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: 20KO54
# Created Fri Jan 24 02:11:45 2025
# Orbit generated from Bernstein formalism
# Fitting 15 observations of 15
# Arc: 28.17d
# First observation: 2020/05/28
# Last observation: 2020/06/25
Preliminary a, adot, b, bdot, g, gdot:
0.000000 0.051840 -0.000000 -0.005042 0.036610 0.000000
# WARNING Fitting with energy constraint
# Chi-squared of fit: 0.67 DOF: 25 RMS: 0.04
# Min/Max residuals: -0.07 0.06
# Exact a, adot, b, bdot, g, gdot:
2.019521E-05 4.479581E-02 -2.450531E-06 -4.892251E-03 3.509539E-02 -4.601940E-03
# Covariance matrix:
7.1308E-13 1.1333E-09 -4.6677E-14 -2.2943E-11 2.3663E-10 1.4108E-08
1.1333E-09 3.7791E-06 -1.5648E-10 -7.4402E-08 7.7422E-07 4.0958E-05
-4.6677E-14 -1.5648E-10 2.8742E-13 -1.1248E-12 -3.2041E-11 -1.6875E-09
-2.2943E-11 -7.4402E-08 -1.1248E-12 1.5642E-09 -1.5265E-08 -8.1723E-07
2.3663E-10 7.7422E-07 -3.2041E-11 -1.5265E-08 1.5876E-07 8.4621E-06
1.4108E-08 4.0958E-05 -1.6875E-09 -8.1723E-07 8.4621E-06 4.7918E-04
# lat0 lon0 xBary yBary zBary JD0
1.796371 -72.049852 0.662998 0.023716 -0.760248 2458997.947541
# Heliocentric elements and errors
Epoch: 2458990.5000 = 2020/05/21
Mean Anomaly: 340.38730 +/- 58.668
Argument of Peri: 198.66402 +/- 114.569
Long of Asc Node: 122.34421 +/- 0.731
Inclination: 6.44262 +/- 0.298
Eccentricity: 0.26952730 +/- 0.2615
Semi-Major Axis: 38.57799386 +/- 3.6016
Time of Perihelion: 2463758.5706 +/- 14247.2
Perihelion: 28.18017137 +/- 10.4266
Aphelion: 48.97581635 +/- 11.0770
Period (y) 239.6170 +/- 33.56
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 8.38641832 +/- 0.0996
Ecliptic Y -28.02830078 +/- 0.3076
Ecliptic Z 0.89320805 +/- 0.0101
Ecliptic XDOT 0.00322572 +/- 0.0006
Ecliptic YDOT 0.00141051 +/- 0.0016
Ecliptic ZDOT -0.00039295 +/- 0.0001
# Distances at JD0 (AU)
Heliocenter to KBO 29.26970239 +/- 0.2959
Geocenter to KBO 28.49377182 +/- 0.3235
# Hcoef: 11.57
The following table shows the complete astrometric record for 20KO54. 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 (20KO54) followed by the observatory code and reference code for the source of the astrometry.
2020 05 28.44674 19 16 46.554 -20 27 17.35 25.0r 20KO54 266 C~6c5Z 2020 05 28.50129 19 16 46.290 -20 27 17.86 25.0r 20KO54 266 C~6c5Z 2020 05 28.55756 19 16 46.016 -20 27 18.37 25.0r 20KO54 266 C~6c5Z 2020 06 01.43269 19 16 26.938 -20 27 55.10 26.5r 20KO54 266 C~6c5Z 2020 06 01.47325 19 16 26.726 -20 27 55.52 26.5r 20KO54 266 C~6c5Z 2020 06 01.60571 19 16 26.032 -20 27 56.83 26.5r 20KO54 266 C~6c5Z 2020 06 20.45583 19 14 35.690 -20 31 36.83 26.5r 20KO54 266 C~6c5Z 2020 06 20.52860 19 14 35.210 -20 31 37.79 26.5r 20KO54 266 C~6c5Z 2020 06 20.62233 19 14 34.594 -20 31 38.99 26.5r 20KO54 266 C~6c5Z 2020 06 22.44948 19 14 22.725 -20 32 03.50 26.3r 20KO54 266 C~6c5Z 2020 06 22.52092 19 14 22.248 -20 32 04.46 26.3r 20KO54 266 C~6c5Z 2020 06 22.59118 19 14 21.779 -20 32 05.38 26.3r 20KO54 266 C~6c5Z 2020 06 25.44823 19 14 02.908 -20 32 44.41 26.5r 20KO54 266 C~6c5Z 2020 06 25.53213 19 14 02.338 -20 32 45.56 26.5r 20KO54 266 C~6c5Z 2020 06 25.61487 19 14 01.777 -20 32 46.67 26.5r 20KO54 266 C~6c5Z
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 -0.00 0.00 0.05
2 0.0001 -3.75 0.00 -0.02 0.05
3 0.0003 -7.63 0.00 -0.02 0.05
4 0.0109 -278.25 -0.00 -1.42 -0.06
5 0.0110 -281.26 -0.01 -1.45 -0.07
6 0.0114 -291.10 0.00 -1.48 -0.07
7 0.0630 -1856.92 0.02 -19.76 0.05
8 0.0632 -1863.73 0.01 -19.85 0.05
9 0.0635 -1872.47 0.01 -19.94 0.06
10 0.0685 -2040.98 -0.01 -23.01 -0.03
11 0.0686 -2047.74 -0.01 -23.11 -0.03
12 0.0688 -2054.40 -0.01 -23.19 -0.02
13 0.0767 -2322.31 0.00 -28.25 -0.01
14 0.0769 -2330.39 0.00 -28.38 -0.01
15 0.0771 -2338.35 -0.00 -28.48 -0.01
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.
20KO54 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0