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: 20KF54
# Created Tue Apr 1 01:11:19 2025
# Orbit generated from Bernstein formalism
# Fitting 21 observations of 21
# Arc: 79.98d
# First observation: 2020/05/26
# Last observation: 2020/08/14
Preliminary a, adot, b, bdot, g, gdot:
0.000005 0.020592 0.000004 0.000277 0.024462 0.000000
# Chi-squared of fit: 0.17 DOF: 36 RMS: 0.02
# Min/Max residuals: -0.03 0.03
# Exact a, adot, b, bdot, g, gdot:
1.625809E-05 2.608812E-02 3.728964E-08 2.687352E-04 2.536723E-02 -1.884003E-03
# Covariance matrix:
2.1199E-13 -1.5284E-11 9.1106E-15 3.2510E-14 -2.0613E-12 9.5782E-11
-1.5284E-11 8.3545E-08 -6.6306E-11 -9.2388E-11 1.5678E-08 2.5701E-07
9.1106E-15 -6.6306E-11 1.9081E-13 -7.2412E-13 -1.2467E-11 -2.0869E-10
3.2510E-14 -9.2388E-11 -7.2412E-13 9.3734E-12 -1.7188E-11 -2.5182E-10
-2.0613E-12 1.5678E-08 -1.2467E-11 -1.7188E-11 2.9487E-09 4.9530E-08
9.5782E-11 2.5701E-07 -2.0869E-10 -2.5182E-10 4.9530E-08 1.0667E-06
# lat0 lon0 xBary yBary zBary JD0
2.891042 -73.283508 0.672146 0.037822 -0.751467 2458995.943811
# Heliocentric elements and errors
Epoch: 2458990.5000 = 2020/05/21
Mean Anomaly: 320.29039 +/- 13.064
Argument of Peri: 127.58668 +/- 18.044
Long of Asc Node: 208.26755 +/- 0.169
Inclination: 2.90485 +/- 0.002
Eccentricity: 0.12556377 +/- 0.0228
Semi-Major Axis: 44.12004461 +/- 0.5034
Time of Perihelion: 2470797.6612 +/- 3879.0
Perihelion: 38.58016555 +/- 1.0998
Aphelion: 49.65992368 +/- 1.1562
Period (y) 293.0638 +/- 5.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 10.90275843 +/- 0.0242
Ecliptic Y -38.62776532 +/- 0.0807
Ecliptic Z 1.98833847 +/- 0.0043
Ecliptic XDOT 0.00264595 +/- 0.0001
Ecliptic YDOT 0.00100929 +/- 0.0001
Ecliptic ZDOT 0.00001848 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 40.18616534 +/- 0.0779
Geocenter to KBO 39.42094472 +/- 0.0844
# Hcoef: 9.12
The following table shows the complete astrometric record for 20KF54. 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 (20KF54) followed by the observatory code and reference code for the source of the astrometry.
2020 05 26.44301 19 10 59.014 -19 31 27.62 25.2r 20KF54 266 C~6c5Z 2020 05 26.50149 19 10 58.796 -19 31 27.82 25.2r 20KF54 266 C~6c5Z 2020 05 26.55599 19 10 58.593 -19 31 27.99 25.2r 20KF54 266 C~6c5Z 2020 05 29.44698 19 10 47.790 -19 31 37.78 25.1r 20KF54 266 C~6c5Z 2020 05 29.53371 19 10 47.449 -19 31 38.11 25.1r 20KF54 266 C~6c5Z 2020 05 29.61905 19 10 47.113 -19 31 38.41 25.1r 20KF54 266 C~6c5Z 2020 05 31.44139 19 10 40.001 -19 31 45.35 25.1r 20KF54 266 C~6c5Z 2020 05 31.52961 19 10 39.643 -19 31 45.71 25.1r 20KF54 266 C~6c5Z 2020 05 31.61814 19 10 39.283 -19 31 46.05 25.1r 20KF54 266 C~6c5Z 2020 06 21.45390 19 09 04.767 -19 33 41.72 25.3r 20KF54 266 C~6c5Z 2020 06 21.53376 19 09 04.362 -19 33 42.27 25.3r 20KF54 266 C~6c5Z 2020 06 21.61261 19 09 03.963 -19 33 42.80 25.3r 20KF54 266 C~6c5Z 2020 06 24.43648 19 08 49.793 -19 34 02.93 24.9r 20KF54 266 C~6c5Z 2020 06 24.52599 19 08 49.332 -19 34 03.58 24.9r 20KF54 266 C~6c5Z 2020 06 24.61708 19 08 48.864 -19 34 04.22 24.9r 20KF54 266 C~6c5Z 2020 08 12.26680 19 04 49.471 -19 41 06.78 25.2r 20KF54 266 C~6c5Z 2020 08 12.34843 19 04 49.131 -19 41 07.51 25.2r 20KF54 266 C~6c5Z 2020 08 12.42950 19 04 48.794 -19 41 08.21 25.2r 20KF54 266 C~6c5Z 2020 08 14.24286 19 04 41.551 -19 41 24.14 24.9r 20KF54 266 C~6c5Z 2020 08 14.33285 19 04 41.188 -19 41 24.94 24.9r 20KF54 266 C~6c5Z 2020 08 14.42134 19 04 40.832 -19 41 25.70 24.9r 20KF54 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 0.03
2 0.0002 -3.08 -0.01 0.18 0.02
3 0.0003 -5.95 -0.01 0.36 0.03
4 0.0082 -158.74 0.01 9.16 -0.01
5 0.0085 -163.56 0.00 9.41 -0.01
6 0.0087 -168.32 0.00 9.69 -0.01
7 0.0137 -268.96 -0.00 14.97 -0.01
8 0.0139 -274.03 -0.00 15.22 -0.01
9 0.0142 -279.12 0.00 15.50 -0.01
10 0.0712 -1619.43 0.03 60.69 -0.01
11 0.0714 -1625.18 0.03 60.83 -0.00
12 0.0716 -1630.85 0.02 60.97 -0.01
13 0.0794 -1832.11 -0.03 64.70 -0.00
14 0.0796 -1838.66 -0.02 64.83 -0.00
15 0.0799 -1845.30 -0.02 64.98 -0.00
16 0.2131 -5254.82 0.00 35.38 -0.02
17 0.2133 -5259.68 -0.00 35.20 -0.02
18 0.2135 -5264.49 -0.01 35.04 -0.02
19 0.2185 -5368.00 0.00 30.70 0.02
20 0.2187 -5373.18 0.00 30.48 0.02
21 0.2190 -5378.27 0.01 30.29 0.03
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.
20KF54 quality flag:1 Type: SCATNEAR CLASSICAL SCATNEAR axisobj 43.547 46.587 41.655 ecceobj 0.121 0.151 0.167 incobj 2.914 2.909 2.920 qmin 36.967 38.999 33.689 qmax 51.064 55.097 50.399 amean 43.756 46.865 41.673 amin 43.271 46.449 41.195 amax 44.242 47.326 42.275 emean 0.115 0.151 0.157 emin 0.077 0.137 0.114 emax 0.154 0.165 0.193 imean 4.793 4.084 3.665 imin 3.554 3.535 1.132 imax 5.915 4.554 7.198 excite_mean 0.142 0.167 0.171 fracstop 1.000 1.000 1.000 cjmean 3.073 3.102 3.041 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 182.4 176.2 180.0 kozaiamp 180.0 180.0 180.0