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: 20KJ54
# Created Mon Apr 28 01:11:21 2025
# Orbit generated from Bernstein formalism
# Fitting 15 observations of 15
# Arc: 76.97d
# First observation: 2020/05/29
# Last observation: 2020/08/14
Preliminary a, adot, b, bdot, g, gdot:
-0.000003 0.016637 0.000005 -0.000253 0.022438 0.000000
# Chi-squared of fit: 0.13 DOF: 24 RMS: 0.02
# Min/Max residuals: -0.03 0.03
# Exact a, adot, b, bdot, g, gdot:
1.489523E-05 2.200124E-02 -1.385575E-07 -2.439104E-04 2.334688E-02 -2.859465E-04
# Covariance matrix:
5.5425E-13 1.1148E-10 -1.0592E-13 1.6401E-13 2.2509E-11 6.8547E-10
1.1148E-10 1.9489E-07 -1.7450E-10 2.7951E-10 3.6276E-08 6.1506E-07
-1.0592E-13 -1.7450E-10 4.2139E-13 -1.7825E-12 -3.2514E-11 -5.5770E-10
1.6401E-13 2.7951E-10 -1.7825E-12 1.4413E-11 5.2043E-11 8.8500E-10
2.2509E-11 3.6276E-08 -3.2514E-11 5.2043E-11 6.7624E-09 1.1666E-07
6.8547E-10 6.1506E-07 -5.5770E-10 8.8500E-10 1.1666E-07 2.4245E-06
# lat0 lon0 xBary yBary zBary JD0
2.413844 -73.125951 0.635532 0.032882 -0.783077 2458998.947781
# Heliocentric elements and errors
Epoch: 2458990.5000 = 2020/05/21
Mean Anomaly: 248.99664 +/- 25.113
Argument of Peri: 218.43547 +/- 24.070
Long of Asc Node: 181.74942 +/- 0.460
Inclination: 2.44549 +/- 0.005
Eccentricity: 0.03013872 +/- 0.0747
Semi-Major Axis: 43.12925543 +/- 1.0253
Time of Perihelion: 2490890.4488 +/- 7126.8
Perihelion: 41.82939485 +/- 3.3706
Aphelion: 44.42911600 +/- 3.3894
Period (y) 283.2475 +/- 10.10
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 12.04681406 +/- 0.0437
Ecliptic Y -41.89311622 +/- 0.1442
Ecliptic Z 1.80403440 +/- 0.0064
Ecliptic XDOT 0.00246771 +/- 0.0001
Ecliptic YDOT 0.00078336 +/- 0.0002
Ecliptic ZDOT -0.00003022 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 43.62812689 +/- 0.1390
Geocenter to KBO 42.83227862 +/- 0.1509
# Hcoef: 9.24
The following table shows the complete astrometric record for 20KJ54. 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 (20KJ54) followed by the observatory code and reference code for the source of the astrometry.
2020 05 29.44698 19 11 53.709 -19 58 43.48 25.5r 20KJ54 266 C~6c5Z 2020 05 29.53371 19 11 53.390 -19 58 43.86 25.5r 20KJ54 266 C~6c5Z 2020 05 29.61905 19 11 53.074 -19 58 44.22 25.5r 20KJ54 266 C~6c5Z 2020 06 21.45390 19 10 17.245 -20 00 56.04 25.7r 20KJ54 266 C~6c5Z 2020 06 21.53376 19 10 16.866 -20 00 56.60 25.7r 20KJ54 266 C~6c5Z 2020 06 21.61261 19 10 16.493 -20 00 57.15 25.7r 20KJ54 266 C~6c5Z 2020 06 24.43648 19 10 03.243 -20 01 17.65 25.5r 20KJ54 266 C~6c5Z 2020 06 24.51899 19 10 02.846 -20 01 18.25 25.5r 20KJ54 266 C~6c5Z 2020 06 24.61428 19 10 02.388 -20 01 18.93 25.5r 20KJ54 266 C~6c5Z 2020 08 12.26680 19 06 17.723 -20 08 07.71 25.6r 20KJ54 266 C~6c5Z 2020 08 12.34843 19 06 17.402 -20 08 08.39 25.6r 20KJ54 266 C~6c5Z 2020 08 12.42950 19 06 17.084 -20 08 09.05 25.6r 20KJ54 266 C~6c5Z 2020 08 14.24286 19 06 10.233 -20 08 23.97 25.5r 20KJ54 266 C~6c5Z 2020 08 14.33285 19 06 09.890 -20 08 24.71 25.5r 20KJ54 266 C~6c5Z 2020 08 14.42134 19 06 09.553 -20 08 25.43 25.5r 20KJ54 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 -0.01
2 0.0002 -4.51 0.01 0.18 -0.01
3 0.0005 -8.97 -0.00 0.37 -0.01
4 0.0630 -1365.77 -0.02 33.86 0.03
5 0.0632 -1371.14 -0.03 33.94 0.03
6 0.0634 -1376.42 -0.03 34.03 0.02
7 0.0712 -1564.29 0.02 36.14 -0.02
8 0.0714 -1569.91 0.03 36.22 -0.01
9 0.0716 -1576.40 0.03 36.32 -0.01
10 0.2048 -4768.47 -0.00 1.71 -0.02
11 0.2051 -4773.04 -0.01 1.55 -0.01
12 0.2053 -4777.57 -0.01 1.41 -0.01
13 0.2103 -4875.18 0.00 -2.37 0.01
14 0.2105 -4880.06 0.01 -2.55 0.02
15 0.2107 -4884.86 0.00 -2.73 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.
20KJ54 quality flag:1 Type: CLASSICAL CLASSICAL REMOVED axisobj 42.620 48.642 39.948 ecceobj 0.038 0.174 0.195 incobj 2.447 2.435 2.460 qmin 39.922 39.597 30.836 qmax 45.966 58.750 62.604 amean 42.829 48.964 42.524 amin 42.490 48.520 34.117 amax 43.171 49.465 47.355 emean 0.047 0.176 0.230 emin 0.026 0.165 0.082 emax 0.065 0.188 0.323 imean 3.664 2.805 1.698 imin 2.519 2.475 0.207 imax 4.506 3.127 2.717 excite_mean 0.079 0.183 0.232 fracstop 1.000 1.000 0.425 cjmean 3.080 3.122 3.019 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 184.3 170.7 183.1 kozaiamp 180.0 180.0 179.9