Orbit Fit and Astrometric record for 500835

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: 500835    
# Created Sat Dec 16 02:36:54 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   41 observations of   41
# Arc:   4.14y
# First observation: 2013/02/08
#  Last observation: 2017/03/31
# Chi-squared of fit:    25.62 DOF:   76 RMS:  0.14
# Min/Max residuals:    -0.36    0.87
# Exact a, adot, b, bdot, g, gdot:
  1.607310E-05  2.408087E-02 -7.955558E-07 -8.937441E-04  2.415114E-02  1.414708E-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
    1.827445 -147.360371    0.941323    0.009391   -0.292628  2456332.057178
# Heliocentric elements and errors
Epoch:              2456332.5000  =  2013/02/09
Mean Anomaly:           33.63188 +/-     0.000
Argument of Peri:      100.93129 +/-     0.000
Long of Asc Node:       72.35523 +/-     0.000
Inclination:             2.76348 +/-     0.000
Eccentricity:         0.06466227 +/-    0.0000
Semi-Major Axis:     44.01543888 +/-    0.0000
Time of Perihelion: 2446368.0217 +/-       0.0
Perihelion:          41.16930078 +/-    0.0000
Aphelion:            46.86157698 +/-    0.0000
Period (y)              292.0221 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -35.60218787 +/-    0.0000
Ecliptic Y          -21.68436647 +/-    0.0000
Ecliptic Z            1.32037549 +/-    0.0000
Ecliptic XDOT         0.00132846 +/-    0.0000
Ecliptic YDOT        -0.00238602 +/-    0.0000
Ecliptic ZDOT        -0.00009602 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.70694024 +/-    0.0000
Geocenter to KBO     41.40589838 +/-    0.0000
# Hcoef:  7.16

The following table shows the complete astrometric record for 500835. 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 (500835) followed by the observatory code and reference code for the source of the astrometry.

