Orbit Fit and Astrometric record for 500839

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: 500839    
# Created Mon Dec 18 02:36:52 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   44 observations of   44
# Arc:   4.30y
# First observation: 2013/02/08
#  Last observation: 2017/05/30
# Chi-squared of fit:    26.11 DOF:   82 RMS:  0.14
# Min/Max residuals:    -0.33    0.77
# Exact a, adot, b, bdot, g, gdot:
  1.733970E-05  2.528912E-02  8.207894E-07 -2.173097E-03  2.493819E-02  2.104987E-05
# 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
    1.149638 -145.469882    0.950179    0.005317   -0.262567  2456332.119468
# Heliocentric elements and errors
Epoch:              2456332.5000  =  2013/02/09
Mean Anomaly:          340.73489 +/-     0.000
Argument of Peri:      188.54691 +/-     0.000
Long of Asc Node:       46.28724 +/-     0.000
Inclination:             5.02342 +/-     0.000
Eccentricity:         0.05991348 +/-    0.0000
Semi-Major Axis:     42.77145034 +/-    0.0000
Time of Perihelion: 2461800.1195 +/-       0.0
Perihelion:          40.20886385 +/-    0.0000
Aphelion:            45.33403684 +/-    0.0000
Period (y)              279.7301 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -33.78166670 +/-    0.0000
Ecliptic Y          -22.08934523 +/-    0.0000
Ecliptic Z            0.80456609 +/-    0.0000
Ecliptic XDOT         0.00156170 +/-    0.0000
Ecliptic YDOT        -0.00229033 +/-    0.0000
Ecliptic ZDOT        -0.00023835 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.37064022 +/-    0.0000
Geocenter to KBO     40.09915600 +/-    0.0000
# Hcoef:  7.79

The following table shows the complete astrometric record for 500839. 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 (500839) followed by the observatory code and reference code for the source of the astrometry.

2013 02  08.61869  14 10 38.055  -11 56 52.48  24.0r 500839    568  C~1XRZ      
2013 03  07.54942  14 09 50.179  -11 52 32.35  23.8r 500839    568  C~1XRZ      
2013 03  07.60676  14 09 50.012  -11 52 31.22  23.5r 500839    568  C~1XRZ      
2013 04  04.42184  14 08 04.078  -11 43 22.45  23.6r 500839    568  C~1XRZ      
2013 04  04.46233  14 08 03.890  -11 43 21.49  23.7r 500839    568  C~1XRZ      
2013 04  04.50260  14 08 03.714  -11 43 20.40  23.6r 500839    568  C~1XRZ      
2013 04  04.55066  14 08 03.494  -11 43 19.52  23.9r 500839    568  C~1XRZ      
2013 04  05.55312  14 07 58.970  -11 42 56.61  24.1r 500839    568  C~1XRZ      
2013 04  05.55702  14 07 58.951  -11 42 56.14  23.6r 500839    568  C~1XRZ      
2013 04  06.59497  14 07 54.215  -11 42 32.13  23.2r 500839    568  C~1XRZ      
2013 04  07.41104  14 07 50.483  -11 42 12.80  23.1r 500839    568  C~1XRZ      
2013 04  07.45481  14 07 50.289  -11 42 11.94  23.6r 500839    568  C~1XRZ      
2013 04  08.39569  14 07 45.963  -11 41 49.83  23.2r 500839    568  C~1XRZ      
2013 04  08.44342  14 07 45.732  -11 41 48.63  23.1r 500839    568  C~1XRZ      
2013 04  08.48862  14 07 45.523  -11 41 47.70  24.0r 500839    568  C~1XRZ      
2013 04  09.39004  14 07 41.350  -11 41 26.27  23.8r 500839    568  C~1XRZ      
2013 04  09.43325  14 07 41.143  -11 41 25.23  23.5r 500839    568  C~1XRZ      
2013 04  09.47643  14 07 40.937  -11 41 24.40  23.5r 500839    568  C~1XRZ      
2013 05  11.42609  14 05 08.834  -11 28 42.62  23.7r 500839    568  C~1XRZ      
2013 05  12.42771  14 05 04.270  -11 28 20.28  23.4r 500839    568  C~1XRZ      
2013 06  13.26550  14 03 03.779  -11 18 51.63  23.8r 500839    568  C~1XRZ      
2013 06  13.30597  14 03 03.662  -11 18 51.24  23.7r 500839    568  C~1XRZ      
2013 07  04.28711  14 02 22.491  -11 16 10.51  24.2r 500839    568  C~1XRZ      
2013 07  06.29463  14 02 20.521  -11 16 06.00  23.9r 500839    568  C~1XRZ      
2014 02  24.55846  14 15 45.161  -12 31 11.55  23.8r 500839    568  C~1XRZ      
2014 02  27.63879  14 15 38.934  -12 30 39.35  23.7r 500839    568  C~1XRZ      
2014 03  27.45320  14 14 09.661  -12 23 04.66  24.1r 500839    568  C~1XRZ      
2014 03  28.42997  14 14 05.611  -12 22 44.46  23.7r 500839    568  C~1XRZ      
2014 03  28.46901  14 14 05.436  -12 22 43.60  23.9r 500839    568  C~1XRZ      
2014 04  04.44681  14 13 35.343  -12 20 12.72  23.4r 500839    568  C~1XRZ      
2014 04  04.48662  14 13 35.163  -12 20 11.81  23.8r 500839    568  C~1XRZ      
2014 04  05.39741  14 13 31.085  -12 19 51.53  23.8r 500839    568  C~1XRZ      
2014 04  05.57455  14 13 30.275  -12 19 47.42  23.8r 500839    568  C~1XRZ      
2014 05  22.38158  14 09 50.976  -12 01 53.85  23.6r 500839    568  C~1XRZ      
2014 05  22.46154  14 09 50.628  -12 01 52.17  23.9r 500839    568  C~1XRZ      
2014 05  25.45403  14 09 38.146  -12 00 53.25  23.7r 500839    568  C~1XRZ      
2014 06  26.31316  14 07 59.463  -11 53 33.37  23.9r 500839    568  C~1XRZ      
2014 07  18.28369  14 07 38.702  -11 52 45.42  24.0r 500839    568  C~1XRZ      
2015 01  26.61744  14 21 24.823  -13 07 56.84  23.9r 500839    568  C~1XRZ      
2015 01  26.63271  14 21 24.852  -13 07 57.01  23.8r 500839    568  C~1XRZ      
2015 03  21.61206  14 20 05.294  -13 01 18.64  23.7r 500839    568  C~2KOG      
2017 05  25.46246  14 26 17.478  -13 49 42.70  23.7r 500839    568  C~2KOG      
2017 05  30.28159  14 25 57.110  -13 48 11.22  23.6r 500839    568  C~2KOG      
2017 05  30.34663  14 25 56.842  -13 48 10.03  23.5r 500839    568  C~2KOG      

