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: 20KE55
# Created Mon Apr 28 01:11:21 2025
# Orbit generated from Bernstein formalism
# Fitting 12 observations of 12
# Arc: 76.97d
# First observation: 2020/05/29
# Last observation: 2020/08/14
Preliminary a, adot, b, bdot, g, gdot:
-0.000003 0.029986 -0.000000 -0.000859 0.024858 0.000000
# Chi-squared of fit: 0.17 DOF: 18 RMS: 0.02
# Min/Max residuals: -0.04 0.04
# Exact a, adot, b, bdot, g, gdot:
1.577443E-05 2.367271E-02 -4.998063E-07 -8.518222E-04 2.374347E-02 -4.976720E-04
# Covariance matrix:
4.1576E-13 1.7492E-10 -1.5797E-14 -5.1507E-13 3.9275E-11 2.1350E-09
1.7492E-10 7.7889E-07 -5.7059E-11 -7.1893E-10 1.3471E-07 -2.0180E-08
-1.5797E-14 -5.7059E-11 2.5443E-13 -1.1600E-12 -1.0072E-11 -4.7750E-11
-5.1507E-13 -7.1893E-10 -1.1600E-12 1.3301E-11 -1.4904E-10 -5.9791E-09
3.9275E-11 1.3471E-07 -1.0072E-11 -1.4904E-10 2.3917E-08 1.4641E-07
2.1350E-09 -2.0180E-08 -4.7750E-11 -5.9791E-09 1.4641E-07 3.6405E-05
# lat0 lon0 xBary yBary zBary JD0
2.210831 -73.565490 0.629501 0.030294 -0.788037 2458998.947781
# Heliocentric elements and errors
Epoch: 2458990.5000 = 2020/05/21
Mean Anomaly: 340.26352 +/- 122.617
Argument of Peri: 156.95911 +/- 152.103
Long of Asc Node: 152.50852 +/- 1.074
Inclination: 2.96969 +/- 0.053
Eccentricity: 0.09642699 +/- 0.1213
Semi-Major Axis: 47.13925063 +/- 2.9331
Time of Perihelion: 2465471.4635 +/- 40259.8
Perihelion: 42.59375481 +/- 6.3031
Aphelion: 51.68474644 +/- 6.5611
Period (y) 323.6549 +/- 30.21
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 11.53179189 +/- 0.0775
Ecliptic Y -41.30737366 +/- 0.2629
Ecliptic Z 1.62477820 +/- 0.0106
Ecliptic XDOT 0.00261113 +/- 0.0002
Ecliptic YDOT 0.00082720 +/- 0.0007
Ecliptic ZDOT -0.00010060 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 42.91760999 +/- 0.2539
Geocenter to KBO 42.11683715 +/- 0.2743
# Hcoef: 10.30
The following table shows the complete astrometric record for 20KE55. 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 (20KE55) followed by the observatory code and reference code for the source of the astrometry.
2020 05 29.44698 19 10 08.594 -20 14 00.86 26.8r 20KE55 266 C~6c5b 2020 05 29.53371 19 10 08.271 -20 14 01.28 26.8r 20KE55 266 C~6c5b 2020 05 29.61905 19 10 07.952 -20 14 01.67 26.8r 20KE55 266 C~6c5b 2020 05 31.44139 19 10 01.210 -20 14 10.40 26.4r 20KE55 266 C~6c5b 2020 05 31.52961 19 10 00.870 -20 14 10.85 26.4r 20KE55 266 C~6c5b 2020 05 31.61814 19 10 00.529 -20 14 11.28 26.4r 20KE55 266 C~6c5b 2020 08 12.26680 19 04 30.230 -20 23 42.05 26.6r 20KE55 266 C~6c5b 2020 08 12.34843 19 04 29.909 -20 23 42.74 26.6r 20KE55 266 C~6c5b 2020 08 12.42950 19 04 29.591 -20 23 43.40 26.6r 20KE55 266 C~6c5b 2020 08 14.24286 19 04 22.755 -20 23 58.33 26.5r 20KE55 266 C~6c5b 2020 08 14.33285 19 04 22.412 -20 23 59.08 26.5r 20KE55 266 C~6c5b 2020 08 14.42134 19 04 22.076 -20 23 59.79 26.5r 20KE55 266 C~6c5b
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 -4.56 -0.00 0.13 -0.02
3 0.0005 -9.07 -0.00 0.28 -0.02
4 0.0055 -104.32 0.01 2.98 0.02
5 0.0057 -109.12 -0.00 3.11 0.02
6 0.0059 -113.94 0.00 3.26 0.02
7 0.2048 -4795.90 0.01 -26.56 -0.04
8 0.2051 -4800.47 -0.00 -26.75 -0.04
9 0.2053 -4804.99 -0.01 -26.90 -0.04
10 0.2103 -4902.22 0.01 -31.04 0.04
11 0.2105 -4907.10 -0.00 -31.25 0.04
12 0.2107 -4911.87 0.00 -31.43 0.04
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.
20KE55 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