Orbit Fit and Astrometric record for 558168

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: 558168    
# Created Fri Dec  3 02:08:11 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting    103 observations of    103
# Arc:  10.19y
# First observation: 2011/02/23
#  Last observation: 2021/05/03
# Chi-squared of fit:    45.85 DOF:    200 RMS:  0.12
# Min/Max residuals:    -0.40    0.57
# Exact a, adot, b, bdot, g, gdot:
  2.993193E-05  1.053962E-01 -4.105569E-06 -1.222391E-02  5.647984E-02 -1.944175E-02
# Covariance matrix:
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
#      lat0       lon0       xBary       yBary       zBary        JD0
  -14.030126  144.732079   -0.166424   -0.237414   -0.950025  2455615.935076
# Heliocentric elements and errors
Epoch:              2455616.5000  =  2011/02/24
Mean Anomaly:          357.42739 +/-     0.000
Argument of Peri:      268.52049 +/-     0.000
Long of Asc Node:      261.04919 +/-     0.000
Inclination:            14.71486 +/-     0.000
Eccentricity:         0.73016509 +/-    0.0000
Semi-Major Axis:     66.69663513 +/-    0.0000
Time of Perihelion: 2457038.2600 +/-       0.0
Perihelion:          17.99708067 +/-    0.0000
Aphelion:           115.39618960 +/-    0.0000
Period (y)              544.7084 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -14.91633284 +/-    0.0000
Ecliptic Y           10.34686327 +/-    0.0000
Ecliptic Z           -4.29243513 +/-    0.0000
Ecliptic XDOT        -0.00208746 +/-    0.0000
Ecliptic YDOT        -0.00477618 +/-    0.0000
Ecliptic ZDOT        -0.00034638 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   18.65430174 +/-    0.0000
Geocenter to KBO     17.70556757 +/-    0.0000
# Hcoef:  8.86

The following table shows the complete astrometric record for 558168. 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 (558168) followed by the observatory code and reference code for the source of the astrometry.

2011 02  23.43431  09 29 31.833  +00 01 22.11  21.2G 558168    F51  C~2jhw      
2011 02  23.44661  09 29 31.726  +00 01 22.43  21.4G 558168    F51  C~2jhw      
2011 03  12.41275  09 27 12.887  +00 15 33.37  20.8G 558168    F51  C~2jhw      
2011 03  12.42450  09 27 12.844  +00 15 34.14  20.9G 558168    F51  C~2jhw      
2012 01  25.42127  09 56 13.647  -02 54 26.81  21.4w 558168    F51  C~1vXw      
2012 01  25.43556  09 56 13.529  -02 54 26.55  21.5w 558168    F51  C~1vXw      
2012 01  25.44984  09 56 13.407  -02 54 26.40  21.4w 558168    F51  C~1vXw      
2012 01  25.46421  09 56 13.286  -02 54 26.13  21.5w 558168    F51  C~1vXw      
2012 02  12.43853  09 53 34.960  -02 46 31.13  20.9G 558168    F51  C~2jhw      
2012 02  12.45222  09 53 34.813  -02 46 31.07  21.2G 558168    F51  C~2jhw      
2012 02  12.46493  09 53 34.690  -02 46 30.78  22.3G 558168    F51  C~2jhw      
2012 04  11.29487  09 46 27.219  -01 54 35.90  21.6G 558168    F51  C~2jhw      
2012 04  11.30718  09 46 27.172  -01 54 35.23  21.4G 558168    F51  C~2jhw      
2012 04  27.25316  09 45 58.915  -01 41 44.59  22.2G 558168    F51  C~2jhw      
2012 04  27.26378  09 45 58.912  -01 41 43.97  22.7G 558168    F51  C~2jhw      
2012 12  01.63507  10 21 58.359  -05 07 31.68  21.8G 558168    F51  C~2jhw      
2012 12  01.63896  10 21 58.340  -05 07 31.61  21.3G 558168    F51  C~2jhw      
2012 12  01.64637  10 21 58.374  -05 07 32.16  21.9G 558168    F51  C~2jhw      
