C~2cDj 2018 04 10.45547 15 56 07.811 -15 11 30.66 168700 G37 C~2cDj
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 0.36 0.00 -0.23
2 0.0000 0.00 0.42 0.00 -0.26
3 0.0000 0.00 0.29 0.00 -0.24
4 0.0823 0.00 -0.17 0.00 0.23
5 0.0823 0.00 -0.62 0.00 0.36
6 0.0960 0.00 -0.39 0.00 0.18
7 0.0961 0.00 -0.37 0.00 0.30
8 0.1777 0.00 -0.05 0.00 0.16
9 0.1778 0.00 -0.29 0.00 -0.25
10 0.2407 0.00 0.31 0.00 -0.11
11 0.2408 0.00 0.40 0.00 -0.30
12 0.9601 0.00 0.27 0.00 0.16
13 0.9602 0.00 0.35 0.00 0.19
14 0.9656 0.00 0.38 0.00 0.16
15 1.9251 0.00 -0.42 0.00 -0.23
16 1.9279 0.00 -0.52 0.00 -0.41
17 6.2251 0.00 -0.08 0.00 0.02
18 6.2251 0.00 -0.02 0.00 -0.00
19 6.2251 0.00 0.02 0.00 -0.06
20 7.3553 0.00 0.15 0.00 0.13
21 7.3557 0.00 0.10 0.00 0.23
22 18.1024 0.00 -0.09 0.00 -0.05
23 18.1026 0.00 0.05 0.00 -0.04
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.
168700 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.104 39.104 39.104 ecceobj 0.226 0.226 0.226 incobj 4.997 4.997 4.997 qmin 29.588 29.588 29.588 qmax 49.729 49.730 49.729 amean 39.455 39.456 39.456 amin 39.078 39.078 39.078 amax 39.913 39.914 39.913 emean 0.221 0.221 0.221 emin 0.195 0.195 0.195 emax 0.248 0.248 0.248 imean 5.533 5.533 5.533 imin 3.649 3.649 3.649 imax 6.913 6.914 6.913 excite_mean 0.242 0.242 0.242 fracstop 1.000 1.000 1.000 cjmean 2.985 2.985 2.985 libcent 0 180.5 180.4 180.6 libamp 0 48.3 48.2 48.4 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 203.9 203.8 203.8 kozaiamp 180.0 179.9 180.0