Orbit Fit and Astrometric record for 20KL54

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: 20KL54    
# Created Tue Apr  1 01:11:19 2025
# Orbit generated from Bernstein formalism
# Fitting     18 observations of     18
# Arc:  76.98d
# First observation: 2020/05/28
#  Last observation: 2020/08/13
Preliminary a, adot, b, bdot, g, gdot:
   0.000004   0.017872   0.000002   0.002626   0.022654   0.000000
# Chi-squared of fit:     0.40 DOF:     30 RMS:  0.03
# Min/Max residuals:    -0.06    0.05
# Exact a, adot, b, bdot, g, gdot:
  1.489029E-05  2.186689E-02  1.759204E-06  2.611785E-03  2.330244E-02 -2.350792E-03
# Covariance matrix:
  2.0691E-13  3.5708E-11 -2.0390E-14  1.0340E-13  7.6036E-12  3.0495E-10
  3.5708E-11  2.2594E-07 -1.0788E-10  5.9362E-11  4.2728E-08  8.6623E-07
 -2.0390E-14 -1.0788E-10  1.8713E-13 -9.4678E-13 -2.0434E-11 -4.2093E-10
  1.0340E-13  5.9362E-11 -9.4678E-13  1.5564E-11  1.2197E-11  4.6319E-10
  7.6036E-12  4.2728E-08 -2.0434E-11  1.2197E-11  8.0880E-09  1.6553E-07
  3.0495E-10  8.6623E-07 -4.2093E-10  4.6319E-10  1.6553E-07  3.7347E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.915313  -72.428337    0.657959    0.025440   -0.764558  2458997.947541
# Heliocentric elements and errors
Epoch:              2458990.5000  =  2020/05/21
Mean Anomaly:          279.99052 +/-     4.310
Argument of Peri:      109.35122 +/-    12.923
Long of Asc Node:      271.36222 +/-     0.330
Inclination:             7.07347 +/-     0.146
Eccentricity:         0.12116604 +/-    0.0872
Semi-Major Axis:     43.97827528 +/-    0.5194
Time of Perihelion: 2482665.7535 +/-    1204.3
Perihelion:          38.64960190 +/-    3.8622
Aphelion:            49.30694866 +/-    3.8791
Period (y)              291.6524 +/-      5.17
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           12.55773512 +/-    0.0500
Ecliptic Y          -41.82350438 +/-    0.1578
Ecliptic Z            1.43442875 +/-    0.0055
Ecliptic XDOT         0.00237099 +/-    0.0001
Ecliptic YDOT         0.00105211 +/-    0.0002
Ecliptic ZDOT         0.00029723 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.69164470 +/-    0.1517
Geocenter to KBO     42.91395794 +/-    0.1656
# Hcoef:  9.71

The following table shows the complete astrometric record for 20KL54. 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 (20KL54) followed by the observatory code and reference code for the source of the astrometry.

2020 05  28.44674  19 15 06.549  -20 23 09.09  26.0r 20KL54    266  C~6c5Z      
2020 05  28.50129  19 15 06.353  -20 23 09.27  26.0r 20KL54    266  C~6c5Z      
2020 05  28.55756  19 15 06.151  -20 23 09.45  26.0r 20KL54    266  C~6c5Z      
2020 05  30.43935  19 14 59.432  -20 23 15.49  26.1r 20KL54    266  C~6c5Z      
2020 05  30.53044  19 14 59.093  -20 23 15.81  26.1r 20KL54    266  C~6c5Z      
2020 05  30.61862  19 14 58.764  -20 23 16.10  26.1r 20KL54    266  C~6c5Z      
2020 06  01.43269  19 14 52.060  -20 23 22.61  26.4r 20KL54    266  C~6c5Z      
2020 06  01.47325  19 14 51.905  -20 23 22.77  26.4r 20KL54    266  C~6c5Z      
2020 06  01.60571  19 14 51.396  -20 23 23.26  26.4r 20KL54    266  C~6c5Z      
2020 06  20.45583  19 13 31.505  -20 24 54.54  25.9r 20KL54    266  C~6c5Z      
2020 06  20.52860  19 13 31.162  -20 24 54.96  25.9r 20KL54    266  C~6c5Z      
2020 06  20.62233  19 13 30.721  -20 24 55.49  25.9r 20KL54    266  C~6c5Z      
2020 06  22.44948  19 13 22.219  -20 25 06.40  26.0r 20KL54    266  C~6c5Z      
2020 06  22.52092  19 13 21.878  -20 25 06.83  26.0r 20KL54    266  C~6c5Z      
2020 06  22.59118  19 13 21.543  -20 25 07.25  26.0r 20KL54    266  C~6c5Z      
2020 08  13.24332  19 09 21.811  -20 31 06.78  25.9r 20KL54    266  C~6c5Z      
2020 08  13.33331  19 09 21.457  -20 31 07.38  25.9r 20KL54    266  C~6c5Z      
2020 08  13.42301  19 09 21.104  -20 31 07.96  25.9r 20KL54    266  C~6c5Z      

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    -0.01       0.00     0.00
     2   0.0001     -2.76    -0.01       0.17     0.00
     3   0.0003     -5.60    -0.01       0.36    -0.00
     4   0.0055   -100.06     0.04       6.46     0.04
     5   0.0057   -104.83     0.03       6.76     0.05
     6   0.0059   -109.46     0.03       7.06     0.05
     7   0.0109   -203.78    -0.03      12.65    -0.05
     8   0.0110   -205.96    -0.03      12.77    -0.05
     9   0.0114   -213.12    -0.02      13.20    -0.06
    10   0.0630  -1338.84     0.02      65.00    -0.00
    11   0.0632  -1343.67     0.02      65.19     0.00
    12   0.0635  -1349.89     0.02      65.44     0.00
    13   0.0685  -1469.84    -0.02      69.63     0.01
    14   0.0686  -1474.65    -0.02      69.80     0.01
    15   0.0688  -1479.37    -0.02      69.98     0.00
    16   0.2103  -4867.86    -0.00     125.69    -0.00
    17   0.2105  -4872.87     0.00     125.69     0.00
    18   0.2107  -4877.87    -0.00     125.71     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.

20KL54    quality flag:1

Type:       SCATNEAR CLASSICAL  CENTAURS

axisobj        43.481    48.978    41.806
ecceobj         0.125     0.155     0.209
incobj          7.117     6.669     7.425
qmin           37.642    40.812    29.232
qmax           50.307    58.166    64.098
amean          43.725    49.281    42.787
amin           43.280    48.855    40.024
amax           44.214    49.764    47.375
emean           0.122     0.158     0.257
emin            0.102     0.147     0.186
emax            0.138     0.169     0.353
imean           8.990     8.257    13.835
imin            8.167     7.905     8.930
imax            9.777     8.511    18.119
excite_mean     0.199     0.214     0.352
fracstop        1.000     1.000     1.000
cjmean          3.051     3.111     2.939

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       184.0     171.0     183.4
kozaiamp        180.0     179.9     180.0