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: 20KB54
# Created Sun Apr 27 01:11:20 2025
# Orbit generated from Bernstein formalism
# Fitting 24 observations of 24
# Arc: 75.98d
# First observation: 2020/05/30
# Last observation: 2020/08/14
Preliminary a, adot, b, bdot, g, gdot:
0.000000 0.015720 0.000004 -0.000581 0.021929 0.000000
# Chi-squared of fit: 0.19 DOF: 42 RMS: 0.02
# Min/Max residuals: -0.03 0.05
# Exact a, adot, b, bdot, g, gdot:
1.471813E-05 2.140022E-02 -3.906470E-07 -5.747533E-04 2.289652E-02 1.356722E-03
# Covariance matrix:
2.8958E-13 5.3581E-11 -4.2581E-14 2.4075E-14 1.0965E-11 3.7641E-10
5.3581E-11 1.4878E-07 -1.1064E-10 1.0887E-10 2.7547E-08 4.6671E-07
-4.2581E-14 -1.1064E-10 2.3236E-13 -9.6313E-13 -2.0502E-11 -3.5066E-10
2.4075E-14 1.0887E-10 -9.6313E-13 8.8247E-12 2.0043E-11 3.1442E-10
1.0965E-11 2.7547E-08 -2.0502E-11 2.0043E-11 5.1071E-09 8.7930E-08
3.7641E-10 4.6671E-07 -3.5066E-10 3.1442E-10 8.7930E-08 1.8174E-06
# lat0 lon0 xBary yBary zBary JD0
2.317344 -72.708128 0.628172 0.031804 -0.789088 2458999.940151
# Heliocentric elements and errors
Epoch: 2458990.5000 = 2020/05/21
Mean Anomaly: 92.34029 +/- 45.855
Argument of Peri: 25.46282 +/- 41.332
Long of Asc Node: 163.05270 +/- 0.574
Inclination: 2.72622 +/- 0.018
Eccentricity: 0.04884102 +/- 0.0584
Semi-Major Axis: 44.28197581 +/- 1.3423
Time of Perihelion: 2431382.9633 +/- 13651.9
Perihelion: 42.11919877 +/- 2.8821
Aphelion: 46.44475286 +/- 2.9426
Period (y) 294.6787 +/- 13.40
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 12.61185329 +/- 0.0405
Ecliptic Y -42.61428066 +/- 0.1300
Ecliptic Z 1.76601021 +/- 0.0055
Ecliptic XDOT 0.00250040 +/- 0.0001
Ecliptic YDOT 0.00060675 +/- 0.0001
Ecliptic ZDOT -0.00006234 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.47644940 +/- 0.1251
Geocenter to KBO 43.67476211 +/- 0.1363
# Hcoef: 9.25
The following table shows the complete astrometric record for 20KB54. 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 (20KB54) followed by the observatory code and reference code for the source of the astrometry.
