Orbit Fit and Astrometric record for 500836

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: 500836    
# Created Sat Dec 16 02:36:54 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   34 observations of   34
# Arc:   4.14y
# First observation: 2013/04/04
#  Last observation: 2017/05/24
# Chi-squared of fit:    23.06 DOF:   62 RMS:  0.15
# Min/Max residuals:    -0.21    0.78
# Exact a, adot, b, bdot, g, gdot:
  1.527967E-05  2.476539E-02 -9.167833E-07 -6.981250E-04  2.453938E-02  2.656687E-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
    2.418939 -145.162407    0.343832    0.039736   -0.939898  2456386.938478
# Heliocentric elements and errors
Epoch:              2456386.5000  =  2013/04/04
Mean Anomaly:           43.49821 +/-     0.000
Argument of Peri:       68.69288 +/-     0.000
Long of Asc Node:       90.40379 +/-     0.000
Inclination:             2.84987 +/-     0.000
Eccentricity:         0.13199046 +/-    0.0000
Semi-Major Axis:     45.62276753 +/-    0.0000
Time of Perihelion: 2442786.4749 +/-       0.0
Perihelion:          39.60099755 +/-    0.0000
Aphelion:            51.64453750 +/-    0.0000
Period (y)              308.1631 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -34.38492473 +/-    0.0000
Ecliptic Y          -23.51141862 +/-    0.0000
Ecliptic Z            1.71991132 +/-    0.0000
Ecliptic XDOT         0.00132635 +/-    0.0000
Ecliptic YDOT        -0.00243850 +/-    0.0000
Ecliptic ZDOT        -0.00006517 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.69007676 +/-    0.0000
Geocenter to KBO     40.75077993 +/-    0.0000
# Hcoef:  7.43

The following table shows the complete astrometric record for 500836. 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 (500836) followed by the observatory code and reference code for the source of the astrometry.

