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: 05CD81
# Created Fri Nov 22 02:08:45 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 25 observations of 25
# Arc: 16.10y
# First observation: 2005/02/10
# Last observation: 2021/03/20
# Chi-squared of fit: 22.19 DOF: 44 RMS: 0.17
# Min/Max residuals: -0.43 0.52
# Exact a, adot, b, bdot, g, gdot:
1.156397E-05 1.814804E-02 -4.667275E-06 -7.089266E-03 2.261472E-02 1.697574E-04
# Covariance matrix:
1.3819E-13 -3.5198E-14 -1.0974E-14 1.0850E-14 2.4527E-15 -9.2371E-14
-3.5198E-14 3.2006E-14 1.2232E-14 -1.2131E-14 2.9802E-14 1.0283E-13
-1.0974E-14 1.2232E-14 1.1459E-13 -1.2994E-14 1.0735E-14 4.1080E-14
1.0850E-14 -1.2131E-14 -1.2994E-14 6.1394E-15 -1.0851E-14 -4.0726E-14
2.4527E-15 2.9802E-14 1.0735E-14 -1.0851E-14 2.0700E-13 8.9481E-14
-9.2371E-14 1.0283E-13 4.1080E-14 -4.0726E-14 8.9481E-14 3.4536E-13
# lat0 lon0 xBary yBary zBary JD0
0.501316 136.509487 -0.084462 0.008687 -0.979869 2453411.808073
# Heliocentric elements and errors
Epoch: 2453412.5000 = 2005/02/11
Mean Anomaly: 176.21812 +/- 0.019
Argument of Peri: 1.49748 +/- 0.010
Long of Asc Node: 317.87859 +/- 0.000
Inclination: 21.29443 +/- 0.000
Eccentricity: 0.14674579 +/- 0.0000
Semi-Major Axis: 39.42607227 +/- 0.0024
Time of Perihelion: 2409151.4462 +/- 6.2
Perihelion: 33.64046201 +/- 0.0028
Aphelion: 45.21168253 +/- 0.0033
Period (y) 247.5617 +/- 0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -32.85284393 +/- 0.0006
Ecliptic Y 31.04463998 +/- 0.0006
Ecliptic Z 0.38668020 +/- 0.0000
Ecliptic XDOT -0.00153265 +/- 0.0000
Ecliptic YDOT -0.00158184 +/- 0.0000
Ecliptic ZDOT -0.00085798 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 45.20208051 +/- 0.0006
Geocenter to KBO 44.21902391 +/- 0.0009
# Hcoef: 7.00
The following table shows the complete astrometric record for 05CD81. 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 (05CD81) followed by the observatory code and reference code for the source of the astrometry.
2005 02 10.30733 09 16 29.15 +16 21 59.5 23.6g 05CD81 568 C~0Ur8 2005 02 10.39031 09 16 28.74 +16 22 01.0 23.8g 05CD81 568 C~0Ur8 2005 02 10.42988 09 16 28.54 +16 22 01.8 24.1g 05CD81 568 C~0Ur8 2005 02 15.33025 09 16 05.30 +16 23 26.1 05CD81 568 C~0Ur8 2005 04 11.30208 09 12 53.41 +16 33 38.8 23.6i 05CD81 568 C~0Ur8 2005 04 11.32677 09 12 53.37 +16 33 38.8 24.1i 05CD81 568 C~0Ur8 2005 04 11.35652 09 12 53.31 +16 33 38.7 23.9i 05CD81 568 C~0Ur8 2006 02 03.47073 09 20 40.08 +15 37 43.6 05CD81 568 C~0Ur8 2006 02 06.32156 09 20 26.51 +15 38 35.1 