2020 05 30.43935 19 13 42.569 -20 01 21.30 25.5r 20KB54 266 C~6c5Y 2020 05 30.53044 19 13 42.237 -20 01 21.74 25.5r 20KB54 266 C~6c5Y 2020 05 30.61862 19 13 41.914 -20 01 22.14 25.5r 20KB54 266 C~6c5Y 2020 06 01.43269 19 13 35.336 -20 01 30.91 26.0r 20KB54 266 C~6c5Y 2020 06 01.47325 19 13 35.184 -20 01 31.12 26.0r 20KB54 266 C~6c5Y 2020 06 01.60571 19 13 34.684 -20 01 31.78 26.0r 20KB54 266 C~6c5Y 2020 06 20.45583 19 12 16.395 -20 03 28.39 25.6r 20KB54 266 C~6c5Y 2020 06 20.52860 19 12 16.060 -20 03 28.91 25.6r 20KB54 266 C~6c5Y 2020 06 20.62233 19 12 15.628 -20 03 29.57 25.6r 20KB54 266 C~6c5Y 2020 06 22.44948 19 12 07.311 -20 03 43.02 25.5r 20KB54 266 C~6c5Y 2020 06 22.52092 19 12 06.977 -20 03 43.55 25.5r 20KB54 266 C~6c5Y 2020 06 22.59118 19 12 06.650 -20 03 44.06 25.5r 20KB54 266 C~6c5Y 2020 06 25.44823 19 11 53.452 -20 04 05.76 25.4r 20KB54 266 C~6c5Y 2020 06 25.53213 19 11 53.054 -20 04 06.40 25.4r 20KB54 266 C~6c5Y 2020 06 25.61487 19 11 52.663 -20 04 07.02 25.4r 20KB54 266 C~6c5Y 2020 08 12.26680 19 08 16.482 -20 10 58.12 26.1r 20KB54 266 C~6c5Y 2020 08 12.34843 19 08 16.165 -20 10 58.82 26.1r 20KB54 266 C~6c5Y 2020 08 12.42950 19 08 15.851 -20 10 59.49 26.1r 20KB54 266 C~6c5Y 2020 08 13.24332 19 08 12.796 -20 11 06.29 25.7r 20KB54 266 C~6c5Y 2020 08 13.33331 19 08 12.452 -20 11 07.05 25.7r 20KB54 266 C~6c5Y 2020 08 13.42301 19 08 12.109 -20 11 07.79 25.7r 20KB54 266 C~6c5Y 2020 08 14.24286 19 08 09.079 -20 11 14.72 25.5r 20KB54 266 C~6c5Y 2020 08 14.33285 19 08 08.740 -20 11 15.48 25.5r 20KB54 266 C~6c5Y 2020 08 14.42134 19 08 08.407 -20 11 16.21 25.5r 20KB54 266 C~6c5Y
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 0.01 0.00 -0.00
2 0.0002 -4.70 0.02 0.15 -0.00
3 0.0005 -9.26 0.01 0.33 0.00
4 0.0055 -102.34 -0.02 3.28 -0.01
5 0.0056 -104.49 -0.01 3.35 -0.01
6 0.0059 -111.56 -0.01 3.58 -0.01
7 0.0575 -1220.73 -0.01 25.42 -0.01
8 0.0577 -1225.48 -0.00 25.49 -0.00
9 0.0580 -1231.60 -0.01 25.59 0.00
10 0.0630 -1349.55 0.00 26.73 0.01
11 0.0632 -1354.29 -0.00 26.78 0.02
12 0.0634 -1358.92 0.00 26.84 0.02
13 0.0712 -1546.14 0.01 28.24 0.00
14 0.0714 -1551.79 0.01 28.30 0.00
15 0.0717 -1557.33 0.01 28.36 0.00
16 0.2021 -4630.14 0.01 -13.05 -0.01
17 0.2024 -4634.65 0.00 -13.22 -0.02
18 0.2026 -4639.13 0.01 -13.36 -0.01
19 0.2048 -4682.66 -0.01 -15.05 0.04
20 0.2050 -4687.56 -0.00 -15.24 0.04
21 0.2053 -4692.45 -0.01 -15.41 0.05
22 0.2075 -4735.65 -0.00 -17.27 -0.03
23 0.2078 -4740.48 -0.00 -17.46 -0.03
24 0.2080 -4745.22 -0.00 -17.64 -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.
20KB54 quality flag:1 Type: CLASSICAL SCATNEAR SCATNEAR axisobj 43.735 50.318 40.457 ecceobj 0.048 0.224 0.145 incobj 2.726 2.676 2.785 qmin 40.981 38.527 33.566 qmax 47.179 63.362 48.755 amean 43.971 50.650 40.794 amin 43.625 50.146 40.190 amax 44.330 51.215 41.409 emean 0.049 0.226 0.152 emin 0.033 0.215 0.122 emax 0.065 0.238 0.179 imean 2.792 2.448 1.735 imin 2.101 2.104 1.096 imax 3.485 2.767 2.333 excite_mean 0.069 0.230 0.155 fracstop 1.000 1.000 1.000 cjmean 3.095 3.119 3.039 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 176.9 178.1 181.4 kozaiamp 180.0 180.0 179.9