Orbit Fit and Astrometric record for 500831

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: 500831    
# Created Fri Dec 15 02:36:51 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   34 observations of   34
# Arc:   4.22y
# First observation: 2013/03/07
#  Last observation: 2017/05/28
# Chi-squared of fit:    29.52 DOF:   62 RMS:  0.16
# Min/Max residuals:    -0.24    0.90
# Exact a, adot, b, bdot, g, gdot:
  1.569090E-05  2.458953E-02  2.539880E-06  3.217508E-03  2.501889E-02  1.282287E-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
    0.083826 -142.239262    0.768060    0.000960   -0.629102  2456359.034468
# Heliocentric elements and errors
Epoch:              2456358.5000  =  2013/03/07
Mean Anomaly:           71.55826 +/-     0.000
Argument of Peri:      285.09823 +/-     0.000
Long of Asc Node:      216.04476 +/-     0.000
Inclination:             7.46533 +/-     0.000
Eccentricity:         0.03609909 +/-    0.0000
Semi-Major Axis:     41.02346555 +/-    0.0000
Time of Perihelion: 2437281.7584 +/-       0.0
Perihelion:          39.54255567 +/-    0.0000
Aphelion:            42.50437543 +/-    0.0000
Period (y)              262.7585 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -32.56551269 +/-    0.0000
Ecliptic Y          -24.25210985 +/-    0.0000
Ecliptic Z            0.05858971 +/-    0.0000
Ecliptic XDOT         0.00153101 +/-    0.0000
Ecliptic YDOT        -0.00221226 +/-    0.0000
Ecliptic ZDOT         0.00035244 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.60392994 +/-    0.0000
Geocenter to KBO     39.96979699 +/-    0.0000
# Hcoef:  8.25

The following table shows the complete astrometric record for 500831. 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 (500831) followed by the observatory code and reference code for the source of the astrometry.

