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: 20KK54
# Created Mon Apr 28 01:11:21 2025
# Orbit generated from Bernstein formalism
# Fitting 23 observations of 23
# Arc: 154.82d
# First observation: 2020/05/29
# Last observation: 2020/10/31
Preliminary a, adot, b, bdot, g, gdot:
-0.000015 0.020672 -0.000013 -0.001509 0.021160 0.000000
# Chi-squared of fit: 2.29 DOF: 40 RMS: 0.06
# Min/Max residuals: -0.12 0.16
# Exact a, adot, b, bdot, g, gdot:
1.307417E-05 1.697532E-02 -1.150750E-06 -1.668024E-03 2.051468E-02 -9.872086E-04
# Covariance matrix:
2.6010E-13 -4.6589E-12 1.6798E-14 -2.8047E-13 8.1249E-14 1.8285E-10
-4.6589E-12 3.3579E-10 -1.2317E-12 1.9087E-11 1.7546E-11 -1.0888E-08
1.6798E-14 -1.2317E-12 1.3878E-13 -5.0479E-13 -5.9945E-14 4.0986E-11
-2.8047E-13 1.9087E-11 -5.0479E-13 3.8055E-12 8.4420E-13 -6.4761E-10
8.1249E-14 1.7546E-11 -5.9945E-14 8.4420E-13 2.2010E-12 -3.8552E-10
1.8285E-10 -1.0888E-08 4.0986E-11 -6.4761E-10 -3.8552E-10 3.8356E-07
# lat0 lon0 xBary yBary zBary JD0
2.195766 -74.259734 0.619899 0.030377 -0.795609 2458998.947781
# Heliocentric elements and errors
Epoch: 2458990.5000 = 2020/05/21
Mean Anomaly: 213.65106 +/- 11.855
Argument of Peri: 312.89162 +/- 11.742
Long of Asc Node: 126.14081 +/- 0.028
Inclination: 5.97735 +/- 0.007
Eccentricity: 0.14108591 +/- 0.0130
Semi-Major Axis: 44.14222186 +/- 0.2105
Time of Perihelion: 2502538.3571 +/- 3513.9
Perihelion: 37.91437628 +/- 0.6015
Aphelion: 50.37006744 +/- 0.6219
Period (y) 293.2848 +/- 2.10
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 12.83881753 +/- 0.0010
Ecliptic Y -47.82459427 +/- 0.0034
Ecliptic Z 1.86765131 +/- 0.0001
Ecliptic XDOT 0.00215526 +/- 0.0000
Ecliptic YDOT 0.00073663 +/- 0.0001
Ecliptic ZDOT -0.00022773 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 49.55315504 +/- 0.0033
Geocenter to KBO 48.74557924 +/- 0.0035
# Hcoef: 9.16
The following table shows the complete astrometric record for 20KK54. 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 (20KK54) followed by the observatory code and reference code for the source of the astrometry.
