Orbit Fit and Astrometric record for 20KQ55

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: 20KQ55    
# 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:
   0.000000   0.015756   0.000004  -0.003432   0.022129   0.000000
# Chi-squared of fit:     0.28 DOF:     30 RMS:  0.02
# Min/Max residuals:    -0.04    0.04
# Exact a, adot, b, bdot, g, gdot:
  1.494362E-05  2.211005E-02 -2.369678E-06 -3.425087E-03  2.321069E-02 -9.917060E-04
# Covariance matrix:
  2.9597E-13  6.5517E-11 -4.1202E-14 -2.2646E-13  1.3070E-11  3.7342E-10
  6.5517E-11  1.7171E-07 -1.0831E-10 -2.2380E-10  3.1586E-08  4.6109E-07
 -4.1202E-14 -1.0831E-10  2.4378E-13 -8.8336E-13 -1.9918E-11 -2.8927E-10
 -2.2646E-13 -2.2380E-10 -8.8336E-13  1.1622E-11 -4.2395E-11 -8.8826E-10
  1.3070E-11  3.1586E-08 -1.9918E-11 -4.2395E-11  5.8179E-09  8.6528E-08
  3.7342E-10  4.6109E-07 -2.8927E-10 -8.8826E-10  8.6528E-08  1.6385E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.531867  -73.835652    0.625775    0.034840   -0.790811  2458998.947781
# Heliocentric elements and errors
Epoch:              2458990.5000  =  2020/05/21
Mean Anomaly:          308.97000 +/-    35.257
Argument of Peri:      221.85031 +/-    43.427
Long of Asc Node:      121.08000 +/-     0.290
Inclination:             9.09707 +/-     0.163
Eccentricity:         0.07185961 +/-    0.0367
Semi-Major Axis:     45.80546640 +/-    0.9712
Time of Perihelion: 2475041.3281 +/-   11077.8
Perihelion:          42.51390345 +/-    1.9060
Aphelion:            49.09702935 +/-    1.9758
Period (y)              310.0160 +/-      9.86
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           11.60746640 +/-    0.0394
Ecliptic Y          -42.28133689 +/-    0.1359
Ecliptic Z            1.90318775 +/-    0.0063
Ecliptic XDOT         0.00248547 +/-    0.0001
Ecliptic YDOT         0.00082471 +/-    0.0001
Ecliptic ZDOT        -0.00040902 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.88697812 +/-    0.1313
Geocenter to KBO     43.08359731 +/-    0.1416
# Hcoef:  9.88

The following table shows the complete astrometric record for 20KQ55. 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 (20KQ55) followed by the observatory code and reference code for the source of the astrometry.

2020 05  29.44698  19 08 50.350  -19 56 48.84  26.1r 20KQ55    266  C~6c5c      
2020 05  29.53371  19 08 50.030  -19 56 49.35  26.1r 20KQ55    266  C~6c5c      
2020 05  29.61905  19 08 49.715  -19 56 49.83  26.1r 20KQ55    266  C~6c5c      
2020 05  31.44139  19 08 43.045  -19 57 00.56  26.4r 20KQ55    266  C~6c5c      
2020 05  31.52961  19 08 42.710  -19 57 01.10  26.4r 20KQ55    266  C~6c5c      
2020 05  31.61814  19 08 42.372  -19 57 01.63  26.4r 20KQ55    266  C~6c5c      
2020 06  21.45390  19 07 14.228  -19 59 35.05  26.3r 20KQ55    266  C~6c5c      
2020 06  21.53376  19 07 13.852  -19 59 35.73  26.3r 20KQ55    266  C~6c5c      
2020 06  21.61261  19 07 13.481  -19 59 36.38  26.3r 20KQ55    266  C~6c5c      
2020 06  24.43648  19 07 00.316  -20 00 00.85  26.1r 20KQ55    266  C~6c5c      
2020 06  24.52739  19 06 59.881  -20 00 01.65  26.1r 20KQ55    266  C~6c5c      
2020 06  24.61708  19 06 59.453  -20 00 02.41  26.1r 20KQ55    266  C~6c5c      
2020 08  12.26680  19 03 17.823  -20 08 01.43  26.4r 20KQ55    266  C~6c5c      
2020 08  12.34843  19 03 17.510  -20 08 02.24  26.4r 20KQ55    266  C~6c5c      
2020 08  12.42950  19 03 17.199  -20 08 03.02  26.4r 20KQ55    266  C~6c5c      
2020 08  14.24286  19 03 10.503  -20 08 20.60  26.1r 20KQ55    266  C~6c5c      
2020 08  14.33285  19 03 10.168  -20 08 21.48  26.1r 20KQ55    266  C~6c5c      
2020 08  14.42134  19 03 09.838  -20 08 22.33  26.1r 20KQ55    266  C~6c5c      

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   0.0002     -4.54     0.02       0.03     0.01
     3   0.0005     -9.01     0.02       0.07     0.01
     4   0.0055   -103.66    -0.03       0.49     0.00
     5   0.0057   -108.42    -0.02       0.51     0.00
     6   0.0059   -113.21    -0.03       0.54    -0.00
     7   0.0630  -1365.29     0.02      -7.04    -0.03
     8   0.0632  -1370.63     0.02      -7.10    -0.03
     9   0.0634  -1375.90     0.02      -7.14    -0.03
    10   0.0712  -1563.07    -0.01     -10.06     0.02
    11   0.0714  -1569.25    -0.01     -10.15     0.02
    12   0.0716  -1575.33    -0.01     -10.21     0.03
    13   0.2048  -4732.80    -0.03    -135.48    -0.03
    14   0.2051  -4737.27    -0.01    -135.80    -0.04
    15   0.2053  -4741.71    -0.01    -136.10    -0.03
    16   0.2103  -4837.42     0.02    -143.25     0.04
    17   0.2105  -4842.21     0.02    -143.61     0.04
    18   0.2107  -4846.92     0.01    -143.95     0.03

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.

20KQ55    quality flag:1

Type:      CLASSICAL CLASSICAL  SCATNEAR

axisobj        45.232    50.512    42.438
ecceobj         0.069     0.160     0.180
incobj          9.122     8.630     9.664
qmin           41.607    41.867    33.780
qmax           49.502    60.191    51.717
amean          45.457    50.837    42.631
amin           45.092    50.389    42.217
amax           45.832    51.334    43.079
emean           0.068     0.162     0.156
emin            0.056     0.152     0.116
emax            0.080     0.173     0.205
imean           7.663     7.115     4.695
imin            7.258     6.868     1.576
imax            8.071     7.390     8.705
excite_mean     0.150     0.204     0.178
fracstop        1.000     1.000     1.000
cjmean          3.092     3.137     3.047

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       179.4     181.2     179.7
kozaiamp        180.0     180.0     180.0