2012 12  01.65025  10 21 58.362  -05 07 32.83  22.0G 558168    F51  C~2jhw      
2013 01  18.54847  10 19 55.174  -05 36 34.18  21.1G 558168    F51  C~2jhw      
2013 02  03.45795  10 17 52.212  -05 33 29.06  21.4r 558168    F51  C~1vXw      
2013 02  03.46959  10 17 52.094  -05 33 28.99  21.3r 558168    F51  C~1vXw      
2013 02  03.48212  10 17 51.997  -05 33 28.69  21.3i 558168    F51  C~1vXw      
2013 02  03.49488  10 17 51.894  -05 33 28.44  21.6i 558168    F51  C~1vXw      
2014 01  24.52051  10 42 45.520  -08 17 04.31  21.8G 558168    F51  C~2jhw      
2014 01  24.53152  10 42 45.460  -08 17 04.46  21.9G 558168    F51  C~2jhw      
2014 12  10.63802  11 07 49.259  -10 21 22.24  21.3i 558168    F51  C~1vXw      
2014 12  10.64198  11 07 49.255  -10 21 22.45  21.2i 558168    F51  C~1vXw      
2014 12  10.64608  11 07 49.269  -10 21 22.86  21.3i 558168    F51  C~1vXw      
2014 12  10.65005  11 07 49.288  -10 21 23.16  21.4i 558168    F51  C~1vXw      
2014 12  18.60247  11 08 07.872  -10 30 42.49  21.2i 558168    F51  C~1vXw      
2014 12  18.62517  11 08 07.916  -10 30 43.93  21.0i 558168    F51  C~1vXw      
2014 12  18.63642  11 08 07.909  -10 30 44.79  21.0i 558168    F51  C~1vXw      
2015 01  16.57774  11 07 23.669  -10 51 47.38  21.4r 558168    F51  C~1vXw      
2015 01  16.58837  11 07 23.611  -10 51 47.57  21.6r 558168    F51  C~1vXw      
2015 01  16.59918  11 07 23.561  -10 51 47.75  21.7r 558168    F51  C~1vXw      
2015 01  20.49637  11 07 05.167  -10 52 55.62  21.5w 558168    F51  C~1vXw      
2015 01  20.50950  11 07 05.094  -10 52 55.85  21.5w 558168    F51  C~1vXw      
2015 01  20.52262  11 07 05.031  -10 52 55.90  21.6w 558168    F51  C~1vXw      
2015 01  20.53579  11 07 04.958  -10 52 56.13  21.6w 558168    F51  C~1vXw      
2015 01  22.50800  11 06 54.635  -10 53 20.62  21.4w 558168    F51  C~1vXw      
2015 01  22.52059  11 06 54.566  -10 53 20.81  21.4w 558168    F51  C~1vXw      
2015 01  22.53316  11 06 54.490  -10 53 20.92  21.5w 558168    F51  C~1vXw      
2015 01  22.54575  11 06 54.426  -10 53 20.99  21.4w 558168    F51  C~1vXw      
2015 03  22.35798  10 58 55.108  -10 21 26.38  21.4w 558168    F51  C~1vXw      
2015 03  22.36854  10 58 55.022  -10 21 25.80  21.4w 558168    F51  C~1vXw      
2015 03  22.37910  10 58 54.932  -10 21 25.08  21.4w 558168    F51  C~1vXw      
2015 03  22.38964  10 58 54.834  -10 21 24.53  21.4w 558168    F51  C~1vXw      
2015 03  23.38666  10 58 46.407  -10 20 19.56  21.2G 558168    F51  C~2jhw      
2015 03  23.39728  10 58 46.319  -10 20 18.83  21.2G 558168    F51  C~2jhw      
2015 03  23.40786  10 58 46.230  -10 20 18.09  21.1G 558168    F51  C~2jhw      
2015 03  23.41848  10 58 46.131  -10 20 17.36  21.3G 558168    F51  C~2jhw      
2015 04  23.33203  10 55 20.536  -09 44 47.25  21.1G 558168    F51  C~2jhw      
2015 04  23.34456  10 55 20.463  -09 44 46.39  21.1G 558168    F51  C~2jhw      
2016 01  18.56422  11 31 19.536  -13 20 17.92  21.6G 558168    F51  C~2jhw      
2016 01  18.57675  11 31 19.487  -13 20 18.26  21.2G 558168    F51  C~2jhw      
2016 01  18.58926  11 31 19.446  -13 20 18.54  21.6G 558168    F51  C~2jhw      
2016 01  18.60169  11 31 19.396  -13 20 18.95  21.4G 558168    F51  C~2jhw      
2016 01  19.66125  11 31 15.571  -13 20 45.49  21.7G 558168    F51  C~2jhw      
2016 01  19.66912  11 31 15.557  -13 20 45.61  21.3G 558168    F51  C~2jhw      
