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: 20KU53
# Created Tue Apr 1 01:11:19 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:
0.000000 0.013762 0.000002 -0.000399 0.020452 0.000000
# Chi-squared of fit: 0.09 DOF: 24 RMS: 0.01
# Min/Max residuals: -0.02 0.02
# Exact a, adot, b, bdot, g, gdot:
1.369665E-05 1.851283E-02 -2.942812E-07 -3.966548E-04 2.126421E-02 -1.932989E-04
# Covariance matrix:
3.2037E-13 1.0127E-10 -5.0045E-14 4.1504E-15 1.9808E-11 5.4584E-10
1.0127E-10 2.2081E-07 -1.0458E-10 3.8700E-11 4.0706E-08 6.5865E-07
-5.0045E-14 -1.0458E-10 2.5156E-13 -1.1021E-12 -1.9300E-11 -3.1727E-10
4.1504E-15 3.8700E-11 -1.1021E-12 1.1279E-11 6.9521E-12 6.8685E-11
1.9808E-11 4.0706E-08 -1.9300E-11 6.9521E-12 7.5168E-09 1.2461E-07
5.4584E-10 6.5865E-07 -3.1727E-10 6.8685E-11 1.2461E-07 2.7803E-06
# lat0 lon0 xBary yBary zBary JD0
2.723937 -74.122456 0.621805 0.037639 -0.793809 2458998.947781
# Heliocentric elements and errors
Epoch: 2458990.5000 = 2020/05/21
Mean Anomaly: 199.05517 +/- 51.431
Argument of Peri: 277.58960 +/- 51.159
Long of Asc Node: 171.10905 +/- 0.668
Inclination: 2.93171 +/- 0.015
Eccentricity: 0.07798586 +/- 0.0570
Semi-Major Axis: 44.52574794 +/- 1.2348
Time of Perihelion: 2507507.0374 +/- 15371.7
Perihelion: 41.05336940 +/- 2.7801
Aphelion: 47.99812648 +/- 2.8643
Period (y) 297.1153 +/- 12.36
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 12.47630083 +/- 0.0524
Ecliptic Y -46.12346288 +/- 0.1842
Ecliptic Z 2.23497475 +/- 0.0091
Ecliptic XDOT 0.00229464 +/- 0.0001
Ecliptic YDOT 0.00067724 +/- 0.0002
Ecliptic ZDOT -0.00005243 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 47.83332544 +/- 0.1782
Geocenter to KBO 47.02737789 +/- 0.1917
# Hcoef: 8.65
The following table shows the complete astrometric record for 20KU53. 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 (20KU53) followed by the observatory code and reference code for the source of the astrometry.
2020 05 29.44698 19 07 32.016 -19 47 22.51 25.4r 20KU53 266 C~6c5Y 2020 05 29.53371 19 07 31.715 -19 47 22.83 25.4r 20KU53 266 C~6c5Y 2020 05 29.61905 19 07 31.418 -19 47 23.13 25.4r 20KU53 266 C~6c5Y 2020 05 31.44139 19 07 25.132 -19 47 29.97 25.3r 20KU53 266 C~6c5Y 2020 05 31.52961 19 07 24.817 -19 47 30.32 25.3r 20KU53 266 C~6c5Y 2020 05 31.61814 19 07 24.499 -19 47 30.66 25.3r 20KU53 266 C~6c5Y 2020 06 21.45390 19 06 01.879 -19 49 17.40 25.2r 20KU53 266 C~6c5Y 2020 06 21.53376 19 06 01.527 -19 49 17.89 25.2r 20KU53 266 C~6c5Y 2020 06 21.61261 19 06 01.181 -19 49 18.36 25.2r 20KU53 266 C~6c5Y 2020 08 12.26680 19 02 21.582 -19 55 44.22 25.6r 20KU53 266 C~6c5Y 2020 08 12.34843 19 02 21.289 -19 55 44.84 25.6r 20KU53 266 C~6c5Y 2020 08 12.42950 19 02 20.999 -19 55 45.45 25.6r 20KU53 266 C~6c5Y 2020 08 14.24286 19 02 14.750 -19 55 59.16 25.4r 20KU53 266 C~6c5Y 2020 08 14.33285 19 02 14.437 -19 55 59.84 25.4r 20KU53 266 C~6c5Y 2020 08 14.42134 19 02 14.129 -19 56 00.50 25.4r 20KU53 266 C~6c5Y
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 0.01 0.00 -0.00
2 0.0002 -4.26 0.02 0.17 0.00
3 0.0005 -8.46 0.02 0.36 0.01
4 0.0055 -97.37 -0.02 3.82 0.00
5 0.0057 -101.83 -0.01 3.98 0.00
6 0.0059 -106.33 -0.02 4.17 0.00
7 0.0630 -1276.88 0.01 31.59 -0.01
8 0.0632 -1281.87 0.00 31.66 -0.01
9 0.0634 -1286.78 0.00 31.75 -0.00
10 0.2048 -4408.88 -0.02 -8.71 -0.01
11 0.2051 -4413.06 -0.02 -8.88 -0.01
12 0.2053 -4417.19 -0.02 -9.04 -0.01
13 0.2103 -4506.32 0.02 -13.16 0.01
14 0.2105 -4510.78 0.02 -13.36 0.02
15 0.2107 -4515.17 0.01 -13.55 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.
20KU53 quality flag:1 Type: CLASSICAL CLASSICAL SCATNEAR axisobj 44.032 51.244 41.145 ecceobj 0.089 0.192 0.222 incobj 2.932 2.892 2.974 qmin 39.238 40.858 31.277 qmax 49.467 62.866 63.012 amean 44.243 51.585 40.339 amin 43.886 51.104 35.786 amax 44.621 52.129 47.654 emean 0.093 0.194 0.179 emin 0.077 0.184 0.080 emax 0.109 0.206 0.326 imean 3.250 2.813 1.491 imin 2.487 2.579 0.040 imax 3.994 3.042 2.987 excite_mean 0.109 0.201 0.181 fracstop 1.000 1.000 1.000 cjmean 3.090 3.148 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 187.7 172.1 177.3 kozaiamp 180.0 180.0 180.0