Orbit Fit and Astrometric record for 20KK54

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: 20KK54    
# Created Tue Apr  1 01:11:19 2025
# Orbit generated from Bernstein formalism
# Fitting     23 observations of     23
# Arc: 154.82d
# First observation: 2020/05/29
#  Last observation: 2020/10/31
Preliminary a, adot, b, bdot, g, gdot:
  -0.000015   0.020672  -0.000013  -0.001509   0.021160   0.000000
# Chi-squared of fit:     2.29 DOF:     40 RMS:  0.06
# Min/Max residuals:    -0.12    0.16
# Exact a, adot, b, bdot, g, gdot:
  1.307417E-05  1.697532E-02 -1.150750E-06 -1.668024E-03  2.051468E-02 -9.872086E-04
# Covariance matrix:
  2.6010E-13 -4.6589E-12  1.6798E-14 -2.8047E-13  8.1249E-14  1.8285E-10
 -4.6589E-12  3.3579E-10 -1.2317E-12  1.9087E-11  1.7546E-11 -1.0888E-08
  1.6798E-14 -1.2317E-12  1.3878E-13 -5.0479E-13 -5.9945E-14  4.0986E-11
 -2.8047E-13  1.9087E-11 -5.0479E-13  3.8055E-12  8.4420E-13 -6.4761E-10
  8.1249E-14  1.7546E-11 -5.9945E-14  8.4420E-13  2.2010E-12 -3.8552E-10
  1.8285E-10 -1.0888E-08  4.0986E-11 -6.4761E-10 -3.8552E-10  3.8356E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.195766  -74.259734    0.619899    0.030377   -0.795609  2458998.947781
# Heliocentric elements and errors
Epoch:              2458990.5000  =  2020/05/21
Mean Anomaly:          213.65106 +/-    11.855
Argument of Peri:      312.89162 +/-    11.742
Long of Asc Node:      126.14081 +/-     0.028
Inclination:             5.97735 +/-     0.007
Eccentricity:         0.14108591 +/-    0.0130
Semi-Major Axis:     44.14222186 +/-    0.2105
Time of Perihelion: 2502538.3571 +/-    3513.9
Perihelion:          37.91437628 +/-    0.6015
Aphelion:            50.37006744 +/-    0.6219
Period (y)              293.2848 +/-      2.10
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           12.83881753 +/-    0.0010
Ecliptic Y          -47.82459427 +/-    0.0034
Ecliptic Z            1.86765131 +/-    0.0001
Ecliptic XDOT         0.00215526 +/-    0.0000
Ecliptic YDOT         0.00073663 +/-    0.0001
Ecliptic ZDOT        -0.00022773 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   49.55315504 +/-    0.0033
Geocenter to KBO     48.74557924 +/-    0.0035
# Hcoef:  9.16

The following table shows the complete astrometric record for 20KK54. 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 (20KK54) followed by the observatory code and reference code for the source of the astrometry.

