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: 20KH54
# Created Mon Apr 28 01:11:21 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 0.015628 0.000004 -0.000708 0.022053 0.000000
# Chi-squared of fit: 0.61 DOF: 36 RMS: 0.03
# Min/Max residuals: -0.06 0.06
# Exact a, adot, b, bdot, g, gdot:
1.489969E-05 2.162551E-02 -6.185174E-07 -7.143298E-04 2.307529E-02 3.420766E-03
# Covariance matrix:
2.1050E-13 -1.0617E-11 5.2513E-15 -1.3888E-15 -1.1850E-12 1.1907E-10
-1.0617E-11 1.0166E-07 -6.9676E-11 -1.6994E-10 1.9100E-08 3.4203E-07
5.2513E-15 -6.9676E-11 1.8585E-13 -6.7993E-13 -1.3105E-11 -2.3758E-10
-1.3888E-15 -1.6994E-10 -6.7993E-13 9.5723E-12 -3.2093E-11 -6.0965E-10
-1.1850E-12 1.9100E-08 -1.3105E-11 -3.2093E-11 3.5946E-09 6.5666E-08
1.1907E-10 3.4203E-07 -2.3758E-10 -6.0965E-10 6.5666E-08 1.4744E-06
# lat0 lon0 xBary yBary zBary JD0
2.550400 -73.292298 0.672031 0.033358 -0.751781 2458995.943811
# Heliocentric elements and errors
Epoch: 2458990.5000 = 2020/05/21
Mean Anomaly: 76.48317 +/- 12.668
Argument of Peri: 33.61261 +/- 9.827
Long of Asc Node: 159.52844 +/- 0.456
Inclination: 3.10901 +/- 0.018
Eccentricity: 0.14091401 +/- 0.0551
Semi-Major Axis: 44.70098473 +/- 1.5817
Time of Perihelion: 2435798.5393 +/- 3638.7
Perihelion: 38.40198987 +/- 2.8149
Aphelion: 50.99997959 +/- 3.0551
Period (y) 298.8710 +/- 15.86
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 12.02471366 +/- 0.0323
Ecliptic Y -42.38660518 +/- 0.1077
Ecliptic Z 1.92843467 +/- 0.0050
Ecliptic XDOT 0.00258329 +/- 0.0001
Ecliptic YDOT 0.00034920 +/- 0.0001
Ecliptic ZDOT -0.00006684 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.10143873 +/- 0.1039
Geocenter to KBO 43.33640250 +/- 0.1126
# Hcoef: 8.88
The following table shows the complete astrometric record for 20KH54. 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 (20KH54) followed by the observatory code and reference code for the source of the astrometry.
2020 05 26.44301 19 11 07.342 -19 51 48.69 25.5r 20KH54 266 C~7ulo 2020 05 26.50149 19 11 07.140 -19 51 48.93 25.5r 20KH54 266 C~7ulo 2020 05 26.55599 19 11 06.951 -19 51 49.14 25.5r 20KH54 266 C~7ulo 2020 05 29.44698 19 10 56.882 -19 52 00.94 25.4r 20KH54 266 C~6c5Z 2020 05 29.53511 19 10 56.559 -19 52 01.33 25.4r 20KH54 266 C~6c5Z 2020 05 29.61905 19 10 56.252 -19 52 01.69 25.4r 20KH54 266 C~6c5Z 2020 05 31.44139 19 10 49.630 -19 52 09.80 25.4r 20KH54 266 C~6c5Z 2020 05 31.52961 19 10 49.297 -19 52 10.21 25.4r 20KH54 266 C~6c5Z 2020 05 31.61814 19 10 48.962 -19 52 10.61 25.4r 20KH54 266 C~6c5Z 2020 06 21.45390 19 09 21.266 -19 54 14.81 25.4r 20KH54 266 C~6c5Z 2020 06 21.53376 19 09 20.891 -19 54 15.38 25.4r 20KH54 266 C~6c5Z 2020 06 21.61261 19 09 20.522 -19 54 15.92 25.4r 20KH54 266 C~6c5Z 2020 06 24.43648 19 09 07.397 -19 54 36.61 24.5r 20KH54 266 C~7ulo 2020 06 24.48544 19 09 07.163 -19 54 36.97 24.5r 20KH54 266 C~7ulo 2020 06 24.53438 19 09 06.930 -19 54 37.33 24.5r 20KH54 266 C~7ulo 2020 08 12.26680 19 05 24.772 -20 01 32.25 25.4r 20KH54 266 C~6c5Z 2020 08 12.34843 19 05 24.456 -20 01 32.95 25.4r 20KH54 266 C~6c5Z 2020 08 12.42950 19 05 24.143 -20 01 33.63 25.4r 20KH54 266 C~6c5Z 2020 08 14.24286 19 05 17.398 -20 01 49.01 25.2r 20KH54 266 C~6c5Z 2020 08 14.33285 19 05 17.060 -20 01 49.77 25.2r 20KH54 266 C~6c5Z 2020 08 14.42134 19 05 16.728 -20 01 50.50 25.2r 20KH54 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 -0.02 0.00 0.03
2 0.0002 -2.86 -0.01 0.11 0.02
3 0.0003 -5.53 -0.00 0.22 0.02
4 0.0082 -147.96 0.01 5.76 -0.01
5 0.0085 -152.53 -0.00 5.93 -0.01
6 0.0087 -156.87 0.01 6.10 -0.01
7 0.0137 -250.58 -0.00 9.37 -0.01
8 0.0139 -255.30 0.00 9.54 -0.00
9 0.0142 -260.04 0.00 9.71 -0.01
10 0.0712 -1503.02 0.06 34.93 0.00
11 0.0714 -1508.34 0.06 34.99 0.00
12 0.0716 -1513.57 0.06 35.07 0.01
13 0.0794 -1699.84 -0.06 36.52 -0.03
14 0.0795 -1703.16 -0.06 36.56 -0.02
15 0.0796 -1706.47 -0.06 36.59 -0.02
16 0.2131 -4866.35 0.02 -12.55 0.05
17 0.2133 -4870.85 0.02 -12.74 0.05
18 0.2135 -4875.32 0.02 -12.92 0.04
19 0.2185 -4971.56 -0.01 -17.45 -0.04
20 0.2187 -4976.38 -0.01 -17.67 -0.04
21 0.2190 -4981.11 -0.02 -17.87 -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.
20KH54 quality flag:1 Type: CLASSICAL SCATNEAR SCATNEAR axisobj 44.114 50.963 40.319 ecceobj 0.138 0.288 0.110 incobj 3.109 3.059 3.169 qmin 37.428 35.755 32.739 qmax 51.656 67.819 48.640 amean 44.364 51.295 40.539 amin 43.997 50.626 39.989 amax 44.772 52.043 40.920 emean 0.133 0.287 0.108 emin 0.116 0.272 0.052 emax 0.154 0.303 0.191 imean 3.067 2.732 6.700 imin 1.995 2.068 2.223 imax 4.017 3.402 13.174 excite_mean 0.144 0.291 0.160 fracstop 1.000 1.000 1.000 cjmean 3.080 3.084 3.030 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 179.8 174.8 179.9 kozaiamp 179.9 179.9 180.0