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: 20KJ60
# Created Mon Apr 28 01:11:22 2025
# Orbit generated from Bernstein formalism
# Fitting 18 observations of 18
# Arc: 78.95d
# First observation: 2020/05/28
# Last observation: 2020/08/15
Preliminary a, adot, b, bdot, g, gdot:
0.000004 0.016211 0.000004 -0.000698 0.022100 0.000000
# Chi-squared of fit: 6.62 DOF: 30 RMS: 0.11
# Min/Max residuals: -0.30 0.21
# Exact a, adot, b, bdot, g, gdot:
1.469552E-05 2.189792E-02 1.884131E-07 -6.991209E-04 2.305027E-02 -2.182184E-03
# Covariance matrix:
2.6031E-13 3.0014E-12 -3.4668E-15 -2.6334E-14 1.5466E-12 1.9897E-10
3.0014E-12 1.8601E-07 -1.0308E-10 -1.5003E-10 3.4651E-08 5.7358E-07
-3.4668E-15 -1.0308E-10 2.2240E-13 -8.9992E-13 -1.9214E-11 -3.2035E-10
-2.6334E-14 -1.5003E-10 -8.9992E-13 1.1633E-11 -2.8147E-11 -5.0813E-10
1.5466E-12 3.4651E-08 -1.9214E-11 -2.8147E-11 6.4623E-09 1.0844E-07
1.9897E-10 5.7358E-07 -3.2035E-10 -5.0813E-10 1.0844E-07 2.1358E-06
# lat0 lon0 xBary yBary zBary JD0
1.948073 -72.468685 0.657109 0.025901 -0.765273 2458997.971341
# Heliocentric elements and errors
Epoch: 2458990.5000 = 2020/05/21
Mean Anomaly: 290.12894 +/- 10.315
Argument of Peri: 216.29812 +/- 19.405
Long of Asc Node: 153.34693 +/- 0.628
Inclination: 2.63038 +/- 0.027
Eccentricity: 0.11708301 +/- 0.0622
Semi-Major Axis: 45.41513833 +/- 0.6974
Time of Perihelion: 2480687.2277 +/- 3163.7
Perihelion: 40.09779727 +/- 2.8911
Aphelion: 50.73247939 +/- 2.9302
Period (y) 306.0618 +/- 7.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 12.67040327 +/- 0.0456
Ecliptic Y -42.27940147 +/- 0.1442
Ecliptic Z 1.47484415 +/- 0.0052
Ecliptic XDOT 0.00241111 +/- 0.0001
Ecliptic YDOT 0.00103134 +/- 0.0002
Ecliptic ZDOT -0.00009204 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.16177162 +/- 0.1387
Geocenter to KBO 43.38343662 +/- 0.1513
# Hcoef: 8.64
The following table shows the complete astrometric record for 20KJ60. 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 (20KJ60) followed by the observatory code and reference code for the source of the astrometry.
2020 05 28.47054 19 14 55.237 -20 21 30.70 25.9r 20KJ60 266 C~6wsS 2020 05 28.55757 19 14 54.902 -20 21 31.03 25.9r 20KJ60 266 C~6wsS 2020 05 30.48152 19 14 48.180 -20 21 40.44 26.1r 20KJ60 266 C~6wsS 2020 05 30.61166 19 14 47.700 -20 21 41.10 26.1r 20KJ60 266 C~6wsS 2020 06 01.43269 19 14 41.085 -20 21 50.99 24.9r 20KJ60 266 C~7ulo 2020 06 01.47325 19 14 40.932 -20 21 51.22 24.9r 20KJ60 266 C~7ulo 2020 06 01.60571 19 14 40.432 -20 21 51.94 24.9r 20KJ60 266 C~7ulo 2020 06 22.44948 19 13 12.764 -20 24 11.29 24.5r 20KJ60 266 C~7ulo 2020 06 22.52092 19 13 12.429 -20 24 11.84 24.5r 20KJ60 266 C~7ulo 2020 06 22.59118 19 13 12.099 -20 24 12.38 24.5r 20KJ60 266 C~7ulo 2020 06 25.44823 19 12 58.840 -20 24 35.10 24.5r 20KJ60 266 C~7ulo 2020 06 25.53072 19 12 58.447 -20 24 35.76 24.5r 20KJ60 266 C~7ulo 2020 06 25.61487 19 12 58.047 -20 24 36.42 24.5r 20KJ60 266 C~7ulo 2020 08 13.28708 19 09 16.245 -20 31 42.29 25.7r 20KJ60 266 C~6wsS 2020 08 13.41742 19 09 15.731 -20 31 43.14 25.7r 20KJ60 266 C~6wsS 2020 08 15.24331 19 09 08.934 -20 31 58.51 24.4r 20KJ60 266 C~7ulo 2020 08 15.34125 19 09 08.567 -20 31 59.32 24.4r 20KJ60 266 C~7ulo 2020 08 15.42111 19 09 08.268 -20 31 59.96 24.4r 20KJ60 266 C~7ulo
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 0.07 0.00 -0.14
2 0.0002 -4.71 -0.30 0.27 0.01
3 0.0055 -99.67 0.18 3.01 0.14
4 0.0059 -106.45 0.13 3.22 0.16
5 0.0108 -199.98 -0.01 5.28 -0.11
6 0.0110 -202.14 -0.02 5.32 -0.11
7 0.0113 -209.21 -0.01 5.50 -0.12
8 0.0684 -1449.63 -0.06 23.00 0.09
9 0.0686 -1454.37 -0.05 23.04 0.10
10 0.0688 -1459.05 -0.06 23.09 0.09
11 0.0766 -1646.84 0.04 23.85 -0.02
12 0.0768 -1652.40 0.04 23.89 -0.02
13 0.0771 -1658.06 0.04 23.94 -0.02
14 0.2103 -4804.53 0.18 -18.29 -0.03
15 0.2107 -4811.80 0.07 -18.27 0.21
16 0.2157 -4908.49 -0.08 -22.16 -0.08
17 0.2159 -4913.71 -0.08 -22.35 -0.08
18 0.2162 -4917.95 -0.07 -22.48 -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.
20KJ60 quality flag:1 Type: CLASSICAL CLASSICAL SCATNEAR axisobj 44.878 49.746 42.727 ecceobj 0.119 0.137 0.206 incobj 2.630 2.551 2.701 qmin 38.475 42.432 33.619 qmax 52.079 58.073 52.693 amean 45.109 50.046 42.793 amin 44.700 49.608 42.316 amax 45.547 50.544 43.352 emean 0.126 0.138 0.147 emin 0.107 0.128 0.105 emax 0.144 0.149 0.216 imean 2.517 2.116 4.259 imin 1.724 1.880 1.294 imax 3.272 2.333 6.641 excite_mean 0.133 0.143 0.169 fracstop 1.000 1.000 1.000 cjmean 3.093 3.153 3.053 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 187.5 176.2 185.9 kozaiamp 180.0 180.0 180.0