2016 02  01.54574  11 30 13.185  -13 23 39.81  21.3G 558168    F51  C~2jhw      
2016 03  01.43738  11 26 31.776  -13 13 49.70  21.3G 558168    F51  C~2jhw      
2016 03  01.44811  11 26 31.680  -13 13 49.16  21.2G 558168    F51  C~2jhw      
2016 03  01.45851  11 26 31.583  -13 13 48.78  21.6G 558168    F51  C~2jhw      
2016 03  01.46891  11 26 31.489  -13 13 48.39  21.3G 558168    F51  C~2jhw      
2016 03  12.43543  11 24 52.581  -13 04 56.21  21.2G 558168    F51  C~2jhw      
2016 04  01.03157  11 22 01.48   -12 44 20.3   21.7V 558168    W84  C~1vXw      
2016 04  01.03473  11 22 01.46   -12 44 20.1         558168    W84  C~1vXw      
2016 04  01.04107  11 22 01.40   -12 44 19.6         558168    W84  C~1vXw      
2016 04  01.04421  11 22 01.38   -12 44 19.3         558168    W84  C~1vXw      
2016 04  03.34304  11 21 42.912  -12 41 39.25  21.3G 558168    F51  C~2jhw      
2016 04  03.35429  11 21 42.820  -12 41 38.43  21.3G 558168    F51  C~2jhw      
2016 04  03.36554  11 21 42.732  -12 41 37.58  21.5G 558168    F51  C~2jhw      
2016 04  03.37680  11 21 42.633  -12 41 36.84  21.4G 558168    F51  C~2jhw      
2016 05  21.31528  11 18 10.634  -11 48 04.42  21.8G 558168    F51  C~2jhw      
2017 02  04.56931  11 54 16.538  -15 43 10.00  21.6G 558168    F51  C~2jhw      
2017 02  04.58115  11 54 16.474  -15 43 10.07  21.7G 558168    F51  C~2jhw      
2017 02  04.59297  11 54 16.409  -15 43 10.07  21.6G 558168    F51  C~2jhw      
2017 02  04.60479  11 54 16.341  -15 43 10.19  21.8G 558168    F51  C~2jhw      
2017 02  17.51763  11 52 53.186  -15 41 48.66  20.8G 558168    F51  C~2jhw      
2017 02  17.53010  11 52 53.072  -15 41 48.72  21.0G 558168    F51  C~2jhw      
2017 02  17.54259  11 52 52.989  -15 41 48.46  21.7G 558168    F51  C~2jhw      
2017 02  17.55506  11 52 52.888  -15 41 48.47  21.9G 558168    F51  C~2jhw      
2017 03  21.41358  11 48 21.362  -15 20 48.35  21.4G 558168    F51  C~2jhw      
2017 03  21.42479  11 48 21.254  -15 20 47.78  21.6G 558168    F51  C~2jhw      
2017 03  31.36541  11 46 53.189  -15 10 20.40  21.3G 558168    F51  C~2jhw      
2017 03  31.37728  11 46 53.083  -15 10 19.56  21.4G 558168    F51  C~2jhw      
2017 03  31.38916  11 46 52.980  -15 10 18.69  21.2G 558168    F51  C~2jhw      
2017 03  31.40104  11 46 52.874  -15 10 18.00  21.3G 558168    F51  C~2jhw      
2017 04  25.32379  11 43 46.066  -14 40 31.70  21.9G 558168    F51  C~2jhw      
2017 04  25.34470  11 43 45.942  -14 40 30.05  21.8G 558168    F51  C~2jhw      
2017 04  25.35520  11 43 45.874  -14 40 29.30  21.6G 558168    F51  C~2jhw      
2020 04  27.36553  12 56 17.104  -20 33 07.27  21.5w 558168    F51  C~3qMy      
2020 04  27.37669  12 56 17.013  -20 33 06.53  21.5w 558168    F51  C~3qMy      
2020 04  27.38785  12 56 16.917  -20 33 05.71  21.5w 558168    F51  C~3qMy      
2020 04  27.39899  12 56 16.830  -20 33 04.90  21.5w 558168    F51  C~3qMy      
2020 05  25.30924  12 53 21.135  -20 00 47.38  21.7w 558168    F52  C~3vRb      
2020 05  25.32113  12 53 21.081  -20 00 46.47  21.5w 558168    F52  C~3vRb      
2020 05  25.34492  12 53 20.985  -20 00 45.12  21.5w 558168    F52  C~3vRb      
2021 05  03.372293 13 18 52.210  -21 54 03.68  21.4w 558168    F51  C~4n6v      
2021 05  03.383313 13 18 52.126  -21 54 03.00  21.4w 558168    F51  C~4n6v      