2013 04  04.43770  14 13 32.684  -10 51 14.07  23.3r 500836    568  C~1XRY      
2013 04  04.47824  14 13 32.494  -10 51 13.30  23.6r 500836    568  C~1XRY      
2013 04  04.51865  14 13 32.310  -10 51 12.37  23.4r 500836    568  C~1XRY      
2013 04  06.61093  14 13 23.256  -10 50 23.36  23.5r 500836    568  C~1XRY      
2013 04  08.41181  14 13 15.383  -10 49 40.84  23.5r 500836    568  C~1XRY      
2013 05  11.44582  14 10 44.116  -10 36 43.47  22.7r 500836    568  C~1XRY      
2013 05  12.44355  14 10 39.702  -10 36 21.78  23.5r 500836    568  C~1XRY      
2013 06  13.32253  14 08 41.309  -10 27 16.76  24.1r 500836    568  C~1XRY      
2013 07  04.30285  14 07 59.494  -10 24 50.67  23.5r 500836    568  C~1XRY      
2013 07  06.31139  14 07 57.340  -10 24 47.22  23.6r 500836    568  C~1XRY      
2014 02  24.58563  14 20 58.060  -11 33 11.90  23.6r 500836    568  C~1XRY      
2014 02  25.55523  14 20 56.391  -11 33 00.67  23.6r 500836    568  C~1XRY      
2014 02  28.51669  14 20 50.762  -11 32 23.83  23.7r 500836    568  C~1XRY      
2014 04  04.41916  14 18 57.030  -11 21 37.32  23.4r 500836    568  C~1XRY      
2014 04  04.45865  14 18 56.863  -11 21 36.45  23.6r 500836    568  C~1XRY      
2014 04  05.53127  14 18 52.284  -11 21 12.17  23.6r 500836    568  C~1XRY      
2014 04  29.34030  14 17 04.183  -11 11 54.64  23.4r 500836    568  C~1XRY      
2014 04  29.34534  14 17 04.156  -11 11 54.53  23.5r 500836    568  C~1XRY      
2014 04  29.38070  14 17 03.985  -11 11 53.65  23.7r 500836    568  C~1XRY      
2014 04  29.38574  14 17 03.958  -11 11 53.57  23.5r 500836    568  C~1XRY      
2014 04  29.42105  14 17 03.800  -11 11 52.76  23.6r 500836    568  C~1XRY      
2014 04  29.42745  14 17 03.767  -11 11 52.60  23.5r 500836    568  C~1XRY      
2014 04  29.43257  14 17 03.741  -11 11 52.52  23.5r 500836    568  C~1XRY      
2014 05  22.45766  14 15 21.016  -11 03 34.35  23.5r 500836    568  C~1XRY      
2014 05  25.45015  14 15 08.861  -11 02 37.94  23.7r 500836    568  C~1XRY      
2016 03  13.37385  14 30 59.40   -12 27 30.5   22.9R 500836    G37  C~1pQU      
2016 03  13.45273  14 30 59.13   -12 27 29.6         500836    G37  C~1pQU      
2016 05  05.32208  14 27 21.036  -12 09 00.72  23.6r 500836    568  C~2KOG      
2016 05  05.39771  14 27 20.685  -12 08 59.11  23.4r 500836    568  C~2KOG      
2016 05  05.40175  14 27 20.657  -12 08 58.92  23.3r 500836    568  C~2KOG      
2017 03  31.47468  14 35 20.264  -12 50 42.11  23.8w 500836    568  C~2KOG      
2017 05  21.34842  14 31 32.837  -12 32 35.77  23.5r 500836    568  C~2KOG      
2017 05  24.27564  14 31 20.322  -12 31 40.15  23.4r 500836    568  C~2KOG      
2017 05  24.35116  14 31 19.994  -12 31 38.70  22.6r 500836    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    -0.18       0.00     0.78
  2   0.0001      0.00     0.02       0.00    -0.14
  3   0.0002      0.00    -0.09       0.00    -0.15
  4   0.0059      0.00    -0.17       0.00    -0.03
  5   0.0109      0.00    -0.06       0.00     0.05
  6   0.1013      0.00     0.09       0.00     0.01
  7   0.1041      0.00     0.14       0.00     0.04
  8   0.1913      0.00    -0.07       0.00    -0.14
  9   0.2488      0.00     0.36       0.00    -0.07
 10   0.2543      0.00    -0.04       0.00    -0.06
 11   0.8929      0.00     0.02       0.00     0.00
 12   0.8956      0.00     0.13       0.00    -0.04
 13   0.9037      0.00     0.05       0.00     0.00
 14   0.9993      0.00     0.09       0.00     0.07
 15   0.9994      0.00     0.13       0.00     0.05
 16   1.0023      0.00    -0.10       0.00     0.05
 17   1.0675      0.00     0.10       0.00    -0.01
 18   1.0675      0.00     0.06       0.00    -0.02
 19   1.0676      0.00     0.01       0.00     0.04
 20   1.0676      0.00    -0.04       0.00     0.00
 21   1.0677      0.00     0.10       0.00    -0.01
 22   1.0677      0.00     0.06       0.00     0.00
 23   1.0677      0.00     0.04       0.00    -0.04
 24   1.1308      0.00    -0.02       0.00     0.10
 25   1.1390      0.00     0.05       0.00     0.06
 26   2.9403      0.00     0.46       0.00     0.26
 27   2.9405      0.00    -0.11       0.00    -0.11
 28   3.0852      0.00     0.03       0.00    -0.16
 29   3.0854      0.00     0.12       0.00    -0.21
 30   3.0855      0.00    -0.01       0.00    -0.11
 31   3.9891      0.00     0.02       0.00    -0.06
 32   4.1284      0.00    -0.05       0.00     0.01
 33   4.1364      0.00     0.02       0.00     0.02
 34   4.1367      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.

500836    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        45.412    45.412    45.412
ecceobj         0.128     0.128     0.128
incobj          2.849     2.849     2.849
qmin           38.916    38.918    38.907
qmax           52.973    52.972    52.944
amean          45.754    45.753    45.754
amin           45.373    45.371    45.361
amax           46.178    46.178    46.175
emean           0.132     0.132     0.132
emin            0.118     0.118     0.118
emax            0.147     0.147     0.147
imean           1.220     1.220     1.220
imin            0.657     0.657     0.657
imax            1.782     1.783     1.783
excite_mean     0.134     0.134     0.134
fracstop        1.000     1.000     1.000
cjmean          3.101     3.101     3.101

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       198.9     198.9     198.9
kozaiamp        179.9     179.9     179.9