Orbit Fit and Astrometric record for 20KO11

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: 20KO11    
# Created Mon Dec  6 02:14:05 2021
# Orbit generated from Bernstein formalism
# Fitting     10 observations of     10
# Arc:  76.80d
# First observation: 2020/05/29
#  Last observation: 2020/08/14
Preliminary a, adot, b, bdot, g, gdot:
   0.000000   0.011349   0.000004  -0.001860   0.019554   0.000000
# Chi-squared of fit:     0.71 DOF:     14 RMS:  0.05
# Min/Max residuals:    -0.10    0.09
# Exact a, adot, b, bdot, g, gdot:
  1.307614E-05  1.683546E-02 -1.428293E-06 -1.857784E-03  2.048937E-02 -3.192646E-03
# Covariance matrix:
  4.7250E-13  1.3807E-10 -9.4517E-14 -2.4199E-13  2.6760E-11  6.7409E-10
  1.3807E-10  2.7074E-07 -1.8172E-10 -2.3507E-10  4.9528E-08  6.9633E-07
 -9.4517E-14 -1.8172E-10  3.8997E-13 -1.6021E-12 -3.3252E-11 -4.6898E-10
 -2.4199E-13 -2.3507E-10 -1.6021E-12  2.5798E-11 -4.4080E-11 -8.9122E-10
  2.6760E-11  4.9528E-08 -3.3252E-11 -4.4080E-11  9.0716E-09  1.3020E-07
  6.7409E-10  6.9633E-07 -4.6898E-10 -8.9122E-10  1.3020E-07  2.5384E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.757428  -74.276806    0.617715    0.038258   -0.796952  2458999.090801
# Heliocentric elements and errors
Epoch:              2458990.5000  =  2020/05/21
Mean Anomaly:          253.29040 +/-     8.683
Argument of Peri:      285.22108 +/-     7.040
Long of Asc Node:      128.32527 +/-     0.671
Inclination:             6.82673 +/-     0.185
Eccentricity:         0.22178354 +/-    0.0842
Semi-Major Axis:     44.94835022 +/-    0.8004
Time of Perihelion: 2491616.9688 +/-    2507.6
Perihelion:          34.97954595 +/-    3.8377
Aphelion:            54.91715449 +/-    3.9111
Period (y)              301.3553 +/-      8.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           12.83783473 +/-    0.0614
Ecliptic Y          -47.86746739 +/-    0.2181
Ecliptic Z            2.34792941 +/-    0.0109
Ecliptic XDOT         0.00206131 +/-    0.0001
Ecliptic YDOT         0.00101185 +/-    0.0002
Ecliptic ZDOT        -0.00026871 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   49.61468741 +/-    0.2111
Geocenter to KBO     48.80579935 +/-    0.2269
# Hcoef:  9.16

The following table shows the complete astrometric record for 20KO11. 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 (20KO11) followed by the observatory code and reference code for the source of the astrometry.

2020 05  29.590    19 06 51.972  -19 46 26.63  25.1R 20KO11    266  C~49En      
2020 05  29.601    19 06 51.934  -19 46 26.68  25.1R 20KO11    266  C~49En      
2020 05  31.488    19 06 45.583  -19 46 35.10  25.2R 20KO11    266  C~49En      
2020 05  31.530    19 06 45.441  -19 46 35.28  25.2R 20KO11    266  C~49En      
2020 06  21.461    19 05 24.660  -19 48 35.99  25.5R 20KO11    266  C~49En      
2020 06  21.548    19 05 24.288  -19 48 36.58  25.5R 20KO11    266  C~49En      
2020 06  24.501    19 05 11.796  -19 48 57.15  25.3R 20KO11    266  C~49En      
2020 06  24.511    19 05 11.753  -19 48 57.22  25.3R 20KO11    266  C~49En      
2020 08  14.297    19 01 43.820  -19 55 49.38  27.8R 20KO11    266  C~49En      
2020 08  14.387    19 01 43.516  -19 55 50.11  27.8R 20KO11    266  C~49En      

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   0.0000     -0.54    -0.03       0.01    -0.00
     3   0.0052    -90.56    -0.00       1.91    -0.02
     4   0.0053    -92.57     0.07       1.96    -0.01
     5   0.0626  -1239.05    -0.10      11.32     0.03
     6   0.0629  -1244.33    -0.10      11.32     0.03
     7   0.0709  -1421.82     0.09      10.67    -0.00
     8   0.0710  -1422.43     0.09      10.67    -0.00
     9   0.2100  -4383.81    -0.00     -77.71    -0.01
    10   0.2103  -4388.16     0.00     -77.97    -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.

20KO11    quality flag:1

Type:       SCATNEAR CLASSICAL  CENTAURR

axisobj        44.512    48.716    42.146
ecceobj         0.230     0.008     0.279
incobj          6.843     6.312     7.168
qmin           34.075    47.703    29.847
qmax           55.779    50.430    54.017
amean          44.449    48.974    40.469
amin           44.007    48.581    37.673
amax           45.177    49.366    42.400
emean           0.173     0.011     0.245
emin            0.131     0.001     0.182
emax            0.235     0.022     0.279
imean           3.047     4.962     4.937
imin            1.638     4.770     3.760
imax            5.700     5.173     6.790
excite_mean     0.181     0.087     0.260
fracstop        1.000     1.000     0.048
cjmean          3.066     3.156     2.982

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       176.0     182.4     184.3
kozaiamp        180.0     180.0     179.6