Orbit Fit and Astrometric record for 500883

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: 500883    
# Created Fri Dec  3 02:07:36 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     73 observations of     73
# Arc:   9.04y
# First observation: 2011/06/06
#  Last observation: 2020/06/21
# Chi-squared of fit:    78.01 DOF:    140 RMS:  0.18
# Min/Max residuals:    -0.71    0.56
# Exact a, adot, b, bdot, g, gdot:
  1.387363E-05  2.267825E-02  3.954882E-06  7.406855E-03  2.529302E-02  6.112498E-03
# 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
    8.381649 -122.017155   -0.298280    0.141501   -0.960867  2455718.963819
# Heliocentric elements and errors
Epoch:              2455718.5000  =  2011/06/06
Mean Anomaly:           82.56695 +/-     0.000
Argument of Peri:      273.27280 +/-     0.000
Long of Asc Node:      214.95463 +/-     0.000
Inclination:            19.85754 +/-     0.000
Eccentricity:         0.25494180 +/-    0.0000
Semi-Major Axis:     39.26534968 +/-    0.0000
Time of Perihelion: 2435106.6774 +/-       0.0
Perihelion:          29.25497080 +/-    0.0000
Aphelion:            49.27572856 +/-    0.0000
Period (y)              246.0495 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -20.99495638 +/-    0.0000
Ecliptic Y          -34.14628615 +/-    0.0000
Ecliptic Z            5.76331240 +/-    0.0000
Ecliptic XDOT         0.00179400 +/-    0.0000
Ecliptic YDOT        -0.00175157 +/-    0.0000
Ecliptic ZDOT         0.00088968 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.49642464 +/-    0.0000
Geocenter to KBO     39.53648304 +/-    0.0000
# Hcoef:  7.36

The following table shows the complete astrometric record for 500883. 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 (500883) followed by the observatory code and reference code for the source of the astrometry.

