Orbit Fit and Astrometric record for 20KT53

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: 20KT53    
# Created Tue Apr  1 01:11:19 2025
# Orbit generated from Bernstein formalism
# Fitting     15 observations of     15
# Arc:  74.98d
# First observation: 2020/05/31
#  Last observation: 2020/08/14
Preliminary a, adot, b, bdot, g, gdot:
  -0.000003   0.014618   0.000005  -0.001534   0.021360   0.000000
# Chi-squared of fit:     0.21 DOF:     24 RMS:  0.02
# Min/Max residuals:    -0.04    0.04
# Exact a, adot, b, bdot, g, gdot:
  1.435137E-05  2.022094E-02 -1.063595E-06 -1.520810E-03  2.232474E-02  1.660975E-03
# Covariance matrix:
  5.7264E-13  1.3377E-10 -1.1848E-13  6.9031E-14  2.6474E-11  7.7712E-10
  1.3377E-10  2.1765E-07 -1.8692E-10  2.8259E-10  4.0031E-08  6.4211E-07
 -1.1848E-13 -1.8692E-10  4.1795E-13 -1.7646E-12 -3.4397E-11 -5.5522E-10
  6.9031E-14  2.8259E-10 -1.7646E-12  1.4934E-11  5.1244E-11  6.5937E-10
  2.6474E-11  4.0031E-08 -3.4397E-11  5.1244E-11  7.3739E-09  1.2070E-07
  7.7712E-10  6.4211E-07 -5.5522E-10  6.5937E-10  1.2070E-07  2.5124E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.589802  -73.056088    0.609937    0.036198   -0.803127  2459000.942191
# Heliocentric elements and errors
Epoch:              2459000.5000  =  2020/05/31
Mean Anomaly:          112.58812 +/-    53.652
Argument of Peri:       28.76118 +/-    49.217
Long of Asc Node:      137.03568 +/-     0.635
Inclination:             4.95036 +/-     0.092
Eccentricity:         0.07565652 +/-    0.0503
Semi-Major Axis:     44.12084595 +/-    1.7010
Time of Perihelion: 2425522.9064 +/-   15835.3
Perihelion:          40.78281648 +/-    2.7209
Aphelion:            47.45887542 +/-    2.8773
Period (y)              293.0717 +/-     16.95
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           12.69753218 +/-    0.0502
Ecliptic Y          -43.75876732 +/-    0.1647
Ecliptic Z            2.02401870 +/-    0.0078
Ecliptic XDOT         0.00244207 +/-    0.0001
Ecliptic YDOT         0.00052357 +/-    0.0002
Ecliptic ZDOT        -0.00017735 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.60870194 +/-    0.1586
Geocenter to KBO     44.79334833 +/-    0.1723
# Hcoef:  8.84

The following table shows the complete astrometric record for 20KT53. 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 (20KT53) followed by the observatory code and reference code for the source of the astrometry.

2020 05  31.44139  19 12 05.862  -19 47 43.93  25.4r 20KT53    266  C~6c5Y      
2020 05  31.52961  19 12 05.540  -19 47 44.38  25.4r 20KT53    266  C~6c5Y      
2020 05  31.61814  19 12 05.216  -19 47 44.81  25.4r 20KT53    266  C~6c5Y      
2020 06  21.45390  19 10 40.296  -19 49 56.88  25.3r 20KT53    266  C~6c5Y      
2020 06  21.53376  19 10 39.932  -19 49 57.48  25.3r 20KT53    266  C~6c5Y      
2020 06  21.61261  19 10 39.574  -19 49 58.06  25.3r 20KT53    266  C~6c5Y      
2020 06  24.43648  19 10 26.857  -19 50 19.74  25.3r 20KT53    266  C~6c5Y      
2020 06  24.51899  19 10 26.475  -19 50 20.39  25.3r 20KT53    266  C~6c5Y      
2020 06  24.61428  19 10 26.036  -19 50 21.11  25.3r 20KT53    266  C~6c5Y      
2020 08  12.26680  19 06 50.326  -19 57 33.66  25.5r 20KT53    266  C~6c5Y      
2020 08  12.34843  19 06 50.018  -19 57 34.39  25.5r 20KT53    266  C~6c5Y      
2020 08  12.42950  19 06 49.712  -19 57 35.09  25.5r 20KT53    266  C~6c5Y      
2020 08  14.24286  19 06 43.114  -19 57 51.02  25.3r 20KT53    266  C~6c5Y      
2020 08  14.33285  19 06 42.784  -19 57 51.82  25.3r 20KT53    266  C~6c5Y      
2020 08  14.42134  19 06 42.459  -19 57 52.59  25.3r 20KT53    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    -0.01       0.00    -0.00
     2   0.0002     -4.57    -0.00       0.11    -0.00
     3   0.0005     -9.16     0.00       0.25     0.00
     4   0.0575  -1214.72     0.03      15.56     0.01
     5   0.0577  -1219.89     0.02      15.58     0.01
     6   0.0580  -1224.97     0.02      15.62     0.00
     7   0.0657  -1405.72    -0.02      15.80     0.00
     8   0.0659  -1411.15    -0.03      15.80    -0.01
     9   0.0662  -1417.39    -0.02      15.84    -0.00
    10   0.1994  -4490.32     0.00     -54.33    -0.04
    11   0.1996  -4494.72     0.01     -54.56    -0.04
    12   0.1998  -4499.09     0.01     -54.75    -0.04
    13   0.2048  -4593.37    -0.01     -59.85     0.04
    14   0.2050  -4598.09    -0.00     -60.11     0.04
    15   0.2053  -4602.73    -0.01     -60.34     0.04

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.

20KT53    quality flag:1

Type:      CLASSICAL  SCATNEAR  SCATNEAR

axisobj        43.590    52.228    39.789
ecceobj         0.079     0.265     0.195
incobj          4.957     4.687     5.276
qmin           39.318    37.875    31.138
qmax           48.581    68.073    63.301
amean          43.833    52.616    42.743
amin           43.486    52.099    36.537
amax           44.201    53.258    47.812
emean           0.080     0.267     0.241
emin            0.062     0.255     0.112
emax            0.099     0.279     0.324
imean           3.985     3.562     2.578
imin            3.191     3.148     0.525
imax            4.831     3.997     5.240
excite_mean     0.106     0.274     0.246
fracstop        1.000     1.000     1.000
cjmean          3.086     3.115     3.013

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       177.2     185.3     174.8
kozaiamp        179.9     180.0     180.0