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: 20KU11
# Created Sun Dec 22 02:11:11 2024
# Orbit generated from Bernstein formalism
# Fitting 18 observations of 18
# Arc: 161.77d
# First observation: 2020/05/26
# Last observation: 2020/11/04
Preliminary a, adot, b, bdot, g, gdot:
-0.000003 0.019968 -0.000013 -0.004048 0.020877 0.000000
# Chi-squared of fit: 2.54 DOF: 30 RMS: 0.07
# Min/Max residuals: -0.11 0.12
# Exact a, adot, b, bdot, g, gdot:
1.272912E-05 1.566981E-02 -3.600955E-06 -4.303584E-03 2.001493E-02 -1.009531E-03
# Covariance matrix:
2.4665E-13 -1.1527E-11 3.6995E-14 -1.0133E-12 -1.0428E-12 3.0902E-10
-1.1527E-11 1.0528E-08 -3.1614E-11 7.6564E-10 1.6446E-09 -2.0135E-07
3.6995E-14 -3.1614E-11 2.2085E-13 -2.6606E-12 -4.9177E-12 6.0779E-10
-1.0133E-12 7.6564E-10 -2.6606E-12 5.8945E-11 1.1834E-10 -1.4822E-08
-1.0428E-12 1.6446E-09 -4.9177E-12 1.1834E-10 2.6152E-10 -3.0848E-08
3.0902E-10 -2.0135E-07 6.0779E-10 -1.4822E-08 -3.0848E-08 3.9352E-06
# lat0 lon0 xBary yBary zBary JD0
2.226164 -73.367638 0.670732 0.029148 -0.753115 2458995.967801
# Heliocentric elements and errors
Epoch: 2458990.5000 = 2020/05/21
Mean Anomaly: 211.55128 +/- 35.151
Argument of Peri: 328.38566 +/- 34.744
Long of Asc Node: 113.84460 +/- 0.049
Inclination: 15.44166 +/- 0.092
Eccentricity: 0.16110781 +/- 0.0362
Semi-Major Axis: 44.37701685 +/- 0.7819
Time of Perihelion: 2503516.0754 +/- 10477.3
Perihelion: 37.22753292 +/- 1.7348
Aphelion: 51.52650078 +/- 1.8449
Period (y) 295.6279 +/- 7.81
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 13.86867984 +/- 0.0115
Ecliptic Y -48.75717299 +/- 0.0386
Ecliptic Z 1.94064813 +/- 0.0016
Ecliptic XDOT 0.00202897 +/- 0.0001
Ecliptic YDOT 0.00072734 +/- 0.0003
Ecliptic ZDOT -0.00059384 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 50.72837779 +/- 0.0373
Geocenter to KBO 49.96269268 +/- 0.0404
# Hcoef: 9.84
The following table shows the complete astrometric record for 20KU11. 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 (20KU11) followed by the observatory code and reference code for the source of the astrometry.
2020 05 26.467 19 10 58.315 -20 11 40.21 27.1R 20KU11 266 C~4Al3 2020 05 26.552 19 10 58.050 -20 11 40.72 27.1R 20KU11 266 C~4Al3 2020 05 29.44698 19 10 48.987 -20 11 58.35 26.9r 20KU11 266 C~5Zeg 2020 05 29.53371 19 10 48.702 -20 11 58.91 26.9r 20KU11 266 C~5Zeg 2020 05 29.61905 19 10 48.421 -20 11 59.43 26.9r 20KU11 266 C~6VL7 2020 05 31.44139 19 10 42.462 -20 12 11.00 27.0r 20KU11 266 C~5Zeg 2020 05 31.52961 19 10 42.163 -20 12 11.58 27.0r 20KU11 266 C~5Zeg 2020 05 31.61814 19 10 41.863 -20 12 12.15 27.0r 20KU11 266 C~6VL7 2020 06 21.45390 19 09 23.422 -20 14 51.15 26.2r 20KU11 266 C~5Zeg 2020 06 21.53376 19 09 23.088 -20 14 51.84 26.2r 20KU11 266 C~5Zeg 2020 06 21.61261 19 09 22.758 -20 14 52.50 26.2r 20KU11 266 C~6VL7 2020 06 24.43648 19 09 11.071 -20 15 17.25 26.8r 20KU11 266 C~6VL7 2020 06 24.52599 19 09 10.690 -20 15 18.04 26.8r 20KU11 266 C~5Zeg 2020 06 24.61708 19 09 10.304 -20 15 18.83 26.8r 20KU11 266 C~5Zeg 2020 11 04.215113 19 05 16.622 -20 30 40.19 20KU11 250 S~7WXm 2020 11 04.221433 19 05 16.632 -20 30 40.14 20KU11 250 S~7WXm 2020 11 04.227752 19 05 16.645 -20 30 40.06 20KU11 250 S~7WXm 2020 11 04.234072 19 05 16.662 -20 30 40.01 20KU11 250 S~7WXm
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 -0.07 0.00 0.04
2 0.0002 -3.76 -0.06 -0.05 0.04
3 0.0082 -132.55 0.09 -2.09 -0.06
4 0.0084 -136.60 0.09 -2.16 -0.07
5 0.0086 -140.59 0.09 -2.20 -0.06
6 0.0136 -225.26 -0.03 -3.53 0.01
7 0.0139 -229.51 -0.03 -3.60 0.02
8 0.0141 -233.77 -0.02 -3.66 0.01
9 0.0711 -1348.95 -0.09 -29.10 0.07
10 0.0714 -1353.70 -0.08 -29.23 0.06
11 0.0716 -1358.39 -0.09 -29.33 0.07
12 0.0793 -1524.64 0.08 -34.37 -0.04
13 0.0796 -1530.06 0.07 -34.52 -0.04
14 0.0798 -1535.55 0.07 -34.66 -0.04
15 0.4428 -4906.72 0.12 -569.85 -0.11
16 0.4429 -4906.57 0.01 -569.82 -0.04
17 0.4429 -4906.38 -0.06 -569.76 0.05
18 0.4429 -4906.14 -0.07 -569.74 0.10
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.
20KU11 quality flag:1 Type: SCATEXTD CENTAURS SCATEXTD axisobj 43.945 50.300 43.567 ecceobj 0.171 0.380 0.162 incobj 15.507 15.220 15.630 qmin 35.286 29.901 36.336 qmax 53.289 83.756 51.557 amean 44.186 50.869 43.726 amin 43.790 48.065 43.319 amax 44.673 57.677 44.170 emean 0.178 0.387 0.121 emin 0.161 0.342 0.096 emax 0.197 0.463 0.168 imean 13.884 13.480 15.025 imin 12.938 11.073 13.863 imax 14.657 15.614 15.856 excite_mean 0.299 0.452 0.286 fracstop 1.000 1.000 1.000 cjmean 2.996 2.922 3.000 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 180.5 186.3 167.8 kozaiamp 180.0 179.9 180.0