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    -0.17       0.00     0.77
  2   0.0737      0.00    -0.13       0.00    -0.16
  3   0.0739      0.00    -0.05       0.00     0.09
  4   0.1500      0.00    -0.04       0.00    -0.04
  5   0.1502      0.00    -0.07       0.00    -0.01
  6   0.1503      0.00     0.06       0.00     0.15
  7   0.1504      0.00     0.07       0.00    -0.08
  8   0.1531      0.00     0.16       0.00    -0.33
  9   0.1532      0.00     0.15       0.00     0.05
 10   0.1560      0.00     0.04       0.00    -0.09
 11   0.1582      0.00    -0.09       0.00     0.17
 12   0.1583      0.00     0.08       0.00     0.00
 13   0.1609      0.00     0.17       0.00    -0.01
 14   0.1611      0.00     0.07       0.00     0.07
 15   0.1612      0.00     0.13       0.00    -0.06
 16   0.1636      0.00     0.12       0.00     0.06
 17   0.1638      0.00     0.09       0.00     0.09
 18   0.1639      0.00     0.07       0.00    -0.11
 19   0.2514      0.00    -0.05       0.00    -0.04
 20   0.2541      0.00    -0.02       0.00    -0.08
 21   0.3413      0.00     0.24       0.00    -0.05
 22   0.3414      0.00     0.24       0.00    -0.16
 23   0.3988      0.00    -0.01       0.00     0.00
 24   0.4043      0.00     0.01       0.00    -0.06
 25   1.0430      0.00     0.15       0.00     0.04
 26   1.0514      0.00     0.07       0.00    -0.05
 27   1.1275      0.00     0.51       0.00     0.15
 28   1.1302      0.00     0.22       0.00     0.06
 29   1.1303      0.00     0.07       0.00     0.11
 30   1.1494      0.00     0.10       0.00     0.03
 31   1.1495      0.00     0.11       0.00     0.05
 32   1.1520      0.00    -0.03       0.00    -0.06
 33   1.1525      0.00    -0.01       0.00     0.07
 34   1.2807      0.00     0.04       0.00     0.01
 35   1.2809      0.00    -0.00       0.00     0.07
 36   1.2891      0.00    -0.04       0.00    -0.01
 37   1.3763      0.00    -0.04       0.00     0.10
 38   1.4365      0.00    -0.09       0.00     0.05
 39   1.9630      0.00    -0.07       0.00     0.00
 40   1.9631      0.00     0.14       0.00    -0.09
 41   2.1109      0.00    -0.06       0.00    -0.04
 42   4.2898      0.00     0.01       0.00    -0.08
 43   4.3030      0.00    -0.04       0.00    -0.05
 44   4.3032      0.00     0.04       0.00    -0.05

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.

500839    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        42.614    42.614    42.614
ecceobj         0.058     0.058     0.058
incobj          5.029     5.029     5.029
qmin           39.673    39.682    39.677
qmax           46.403    46.354    46.417
amean          42.925    42.925    42.925
amin           42.594    42.600    42.594
amax           43.274    43.267    43.279
emean           0.052     0.052     0.052
emin            0.034     0.034     0.033
emax            0.072     0.072     0.072
imean           3.492     3.492     3.492
imin            2.550     2.549     2.550
imax            4.493     4.493     4.493
excite_mean     0.080     0.080     0.080
fracstop        1.000     1.000     1.000
cjmean          3.081     3.081     3.081

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       183.0     183.0     182.8
kozaiamp        179.9     179.9     179.9