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: 20KO55
# Created Sun Dec 22 02:11:12 2024
# Orbit generated from Bernstein formalism
# Fitting 18 observations of 18
# Arc: 76.97d
# First observation: 2020/05/29
# Last observation: 2020/08/14
Preliminary a, adot, b, bdot, g, gdot:
-0.000000 0.016380 0.000004 0.001768 0.021821 0.000000
# Chi-squared of fit: 0.88 DOF: 30 RMS: 0.04
# Min/Max residuals: -0.06 0.07
# Exact a, adot, b, bdot, g, gdot:
1.488724E-05 2.133705E-02 1.258089E-06 1.768880E-03 2.264908E-02 -4.185225E-03
# Covariance matrix:
2.8849E-13 4.9077E-11 -4.0866E-14 1.7500E-13 1.0031E-11 3.3289E-10
4.9077E-11 1.3574E-07 -1.0011E-10 2.4258E-10 2.4932E-08 3.6359E-07
-4.0866E-14 -1.0011E-10 2.4940E-13 -1.2054E-12 -1.8424E-11 -2.7640E-10
1.7500E-13 2.4258E-10 -1.2054E-12 1.1626E-11 4.5307E-11 8.2930E-10
1.0031E-11 2.4932E-08 -1.8424E-11 4.5307E-11 4.5870E-09 6.8526E-08
3.3289E-10 3.6359E-07 -2.7640E-10 8.2930E-10 6.8526E-08 1.3913E-06
# lat0 lon0 xBary yBary zBary JD0
2.686330 -73.826695 0.625899 0.036967 -0.790617 2458998.947781
# Heliocentric elements and errors
Epoch: 2458990.5000 = 2020/05/21
Mean Anomaly: 298.94638 +/- 3.047
Argument of Peri: 114.03191 +/- 7.910
Long of Asc Node: 256.44233 +/- 0.414
Inclination: 5.44056 +/- 0.071
Eccentricity: 0.21445209 +/- 0.0521
Semi-Major Axis: 48.00543983 +/- 0.6809
Time of Perihelion: 2479594.0967 +/- 930.2
Perihelion: 37.71057269 +/- 2.5574
Aphelion: 58.30030697 +/- 2.6340
Period (y) 332.6166 +/- 7.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 11.90971015 +/- 0.0367
Ecliptic Y -43.29927247 +/- 0.1267
Ecliptic Z 2.06944269 +/- 0.0062
Ecliptic XDOT 0.00234173 +/- 0.0001
Ecliptic YDOT 0.00121697 +/- 0.0001
Ecliptic ZDOT 0.00018965 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.95498621 +/- 0.1224
Geocenter to KBO 44.15190263 +/- 0.1320
# Hcoef: 9.56
The following table shows the complete astrometric record for 20KO55. 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 (20KO55) followed by the observatory code and reference code for the source of the astrometry.
2020 05 29.44698 19 08 47.975 -19 47 32.85 26.0r 20KO55 266 C~6c5b 2020 05 29.53371 19 08 47.661 -19 47 33.08 26.0r 20KO55 266 C~6c5b 2020 05 29.61905 19 08 47.351 -19 47 33.30 26.0r 20KO55 266 C~6c5b 2020 05 31.44139 19 08 40.787 -19 47 38.28 26.1r 20KO55 266 C~6c5b 2020 05 31.52961 19 08 40.458 -19 47 38.55 26.1r 20KO55 266 C~6c5b 2020 05 31.61814 19 08 40.126 -19 47 38.80 26.1r 20KO55 266 C~6c5b 2020 06 21.45390 19 07 13.492 -19 49 06.90 26.0r 20KO55 266 C~6c5b 2020 06 21.53376 19 07 13.123 -19 49 07.33 26.0r 20KO55 266 C~6c5b 2020 06 21.61261 19 07 12.759 -19 49 07.74 26.0r 20KO55 266 C~6c5b 2020 06 24.43648 19 06 59.822 -19 49 23.34 25.9r 20KO55 266 C~6c5b 2020 06 24.52739 19 06 59.395 -19 49 23.85 25.9r 20KO55 266 C~6c5b 2020 06 24.61708 19 06 58.975 -19 49 24.34 25.9r 20KO55 266 C~6c5b 2020 08 12.26680 19 03 21.217 -19 54 55.45 25.9r 20KO55 266 C~6c5b 2020 08 12.34843 19 03 20.908 -19 54 56.01 25.9r 20KO55 266 C~6c5b 2020 08 12.42950 19 03 20.602 -19 54 56.56 25.9r 20KO55 266 C~6c5b 2020 08 14.24286 19 03 14.011 -19 55 08.86 26.2r 20KO55 266 C~6c5b 2020 08 14.33285 19 03 13.681 -19 55 09.48 26.2r 20KO55 266 C~6c5b 2020 08 14.42134 19 03 13.356 -19 55 10.07 26.2r 20KO55 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 -0.00
2 0.0002 -4.43 0.01 0.29 0.00
3 0.0005 -8.80 0.01 0.59 -0.00
4 0.0055 -101.38 -0.02 6.55 0.04
5 0.0057 -106.03 -0.01 6.82 0.03
6 0.0059 -110.71 -0.01 7.13 0.03
7 0.0630 -1335.30 0.06 62.07 -0.06
8 0.0632 -1340.52 0.07 62.24 -0.06
9 0.0634 -1345.67 0.07 62.43 -0.06
10 0.0712 -1528.82 -0.06 67.97 0.02
11 0.0714 -1534.87 -0.05 68.16 0.02
12 0.0716 -1540.81 -0.05 68.36 0.02
13 0.2048 -4631.23 -0.04 84.68 -0.04
14 0.2051 -4635.62 -0.04 84.60 -0.03
15 0.2053 -4639.98 -0.03 84.53 -0.04
16 0.2103 -4733.76 0.04 82.50 0.05
17 0.2105 -4738.46 0.04 82.39 0.05
18 0.2107 -4743.08 0.03 82.31 0.05
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.
20KO55 quality flag:1 Type: 2:1E CLASSICAL SCATNEAR axisobj 47.439 50.305 45.361 ecceobj 0.216 0.163 0.238 incobj 5.477 5.264 5.642 qmin 36.617 41.696 31.546 qmax 59.813 59.791 59.552 amean 47.795 50.539 45.296 amin 47.194 50.085 43.965 amax 48.488 51.056 46.158 emean 0.215 0.161 0.245 emin 0.195 0.151 0.216 emax 0.235 0.172 0.303 imean 6.929 6.799 8.649 imin 6.743 6.556 6.987 imax 7.115 7.042 10.949 excite_mean 0.247 0.200 0.288 fracstop 1.000 1.000 1.000 cjmean 3.072 3.135 3.016 libcent 0 179.8 -180.0 -180.0 libamp 0 145.9 -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 196.7 178.0 176.9 kozaiamp 180.0 180.0 180.0