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: 20KJ56
# Created Sat May 4 01:18:37 2024
# Orbit generated from Bernstein formalism
# Fitting 32 observations of 32
# Arc: 2.96y
# First observation: 2018/06/16
# Last observation: 2021/06/02
Preliminary a, adot, b, bdot, g, gdot:
-0.000004 0.023234 0.000000 -0.000711 0.023869 0.000000
# Chi-squared of fit: 3.17 DOF: 58 RMS: 0.06
# Min/Max residuals: -0.17 0.20
# Exact a, adot, b, bdot, g, gdot:
1.484196E-05 2.325277E-02 -8.268413E-09 -7.125731E-04 2.388632E-02 5.908408E-05
# Covariance matrix:
4.8839E-13 -3.9822E-13 -2.9562E-15 6.8186E-15 -1.8177E-13 -3.3249E-12
-3.9822E-13 6.1752E-13 6.9691E-15 -1.5996E-14 4.8790E-13 7.8395E-12
-2.9562E-15 6.9691E-15 3.9073E-13 -1.7376E-13 6.3878E-15 1.0306E-13
6.8186E-15 -1.5996E-14 -1.7376E-13 8.7869E-14 -1.4332E-14 -2.3658E-13
-1.8177E-13 4.8790E-13 6.3878E-15 -1.4332E-14 6.9557E-13 7.1910E-12
-3.3249E-12 7.8395E-12 1.0306E-13 -2.3658E-13 7.1910E-12 1.1593E-10
# lat0 lon0 xBary yBary zBary JD0
2.154215 -75.216884 0.345959 0.035684 -0.947151 2458285.658655
# Heliocentric elements and errors
Epoch: 2458280.5000 = 2018/06/11
Mean Anomaly: 354.18139 +/- 0.753
Argument of Peri: 135.78666 +/- 0.807
Long of Asc Node: 154.70601 +/- 0.011
Inclination: 2.73311 +/- 0.000
Eccentricity: 0.03358360 +/- 0.0001
Semi-Major Axis: 44.29958369 +/- 0.0045
Time of Perihelion: 2460021.1637 +/- 225.3
Perihelion: 42.81184404 +/- 0.0060
Aphelion: 45.78732335 +/- 0.0063
Period (y) 294.8544 +/- 0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 10.58195919 +/- 0.0004
Ecliptic Y -41.46200744 +/- 0.0014
Ecliptic Z 1.57371212 +/- 0.0001
Ecliptic XDOT 0.00258655 +/- 0.0000
Ecliptic YDOT 0.00066674 +/- 0.0000
Ecliptic ZDOT -0.00008153 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 42.82000106 +/- 0.0014
Geocenter to KBO 41.86497183 +/- 0.0015
# Hcoef: 6.45
The following table shows the complete astrometric record for 20KJ56. 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 (20KJ56) followed by the observatory code and reference code for the source of the astrometry.
2018 06 16.157854 19 03 10.58 -20 28 41.5 20KJ56 W84 C~7Bjx 2018 06 16.375138 19 03 09.54 -20 28 42.7 20KJ56 W84 C~7Bjx 2018 06 16.432207 19 03 09.29 -20 28 43.2 20KJ56 W84 C~7Bjx 2020 05 28.44674 19 15 46.106 -20 12 56.70 22.8r 20KJ56 266 C~6c5d 2020 05 28.50129 19 15 45.910 -20 12 56.98 22.8r 20KJ56 266 C~6c5d 2020 05 28.55756 19 15 45.707 -20 12 57.26 22.8r 20KJ56 266 C~6c5d 2020 05 30.43935 19 15 38.967 -20 13 06.78 22.5r 20KJ56 266 C~6c5d 2020 05 30.53044 19 15 38.627 -20 13 07.26 22.5r 20KJ56 266 C~6c5d 2020 05 30.61862 19 15 38.297 -20 13 07.72 22.5r 20KJ56 266 C~6c5d 2020 06 01.43269 19 15 31.577 -20 13 17.43 23.0r 20KJ56 266 C~6c5d 2020 06 01.47325 19 15 31.421 -20 13 17.66 23.0r 20KJ56 266 C~6c5d 2020 06 01.60571 19 15 30.910 -20 13 18.39 23.0r 20KJ56 266 C~6c5d 2020 06 20.45583 19 14 10.547 -20 15 25.75 22.6r 20KJ56 266 C~6c5d 2020 06 20.52860 19 14 10.201 -20 15 26.32 22.6r 20KJ56 266 C~6c5d 2020 06 20.62233 