2021 05  03.394321 13 18 52.023  -21 54 02.39  21.4w 558168    F51  C~4n6v      
2021 05  03.405332 13 18 51.944  -21 54 01.56  21.5w 558168    F51  C~4n6v      

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    -0.04       0.00     0.16
     2   0.0000      0.00     0.03       0.00    -0.09
     3   0.0465      0.00    -0.10       0.00    -0.06
     4   0.0465      0.00     0.57       0.00     0.10
     5   0.9199      0.00    -0.09       0.00    -0.05
     6   0.9199      0.00    -0.06       0.00     0.00
     7   0.9200      0.00    -0.09       0.00    -0.06
     8   0.9200      0.00    -0.10       0.00    -0.01
     9   0.9692      0.00     0.13       0.00     0.41
    10   0.9692      0.00    -0.15       0.00    -0.03
    11   0.9693      0.00    -0.21       0.00    -0.21
    12   1.1304      0.00    -0.13       0.00    -0.19
    13   1.1304      0.00    -0.19       0.00    -0.17
    14   1.1740      0.00     0.12       0.00    -0.15
    15   1.1741      0.00     0.14       0.00     0.02
    16   1.7719      0.00     0.25       0.00    -0.12
    17   1.7719      0.00    -0.15       0.00     0.22
    18   1.7720      0.00     0.13       0.00     0.18
    19   1.7720      0.00    -0.17       0.00    -0.22
    20   1.9031      0.00    -0.06       0.00    -0.06
    21   1.9467      0.00     0.13       0.00     0.26
    22   1.9467      0.00    -0.12       0.00     0.06
    23   1.9467      0.00     0.06       0.00     0.08
    24   1.9468      0.00     0.19       0.00     0.03
    25   2.9188      0.00    -0.40       0.00     0.08
    26   2.9188      0.00    -0.15       0.00    -0.08
    27   3.7952      0.00     0.24       0.00     0.09
    28   3.7952      0.00     0.00       0.00     0.18
    29   3.7952      0.00     0.03       0.00     0.08
    30   3.7953      0.00     0.14       0.00     0.07
    31   3.8170      0.00     0.07       0.00    -0.06
    32   3.8171      0.00     0.29       0.00    -0.02
    33   3.8171      0.00    -0.03       0.00    -0.15
    34   3.8964      0.00     0.19       0.00    -0.02
    35   3.8964      0.00     0.05       0.00     0.01
    36   3.8964      0.00     0.05       0.00     0.05
    37   3.9071      0.00     0.03       0.00    -0.05
    38   3.9071      0.00    -0.03       0.00    -0.09
    39   3.9072      0.00     0.06       0.00     0.05
    40   3.9072      0.00     0.01       0.00     0.01
    41   3.9126      0.00     0.06       0.00     0.00
    42   3.9126      0.00     0.08       0.00    -0.05
    43   3.9127      0.00    -0.00       0.00    -0.02
    44   3.9127      0.00     0.10       0.00     0.04
    45   4.0737      0.00    -0.21       0.00     0.21
    46   4.0737      0.00    -0.12       0.00     0.11
    47   4.0738      0.00    -0.10       0.00     0.14
    48   4.0738      0.00    -0.19       0.00     0.01
    49   4.0765      0.00    -0.05       0.00    -0.09
    50   4.0766      0.00     0.00       0.00    -0.06
    51   4.0766      0.00     0.04       0.00    -0.01
    52   4.0766      0.00    -0.07       0.00     0.02
    53   4.1613      0.00     0.08       0.00    -0.01
    54   4.1613      0.00    -0.16       0.00     0.01
    55   4.9011      0.00    -0.08       0.00    -0.04
    56   4.9011      0.00    -0.12       0.00    -0.05
    57   4.9012      0.00    -0.04       0.00    -0.01
    58   4.9012      0.00    -0.10       0.00    -0.09
    59   4.9041      0.00    -0.03       0.00    -0.00