2020 05 29.44698 19 07 12.776 -20 19 48.19 26.1r 20KK54 266 C~6c5Z 2020 05 29.53371 19 07 12.482 -20 19 48.60 26.1r 20KK54 266 C~6c5Z 2020 05 29.61905 19 07 12.192 -20 19 48.99 26.1r 20KK54 266 C~6c5Z 2020 05 31.44139 19 07 06.046 -20 19 57.68 26.2r 20KK54 266 C~6c5Z 2020 05 31.52961 19 07 05.738 -20 19 58.12 26.2r 20KK54 266 C~6c5Z 2020 05 31.61814 19 07 05.427 -20 19 58.55 26.2r 20KK54 266 C~6c5Z 2020 06 21.45390 19 05 44.769 -20 22 03.30 25.9r 20KK54 266 C~6c5Z 2020 06 21.53376 19 05 44.426 -20 22 03.85 25.9r 20KK54 266 C~6c5Z 2020 06 21.61261 19 05 44.088 -20 22 04.38 25.9r 20KK54 266 C~6c5Z 2020 06 24.43648 19 05 32.102 -20 22 24.47 26.0r 20KK54 266 C~6c5Z 2020 06 24.52739 19 05 31.707 -20 22 25.12 26.0r 20KK54 266 C~6c5Z 2020 06 24.61708 19 05 31.317 -20 22 25.74 26.0r 20KK54 266 C~6c5Z 2020 08 12.26680 19 02 09.967 -20 28 49.92 26.0r 20KK54 266 C~6c5Z 2020 08 12.34843 19 02 09.681 -20 28 50.56 26.0r 20KK54 266 C~6c5Z 2020 08 12.42950 19 02 09.398 -20 28 51.17 26.0r 20KK54 266 C~6c5Z 2020 08 14.24286 19 02 03.293 -20 29 05.08 26.0r 20KK54 266 C~6c5Z 2020 08 14.33285 19 02 02.987 -20 29 05.78 26.0r 20KK54 266 C~6c5Z 2020 08 14.42134 19 02 02.687 -20 29 06.44 26.0r 20KK54 266 C~6c5Z 2020 10 31.236861 19 01 29.437 -20 34 16.92 20KK54 250 S~7Bjx 2020 10 31.243180 19 01 29.448 -20 34 16.92 20KK54 250 S~7Bjx 2020 10 31.249500 19 01 29.458 -20 34 16.88 20KK54 250 S~7Bjx 2020 10 31.255819 19 01 29.471 -20 34 16.79 20KK54 250 S~7Bjx 2020 10 31.262139 19 01 29.486 -20 34 16.71 20KK54 250 S~7Bjx
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 -0.03
2 0.0002 -4.15 0.01 0.07 -0.02
3 0.0005 -8.25 0.01 0.15 -0.02
4 0.0055 -95.12 -0.02 1.46 0.01
5 0.0057 -99.48 -0.01 1.52 0.01
6 0.0059 -103.87 -0.02 1.59 0.00
7 0.0630 -1245.07 0.01 6.83 0.11
8 0.0632 -1249.92 0.00 6.83 0.11
9 0.0634 -1254.71 -0.00 6.84 0.11
10 0.0712 -1424.45 0.00 5.88 -0.06
11 0.0714 -1430.04 0.01 5.85 -0.07
12 0.0716 -1435.56 0.00 5.86 -0.06
13 0.2048 -4291.56 0.01 -64.70 -0.00
14 0.2051 -4295.63 0.00 -64.90 -0.01
15 0.2053 -4299.65 0.01 -65.08 -0.01
16 0.2103 -4386.47 -0.00 -69.70 -0.02
17 0.2105 -4390.82 -0.01 -69.94 -0.03
18 0.2107 -4395.09 -0.01 -70.14 -0.03
19 0.4238 -4892.92 0.16 -329.02 -0.08
20 0.4238 -4892.77 0.07 -329.03 -0.07
21 0.4238 -4892.62 -0.03 -329.01 -0.03
22 0.4238 -4892.43 -0.09 -328.94 0.07
23 0.4239 -4892.21 -0.12 -328.88 0.14
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.
20KK54 quality flag:2 Type: SCATNEAR SCATNEAR 7:4EEE axisobj 43.691 44.529 43.458 ecceobj 0.152 0.203 0.136 incobj 5.991 5.975 6.007 qmin 34.444 32.198 37.152 qmax 53.757 61.918 50.827 amean 43.892 44.942 43.726 amin 43.455 44.279 43.286 amax 44.379 47.521 44.230 emean 0.181 0.228 0.137 emin 0.141 0.192 0.123 emax 0.213 0.310 0.149 imean 6.426 6.287 4.920 imin 3.765 3.314 3.915 imax 8.798 8.800 5.893 excite_mean 0.214 0.254 0.162 fracstop 1.000 1.000 1.000 cjmean 3.043 3.032 3.067 libcent 0 -180.0 -180.0 177.8 libamp 0 -180.0 -180.0 151.6 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 177.1 179.3 176.3 kozaiamp 180.0 180.0 180.0