19 14 09.757 -20 15 27.03 22.6r 20KJ56 266 C~6c5d 2020 06 22.44948 19 14 01.193 -20 15 41.56 22.5r 20KJ56 266 C~6c5d 2020 06 22.52092 19 14 00.849 -20 15 42.13 22.5r 20KJ56 266 C~6c5d 2020 06 22.59118 19 14 00.512 -20 15 42.68 22.5r 20KJ56 266 C~6c5d 2020 06 25.44823 19 13 46.916 -20 16 06.05 22.5r 20KJ56 266 C~6c5d 2020 06 25.53213 19 13 46.506 -20 16 06.74 22.5r 20KJ56 266 C~6c5d 2020 06 25.61487 19 13 46.103 -20 16 07.41 22.5r 20KJ56 266 C~6c5d 2020 08 13.24332 19 09 58.649 -20 23 30.69 23.0r 20KJ56 266 C~6c5d 2020 08 13.33331 19 09 58.292 -20 23 31.49 23.0r 20KJ56 266 C~6c5d 2020 08 13.42301 19 09 57.936 -20 23 32.26 23.0r 20KJ56 266 C~6c5d 2020 08 15.24331 19 09 50.989 -20 23 48.00 22.7r 20KJ56 266 C~6c5d 2020 08 15.33985 19 09 50.617 -20 23 48.84 22.7r 20KJ56 266 C~6c5d 2020 08 15.42111 19 09 50.304 -20 23 49.53 22.7r 20KJ56 266 C~6c5d 2021 06 02.637224 19 21 07.177 -20 05 18.85 20KJ56 250 S~7Bjx 2021 06 02.643543 19 21 07.146 -20 05 18.92 20KJ56 250 S~7Bjx 2021 06 02.649863 19 21 07.115 -20 05 18.94 20KJ56 250 S~7Bjx 2021 06 02.656182 19 21 07.083 -20 05 18.90 20KJ56 250 S~7Bjx 2021 06 02.662502 19 21 07.055 -20 05 18.85 20KJ56 250 S~7Bjx
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 0.11 0.00 -0.10
2 0.0006 -14.66 -0.16 0.39 0.12
3 0.0008 -18.20 0.05 0.27 -0.06
4 1.9501 10672.40 0.01 -314.40 0.01
5 1.9503 10669.62 0.01 -314.33 0.01
6 1.9504 10666.75 0.01 -314.24 0.01
7 1.9556 10571.18 -0.01 -311.61 -0.00
8 1.9558 10566.36 -0.01 -311.47 0.01
9 1.9561 10561.68 -0.01 -311.34 -0.00
10 1.9611 10466.38 0.02 -308.95 0.01
11 1.9612 10464.17 0.02 -308.90 0.01
12 1.9615 10456.92 0.02 -308.71 0.01
13 2.0131 9316.25 -0.01 -292.56 -0.00
14 2.0133 9311.34 -0.01 -292.51 -0.00
15 2.0136 9305.04 -0.01 -292.44 0.00
16 2.0186 9183.41 -0.01 -291.81 0.01
17 2.0188 9178.53 -0.02 -291.77 0.01
18 2.0190 9173.75 -0.01 -291.72 0.02
19 2.0268 8980.64 0.00 -291.08 0.00
20 2.0270 8974.82 0.00 -291.05 0.01
21 2.0273 8969.09 0.00 -291.01 0.00
22 2.1604 5735.50 0.00 -342.28 -0.01
23 2.1606 5730.42 0.00 -342.48 -0.01
24 2.1609 5725.35 -0.00 -342.65 -0.01
25 2.1659 5626.43 0.01 -346.70 0.01
26 2.1661 5621.13 0.01 -346.92 0.01
27 2.1664 5616.68 -0.00 -347.08 0.01
28 2.9637 15232.70 0.20 -454.75 -0.08
29 2.9637 15232.26 0.09 -454.77 -0.10
30 2.9637 15231.82 -0.01 -454.73 -0.06
31 2.9637 15231.38 -0.12 -454.62 0.03
32 2.9637 15230.99 -0.17 -454.52 0.12
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.
20KJ56 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.849 43.861 43.837 ecceobj 0.027 0.027 0.026 incobj 2.729 2.729 2.729 qmin 42.156 42.154 42.171 qmax 46.133 46.150 46.108 amean 44.073 44.085 44.061 amin 43.734 43.751 43.720 amax 44.415 44.423 44.411 emean 0.025 0.025 0.025 emin 0.009 0.010 0.009 emax 0.040 0.039 0.039 imean 2.612 2.610 2.614 imin 1.999 2.000 1.998 imax 3.225 3.221 3.228 excite_mean 0.052 0.053 0.052 fracstop 1.000 1.000 1.000 cjmean 3.099 3.099 3.099 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 173.2 174.0 173.6 kozaiamp 180.0 179.9 180.0