2011 06  06.463053 15 50 32.277  -11 31 58.49  21.5G 500883    F51  C~42z6      
2012 05  10.505588 15 58 11.657  -11 31 53.90  21.4G 500883    F51  C~42z6      
2012 05  10.516211 15 58 11.644  -11 31 53.85  21.9G 500883    F51  C~42z6      
2013 04  10.59305  16 05 44.228  -11 34 32.42  23.5r 500883    568  C~1XRf      
2013 04  19.46408  16 05 11.678  -11 31 05.88  23.5r 500883    568  C~1XRf      
2013 04  19.51699  16 05 11.462  -11 31 04.57  23.6r 500883    568  C~1XRf      
2013 05  08.441995 16 03 48.253  -11 23 57.60  23.5G 500883    F51  C~42z6      
2013 05  08.45126  16 03 48.186  -11 23 57.48  23.3r 500883    568  C~1XRf      
2013 05  08.470168 16 03 48.121  -11 23 57.24  23.4G 500883    F51  C~42z6      
2013 05  08.484305 16 03 48.038  -11 23 56.87  23.8G 500883    F51  C~42z6      
2013 05  08.49533  16 03 47.978  -11 23 56.51  23.6r 500883    568  C~1XRf      
2013 05  08.53916  16 03 47.764  -11 23 55.65  23.4r 500883    568  C~1XRf      
2013 05  09.54622  16 03 42.955  -11 23 34.03  23.3r 500883    568  C~1XRf      
2013 05  10.55178  16 03 38.128  -11 23 12.73  23.4r 500883    568  C~1XRf      
2013 06  04.42264  16 01 35.992  -11 15 31.64  23.8r 500883    568  C~1XRf      
2013 06  04.427705 16 01 35.982  -11 15 31.46  23.6G 500883    F51  C~42z6      
2013 06  06.42067  16 01 26.360  -11 15 01.70        500883    568  C~1XRf      
2013 06  06.44917  16 01 26.230  -11 15 01.16        500883    568  C~1XRf      
2013 07  02.37291  15 59 34.772  -11 10 27.96  23.5r 500883    568  C~1XRf      
2013 07  04.36382  15 59 27.648  -11 10 16.81  23.5r 500883    568  C~1XRf      
2013 08  01.25882  15 58 18.943  -11 10 15.12  23.6r 500883    568  C~1XRf      
2013 08  01.31670  15 58 18.880  -11 10 15.27  24.0r 500883    568  C~1XRf      
2013 08  02.30664  15 58 17.643  -11 10 20.60  23.7r 500883    568  C~1XRf      
2013 08  05.29659  15 58 14.463  -11 10 38.34  23.5r 500883    568  C~1XRf      
2014 03  06.61642  16 12 06.467  -11 37 53.80  23.7r 500883    568  C~1XRf      
2014 03  07.59105  16 12 06.265  -11 37 35.82  23.5r 500883    568  C~1XRf      
2014 05  01.42971  16 09 42.689  -11 17 33.77  23.4r 500883    568  C~1XRf      
2014 05  01.48091  16 09 42.457  -11 17 32.70  23.3r 500883    568  C~1XRf      
2014 05  01.54140  16 09 42.182  -11 17 31.35  23.6r 500883    568  C~1XRf      
2014 05  04.42726  16 09 29.188  -11 16 28.04  23.8r 500883    568  C~1XRf      
2014 05  04.47771  16 09 28.950  -11 16 27.02  23.6r 500883    568  C~1XRf      
2014 05  04.52933  16 09 28.709  -11 16 25.77  23.2r 500883    568  C~1XRf      
2014 05  07.505690 16 09 14.981  -11 15 21.82  23.2G 500883    F51  C~42z6      
2014 05  22.52578  16 08 02.460  -11 10 22.54  23.4r 500883    568  C~1XRf      
2014 05  23.359754 16 07 58.344  -11 10 07.14  22.9G 500883    F51  C~42z6      
2014 05  23.411201 16 07 58.112  -11 10 06.05  23.6G 500883    F51  C~42z6      
2014 05  23.424105 16 07 58.024  -11 10 06.28  23.3G 500883    F51  C~42z6      
