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: 01XZ255
# Created Wed Jun 11 01:09:07 2025
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 19 observations of 21
# Arc: 15.13y
# First observation: 2001/12/11
# Last observation: 2017/01/28
# Chi-squared of fit: 21.37 DOF: 32 RMS: 0.19
# Min/Max residuals: -0.53 0.49
# Exact a, adot, b, bdot, g, gdot:
2.468048E-05 1.033621E-01 5.524241E-07 4.218583E-03 6.613525E-02 6.304779E-03
# Covariance matrix:
1.8794E-13 -8.8520E-14 1.6305E-15 -3.5929E-15 9.8089E-14 -2.4114E-14
-8.8520E-14 9.2263E-14 -1.8478E-15 4.0078E-15 -1.0707E-13 2.6787E-14
1.6305E-15 -1.8478E-15 1.1448E-13 -6.7661E-15 1.8484E-15 -5.2574E-16
-3.5929E-15 4.0078E-15 -6.7661E-15 1.1178E-15 -4.7168E-15 1.1765E-15
9.8089E-14 -1.0707E-13 1.8484E-15 -4.7168E-15 1.5237E-13 -3.2780E-14
-2.4114E-14 2.6787E-14 -5.2574E-16 1.1765E-15 -3.2780E-14 7.9277E-15
# lat0 lon0 xBary yBary zBary JD0
1.164922 104.210840 0.408107 0.018011 -0.889573 2452255.037583
# Heliocentric elements and errors
Epoch: 2452254.5000 = 2001/12/11
Mean Anomaly: 87.10883 +/- 0.232
Argument of Peri: 293.75788 +/- 0.000
Long of Asc Node: 77.81368 +/- 0.000
Inclination: 2.60718 +/- 0.000
Eccentricity: 0.03555959 +/- 0.0006
Semi-Major Axis: 16.02879096 +/- 0.0001
Time of Perihelion: 2446582.8519 +/- 15.1
Perihelion: 15.45881378 +/- 0.0090
Aphelion: 16.59876814 +/- 0.0090
Period (y) 64.1740 +/- 0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -3.53263904 +/- 0.0002
Ecliptic Y 15.62301117 +/- 0.0002
Ecliptic Z 0.30740508 +/- 0.0000
Ecliptic XDOT -0.00421980 +/- 0.0000
Ecliptic YDOT -0.00080098 +/- 0.0000
Ecliptic ZDOT 0.00018012 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 16.02036486 +/- 0.0002
Geocenter to KBO 15.12054210 +/- 0.0003
# Hcoef: 10.86
The following table shows the complete astrometric record for 01XZ255. 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 (01XZ255) followed by the observatory code and reference code for the source of the astrometry.
2001 12 11.53684 07 02 15.64 +23 50 22.6 23.2R 01XZ255 568 Cf2430 2001 12 11.56015 07 02 15.38 +23 50 22.9 01XZ255 568 Cf2430 2001 12 11.58345 07 02 15.10 +23 50 23.3 01XZ255 568 Cf2430 2001 12 19.42206 07 00 41.35 +23 53 12.0 22.6R 01XZ255 568 Cf2430 2001 12 19.45198 07 00 40.97 +23 53 12.5 22.7R 01XZ255 568 Cf2430 2002 01 08.31481 06 56 24.22 +24 00 05.8 22.6R 01XZ255 568 Cf2430 2002 01 08.33928 06 56 23.87 +24 00 06.4 22.8R 01XZ255 568 Cf2430 2002 02 15.48741 06 49 19.32 +24 09 11.7 01XZ255 568 Cf2430 2002 02 15.51343 06 49 19.08 +24 09 12.5 01XZ255 568 Cf2430 2002 10 31.54044 07 32 05.64 +23 05 42.4 23.0R 01XZ255 568 Cg5849 2002 11 01.55572 07 32 04.64 +23 05 51.7 23.1R 01XZ255 568 Cg5849 2003 03 03.24506 07 13 00.99 +23 48 51.9 01XZ255 568 Ch6100 2003 03 03.26162 07 13 00.89 +23 48 52.2 01XZ255 568 Ch6100 2015 01 25.573472 11 51 05.95 +03 54 16.4 01XZ255 T09 C~8r3J 2015 01 25.630699 11 51 05.64 +03 54 18.8 01XZ255 T09 C~8r3J 2017 01 28.59808 12 30 53.54 -00 31 22.8 22.6z 01XZ255 T09 C~8PvK 2017 01 28.61691 12 30 53.46 -00 31 22.1 22.6z 01XZ255 T09 C~8PvK 2017 01 28.64799 12 30 53.35 -00 31 21.3 22.5z 01XZ255 T09 C~8PvK 2017 01 28.65069 12 30 53.34 -00 31 21.1 22.5z 01XZ255 T09 C~8PvL 2025 05 27.25600 15 02 02.840 -15 46 57.67 22.8G 01XZ255 G37 2025 05 27.31397 15 02 02.209 -15 46 54.61 01XZ255 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 0.02 0.00 0.09
2 0.0001 0.00 0.21 0.00 -0.09
3 0.0001 0.00 0.10 0.00 -0.18
4 0.0216 0.00 -0.05 0.00 0.10
5 0.0217 0.00 -0.08 0.00 -0.06
6 0.0761 0.00 -0.15 0.00 -0.10
7 0.0761 0.00 -0.53 0.00 0.01
8 0.1806 0.00 0.49 0.00 -0.39
9 0.1806 0.00 0.03 0.00 0.23
10 0.8871 0.00 0.05 0.00 0.01
11 0.8899 0.00 0.13 0.00 -0.20
12 1.2230 0.00 -0.15 0.00 0.23
13 1.2231 0.00 -0.21 0.00 0.41
14 13.1226 0.00 0.02 0.00 -0.11
15 13.1228 0.00 -0.05 0.00 -0.10
16 15.1323 0.00 0.02 0.00 0.03
17 15.1323 0.00 -0.10 0.00 0.13
18 15.1324 0.00 0.03 0.00 -0.06
19 15.1324 0.00 0.03 0.00 0.06
20 23.4571 0.00 ( 2.84) 0.00 ( -1.57)
21 23.4573 0.00 ( 2.94) 0.00 ( -0.91)
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.
01XZ255 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 16.004 16.004 16.004 ecceobj 0.037 0.037 0.037 incobj 2.607 2.607 2.607 qmin 13.323 11.928 12.142 qmax 18.448 18.839 19.513 amean 15.923 15.651 15.869 amin 15.667 14.983 15.672 amax 16.985 16.154 16.070 emean 0.098 0.121 0.142 emin 0.034 0.034 0.034 emax 0.152 0.223 0.230 imean 1.602 1.396 1.583 imin 0.197 0.219 1.180 imax 2.042 2.131 2.042 excite_mean 0.102 0.124 0.145 fracstop 0.010 0.016 0.019 cjmean 3.337 3.354 3.332 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 245.9 253.1 199.2 kozaiamp 176.0 179.8 178.5