23.2r 05CD81 568 C~0Ur8 2006 02 06.36197 09 20 26.30 +15 38 35.9 23.2r 05CD81 568 C~0Ur8 2006 02 06.40101 09 20 26.11 +15 38 36.4 23.2r 05CD81 568 C~0Ur8 2006 11 23.52969 09 28 01.56 +14 42 44.8 05CD81 695 C~0Ur8 2006 11 25.46227 09 28 00.38 +14 42 41.6 05CD81 695 C~0Ur8 2008 05 04.16030 09 23 13.50 +14 29 16.3 05CD81 695 C~0Ur8 2008 05 05.15245 09 23 13.66 +14 29 12.5 05CD81 695 C~0Ur8 2013 03 13.14145 09 42 27.00 +10 49 37.3 23.0R 05CD81 G37 C~0qSY 2013 03 13.19227 09 42 26.80 +10 49 38.2 05CD81 G37 C~0qSY 2019 04 05.157470 10 01 40.977 +06 33 33.90 23.4G 05CD81 G37 C~34bb 2019 04 05.231450 10 01 40.757 +06 33 35.17 05CD81 G37 C~34bb 2021 01 11.435390 10 14 05.548 +04 38 41.12 23.0G 05CD81 G37 C~4TyE 2021 01 11.476360 10 14 05.416 +04 38 41.68 05CD81 G37 C~4TyE 2021 01 11.516160 10 14 05.332 +04 38 42.00 05CD81 G37 C~4TyE 2021 03 20.168040 10 09 19.917 +04 59 42.73 23.1G 05CD81 G37 C~4hk6 2021 03 20.207240 10 09 19.754 +04 59 43.47 05CD81 G37 C~4hk6 2021 03 20.246150 10 09 19.602 +04 59 44.31 05CD81 G37 C~4hk6
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 0.21 0.00 -0.13
2 0.0002 0.00 0.10 0.00 -0.09
3 0.0003 0.00 -0.02 0.00 0.02
4 0.0138 0.00 0.26 0.00 -0.17
5 0.1643 0.00 -0.19 0.00 0.25
6 0.1643 0.00 -0.15 0.00 0.19
7 0.1644 0.00 -0.29 0.00 0.01
8 0.9806 0.00 -0.03 0.00 -0.43
9 0.9884 0.00 0.16 0.00 0.09
10 0.9885 0.00 -0.06 0.00 0.16
11 0.9886 0.00 -0.07 0.00 -0.05
12 1.7829 0.00 0.04 0.00 0.20
13 1.7882 0.00 -0.22 0.00 0.03
14 3.2275 0.00 0.04 0.00 0.00
15 3.2302 0.00 0.24 0.00 -0.14
16 8.0844 0.00 -0.07 0.00 0.07
17 8.0846 0.00 0.01 0.00 0.05
18 14.1461 0.00 -0.04 0.00 -0.01
19 14.1463 0.00 0.03 0.00 -0.04
20 15.9182 0.00 -0.35 0.00 -0.14
21 15.9183 0.00 -0.24 0.00 0.06
22 15.9184 0.00 0.52 0.00 0.03
23 16.1037 0.00 0.11 0.00 0.09
24 16.1038 0.00 -0.00 0.00 -0.03
25 16.1039 0.00 0.03 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.
05CD81 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.286 39.286 39.286 ecceobj 0.152 0.152 0.152 incobj 21.358 21.358 21.358 qmin 32.800 32.802 32.798 qmax 46.664 46.663 46.671 amean 39.456 39.456 39.456 amin 39.034 39.035 39.034 amax 39.920 39.918 39.920 emean 0.148 0.148 0.148 emin 0.118 0.118 0.118 emax 0.170 0.170 0.170 imean 22.858 22.858 22.857 imin 22.319 22.317 22.322 imax 23.438 23.438 23.438 excite_mean 0.416 0.416 0.416 fracstop 1.000 1.000 1.000 cjmean 2.850 2.850 2.850 libcent 0 180.6 180.6 180.5 libamp 0 100.1 100.2 99.9 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 185.8 185.7 185.6 kozaiamp 179.9 180.0 180.0