2014 05  23.436953 16 07 57.971  -11 10 06.18  23.0G 500883    F51  C~42z6      
2014 05  23.449814 16 07 57.885  -11 10 05.23  21.9G 500883    F51  C~42z6      
2014 05  25.48500  16 07 47.853  -11 09 29.09  23.2r 500883    568  C~1XRf      
2014 05  28.414791 16 07 33.378  -11 08 38.56  23.5G 500883    F51  C~42z6      
2014 06  24.372837 16 05 28.161  -11 02 49.72  23.8G 500883    F51  C~42z6      
2014 06  24.385662 16 05 28.109  -11 02 49.81  23.3G 500883    F51  C~42z6      
2014 06  24.398487 16 05 28.039  -11 02 49.77  23.7G 500883    F51  C~42z6      
2014 06  24.411287 16 05 27.974  -11 02 49.54  24.3G 500883    F51  C~42z6      
2014 07  01.39490  16 05 00.175  -11 01 58.91  23.6r 500883    568  C~1XRf      
2014 07  18.34503  16 04 05.594  -11 01 09.91  23.5r 500883    568  C~1XRf      
2015 03  22.59933  16 17 04.877  -11 23 13.82  23.4r 500883    568  C~1XRf      
2015 03  30.619488 16 16 49.540  -11 20 19.05  23.5G 500883    F51  C~42z6      
2015 03  31.584914 16 16 47.309  -11 19 57.25  23.1G 500883    F51  C~42z6      
2015 06  15.377504 16 11 26.565  -10 55 25.76  23.8G 500883    F51  C~42z6      
2015 06  23.402983 16 10 50.959  -10 54 06.49  24.1G 500883    F51  C~42z6      
2015 07  14.374200 16 09 33.572  -10 52 26.01  24.4G 500883    F51  C~42z6      
2016 05  29.38051  16 17 58.748  -10 49 50.51  23.7w 500883    568  C~2LSW      
2016 06  03.42065  16 17 34.163  -10 48 35.02  23.5w 500883    568  C~2LSW      
2016 06  28.436630 16 15 40.983  -10 44 17.66  22.7G 500883    F51  C~42z6      
2018 06  08.449399 16 27 30.645  -10 28 26.20  23.5G 500883    F51  C~42z6      
2018 07  04.375480 16 25 36.544  -10 25 04.00  23.5G 500883    F51  C~42z6      
2019 05  30.404774 16 33 19.245  -10 20 34.05  23.1G 500883    F51  C~42z6      
2019 05  30.416840 16 33 19.153  -10 20 34.19  23.1G 500883    F51  C~42z6      
2019 05  30.428919 16 33 19.089  -10 20 33.53  24.3G 500883    F51  C~42z6      
2019 05  30.441017 16 33 19.056  -10 20 34.22  23.4G 500883    F51  C~42z6      
2019 05  31.452187 16 33 14.173  -10 20 19.13  23.4G 500883    F51  C~42z6      
2019 05  31.465111 16 33 14.088  -10 20 18.77  22.8G 500883    F51  C~42z6      
2019 05  31.478056 16 33 14.012  -10 20 18.65  23.5G 500883    F51  C~42z6      
2019 05  31.490955 16 33 13.987  -10 20 18.62  23.4G 500883    F51  C~42z6      
2019 07  04.365628 16 30 40.599  -10 15 21.24  23.7G 500883    F51  C~42z6      
2019 07  04.377544 16 30 40.536  -10 15 21.28  23.1G 500883    F51  C~42z6      
2019 07  04.389434 16 30 40.485  -10 15 20.92  23.3G 500883    F51  C~42z6      
2019 07  04.401290 16 30 40.402  -10 15 21.43  23.7G 500883    F51  C~42z6      
2019 07  24.373549 16 29 34.562  -10 15 30.70  23.6G 500883    F51  C~42z6      
2020 06  17.390098 16 36 50.087  -10 06 53.07  23.4G 500883    F51  C~42z6      
2020 06  21.353510 16 36 32.050  -10 06 23.10  22.5G 500883    F51  C~42z6      