2013 03  07.53369  14 21 42.747  -14 01 08.14  24.0r 500831    568  C~1XRW      
2013 03  07.64267  14 21 42.445  -14 01 06.35  24.3r 500831    568  C~1XRW      
2013 04  04.53472  14 20 01.656  -13 51 45.96  24.5r 500831    568  C~1XRW      
2013 04  07.39521  14 19 49.033  -13 50 36.38  24.3r 500831    568  C~1XRW      
2013 04  07.43903  14 19 48.818  -13 50 35.48  24.5r 500831    568  C~1XRW      
2013 04  08.42769  14 19 44.359  -13 50 11.16  24.2r 500831    568  C~1XRW      
2013 04  08.47292  14 19 44.145  -13 50 10.26  24.3r 500831    568  C~1XRW      
2013 04  09.37434  14 19 40.084  -13 49 47.82  24.1r 500831    568  C~1XRW      
2013 04  09.41746  14 19 39.890  -13 49 46.72  23.9r 500831    568  C~1XRW      
2013 04  09.46062  14 19 39.688  -13 49 45.73  24.0r 500831    568  C~1XRW      
2013 05  11.46227  14 17 07.891  -13 35 57.09  24.2r 500831    568  C~1XRW      
2013 05  12.46349  14 17 03.252  -13 35 31.73  24.0r 500831    568  C~1XRW      
2013 06  12.35950  14 15 01.110  -13 24 12.71  24.5r 500831    568  C~1XRW      
2013 06  12.40439  14 15 00.960  -13 24 11.94  24.4r 500831    568  C~1XRW      
2013 07  04.31926  14 14 12.344  -13 19 24.65  24.1r 500831    568  C~1XRW      
2013 07  06.32704  14 14 09.860  -13 19 08.60  24.5r 500831    568  C~1XRW      
2013 08  02.25463  14 14 12.758  -13 18 38.10  24.5r 500831    568  C~1XRW      
2014 02  03.59026  14 28 02.026  -14 21 50.76  24.3r 500831    568  C~1XRW      
2014 02  24.60510  14 27 50.089  -14 20 04.28  24.4r 500831    568  C~1XRW      
2014 02  25.58815  14 27 48.500  -14 19 54.35  24.5r 500831    568  C~1XRW      
2014 02  28.52057  14 27 43.228  -14 19 21.95  24.1r 500831    568  C~1XRW      
2014 02  28.53610  14 27 43.196  -14 19 21.80  24.1r 500831    568  C~1XRW      
2014 05  22.44598  14 22 05.924  -13 48 48.83  24.3r 500831    568  C~1XRW      
2014 05  25.43819  14 21 53.087  -13 47 39.71  23.8r 500831    568  C~1XRW      
2015 01  26.62763  14 33 33.889  -14 37 22.55  24.2r 500831    568  C~1XRW      
2016 05  06.34492  14 34 53.329  -14 28 04.54  23.7r 500831    568  C~2KOF      
2016 05  06.41084  14 34 53.001  -14 28 02.86  24.0r 500831    568  C~2KOF      
2016 05  29.35189  14 33 08.129  -14 19 06.59  24.3w 500831    568  C~2KOF      
2017 01  31.65143  14 45 01.350  -15 07 47.51  24.4w 500831    568  C~2KOF      
2017 02  03.64785  14 45 04.430  -15 07 52.28        500831    568  C~2KOF      
2017 02  23.64639  14 45 01.971  -15 06 38.67        500831    568  C~2KOF      
2017 03  30.53576  14 43 31.101  -14 58 03.48  24.4w 500831    568  C~2KOF      
2017 05  28.35383  14 39 01.025  -14 35 18.83  24.2r 500831    568  C~2KOF      
2017 05  28.41896  14 39 00.739  -14 35 17.39  24.3r 500831    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    -0.18       0.00     0.90
  2   0.0003      0.00    -0.06       0.00     0.02
  3   0.0767      0.00    -0.05       0.00    -0.08
  4   0.0845      0.00     0.33       0.00     0.23
  5   0.0846      0.00     0.10       0.00     0.06
  6   0.0873      0.00    -0.10       0.00     0.08
  7   0.0874      0.00    -0.19       0.00    -0.14
  8   0.0899      0.00     0.03       0.00    -0.02
  9   0.0900      0.00     0.11       0.00     0.02
 10   0.0901      0.00     0.08       0.00    -0.06
 11   0.1778      0.00     0.15       0.00    -0.19
 12   0.1805      0.00     0.06       0.00    -0.23
 13   0.2651      0.00    -0.07       0.00    -0.08
 14   0.2652      0.00    -0.20       0.00    -0.10
 15   0.3252      0.00     0.20       0.00    -0.07
 16   0.3307      0.00    -0.24       0.00    -0.02
 17   0.4044      0.00     0.45       0.00     0.12
 18   0.9119      0.00     0.10       0.00    -0.11
 19   0.9694      0.00     0.12       0.00     0.06
 20   0.9721      0.00     0.14       0.00    -0.01
 21   0.9801      0.00     0.05       0.00     0.01
 22   0.9802      0.00     0.03       0.00    -0.02
 23   1.2072      0.00     0.11       0.00     0.07
 24   1.2153      0.00    -0.08       0.00     0.10
 25   1.8894      0.00     0.01       0.00     0.26
 26   3.1644      0.00    -0.00       0.00    -0.02
 27   3.1646      0.00    -0.06       0.00     0.04
 28   3.2274      0.00     0.05       0.00     0.08
 29   3.9045      0.00    -0.04       0.00    -0.01
 30   3.9127      0.00    -0.04       0.00    -0.14
 31   3.9675      0.00     0.10       0.00    -0.08
 32   4.0630      0.00    -0.06       0.00     0.01
 33   4.2240      0.00     0.08       0.00    -0.07
 34   4.2242      0.00     0.08       0.00    -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.

500831    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        40.874    40.874    40.874
ecceobj         0.033     0.033     0.033
incobj          7.476     7.476     7.476
qmin           37.308    37.136    37.299
qmax           45.405    45.516    45.406
amean          41.178    41.175    41.178
amin           40.801    40.821    40.802
amax           41.577    41.575    41.574
emean           0.056     0.057     0.058
emin            0.014     0.014     0.014
emax            0.092     0.096     0.092
imean           8.710     8.754     8.691
imin            6.371     6.439     6.314
imax           10.929    10.929    10.930
excite_mean     0.163     0.165     0.164
fracstop        1.000     1.000     1.000
cjmean          3.038     3.038     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       178.8     179.3     178.3
kozaiamp        180.0     180.0     180.0