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: 20KS55
# 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:
0.000004 0.015668 0.000007 0.010817 0.022853 0.000000
# Chi-squared of fit: 1.33 DOF: 36 RMS: 0.04
# Min/Max residuals: -0.08 0.07
# Exact a, adot, b, bdot, g, gdot:
1.502442E-05 2.336378E-02 7.392520E-06 1.081331E-02 2.419138E-02 7.131673E-03
# Covariance matrix:
2.1203E-13 -1.6166E-11 4.4640E-15 2.6951E-13 -2.2002E-12 1.0238E-10
-1.6166E-11 7.1369E-08 -6.2575E-11 4.0592E-10 1.3222E-08 1.8949E-07
4.4640E-15 -6.2575E-11 1.9418E-13 -1.1991E-12 -1.1677E-11 -1.8445E-10
2.6951E-13 4.0592E-10 -1.1991E-12 1.3411E-11 7.8485E-11 1.8021E-09
-2.2002E-12 1.3222E-08 -1.1677E-11 7.8485E-11 2.4558E-09 3.6423E-08
1.0238E-10 1.8949E-07 -1.8445E-10 1.8021E-09 3.6423E-08 7.9369E-07
# lat0 lon0 xBary yBary zBary JD0
2.741514 -73.974366 0.663025 0.036246 -0.759603 2458995.943811
# Heliocentric elements and errors
Epoch: 2458990.5000 = 2020/05/21
Mean Anomaly: 24.22811 +/- 1.895
Argument of Peri: 311.54931 +/- 2.274
Long of Asc Node: 279.30130 +/- 0.069
Inclination: 24.85140 +/- 0.251
Eccentricity: 0.38954822 +/- 0.0432
Semi-Major Axis: 60.77218644 +/- 3.0451
Time of Perihelion: 2447344.6085 +/- 252.6
Perihelion: 37.09848910 +/- 3.2157
Aphelion: 84.44588377 +/- 4.9790
Period (y) 473.7678 +/- 35.61
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 10.97702649 +/- 0.0234
Ecliptic Y -40.60595318 +/- 0.0813
Ecliptic Z 1.97753466 +/- 0.0041
Ecliptic XDOT 0.00275596 +/- 0.0000
Ecliptic YDOT 0.00001487 +/- 0.0001
Ecliptic ZDOT 0.00126076 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 42.10996542 +/- 0.0786
Geocenter to KBO 41.33704279 +/- 0.0847
# Hcoef: 9.70
The following table shows the complete astrometric record for 20KS55. 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 (20KS55) followed by the observatory code and reference code for the source of the astrometry.
2020 05 26.44301 19 08 08.965 -19 45 17.80 26.0r 20KS55 266 C~6c5c 2020 05 26.50149 19 08 08.748 -19 45 17.65 26.0r 20KS55 266 C~6c5c 2020 05 26.55599 19 08 08.545 -19 45 17.50 26.0r 20KS55 266 C~6c5c 2020 05 29.44698 19 07 57.772 -19 45 09.93 25.7r 20KS55 266 C~6c5c 2020 05 29.53371 19 07 57.434 -19 45 09.74 25.7r 20KS55 266 C~6c5c 2020 05 29.61905 19 07 57.100 -19 45 09.53 25.7r 20KS55 266 C~6c5c 2020 05 31.44139 19 07 50.033 -19 45 05.46 25.8r 20KS55 266 C~6c5c 2020 05 31.52961 19 07 49.678 -19 45 05.29 25.8r 20KS55 266 C~6c5c 2020 05 31.61814 19 07 49.321 -19 45 05.10 25.8r 20KS55 266 C~6c5c 2020 06 21.45390 19 06 16.221 -19 44 51.39 25.9r 20KS55 266 C~6c5c 2020 06 21.53376 19 06 15.825 -19 44 51.44 25.9r 20KS55 266 C~6c5c 2020 06 21.61261 19 06 15.434 -19 44 51.46 25.9r 20KS55 266 C~6c5c 2020 06 24.43648 19 06 01.568 -19 44 53.44 25.9r 20KS55 266 C~6c5c 2020 06 24.52739 19 06 01.110 -19 44 53.52 25.9r 20KS55 266 C~6c5c 2020 06 24.61708 19 06 00.660 -19 44 53.58 25.9r 20KS55 266 C~6c5c 2020 08 12.26680 19 02 08.159 -19 46 36.96 26.4r 20KS55 266 C~6c5c 2020 08 12.34843 19 02 07.831 -19 46 37.15 26.4r 20KS55 266 C~6c5c 2020 08 12.42950 19 02 07.506 -19 46 37.33 26.4r 20KS55 266 C~6c5c 2020 08 14.24286 19 02 00.501 -19 46 41.57 25.5r 20KS55 266 C~6c5c 2020 08 14.33285 19 02 00.151 -19 46 41.78 25.5r 20KS55 266 C~6c5c 2020 08 14.42134 19 01 59.806 -19 46 41.97 25.5r 20KS55 266 C~6c5c
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 0.05 0.00 -0.07
2 0.0002 -3.03 0.05 0.51 -0.07
3 0.0003 -5.85 0.04 0.99 -0.07
4 0.0082 -156.02 -0.05 26.23 0.02
5 0.0085 -160.74 -0.04 26.98 0.01
6 0.0087 -165.40 -0.04 27.73 0.01
7 0.0137 -264.01 -0.02 43.38 0.06
8 0.0139 -268.97 -0.01 44.13 0.06
9 0.0142 -273.96 -0.01 44.91 0.06
10 0.0712 -1578.04 0.02 209.76 -0.04
11 0.0714 -1583.60 0.03 210.35 -0.05
12 0.0716 -1589.08 0.02 210.96 -0.04
13 0.0794 -1783.81 -0.01 231.26 0.05
14 0.0796 -1790.24 -0.01 231.91 0.05
15 0.0799 -1796.56 -0.01 232.58 0.04
16 0.2131 -5070.92 0.01 493.27 0.07
17 0.2133 -5075.55 0.01 493.58 0.07
18 0.2135 -5080.13 0.02 493.90 0.06
19 0.2185 -5178.95 -0.02 500.34 -0.07
20 0.2187 -5183.89 -0.01 500.67 -0.07
21 0.2190 -5188.75 -0.02 501.00 -0.08
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.
20KS55 quality flag:1 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 59.592 72.321 51.942 ecceobj 0.379 0.510 0.256 incobj 24.957 24.198 25.803 qmin 35.920 34.060 37.688 qmax 85.416 114.251 67.512 amean 60.088 73.129 52.318 amin 59.405 72.099 51.841 amax 60.979 74.563 52.925 emean 0.381 0.514 0.260 emin 0.364 0.496 0.244 emax 0.401 0.534 0.277 imean 26.602 25.763 27.376 imin 25.983 24.755 26.970 imax 27.251 26.874 27.824 excite_mean 0.588 0.674 0.528 fracstop 1.000 1.000 1.000 cjmean 2.835 2.818 2.836 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 183.3 174.3 165.5 kozaiamp 180.0 180.0 179.9