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     0.09       0.00     0.12
     2   0.9282      0.00    -0.04       0.00     0.20
     3   0.9283      0.00     0.56       0.00     0.02
     4   1.8457      0.00    -0.01       0.00    -0.00
     5   1.8700      0.00     0.01       0.00    -0.05
     6   1.8701      0.00    -0.03       0.00     0.03
     7   1.9219      0.00     0.23       0.00     0.11
     8   1.9219      0.00    -0.10       0.00     0.02
     9   1.9220      0.00     0.30       0.00    -0.14
    10   1.9220      0.00     0.08       0.00    -0.07
    11   1.9221      0.00    -0.02       0.00     0.05
    12   1.9222      0.00    -0.04       0.00    -0.04
    13   1.9249      0.00    -0.10       0.00     0.02
    14   1.9277      0.00    -0.15       0.00    -0.05
    15   1.9958      0.00    -0.09       0.00    -0.06
    16   1.9958      0.00     0.13       0.00     0.04
    17   2.0013      0.00    -0.23       0.00    -0.29
    18   2.0013      0.00    -0.09       0.00    -0.18
    19   2.0723      0.00     0.05       0.00     0.04
    20   2.0778      0.00     0.09       0.00     0.01
    21   2.1541      0.00    -0.30       0.00     0.05
    22   2.1543      0.00    -0.05       0.00     0.19
    23   2.1570      0.00    -0.11       0.00     0.05
    24   2.1652      0.00    -0.10       0.00     0.08
    25   2.7492      0.00     0.15       0.00     0.03
    26   2.7519      0.00     0.06       0.00    -0.04
    27   2.9020      0.00    -0.07       0.00    -0.15
    28   2.9022      0.00    -0.07       0.00    -0.21
    29   2.9023      0.00    -0.08       0.00    -0.19
    30   2.9102      0.00    -0.02       0.00    -0.04
    31   2.9104      0.00    -0.07       0.00    -0.11
    32   2.9105      0.00    -0.09       0.00     0.02
    33   2.9187      0.00     0.02       0.00     0.03
    34   2.9598      0.00     0.07       0.00    -0.06
    35   2.9621      0.00    -0.16       0.00     0.08
    36   2.9622      0.00     0.23       0.00     0.24
    37   2.9622      0.00    -0.12       0.00    -0.22
    38   2.9623      0.00     0.06       0.00    -0.36
    39   2.9623      0.00    -0.27       0.00     0.36
    40   2.9679      0.00     0.05       0.00     0.00
    41   2.9759      0.00    -0.23       0.00    -0.18
    42   3.0497      0.00     0.24       0.00     0.21
    43   3.0498      0.00     0.28       0.00     0.01
    44   3.0498      0.00     0.05       0.00    -0.06
    45   3.0498      0.00    -0.11       0.00     0.06
    46   3.0689      0.00    -0.09       0.00    -0.00
    47   3.1154      0.00     0.03       0.00    -0.03
    48   3.7923      0.00    -0.02       0.00     0.10
    49   3.8143      0.00    -0.06       0.00    -0.12
    50   3.8169      0.00    -0.22       0.00     0.19
    51   4.0244      0.00     0.06       0.00    -0.19
    52   4.0464      0.00     0.18       0.00    -0.13
    53   4.1038      0.00    -0.21       0.00     0.53
    54   4.9799      0.00     0.02       0.00    -0.01
    55   4.9937      0.00     0.04       0.00     0.02
    56   5.0622      0.00     0.42       0.00     0.24
    57   7.0061      0.00    -0.14       0.00    -0.06
    58   7.0771      0.00     0.35       0.00     0.09
    59   7.9807      0.00     0.24       0.00    -0.02
    60   7.9807      0.00    -0.25       0.00    -0.33
    61   7.9807      0.00    -0.32       0.00     0.15
    62   7.9808      0.00     0.08       0.00    -0.71
    63   7.9835      0.00     0.25       0.00    -0.06
    64   7.9836      0.00    -0.08       0.00     0.12
    65   7.9836      0.00    -0.26       0.00     0.06
    66   7.9836      0.00     0.32       0.00    -0.10
    67   8.0764      0.00     0.33       0.00     0.09
    68   8.0764      0.00     0.10       0.00     0.01
    69   8.0765      0.00     0.05       0.00     0.33
    70   8.0765      0.00    -0.49       0.00    -0.21
    71   8.1312      0.00     0.13       0.00     0.07
    72   9.0320      0.00    -0.01       0.00     0.28
    73   9.0428      0.00    -0.35       0.00     0.14

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.

500883    quality flag:3

Type:           3:2E      3:2E      3:2E
Type:          6:4II     6:4II     6:4II

axisobj        39.158    39.158    39.158
ecceobj         0.255     0.255     0.255
incobj         19.880    19.880    19.880
qmin           28.254    28.256    28.253
qmax           51.058    51.059    51.055
amean          39.454    39.454    39.454
amin           39.099    39.099    39.099
amax           39.900    39.900    39.899
emean           0.252     0.252     0.252
emin            0.217     0.217     0.217
emax            0.281     0.281     0.281
imean          20.458    20.458    20.458
imin           19.279    19.279    19.280
imax           21.437    21.438    21.437
excite_mean     0.431     0.431     0.431
fracstop        1.000     1.000     1.000
cjmean          2.838     2.838     2.838

libcent 0       179.6     179.4     179.8
libamp  0        34.0      33.9      33.9
libcent 1       180.3     180.4     180.0
libamp  1       102.4     101.7     103.0
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       270.2     270.2     270.2
kozaiamp         25.7      25.7      25.7