Orbit Fit and Astrometric record for 20KV53

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: 20KV53    
# Created Tue Apr  1 01:11:19 2025
# Orbit generated from Bernstein formalism
# Fitting     21 observations of     21
# Arc:  79.98d
# First observation: 2020/05/26
#  Last observation: 2020/08/14
Preliminary a, adot, b, bdot, g, gdot:
   0.000005   0.016645   0.000002  -0.001340   0.021915   0.000000
# Chi-squared of fit:     3.23 DOF:     36 RMS:  0.07
# Min/Max residuals:    -0.14    0.17
# Exact a, adot, b, bdot, g, gdot:
  1.518422E-05  2.116659E-02 -1.732690E-06 -1.343121E-03  2.265794E-02 -1.772814E-03
# Covariance matrix:
  2.1014E-13 -9.3740E-12  4.7300E-15 -2.0550E-14 -9.5563E-13  1.2438E-10
 -9.3740E-12  1.0402E-07 -6.9841E-11 -2.3971E-10  1.9588E-08  3.6643E-07
  4.7300E-15 -6.9841E-11  1.8495E-13 -6.3484E-13 -1.3163E-11 -2.4829E-10
 -2.0550E-14 -2.3971E-10 -6.3484E-13  9.8451E-12 -4.5516E-11 -9.3181E-10
 -9.5563E-13  1.9588E-08 -1.3163E-11 -4.5516E-11  3.6951E-09  7.0439E-08
  1.2438E-10  3.6643E-07 -2.4829E-10 -9.3181E-10  7.0439E-08  1.6257E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.533070  -73.127023    0.674199    0.033045   -0.749851  2458995.943811
# Heliocentric elements and errors
Epoch:              2458990.5000  =  2020/05/21
Mean Anomaly:          281.65147 +/-     7.096
Argument of Peri:      234.87235 +/-    14.513
Long of Asc Node:      140.68818 +/-     0.437
Inclination:             4.37126 +/-     0.049
Eccentricity:         0.09874841 +/-    0.0589
Semi-Major Axis:     45.36931775 +/-    0.5424
Time of Perihelion: 2483282.8852 +/-    2156.6
Perihelion:          40.88916990 +/-    2.7185
Aphelion:            49.84946560 +/-    2.7398
Period (y)              305.5988 +/-      5.48
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           12.37593034 +/-    0.0343
Ecliptic Y          -43.11421250 +/-    0.1132
Ecliptic Z            1.95056936 +/-    0.0052
Ecliptic XDOT         0.00239563 +/-    0.0001
Ecliptic YDOT         0.00094380 +/-    0.0001
Ecliptic ZDOT        -0.00017184 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.89770253 +/-    0.1091
Geocenter to KBO     44.13464595 +/-    0.1184
# Hcoef:  9.24

The following table shows the complete astrometric record for 20KV53. 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 (20KV53) followed by the observatory code and reference code for the source of the astrometry.

2020 05  26.44301  19 11 49.700  -19 51 37.99  24.5r 20KV53    266  C~6c5Y      
2020 05  26.50149  19 11 49.502  -19 51 38.24  24.5r 20KV53    266  C~6c5Y      
2020 05  26.55599  19 11 49.316  -19 51 38.47  24.5r 20KV53    266  C~6c5Y      
2020 05  29.44698  19 11 39.472  -19 51 51.51  26.1r 20KV53    266  C~6c5Y      
2020 05  29.53371  19 11 39.162  -19 51 51.92  26.1r 20KV53    266  C~6c5Y      
2020 05  29.61905  19 11 38.855  -19 51 52.31  26.1r 20KV53    266  C~6c5Y      
2020 05  31.44139  19 11 32.375  -19 52 00.88  25.9r 20KV53    266  C~6c5Y      
2020 05  31.52961  19 11 32.048  -19 52 01.33  25.9r 20KV53    266  C~6c5Y      
2020 05  31.61814  19 11 31.720  -19 52 01.76  25.9r 20KV53    266  C~6c5Y      
2020 06  21.45390  19 10 05.742  -19 54 12.74  26.0r 20KV53    266  C~6c5Y      
2020 06  21.53376  19 10 05.374  -19 54 13.33  26.0r 20KV53    266  C~6c5Y      
2020 06  21.61261  19 10 05.012  -19 54 13.90  26.0r 20KV53    266  C~6c5Y      
2020 06  24.43648  19 09 52.139  -19 54 35.33  25.8r 20KV53    266  C~6c5Y      
2020 06  24.52318  19 09 51.733  -19 54 36.00  25.8r 20KV53    266  C~6c5Y      
2020 06  24.61708  19 09 51.295  -19 54 36.70  25.8r 20KV53    266  C~6c5Y      
2020 08  12.26680  19 06 13.102  -20 01 45.43  26.0r 20KV53    266  C~6c5Y      
2020 08  12.34843  19 06 12.790  -20 01 46.15  26.0r 20KV53    266  C~6c5Y      
2020 08  12.42950  19 06 12.481  -20 01 46.85  26.0r 20KV53    266  C~6c5Y      
2020 08  14.24286  19 06 05.825  -20 02 02.67  25.6r 20KV53    266  C~6c5Y      
2020 08  14.33285  19 06 05.492  -20 02 03.46  25.6r 20KV53    266  C~6c5Y      
2020 08  14.42134  19 06 05.165  -20 02 04.21  25.6r 20KV53    266  C~6c5Y      

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    -0.09       0.00     0.16
     2   0.0002     -2.80    -0.08       0.09     0.17
     3   0.0003     -5.44    -0.09       0.19     0.17
     4   0.0082   -144.86     0.03       4.28    -0.14
     5   0.0085   -149.25     0.04       4.41    -0.14
     6   0.0087   -153.60     0.03       4.55    -0.14
     7   0.0137   -245.38     0.08       7.23     0.01
     8   0.0139   -250.01     0.07       7.35     0.01
     9   0.0142   -254.65     0.07       7.49     0.00
    10   0.0712  -1474.39    -0.02      24.54    -0.07
    11   0.0714  -1479.61    -0.02      24.58    -0.07
    12   0.0716  -1484.75    -0.02      24.63    -0.07
    13   0.0794  -1667.58    -0.00      25.14     0.01
    14   0.0796  -1673.34    -0.00      25.16     0.01
    15   0.0799  -1679.56     0.00      25.21     0.01
    16   0.2131  -4785.53    -0.00     -40.18     0.01
    17   0.2133  -4789.98    -0.01     -40.39     0.02
    18   0.2135  -4794.39    -0.01     -40.59     0.02
    19   0.2185  -4889.43     0.00     -45.58     0.01
    20   0.2187  -4894.19     0.01     -45.83     0.01
    21   0.2190  -4898.85     0.01     -46.05     0.01

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.

20KV53    quality flag:1

Type:      CLASSICAL CLASSICAL  SCATNEAR

axisobj        44.836    48.389    43.125
ecceobj         0.102     0.097     0.171
incobj          4.375     4.230     4.495
qmin           39.605    43.175    32.917
qmax           50.781    54.478    61.377
amean          45.034    48.673    44.572
amin           44.665    48.266    42.295
amax           45.441    49.120    47.580
emean           0.104     0.098     0.227
emin            0.090     0.087     0.162
emax            0.118     0.109     0.292
imean           3.632     3.215     3.482
imin            3.010     2.983     0.537
imax            4.282     3.471     7.712
excite_mean     0.122     0.113     0.236
fracstop        1.000     1.000     1.000
cjmean          3.096     3.145     3.039

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       177.1     184.1     180.4
kozaiamp        180.0     179.9     180.0