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: 13CG269
# Created Mon Jul 7 01:09:26 2025
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 21 observations of 21
# Arc: 9.26y
# First observation: 2013/02/04
# Last observation: 2022/05/10
# Chi-squared of fit: 7.58 DOF: 36 RMS: 0.11
# Min/Max residuals: -0.31 0.21
# Exact a, adot, b, bdot, g, gdot:
1.598101E-05 2.517881E-02 -3.378111E-08 5.640436E-04 2.478314E-02 -1.843659E-04
# Covariance matrix:
3.9709E-13 -1.1552E-13 2.3732E-15 -1.7890E-15 5.0783E-14 -3.7612E-13
-1.1552E-13 7.6717E-14 -2.0051E-15 1.4674E-15 5.0370E-14 3.3938E-13
2.3732E-15 -2.0051E-15 2.8410E-13 -5.9761E-14 -8.6255E-16 -1.1825E-14
-1.7890E-15 1.4674E-15 -5.9761E-14 1.6599E-14 5.4830E-16 8.7063E-15
5.0783E-14 5.0370E-14 -8.6255E-16 5.4830E-16 1.9733E-13 1.8670E-13
-3.7612E-13 3.3938E-13 -1.1825E-14 8.7063E-15 1.8670E-13 1.9759E-12
# lat0 lon0 xBary yBary zBary JD0
1.634196 -164.075635 0.855484 0.014004 -0.487844 2456327.828402
# Heliocentric elements and errors
Epoch: 2456328.5000 = 2013/02/05
Mean Anomaly: 339.99317 +/- 0.041
Argument of Peri: 73.84241 +/- 0.048
Long of Asc Node: 143.96319 +/- 0.007
Inclination: 2.08401 +/- 0.000
Eccentricity: 0.07146141 +/- 0.0001
Semi-Major Axis: 43.75408644 +/- 0.0032
Time of Perihelion: 2462203.4217 +/- 16.3
Perihelion: 40.62735752 +/- 0.0037
Aphelion: 46.88081537 +/- 0.0041
Period (y) 289.4251 +/- 0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -39.48856823 +/- 0.0007
Ecliptic Y -10.37563013 +/- 0.0002
Ecliptic Z 1.15067020 +/- 0.0000
Ecliptic XDOT 0.00077826 +/- 0.0000
Ecliptic YDOT -0.00266775 +/- 0.0000
Ecliptic ZDOT 0.00006184 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 40.84514841 +/- 0.0007
Geocenter to KBO 40.35003793 +/- 0.0007
# Hcoef: 6.86
The following table shows the complete astrometric record for 13CG269. 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 (13CG269) followed by the observatory code and reference code for the source of the astrometry.
2013 02 04.327624 13 01 12.075 -04 45 24.80 22.6z 13CG269 W84 C~8vD4 2013 02 06.392143 13 01 08.32 -04 44 55.8 22.7z 13CG269 W84 C~8vD4 2013 02 08.393616 13 01 04.326 -04 44 25.60 22.6z 13CG269 W84 C~8vD4 2013 06 16.088846 12 53 40.06 -03 57 58.9 22.7i 13CG269 W84 C~8vD4 2016 07 22.048426 13 10 00.79 -05 34 36.4 22.7z 13CG269 W84 C~8vD4 2016 08 12.002386 13 10 58.15 -05 41 14.0 22.6z 13CG269 W84 C~8vD4 2017 02 24.561983 13 22 12.84 -06 44 53.8 23.3r 13CG269 T09 C~8vD4 2017 02 24.622738 13 22 12.66 -06 44 52.6 23.3r 13CG269 T09 C~8vD4 2017 03 23.248598 13 20 34.301 -06 34 12.04 23.0w 13CG269 W84 C~8vD4 2017 03 23.271319 13 20 34.20 -06 34 11.4 23.0w 13CG269 W84 C~8vD4 2017 03 24.266573 13 20 29.88 -06 33 44.1 23.1w 13CG269 W84 C~8vD4 2017 03 24.319946 13 20 29.66 -06 33 42.9 23.1w 13CG269 W84 C~8vD4 2017 03 25.226454 13 20 25.70 -06 33 18.0 23.0w 13CG269 W84 C~8vD4 2017 03 25.237477 13 20 25.653 -06 33 17.66 23.1w 13CG269 W84 C~8vD4 2017 03 26.230919 13 20 21.287 -06 32 50.25 23.2w 13CG269 W84 C~8vD4 2017 03 26.276502 13 20 21.09 -06 32 49.1 23.2w 13CG269 W84 C~8vD4 2017 03 26.324599 13 20 20.861 -06 32 47.66 23.2w 13CG269 W84 C~8vD4 2017 05 21.110962 13 16 21.09 -06 08 56.9 23.1r 13CG269 W84 C~8vD4 2017 07 18.081017 13 15 15.84 -06 04 31.1 24.0g 13CG269 W84 C~8vD4 2017 07 19.067649 13 15 17.23 -06 04 41.9 23.0r 13CG269 W84 C~8vD4 2022 05 10.156415 13 44 48.34 -08 47 01.5 22.8i 13CG269 W84 C~8vD4
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 0.05 0.00 0.07
2 0.0057 0.00 0.12 0.00 0.10
3 0.0111 0.00 -0.04 0.00 0.18
4 0.3607 0.00 -0.05 0.00 -0.09
5 3.4599 0.00 0.15 0.00 0.05
6 3.5172 0.00 -0.02 0.00 -0.12
7 4.0554 0.00 -0.06 0.00 -0.08
8 4.0556 0.00 -0.05 0.00 -0.09
9 4.1285 0.00 -0.04 0.00 0.05
10 4.1285 0.00 -0.05 0.00 0.07
11 4.1312 0.00 -0.13 0.00 0.20
12 4.1314 0.00 0.11 0.00 -0.06
13 4.1339 0.00 -0.01 0.00 -0.03
14 4.1339 0.00 0.02 0.00 0.00
15 4.1366 0.00 0.03 0.00 0.02
16 4.1368 0.00 0.14 0.00 -0.09
17 4.1369 0.00 -0.06 0.00 0.02
18 4.2896 0.00 -0.00 0.00 -0.31
19 4.4483 0.00 -0.13 0.00 -0.08
20 4.4510 0.00 -0.18 0.00 0.02
21 9.2589 0.00 0.10 0.00 0.21
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.
13CG269 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.579 43.579 43.579 ecceobj 0.068 0.068 0.068 incobj 2.087 2.087 2.087 qmin 40.097 40.095 40.100 qmax 47.843 47.820 47.849 amean 43.848 43.848 43.848 amin 43.496 43.504 43.501 amax 44.230 44.214 44.227 emean 0.065 0.065 0.065 emin 0.048 0.048 0.048 emax 0.082 0.082 0.082 imean 1.939 1.939 1.939 imin 1.179 1.179 1.180 imax 2.626 2.626 2.626 excite_mean 0.074 0.074 0.074 fracstop 1.000 1.000 1.000 cjmean 3.093 3.093 3.093 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 166.3 166.2 166.3 kozaiamp 180.0 180.0 180.0