Orbit Fit and Astrometric record for 500829

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: 500829    
# Created Fri Dec 15 02:36:51 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   41 observations of   41
# Arc:   3.99y
# First observation: 2013/04/04
#  Last observation: 2017/03/31
# Chi-squared of fit:    30.90 DOF:   76 RMS:  0.15
# Min/Max residuals:    -0.40    0.71
# Exact a, adot, b, bdot, g, gdot:
  1.319950E-05  1.689373E-02 -2.055905E-06 -3.589154E-03  2.087225E-02  3.639308E-04
# 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
    1.829810 -147.171683    0.311030    0.030434   -0.951591  2456386.914608
# Heliocentric elements and errors
Epoch:              2456386.5000  =  2013/04/04
Mean Anomaly:          172.75245 +/-     0.000
Argument of Peri:      356.79411 +/-     0.000
Long of Asc Node:       40.84046 +/-     0.000
Inclination:            12.13230 +/-     0.000
Eccentricity:         0.15577855 +/-    0.0000
Semi-Major Axis:     42.30964532 +/-    0.0000
Time of Perihelion: 2408149.6177 +/-       0.0
Perihelion:          35.71871000 +/-    0.0000
Aphelion:            48.90058064 +/-    0.0000
Period (y)              275.2119 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -41.20621506 +/-    0.0000
Ecliptic Y          -26.21295261 +/-    0.0000
Ecliptic Z            1.52974290 +/-    0.0000
Ecliptic XDOT         0.00114232 +/-    0.0000
Ecliptic YDOT        -0.00189570 +/-    0.0000
Ecliptic ZDOT        -0.00046889 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   48.86113083 +/-    0.0000
Geocenter to KBO     47.91052157 +/-    0.0000
# Hcoef:  7.43

The following table shows the complete astrometric record for 500829. 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 (500829) followed by the observatory code and reference code for the source of the astrometry.

2013 04  04.41383  14 05 02.280  -10 44 00.05  24.0r 500829    568  C~1XRV      
2013 04  04.45396  14 05 02.118  -10 43 59.14  23.8r 500829    568  C~1XRV      
2013 04  04.49439  14 05 01.981  -10 43 58.46  24.4r 500829    568  C~1XRV      
2013 04  05.53143  14 04 57.917  -10 43 38.32  23.5r 500829    568  C~1XRV      
2013 04  05.53531  14 04 57.922  -10 43 38.44  24.0r 500829    568  C~1XRV      
2013 04  06.58684  14 04 53.782  -10 43 17.71  23.9r 500829    568  C~1XRV      
2013 05  12.41931  14 02 28.219  -10 31 36.59  24.2r 500829    568  C~1XRV      
2013 06  13.29820  14 00 44.620  -10 24 09.90        500829    568  C~1XRV      
2013 07  04.29102  14 00 08.001  -10 22 19.48  24.3r 500829    568  C~1XRV      
2013 07  06.29852  14 00 06.117  -10 22 18.18  24.3r 500829    568  C~1XRV      
2014 02  25.51607  14 10 22.638  -11 24 50.51  24.1r 500829    568  C~1XRV      
2014 02  25.55969  14 10 22.567  -11 24 49.86  24.3r 500829    568  C~1XRV      
2014 02  25.60433  14 10 22.470  -11 24 49.33  24.3r 500829    568  C~1XRV      
2014 02  27.62682  14 10 18.493  -11 24 29.12  24.3r 500829    568  C~1XRV      
2014 03  27.41673  14 08 58.407  -11 17 47.38  24.2r 500829    568  C~1XRV      
2014 03  28.41797  14 08 54.816  -11 17 29.94  24.4r 500829    568  C~1XRV      
2014 03  28.45726  14 08 54.679  -11 17 29.03  24.3r 500829    568  C~1XRV      
2014 04  29.33023  14 06 47.193  -11 07 11.06  24.2r 500829    568  C~1XRV      
2014 04  29.33527  14 06 47.162  -11 07 10.83  24.1r 500829    568  C~1XRV      
2014 04  29.37062  14 06 47.019  -11 07 10.19  24.1r 500829    568  C~1XRV      
2014 04  29.37566  14 06 47.009  -11 07 10.25  24.3r 500829    568  C~1XRV      
2014 04  29.41097  14 06 46.855  -11 07 09.51  24.2r 500829    568  C~1XRV      
2014 04  29.41601  14 06 46.835  -11 07 09.51  24.4r 500829    568  C~1XRV      
2014 05  22.40174  14 05 16.630  -11 00 13.61  24.1r 500829    568  C~1XRV      
2014 05  28.37385  14 04 55.810  -10 58 42.37  24.2r 500829    568  C~1XRV      
2014 06  26.30540  14 03 41.480  -10 53 52.30        500829    568  C~1XRV      
2015 01  26.65311  14 14 07.267  -11 57 10.76  24.3r 500829    568  C~1XRV      
2015 04  19.41871  14 10 55.695  -11 41 44.53  24.2r 500829    568  C~2KOF      
2015 04  19.48487  14 10 55.436  -11 41 43.39  23.7r 500829    568  C~2KOF      
2015 04  27.40797  14 10 22.562  -11 39 07.79  24.3r 500829    568  C~2KOF      
2016 02  04.64352  14 17 33.357  -12 27 44.39  24.5w 500829    568  C~2KOF      
2016 02  11.62203  14 17 30.769  -12 27 34.59  24.6w 500829    568  C~2KOF      
2016 03  11.62923  14 16 40.000  -12 23 36.22  24.2w 500829    568  C~2KOF      
2016 03  12.50183  14 16 37.604  -12 23 24.73  24.2w 500829    568  C~2KOF      
2016 04  03.49791  14 15 23.846  -12 17 34.41  24.2w 500829    568  C~2KOF      
2016 04  09.47907  14 15 00.536  -12 15 44.04  24.2w 500829    568  C~2KOF      
2017 01  31.64679  14 20 58.230  -12 57 53.40  24.9w 500829    568  C~2KOF      
2017 02  03.64338  14 20 58.630  -12 57 57.37        500829    568  C~2KOF      
2017 02  23.64186  14 20 42.616  -12 56 53.26        500829    568  C~2KOF      
2017 03  28.58864  14 19 14.806  -12 50 08.90        500829    568  C~2KOF      
2017 03  31.46997  14 19 04.383  -12 49 20.37  24.2w 500829    568  C~2KOF      

