Orbit Fit and Astrometric record for 20KW53

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: 20KW53    
# Created Tue Apr  1 01:11:19 2025
# Orbit generated from Bernstein formalism
# Fitting     21 observations of     21
# Arc:  76.98d
# First observation: 2020/05/28
#  Last observation: 2020/08/13
Preliminary a, adot, b, bdot, g, gdot:
   0.000003   0.014803   0.000003  -0.001577   0.021065   0.000000
# Chi-squared of fit:     0.46 DOF:     36 RMS:  0.03
# Min/Max residuals:    -0.06    0.04
# Exact a, adot, b, bdot, g, gdot:
  1.402500E-05  1.948523E-02 -1.218275E-06 -1.587482E-03  2.184783E-02  3.121298E-04
# Covariance matrix:
  2.0175E-13  2.3436E-11 -1.5302E-14 -1.4091E-13  5.1661E-12  2.4383E-10
  2.3436E-11  1.4281E-07 -8.6820E-11 -5.4013E-10  2.6811E-08  5.3026E-07
 -1.5302E-14 -8.6820E-11  1.8064E-13 -6.1539E-13 -1.6305E-11 -3.2346E-10
 -1.4091E-13 -5.4013E-10 -6.1539E-13  1.7387E-11 -1.0183E-10 -2.1128E-09
  5.1661E-12  2.6811E-08 -1.6305E-11 -1.0183E-10  5.0389E-09  1.0085E-07
  2.4383E-10  5.3026E-07 -3.2346E-10 -2.1128E-09  1.0085E-07  2.3060E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.334832  -72.528281    0.656623    0.031084   -0.765497  2458997.947541
# Heliocentric elements and errors
Epoch:              2458990.5000  =  2020/05/21
Mean Anomaly:          178.02227 +/-    87.155
Argument of Peri:      335.27322 +/-    86.513
Long of Asc Node:      133.07433 +/-     0.461
Inclination:             5.15081 +/-     0.084
Eccentricity:         0.04886347 +/-    0.0271
Semi-Major Axis:     44.38192474 +/-    1.1044
Time of Perihelion: 2513581.7926 +/-   26069.5
Perihelion:          42.21326996 +/-    1.5975
Aphelion:            46.55057953 +/-    1.6705
Period (y)              295.6769 +/-     11.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           13.34000960 +/-    0.0446
Ecliptic Y          -44.55801732 +/-    0.1417
Ecliptic Z            1.86469584 +/-    0.0061
Ecliptic XDOT         0.00235142 +/-    0.0001
Ecliptic YDOT         0.00069163 +/-    0.0002
Ecliptic ZDOT        -0.00019741 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.54943452 +/-    0.1363
Geocenter to KBO     45.77113327 +/-    0.1487
# Hcoef:  9.47

The following table shows the complete astrometric record for 20KW53. 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 (20KW53) followed by the observatory code and reference code for the source of the astrometry.

2020 05  28.44674  19 14 27.532  -19 58 57.04  26.2r 20KW53    266  C~6c5Y      
2020 05  28.50129  19 14 27.348  -19 58 57.32  26.2r 20KW53    266  C~6c5Y      
2020 05  28.55756  19 14 27.156  -19 58 57.59  26.2r 20KW53    266  C~6c5Y      
2020 05  30.43935  19 14 20.816  -19 59 07.03  26.0r 20KW53    266  C~6c5Y      
2020 05  30.53044  19 14 20.497  -19 59 07.51  26.0r 20KW53    266  C~6c5Y      
2020 05  30.61862  19 14 20.187  -19 59 07.96  26.0r 20KW53    266  C~6c5Y      
2020 06  01.43269  19 14 13.865  -19 59 17.45  26.3r 20KW53    266  C~6c5Y      
2020 06  01.47325  19 14 13.718  -19 59 17.68  26.3r 20KW53    266  C~6c5Y      
2020 06  01.60571  19 14 13.238  -19 59 18.39  26.3r 20KW53    266  C~6c5Y      
2020 06  20.45583  19 12 58.052  -20 01 22.59  26.2r 20KW53    266  C~6c5Y      
2020 06  20.52860  19 12 57.729  -20 01 23.14  26.2r 20KW53    266  C~6c5Y      
2020 06  20.62233  19 12 57.315  -20 01 23.84  26.2r 20KW53    266  C~6c5Y      
2020 06  22.44948  19 12 49.331  -20 01 37.94  25.9r 20KW53    266  C~6c5Y      
2020 06  22.52092  19 12 49.011  -20 01 38.50  25.9r 20KW53    266  C~6c5Y      
2020 06  22.59118  19 12 48.696  -20 01 39.03  25.9r 20KW53    266  C~6c5Y      
2020 06  25.44823  19 12 36.019  -20 02 01.80  26.1r 20KW53    266  C~6c5Y      
2020 06  25.53213  19 12 35.637  -20 02 02.47  26.1r 20KW53    266  C~6c5Y      
2020 06  25.61487  19 12 35.262  -20 02 03.12  26.1r 20KW53    266  C~6c5Y      
2020 08  13.24332  19 09 03.673  -20 09 18.80  25.8r 20KW53    266  C~6c5Y      
2020 08  13.33331  19 09 03.341  -20 09 19.59  25.8r 20KW53    266  C~6c5Y      
2020 08  13.42301  19 09 03.009  -20 09 20.37  25.8r 20KW53    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     0.02       0.00     0.01
     2   0.0001     -2.61     0.02       0.05     0.01
     3   0.0003     -5.33     0.01       0.13     0.01
     4   0.0055    -95.18     0.01       2.11    -0.05
     5   0.0057    -99.70     0.02       2.21    -0.06
     6   0.0059   -104.09     0.02       2.32    -0.06
     7   0.0109   -193.69    -0.03       4.21     0.02
     8   0.0110   -195.78    -0.04       4.24     0.02
     9   0.0114   -202.58    -0.04       4.39     0.02
    10   0.0630  -1269.54    -0.03      14.49     0.01
    11   0.0632  -1274.12    -0.03      14.51     0.02
    12   0.0635  -1280.00    -0.03      14.55     0.01
    13   0.0685  -1393.40     0.03      14.60     0.04
    14   0.0686  -1397.95     0.03      14.60     0.03
    15   0.0688  -1402.42     0.03      14.63     0.04
    16   0.0767  -1582.53     0.00      14.28    -0.02
    17   0.0769  -1587.95     0.00      14.28    -0.01
    18   0.0771  -1593.28     0.01      14.29    -0.01
    19   0.2103  -4605.50    -0.00     -55.47    -0.01
    20   0.2105  -4610.24     0.01     -55.69    -0.01
    21   0.2107  -4614.98    -0.01     -55.91    -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.

20KW53    quality flag:1

Type:      CLASSICAL CLASSICAL  SCATNEAR

axisobj        43.874    50.111    41.442
ecceobj         0.059     0.195     0.202
incobj          5.159     4.912     5.419
qmin           40.457    39.807    32.854
qmax           47.930    61.546    51.795
amean          44.088    50.415    41.360
amin           43.737    49.951    40.219
amax           44.450    50.943    42.547
emean           0.063     0.198     0.180
emin            0.048     0.187     0.142
emax            0.079     0.208     0.217
imean           4.121     3.682     3.363
imin            3.502     3.444     1.602
imax            4.802     3.930     5.387
excite_mean     0.096     0.208     0.189
fracstop        1.000     1.000     1.000
cjmean          3.092     3.129     3.030

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       182.7     175.2     181.8
kozaiamp        180.0     180.0     180.0