2013 02  08.55640  14 04 18.773  -10 40 16.86  23.2r 500835    568  C~1XRY      
2013 02  08.60359  14 04 18.747  -10 40 16.62  23.7r 500835    568  C~1XRY      
2013 04  04.41383  14 01 44.607  -10 25 06.63  23.1r 500835    568  C~1XRY      
2013 04  04.45396  14 01 44.421  -10 25 05.65  22.8r 500835    568  C~1XRY      
2013 04  04.49439  14 01 44.242  -10 25 04.68  23.0r 500835    568  C~1XRY      
2013 04  05.53143  14 01 39.690  -10 24 39.86  22.6r 500835    568  C~1XRY      
2013 04  05.53531  14 01 39.660  -10 24 39.53  23.0r 500835    568  C~1XRY      
2013 04  06.58684  14 01 35.025  -10 24 14.27  23.0r 500835    568  C~1XRY      
2013 04  08.38751  14 01 27.011  -10 23 30.14  23.4r 500835    568  C~1XRY      
2013 05  11.41804  13 58 56.196  -10 10 15.45  23.0r 500835    568  C~1XRY      
2013 05  12.41931  13 58 51.867  -10 09 53.37  23.3r 500835    568  C~1XRY      
2013 06  13.29820  13 56 58.758  -10 00 46.70  23.2r 500835    568  C~1XRY      
2013 07  04.27893  13 56 21.950  -09 58 28.63  23.1r 500835    568  C~1XRY      
2013 07  06.28622  13 56 20.339  -09 58 26.24  23.5r 500835    568  C~1XRY      
2014 02  25.51607  14 09 09.454  -11 08 41.03  23.2r 500835    568  C~1XRY      
2014 02  25.55969  14 09 09.365  -11 08 40.55  23.1r 500835    568  C~1XRY      
2014 02  25.60433  14 09 09.272  -11 08 39.97  23.1r 500835    568  C~1XRY      
2014 02  27.62682  14 09 04.982  -11 08 13.70  23.4r 500835    568  C~1XRY      
2014 03  28.41797  14 07 32.252  -10 59 26.23  23.3r 500835    568  C~1XRY      
2014 03  28.45726  14 07 32.089  -10 59 25.23        500835    568  C~1XRY      
2014 04  05.38215  14 06 58.641  -10 56 23.44  23.0r 500835    568  C~1XRY      
2014 04  29.33023  14 05 08.997  -10 46 45.90  23.2r 500835    568  C~1XRY      
2014 04  29.33527  14 05 08.972  -10 46 45.77  23.4r 500835    568  C~1XRY      
2014 04  29.37062  14 05 08.808  -10 46 44.95  23.1r 500835    568  C~1XRY      
2014 04  29.37566  14 05 08.779  -10 46 44.80  23.1r 500835    568  C~1XRY      
2014 04  29.41097  14 05 08.613  -10 46 44.00  23.0r 500835    568  C~1XRY      
2014 04  29.41601  14 05 08.589  -10 46 43.82  23.1r 500835    568  C~1XRY      
2014 05  22.40562  14 03 27.895  -10 38 16.83  23.0r 500835    568  C~1XRY      
2014 05  28.37773  14 03 04.889  -10 36 25.62  23.3r 500835    568  C~1XRY      
2015 04  19.41871  14 11 14.573  -11 22 10.49  22.9r 500835    568  C~2KOF      
2015 04  19.42375  14 11 14.517  -11 22 10.41  26.6u 500835    568  C~2KOF      
2015 04  19.48487  14 11 14.254  -11 22 08.91  23.0r 500835    568  C~2KOF      
2016 02  04.64352  14 19 58.408  -12 11 56.59  23.4w 500835    568  C~2KOF      
2016 02  11.62203  14 19 57.214  -12 11 36.32  23.6w 500835    568  C~2KOF      
2016 03  11.62923  14 19 05.282  -12 06 22.29        500835    568  C~2KOF      
2016 03  12.50183  14 19 02.676  -12 06 07.84        500835    568  C~2KOG      
2016 03  13.35759  14 19 00.05   -12 05 53.5   23.1R 500835    G37  C~1pQU      
2016 03  13.43911  14 18 59.80   -12 05 52.2         500835    G37  C~1pQU      
2017 03  28.58864  14 23 26.122  -12 31 25.23        500835    568  C~2KOG      
2017 03  29.52041  14 23 22.463  -12 31 06.12  23.2w 500835    568  C~2KOG      
2017 03  31.46997  14 23 14.662  -12 30 25.89  23.5w 500835    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     0.87
  2   0.0001      0.00     0.10       0.00     0.03
  3   0.1502      0.00     0.12       0.00    -0.04
  4   0.1503      0.00     0.01       0.00    -0.02
  5   0.1504      0.00     0.03       0.00    -0.02
  6   0.1533      0.00     0.11       0.00    -0.13
  7   0.1533      0.00    -0.08       0.00     0.10
  8   0.1561      0.00     0.21       0.00    -0.04
  9   0.1611      0.00     0.23       0.00     0.34
 10   0.2515      0.00    -0.03       0.00    -0.07
 11   0.2542      0.00     0.04       0.00    -0.04
 12   0.3415      0.00     0.00       0.00    -0.00
 13   0.3990      0.00    -0.02       0.00     0.02
 14   0.4045      0.00    -0.02       0.00     0.08
 15   1.0457      0.00    -0.07       0.00     0.03
 16   1.0459      0.00    -0.02       0.00    -0.04
 17   1.0460      0.00     0.00       0.00    -0.02
 18   1.0515      0.00     0.04       0.00    -0.07
 19   1.1304      0.00    -0.01       0.00    -0.21
 20   1.1305      0.00    -0.01       0.00    -0.08
 21   1.1522      0.00     0.09       0.00     0.09
 22   1.2177      0.00     0.09       0.00    -0.09
 23   1.2177      0.00     0.07       0.00    -0.08
 24   1.2178      0.00     0.11       0.00    -0.10
 25   1.2178      0.00     0.03       0.00    -0.07
 26   1.2179      0.00     0.04       0.00    -0.11
 27   1.2180      0.00     0.04       0.00    -0.05
 28   1.2809      0.00     0.22       0.00    -0.04
 29   1.2973      0.00     0.06       0.00    -0.16
 30   2.1899      0.00     0.13       0.00     0.03
 31   2.1899      0.00    -0.36       0.00    -0.01
 32   2.1901      0.00     0.03       0.00     0.02
 33   2.9872      0.00    -0.06       0.00    -0.03
 34   3.0063      0.00    -0.01       0.00    -0.09
 35   3.0858      0.00     0.17       0.00     0.13
 36   3.0881      0.00     0.17       0.00     0.12
 37   3.0905      0.00     0.03       0.00     0.08
 38   3.0907      0.00     0.15       0.00    -0.00
 39   4.1315      0.00    -0.06       0.00    -0.07
 40   4.1341      0.00     0.00       0.00     0.05
 41   4.1394      0.00     0.10       0.00    -0.04

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.

500835    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.842    43.842    43.842
ecceobj         0.060     0.060     0.060
incobj          2.764     2.764     2.764
qmin           40.426    40.427    40.427
qmax           48.097    48.091    48.093
amean          44.156    44.156    44.156
amin           43.810    43.809    43.803
amax           44.521    44.522    44.522
emean           0.065     0.065     0.065
emin            0.048     0.048     0.048
emax            0.080     0.081     0.081
imean           1.322     1.322     1.322
imin            0.527     0.527     0.527
imax            1.908     1.908     1.909
excite_mean     0.069     0.069     0.069
fracstop        1.000     1.000     1.000
cjmean          3.098     3.098     3.098

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       178.5     178.4     178.6
kozaiamp        179.9     179.9     180.0