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    -0.16       0.00     0.71
  2   0.0001      0.00    -0.13       0.00     0.02
  3   0.0002      0.00     0.22       0.00    -0.08
  4   0.0031      0.00    -0.04       0.00    -0.10
  5   0.0031      0.00     0.26       0.00    -0.30
  6   0.0059      0.00     0.15       0.00    -0.12
  7   0.1041      0.00     0.00       0.00     0.15
  8   0.1913      0.00     0.09       0.00     0.06
  9   0.2488      0.00     0.02       0.00     0.23
 10   0.2543      0.00    -0.04       0.00     0.10
 11   0.8956      0.00    -0.05       0.00    -0.14
 12   0.8957      0.00     0.17       0.00     0.10
 13   0.8958      0.00     0.03       0.00     0.20
 14   0.9013      0.00     0.01       0.00     0.13
 15   0.9774      0.00    -0.40       0.00     0.11
 16   0.9802      0.00    -0.10       0.00    -0.32
 17   0.9803      0.00     0.03       0.00    -0.11
 18   1.0675      0.00     0.12       0.00    -0.01
 19   1.0675      0.00    -0.02       0.00     0.12
 20   1.0676      0.00     0.06       0.00     0.08
 21   1.0677      0.00     0.23       0.00    -0.08
 22   1.0678      0.00     0.14       0.00    -0.03
 23   1.0678      0.00     0.16       0.00    -0.13
 24   1.1307      0.00     0.25       0.00     0.12
 25   1.1471      0.00    -0.01       0.00    -0.05
 26   1.2263      0.00     0.01       0.00    -0.06
 27   1.8131      0.00     0.03       0.00     0.03
 28   2.0397      0.00    -0.33       0.00    -0.00
 29   2.0399      0.00    -0.04       0.00    -0.16
 30   2.0616      0.00     0.20       0.00     0.10
 31   2.8370      0.00     0.04       0.00    -0.05
 32   2.8561      0.00     0.11       0.00    -0.01
 33   2.9356      0.00    -0.10       0.00    -0.00
 34   2.9380      0.00     0.12       0.00    -0.02
 35   2.9982      0.00     0.09       0.00    -0.12
 36   3.0146      0.00     0.27       0.00     0.09
 37   3.8282      0.00    -0.05       0.00    -0.10
 38   3.8364      0.00     0.06       0.00     0.12
 39   3.8911      0.00    -0.02       0.00    -0.04
 40   3.9813      0.00    -0.06       0.00    -0.06
 41   3.9892      0.00    -0.03       0.00     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.

500829    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        42.167    42.167    42.167
ecceobj         0.159     0.159     0.159
incobj         12.155    12.155    12.155
qmin           34.674    34.676    34.679
qmax           50.874    50.779    50.895
amean          42.525    42.496    42.529
amin           42.073    42.007    42.069
amax           42.943    42.943    42.942
emean           0.109     0.138     0.116
emin            0.064     0.108     0.074
emax            0.185     0.184     0.185
imean           8.939     9.163     8.994
imin            7.387     7.105     7.339
imax           11.624    11.624    11.624
excite_mean     0.191     0.211     0.196
fracstop        1.000     1.000     1.000
cjmean          3.040     3.030     3.038

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       178.6     177.9     180.0
kozaiamp        180.0     180.0     179.9