    60   4.9041      0.00     0.22       0.00     0.06
    61   4.9394      0.00    -0.26       0.00    -0.20
    62   5.0185      0.00    -0.04       0.00    -0.06
    63   5.0185      0.00    -0.02       0.00     0.03
    64   5.0185      0.00    -0.06       0.00    -0.02
    65   5.0186      0.00    -0.05       0.00    -0.06
    66   5.0486      0.00     0.03       0.00    -0.07
    67   5.1023      0.00     0.11       0.00    -0.04
    68   5.1023      0.00     0.20       0.00    -0.05
    69   5.1023      0.00     0.09       0.00     0.01
    70   5.1023      0.00     0.18       0.00     0.09
    71   5.1086      0.00    -0.01       0.00    -0.08
    72   5.1086      0.00    -0.02       0.00    -0.05
    73   5.1086      0.00     0.03       0.00     0.01
    74   5.1087      0.00    -0.08       0.00    -0.04
    75   5.2399      0.00    -0.23       0.00    -0.07
    76   5.9497      0.00    -0.10       0.00     0.07
    77   5.9498      0.00    -0.05       0.00     0.05
    78   5.9498      0.00    -0.02       0.00     0.10
    79   5.9498      0.00    -0.03       0.00     0.02
    80   5.9852      0.00     0.18       0.00     0.29
    81   5.9852      0.00    -0.13       0.00     0.02
    82   5.9852      0.00     0.04       0.00     0.07
    83   5.9853      0.00    -0.07       0.00    -0.15
    84   6.0725      0.00     0.04       0.00     0.03
    85   6.0725      0.00    -0.03       0.00    -0.06
    86   6.0997      0.00    -0.01       0.00    -0.06
    87   6.0998      0.00    -0.02       0.00    -0.02
    88   6.0998      0.00     0.01       0.00     0.06
    89   6.0998      0.00    -0.01       0.00    -0.04
    90   6.1681      0.00    -0.08       0.00    -0.13
    91   6.1681      0.00     0.00       0.00    -0.01
    92   6.1682      0.00    -0.04       0.00    -0.03
    93   9.1743      0.00     0.04       0.00     0.01
    94   9.1744      0.00     0.04       0.00    -0.02
    95   9.1744      0.00    -0.03       0.00     0.03
    96   9.1744      0.00     0.03       0.00     0.07
    97   9.2509      0.00    -0.06       0.00    -0.07
    98   9.2509      0.00    -0.07       0.00     0.06
    99   9.2510      0.00     0.08       0.00    -0.17
   100  10.1901      0.00    -0.00       0.00     0.15
   101  10.1901      0.00     0.09       0.00     0.09
   102  10.1902      0.00    -0.11       0.00    -0.03
   103  10.1902      0.00     0.05       0.00     0.07

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.

558168    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        67.321    67.320    67.323
ecceobj         0.732     0.732     0.732
incobj         14.695    14.695    14.695
qmin           17.927    17.616    17.927
qmax          116.661   123.758   116.690
amean          67.375    68.366    67.379
amin           67.217    64.943    67.218
amax           67.593    71.036    67.593
emean           0.731     0.735     0.731
emin            0.726     0.721     0.726
emax            0.733     0.743     0.733
imean          16.205    16.528    16.204
imin           16.120    16.120    16.120
imax           16.292    16.756    16.288
excite_mean     0.782     0.788     0.782
fracstop        0.000     0.013     0.000
cjmean          2.410     2.401     2.410

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       268.8     273.5     268.8
kozaiamp          0.7       5.0       0.7