Orbit Fit and Astrometric record for 20KT11

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: 20KT11    
# Created Sat Nov 27 02:14:13 2021
# Orbit generated from Bernstein formalism
# Fitting     12 observations of     12
# Arc:  79.89d
# First observation: 2020/05/26
#  Last observation: 2020/08/14
Preliminary a, adot, b, bdot, g, gdot:
   0.000004   0.009821   0.000002   0.007188   0.019127   0.000000
# Chi-squared of fit:     0.94 DOF:     18 RMS:  0.05
# Min/Max residuals:    -0.10    0.08
# Exact a, adot, b, bdot, g, gdot:
  1.142784E-05  1.382589E-02  5.536475E-06  7.171001E-03  1.979309E-02 -1.065667E-03
# Covariance matrix:
  3.1475E-13 -4.6438E-12 -6.7231E-15  4.4206E-13  4.4482E-13  2.6782E-10
 -4.6438E-12  1.9080E-07 -9.8105E-11  7.6531E-10  3.5516E-08  6.2610E-07
 -6.7231E-15 -9.8105E-11  2.8203E-13 -1.6726E-12 -1.8372E-11 -3.5011E-10
  4.4206E-13  7.6531E-10 -1.6726E-12  1.9531E-11  1.4833E-10  4.0260E-09
  4.4482E-13  3.5516E-08 -1.8372E-11  1.4833E-10  6.6253E-09  1.2014E-07
  2.6782E-10  6.2610E-07 -3.5011E-10  4.0260E-09  1.2014E-07  2.9818E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.241141  -73.480805    0.668687    0.029415   -0.754919  2458996.010801
# Heliocentric elements and errors
Epoch:              2458990.5000  =  2020/05/21
Mean Anomaly:          207.48526 +/-    20.942
Argument of Peri:      165.98258 +/-    21.427
Long of Asc Node:      281.51642 +/-     0.140
Inclination:            27.43672 +/-     0.756
Eccentricity:         0.20196199 +/-    0.0565
Semi-Major Axis:     43.24896254 +/-    0.6229
Time of Perihelion: 2503002.5182 +/-    5968.0
Perihelion:          34.51431593 +/-    2.4944
Aphelion:            51.98360914 +/-    2.5564
Period (y)              284.4276 +/-      6.14
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           13.93374136 +/-    0.0590
Ecliptic Y          -49.32160341 +/-    0.1990
Ecliptic Z            1.97605712 +/-    0.0081
Ecliptic XDOT         0.00178872 +/-    0.0001
Ecliptic YDOT         0.00072569 +/-    0.0002
Ecliptic ZDOT         0.00098516 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   51.29010152 +/-    0.1921
Geocenter to KBO     50.52269241 +/-    0.2078
# Hcoef:  9.22

The following table shows the complete astrometric record for 20KT11. 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 (20KT11) followed by the observatory code and reference code for the source of the astrometry.

2020 05  26.510    19 10 29.147  -20 11 35.91  26.9R 20KT11    266  C~4Al3      
2020 05  26.531    19 10 29.079  -20 11 35.90  26.9R 20KT11    266  C~4Al3      
2020 05  29.570    19 10 19.260  -20 11 34.92  26.0R 20KT11    266  C~4Al3      
2020 05  29.590    19 10 19.189  -20 11 34.91  26.0R 20KT11    266  C~4Al3      
2020 05  31.520    19 10 12.705  -20 11 34.89  25.9R 20KT11    266  C~4Al3      
2020 05  31.530    19 10 12.671  -20 11 34.89  25.9R 20KT11    266  C~4Al3      
2020 06  24.455    19 08 39.501  -20 12 06.33  25.8R 20KT11    266  C~4Al3      
2020 06  24.496    19 08 39.326  -20 12 06.43  25.8R 20KT11    266  C~4Al3      
2020 08  12.335    19 05 16.986  -20 14 40.52  25.7R 20KT11    266  C~4Al3      
2020 08  12.391    19 05 16.788  -20 14 40.69  25.7R 20KT11    266  C~4Al3      
2020 08  14.315    19 05 10.202  -20 14 46.46  25.7R 20KT11    266  C~4Al3      
2020 08  14.400    19 05 09.906  -20 14 46.71  25.7R 20KT11    266  C~4Al3      

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    -0.08       0.00     0.04
     2   0.0001     -0.95    -0.08       0.13     0.04
     3   0.0084   -138.06     0.05      17.74     0.02
     4   0.0084   -139.05     0.01      17.87     0.03
     5   0.0137   -229.67     0.07      28.86    -0.00
     6   0.0137   -230.14     0.08      28.92    -0.00
     7   0.0792  -1536.21    -0.04     153.70    -0.09
     8   0.0794  -1538.67    -0.01     153.89    -0.10
     9   0.2131  -4386.08    -0.04     329.10     0.01
    10   0.2132  -4388.87    -0.03     329.24     0.01
    11   0.2185  -4481.66     0.06     333.95     0.02
    12   0.2187  -4485.83     0.02     334.17     0.02

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.

20KT11    quality flag:1

Type:       SCATNEAR  SCATNEAR  CENTAURR

axisobj        42.887    47.603    41.187
ecceobj         0.211     0.179     0.289
incobj         27.598    25.403    29.339
qmin           32.448    37.451    29.111
qmax           53.882    58.981    53.591
amean          42.843    47.797    41.177
amin           42.244    47.205    40.794
amax           43.456    48.462    41.578
emean           0.217     0.177     0.285
emin            0.193     0.122     0.278
emax            0.242     0.218     0.293
imean          28.901    26.971    30.883
imin           28.210    26.348    30.756
imax           29.420    27.838    31.013
excite_mean     0.530     0.487     0.587
fracstop        1.000     1.000     0.002
cjmean          2.741     2.840     2.655

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       183.1     187.7     164.6
kozaiamp        179.9     180.0       1.6