2020 05  29.44698  19 07 12.776  -20 19 48.19  26.1r 20KK54    266  C~6c5Z      
2020 05  29.53371  19 07 12.482  -20 19 48.60  26.1r 20KK54    266  C~6c5Z      
2020 05  29.61905  19 07 12.192  -20 19 48.99  26.1r 20KK54    266  C~6c5Z      
2020 05  31.44139  19 07 06.046  -20 19 57.68  26.2r 20KK54    266  C~6c5Z      
2020 05  31.52961  19 07 05.738  -20 19 58.12  26.2r 20KK54    266  C~6c5Z      
2020 05  31.61814  19 07 05.427  -20 19 58.55  26.2r 20KK54    266  C~6c5Z      
2020 06  21.45390  19 05 44.769  -20 22 03.30  25.9r 20KK54    266  C~6c5Z      
2020 06  21.53376  19 05 44.426  -20 22 03.85  25.9r 20KK54    266  C~6c5Z      
2020 06  21.61261  19 05 44.088  -20 22 04.38  25.9r 20KK54    266  C~6c5Z      
2020 06  24.43648  19 05 32.102  -20 22 24.47  26.0r 20KK54    266  C~6c5Z      
2020 06  24.52739  19 05 31.707  -20 22 25.12  26.0r 20KK54    266  C~6c5Z      
2020 06  24.61708  19 05 31.317  -20 22 25.74  26.0r 20KK54    266  C~6c5Z      
2020 08  12.26680  19 02 09.967  -20 28 49.92  26.0r 20KK54    266  C~6c5Z      
2020 08  12.34843  19 02 09.681  -20 28 50.56  26.0r 20KK54    266  C~6c5Z      
2020 08  12.42950  19 02 09.398  -20 28 51.17  26.0r 20KK54    266  C~6c5Z      
2020 08  14.24286  19 02 03.293  -20 29 05.08  26.0r 20KK54    266  C~6c5Z      
2020 08  14.33285  19 02 02.987  -20 29 05.78  26.0r 20KK54    266  C~6c5Z      
2020 08  14.42134  19 02 02.687  -20 29 06.44  26.0r 20KK54    266  C~6c5Z      
2020 10  31.236861 19 01 29.437  -20 34 16.92        20KK54    250  S~7Bjx      
2020 10  31.243180 19 01 29.448  -20 34 16.92        20KK54    250  S~7Bjx      
2020 10  31.249500 19 01 29.458  -20 34 16.88        20KK54    250  S~7Bjx      
2020 10  31.255819 19 01 29.471  -20 34 16.79        20KK54    250  S~7Bjx      
2020 10  31.262139 19 01 29.486  -20 34 16.71        20KK54    250  S~7Bjx      

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     0.00       0.00    -0.03
     2   0.0002     -4.15     0.01       0.07    -0.02
     3   0.0005     -8.25     0.01       0.15    -0.02
     4   0.0055    -95.12    -0.02       1.46     0.01
     5   0.0057    -99.48    -0.01       1.52     0.01
     6   0.0059   -103.87    -0.02       1.59     0.00
     7   0.0630  -1245.07     0.01       6.83     0.11
     8   0.0632  -1249.92     0.00       6.83     0.11
     9   0.0634  -1254.71    -0.00       6.84     0.11
    10   0.0712  -1424.45     0.00       5.88    -0.06
    11   0.0714  -1430.04     0.01       5.85    -0.07
    12   0.0716  -1435.56     0.00       5.86    -0.06
    13   0.2048  -4291.56     0.01     -64.70    -0.00
    14   0.2051  -4295.63     0.00     -64.90    -0.01
    15   0.2053  -4299.65     0.01     -65.08    -0.01
    16   0.2103  -4386.47    -0.00     -69.70    -0.02
    17   0.2105  -4390.82    -0.01     -69.94    -0.03
    18   0.2107  -4395.09    -0.01     -70.14    -0.03
    19   0.4238  -4892.92     0.16    -329.02    -0.08
    20   0.4238  -4892.77     0.07    -329.03    -0.07
    21   0.4238  -4892.62    -0.03    -329.01    -0.03
    22   0.4238  -4892.43    -0.09    -328.94     0.07
    23   0.4239  -4892.21    -0.12    -328.88     0.14

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.

20KK54    quality flag:2

Type:       SCATNEAR  SCATNEAR    7:4EEE

axisobj        43.691    44.529    43.458
ecceobj         0.152     0.203     0.136
incobj          5.991     5.975     6.007
qmin           34.444    32.198    37.152
qmax           53.757    61.918    50.827
amean          43.892    44.942    43.726
amin           43.455    44.279    43.286
amax           44.379    47.521    44.230
emean           0.181     0.228     0.137
emin            0.141     0.192     0.123
emax            0.213     0.310     0.149
imean           6.426     6.287     4.920
imin            3.765     3.314     3.915
imax            8.798     8.800     5.893
excite_mean     0.214     0.254     0.162
fracstop        1.000     1.000     1.000
cjmean          3.043     3.032     3.067

libcent 0      -180.0    -180.0     177.8
libamp  0      -180.0    -180.0     151.6
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     179.3     176.3
kozaiamp        180.0     180.0     180.0