Orbit Fit and Astrometric record for 20KX54

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 Tue Apr  1 01:11:19 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