Orbit Fit and Astrometric record for 20KK55

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: 20KK55    
# Created Tue Apr  1 01:11:20 2025
# Orbit generated from Bernstein formalism
# Fitting     18 observations of     18
# Arc:  76.97d
# First observation: 2020/05/29
#  Last observation: 2020/08/14
Preliminary a, adot, b, bdot, g, gdot:
   0.000001   0.031704   0.000005   0.002167   0.028540   0.000000
# Chi-squared of fit:     0.31 DOF:     30 RMS:  0.02
# Min/Max residuals:    -0.04    0.04
# Exact a, adot, b, bdot, g, gdot:
  2.099980E-05  3.993496E-02  1.166084E-06  2.165694E-03  2.992198E-02 -2.771801E-03
# Covariance matrix:
  2.7730E-13  3.4120E-11 -2.5269E-14  1.3595E-13  7.3236E-12  2.4973E-10
  3.4120E-11  1.7425E-07 -1.0784E-10  2.4851E-10  3.2200E-08  4.2555E-07
 -2.5269E-14 -1.0784E-10  2.4246E-13 -1.1812E-12 -1.9959E-11 -2.6946E-10
  1.3595E-13  2.4851E-10 -1.1812E-12  1.1542E-11  4.6677E-11  7.5559E-10
  7.3236E-12  3.2200E-08 -1.9959E-11  4.6677E-11  5.9580E-09  8.0079E-08
  2.4973E-10  4.2555E-07 -2.6946E-10  7.5559E-10  8.0079E-08  1.3232E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.216066  -73.273639    0.633510    0.030242   -0.784820  2458998.947781
# Heliocentric elements and errors
Epoch:              2458990.5000  =  2020/05/21
Mean Anomaly:          356.81448 +/-     1.101
Argument of Peri:       48.55480 +/-     4.532
Long of Asc Node:      251.07737 +/-     0.273
Inclination:             3.80862 +/-     0.026
Eccentricity:         0.56811804 +/-    0.0128
Semi-Major Axis:     78.39156596 +/-    2.5473
Time of Perihelion: 2461233.7638 +/-     767.7
Perihelion:          33.85590325 +/-    1.4886
Aphelion:           122.92722868 +/-    4.1184
Period (y)              694.0843 +/-     33.83
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            9.23622764 +/-    0.0248
Ecliptic Y          -32.92363606 +/-    0.0825
Ecliptic Z            1.29240374 +/-    0.0033
Ecliptic XDOT         0.00343241 +/-    0.0001
Ecliptic YDOT         0.00130523 +/-    0.0001
Ecliptic ZDOT         0.00018797 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.21905931 +/-    0.0797
Geocenter to KBO     33.42025215 +/-    0.0862
# Hcoef: 11.27

The following table shows the complete astrometric record for 20KK55. 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 (20KK55) followed by the observatory code and reference code for the source of the astrometry.

2020 05  29.44698  19 11 22.470  -20 11 35.16  26.3r 20KK55    266  C~6c5b      
2020 05  29.53371  19 11 22.099  -20 11 35.47  26.3r 20KK55    266  C~6c5b      
2020 05  29.61905  19 11 21.732  -20 11 35.76  26.3r 20KK55    266  C~6c5b      
2020 05  31.44139  19 11 13.980  -20 11 42.36  26.8r 20KK55    266  C~6c5b      
2020 05  31.52961  19 11 13.589  -20 11 42.71  26.8r 20KK55    266  C~6c5b      
2020 05  31.61814  19 11 13.195  -20 11 43.04  26.8r 20KK55    266  C~6c5b      
2020 06  21.45390  19 09 28.865  -20 13 37.12  26.6r 20KK55    266  C~6c5b      
2020 06  21.53376  19 09 28.414  -20 13 37.67  26.6r 20KK55    266  C~6c5b      
2020 06  21.61261  19 09 27.970  -20 13 38.19  26.6r 20KK55    266  C~6c5b      
2020 06  24.43648  19 09 12.206  -20 13 58.34  26.4r 20KK55    266  C~6c5b      
2020 06  24.52599  19 09 11.692  -20 13 58.98  26.4r 20KK55    266  C~6c5b      
2020 06  24.61708  19 09 11.170  -20 13 59.62  26.4r 20KK55    266  C~6c5b      
2020 08  12.26680  19 04 45.018  -20 20 48.21  26.7r 20KK55    266  C~6c5b      
2020 08  12.34843  19 04 44.645  -20 20 48.88  26.7r 20KK55    266  C~6c5b      
2020 08  12.42950  19 04 44.276  -20 20 49.52  26.7r 20KK55    266  C~6c5b      
2020 08  14.24286  19 04 36.349  -20 21 04.15  26.5r 20KK55    266  C~6c5b      
2020 08  14.33285  19 04 35.951  -20 21 04.88  26.5r 20KK55    266  C~6c5b      
2020 08  14.42134  19 04 35.561  -20 21 05.57  26.5r 20KK55    266  C~6c5b      

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     0.02       0.00    -0.00
     2   0.0002     -5.22     0.03       0.33    -0.00
     3   0.0005    -10.39     0.02       0.67    -0.01
     4   0.0055   -119.51    -0.03       7.42    -0.00
     5   0.0057   -125.01    -0.03       7.74    -0.00
     6   0.0059   -130.56    -0.03       8.09    -0.00
     7   0.0630  -1602.23     0.03      71.73     0.04
     8   0.0632  -1608.60     0.03      71.94     0.04
     9   0.0634  -1614.87     0.03      72.17     0.04
    10   0.0712  -1837.58    -0.02      78.55    -0.04
    11   0.0714  -1844.84    -0.02      78.77    -0.03
    12   0.0716  -1852.21    -0.03      79.01    -0.04
    13   0.2048  -5620.23     0.01     105.18     0.01
    14   0.2051  -5625.53     0.01     105.11     0.01
    15   0.2053  -5630.76     0.01     105.05     0.01
    16   0.2103  -5743.26    -0.00     102.99    -0.01
    17   0.2105  -5748.91    -0.01     102.89    -0.01
    18   0.2107  -5754.44    -0.01     102.82    -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.

20KK55    quality flag:1

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        76.093    96.791    65.303
ecceobj         0.556     0.653     0.490
incobj          3.828     3.738     3.927
qmin           32.925    32.783    32.732
qmax          144.129   173.313   122.577
amean          80.916    94.650    71.415
amin           74.291    87.988    63.736
amax           89.050   103.600    78.059
emean           0.581     0.644     0.529
emin            0.542     0.614     0.474
emax            0.620     0.673     0.570
imean           5.401     4.960     5.955
imin            4.479     4.306     4.889
imax            6.303     6.169     6.969
excite_mean     0.589     0.649     0.539
fracstop        1.000     1.000     1.000
cjmean          3.026     3.021     3.019

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       178.3     182.7     182.4
kozaiamp        180.0     179.9     180.0