Orbit Fit and Astrometric record for 20KQ54

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: 20KQ54    
# Created Tue Apr  1 01:11:19 2025
# Orbit generated from Bernstein formalism
# Fitting     21 observations of     21
# Arc:  76.98d
# First observation: 2020/05/30
#  Last observation: 2020/08/15
Preliminary a, adot, b, bdot, g, gdot:
   0.000001   0.017702   0.000004  -0.000922   0.022991   0.000000
# Chi-squared of fit:     1.18 DOF:     36 RMS:  0.04
# Min/Max residuals:    -0.08    0.09
# Exact a, adot, b, bdot, g, gdot:
  1.549206E-05  2.359839E-02 -4.011341E-07 -9.182670E-04  2.398984E-02 -2.971779E-05
# Covariance matrix:
  2.9019E-13  6.1155E-11 -3.8659E-14 -3.7735E-14  1.2418E-11  3.8913E-10
  6.1155E-11  1.8610E-07 -1.1224E-10 -1.4958E-11  3.4612E-08  5.7907E-07
 -3.8659E-14 -1.1224E-10  2.1957E-13 -9.3568E-13 -2.0885E-11 -3.5127E-10
 -3.7735E-14 -1.4958E-11 -9.3568E-13  1.0871E-11 -3.0237E-12 -1.0109E-10
  1.2418E-11  3.4612E-08 -2.0885E-11 -3.0237E-12  6.4443E-09  1.0915E-07
  3.8913E-10  5.7907E-07 -3.5127E-10 -1.0109E-10  1.0915E-07  2.1283E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.902679  -72.247665    0.634498    0.025924   -0.784226  2458999.940151
# Heliocentric elements and errors
Epoch:              2458990.5000  =  2020/05/21
Mean Anomaly:          342.64342 +/-    68.550
Argument of Peri:      158.86695 +/-    76.826
Long of Asc Node:      147.22699 +/-     0.576
Inclination:             2.88363 +/-     0.034
Eccentricity:         0.05232363 +/-    0.0116
Semi-Major Axis:     44.70261066 +/-    1.1501
Time of Perihelion: 2464253.8150 +/-   20786.5
Perihelion:          42.36360775 +/-    1.2067
Aphelion:            47.04161357 +/-    1.3164
Period (y)              298.8873 +/-     11.53
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           12.34327737 +/-    0.0425
Ecliptic Y          -40.62513793 +/-    0.1328
Ecliptic Z            1.38405256 +/-    0.0046
Ecliptic XDOT         0.00257308 +/-    0.0001
Ecliptic YDOT         0.00082463 +/-    0.0001
Ecliptic ZDOT        -0.00010509 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.48145395 +/-    0.1276
Geocenter to KBO     41.68430693 +/-    0.1395
# Hcoef: 10.21

The following table shows the complete astrometric record for 20KQ54. 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 (20KQ54) followed by the observatory code and reference code for the source of the astrometry.

2020 05  30.43935  19 15 52.812  -20 22 30.50  26.1r 20KQ54    266  C~6c5a      
2020 05  30.53044  19 15 52.470  -20 22 31.01  26.1r 20KQ54    266  C~6c5a      
2020 05  30.61862  19 15 52.138  -20 22 31.49  26.1r 20KQ54    266  C~6c5a      
2020 06  01.43269  19 15 45.381  -20 22 41.64  26.7r 20KQ54    266  C~6c5a      
2020 06  01.47325  19 15 45.224  -20 22 41.88  26.7r 20KQ54    266  C~6c5a      
2020 06  01.60571  19 15 44.709  -20 22 42.65  26.7r 20KQ54    266  C~6c5a      
2020 06  20.45583  19 14 23.873  -20 24 54.85  26.6r 20KQ54    266  C~6c5a      
2020 06  20.52860  19 14 23.525  -20 24 55.43  26.6r 20KQ54    266  C~6c5a      
2020 06  20.62233  19 14 23.078  -20 24 56.17  26.6r 20KQ54    266  C~6c5a      
2020 06  22.44948  19 14 14.463  -20 25 10.98  26.5r 20KQ54    266  C~6c5a      
2020 06  22.52092  19 14 14.117  -20 25 11.57  26.5r 20KQ54    266  C~6c5a      
2020 06  22.59118  19 14 13.778  -20 25 12.14  26.5r 20KQ54    266  C~6c5a      
2020 06  25.44823  19 14 00.092  -20 25 36.23  26.6r 20KQ54    266  C~6c5a      
2020 06  25.53213  19 13 59.679  -20 25 36.94  26.6r 20KQ54    266  C~6c5a      
2020 06  25.61487  19 13 59.274  -20 25 37.62  26.6r 20KQ54    266  C~6c5a      
2020 08  13.24332  19 10 10.228  -20 33 07.01  26.8r 20KQ54    266  C~6c5a      
2020 08  13.33331  19 10 09.868  -20 33 07.80  26.8r 20KQ54    266  C~6c5a      
2020 08  13.42301  19 10 09.510  -20 33 08.58  26.8r 20KQ54    266  C~6c5a      
2020 08  15.24331  19 10 02.513  -20 33 24.24  25.6r 20KQ54    266  C~6c5a      
2020 08  15.34125  19 10 02.134  -20 33 25.09  25.6r 20KQ54    266  C~6c5a      
2020 08  15.42111  19 10 01.824  -20 33 25.77  25.6r 20KQ54    266  C~6c5a      

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     0.01       0.00    -0.04
     2   0.0002     -4.83     0.01       0.12    -0.04
     3   0.0005     -9.53    -0.00       0.24    -0.04
     4   0.0055   -105.05     0.00       2.46     0.03
     5   0.0056   -107.27    -0.00       2.51     0.03
     6   0.0059   -114.55    -0.01       2.68     0.03
     7   0.0575  -1258.65    -0.04      17.23    -0.05
     8   0.0577  -1263.58    -0.04      17.27    -0.05
     9   0.0580  -1269.91    -0.04      17.34    -0.05
    10   0.0630  -1391.92     0.03      18.03     0.09
    11   0.0632  -1396.82     0.02      18.06     0.08
    12   0.0634  -1401.62     0.03      18.10     0.08
    13   0.0712  -1595.52     0.01      18.58    -0.02
    14   0.0714  -1601.37     0.01      18.62    -0.02
    15   0.0717  -1607.10     0.02      18.66    -0.02
    16   0.2048  -4857.16    -0.01     -29.39    -0.08
    17   0.2050  -4862.28    -0.01     -29.57    -0.07
    18   0.2053  -4867.37    -0.01     -29.74    -0.07
    19   0.2103  -4966.87     0.00     -33.43     0.06
    20   0.2105  -4972.26     0.02     -33.63     0.07
    21   0.2108  -4976.67     0.00     -33.78     0.06

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.

20KQ54    quality flag:1

Type:      CLASSICAL  SCATNEAR CLASSICAL

axisobj        44.131    50.736    41.028
ecceobj         0.044     0.214     0.163
incobj          2.884     2.782     2.998
qmin           41.646    39.362    34.164
qmax           47.221    63.376    48.548
amean          44.356    51.076    41.192
amin           44.010    50.592    40.840
amax           44.712    51.639    41.578
emean           0.043     0.216     0.106
emin            0.027     0.205     0.031
emax            0.056     0.227     0.168
imean           2.489     2.138     6.688
imin            1.900     1.879     1.993
imax            3.073     2.416    10.628
excite_mean     0.061     0.219     0.168
fracstop        1.000     1.000     1.000
cjmean          3.101     3.131     3.035

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       174.8     181.7     132.7
kozaiamp        180.0     179.9     180.0