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: 20KX54
# Created Mon Apr 28 01:11:21 2025
# Orbit generated from Bernstein formalism
# Fitting 18 observations of 18
# Arc: 74.98d
# First observation: 2020/05/30
# Last observation: 2020/08/13
Preliminary a, adot, b, bdot, g, gdot:
0.000001 0.016461 0.000004 -0.000628 0.022202 0.000000
# Chi-squared of fit: 0.28 DOF: 30 RMS: 0.02
# Min/Max residuals: -0.04 0.04
# Exact a, adot, b, bdot, g, gdot:
1.480451E-05 2.182695E-02 -5.998623E-07 -6.342065E-04 2.310987E-02 1.285966E-03
# Covariance matrix:
2.9546E-13 6.6777E-11 -5.0301E-14 -1.3432E-13 1.3492E-11 4.3624E-10
6.6777E-11 1.7932E-07 -1.2793E-10 -2.9494E-10 3.3405E-08 6.0968E-07
-5.0301E-14 -1.2793E-10 2.5161E-13 -9.7702E-13 -2.3849E-11 -4.3840E-10
-1.3432E-13 -2.9494E-10 -9.7702E-13 1.8335E-11 -5.5121E-11 -1.0451E-09
1.3492E-11 3.3405E-08 -2.3849E-11 -5.5121E-11 6.2299E-09 1.1514E-07
4.3624E-10 6.0968E-07 -4.3840E-10 -1.0451E-09 1.1514E-07 2.4578E-06
# lat0 lon0 xBary yBary zBary JD0
2.432411 -72.289283 0.633928 0.033193 -0.784413 2458999.940151
# Heliocentric elements and errors
Epoch: 2458990.5000 = 2020/05/21
Mean Anomaly: 78.56673 +/- 33.337
Argument of Peri: 40.56423 +/- 29.222
Long of Asc Node: 162.64582 +/- 0.595
Inclination: 2.88854 +/- 0.021
Eccentricity: 0.04450208 +/- 0.0746
Semi-Major Axis: 44.37362839 +/- 1.4761
Time of Perihelion: 2435427.9633 +/- 9928.6
Perihelion: 42.39890974 +/- 3.6000
Aphelion: 46.34834705 +/- 3.6534
Period (y) 295.5940 +/- 14.75
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 12.79243790 +/- 0.0449
Ecliptic Y -42.13112949 +/- 0.1407
Ecliptic Z 1.83652525 +/- 0.0063
Ecliptic XDOT 0.00251869 +/- 0.0001
Ecliptic YDOT 0.00064217 +/- 0.0002
Ecliptic ZDOT -0.00006883 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.06871185 +/- 0.1351
Geocenter to KBO 43.27155550 +/- 0.1478
# Hcoef: 10.20
The following table shows the complete astrometric record for 20KX54. 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 (20KX54) followed by the observatory code and reference code for the source of the astrometry.
2020 05 30.43935 19 15 24.803 -19 51 18.72 26.6r 20KX54 266 C~6c5a 2020 05 30.53044 19 15 24.471 -19 51 19.16 26.6r 20KX54 266 C~6c5a 2020 05 30.61862 19 15 24.149 -19 51 19.57 26.6r 20KX54 266 C~6c5a 2020 06 01.43269 19 15 17.578 -19 51 28.48 26.6r 20KX54 266 C~6c5a 2020 06 01.47325 19 15 17.426 -19 51 28.69 26.6r 20KX54 266 C~6c5a 2020 06 01.60571 19 15 16.926 -19 51 29.36 26.6r 20KX54 266 C~6c5a 2020 06 20.45583 19 13 58.533 -19 53 27.99 26.5r 20KX54 266 C~6c5a 2020 06 20.52860 19 13 58.196 -19 53 28.53 26.5r 20KX54 266 C~6c5a 2020 06 20.62233 19 13 57.763 -19 53 29.21 26.5r 20KX54 266 C~6c5a 2020 06 22.44948 19 13 49.416 -19 53 42.98 26.5r 20KX54 266 C~6c5a 2020 06 22.52092 19 13 49.081 -19 53 43.52 26.5r 20KX54 266 C~6c5a 2020 06 22.59118 19 13 48.752 -19 53 44.05 26.5r 20KX54 266 C~6c5a 2020 06 25.44823 19 13 35.501 -19 54 06.30 26.6r 20KX54 266 C~6c5a 2020 06 25.53213 19 13 35.102 -19 54 06.96 26.6r 20KX54 266 C~6c5a 2020 06 25.61487 19 13 34.709 -19 54 07.60 26.6r 20KX54 266 C~6c5a 2020 08 13.24332 19 09 53.159 -20 01 21.37 26.6r 20KX54 266 C~6c5a 2020 08 13.33331 19 09 52.811 -20 01 22.16 26.6r 20KX54 266 C~6c5a 2020 08 13.42301 19 09 52.464 -20 01 22.94 26.6r 20KX54 266 C~6c5a
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 0.03 0.00 0.03
2 0.0002 -4.70 0.03 0.17 0.04
3 0.0005 -9.26 0.03 0.34 0.04
4 0.0055 -102.34 -0.03 3.43 -0.04
5 0.0056 -104.49 -0.03 3.49 -0.04
6 0.0059 -111.58 -0.04 3.74 -0.04
7 0.0575 -1223.55 0.02 27.07 0.00
8 0.0577 -1228.33 0.02 27.14 0.00
9 0.0580 -1234.48 0.02 27.24 -0.00
10 0.0630 -1353.01 0.01 28.46 0.01
11 0.0632 -1357.77 0.01 28.52 0.02
12 0.0634 -1362.44 0.00 28.58 0.01
13 0.0712 -1550.66 -0.02 30.09 -0.01
14 0.0714 -1556.32 -0.01 30.14 -0.01
15 0.0717 -1561.90 -0.02 30.20 -0.01
16 0.2048 -4715.92 -0.00 -15.35 -0.00
17 0.2050 -4720.88 0.00 -15.54 0.00
18 0.2053 -4725.83 -0.00 -15.73 -0.00
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.
20KX54 quality flag:1 Type: CLASSICAL SCATNEAR CLASSICAL axisobj 43.820 51.675 40.384 ecceobj 0.041 0.254 0.158 incobj 2.888 2.833 2.954 qmin 41.412 38.007 33.836 qmax 46.844 66.671 47.624 amean 44.055 52.034 40.554 amin 43.715 51.529 40.170 amax 44.407 52.653 40.978 emean 0.041 0.256 0.140 emin 0.026 0.245 0.119 emax 0.055 0.267 0.162 imean 2.898 2.548 1.682 imin 2.274 2.236 0.317 imax 3.557 2.863 2.726 excite_mean 0.066 0.260 0.144 fracstop 1.000 1.000 1.000 cjmean 3.097 3.117 3.040 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 178.6 184.2 180.1 kozaiamp 179.9 180.0 180.0