Orbit Fit and Astrometric record for 500886

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: 500886    
# Created Mon Dec 18 02:36:53 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   39 observations of   39
# Arc:   4.06y
# First observation: 2013/04/09
#  Last observation: 2017/05/02
# Chi-squared of fit:    16.93 DOF:   72 RMS:  0.12
# Min/Max residuals:    -0.20    0.53
# Exact a, adot, b, bdot, g, gdot:
  1.453599E-05  2.294339E-02 -4.776985E-06 -7.461652E-03  2.477258E-02  3.348671E-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
    8.404723 -123.174071    0.604536    0.117045   -0.792038  2456392.036308
# Heliocentric elements and errors
Epoch:              2456392.5000  =  2013/04/10
Mean Anomaly:          172.10148 +/-     0.000
Argument of Peri:      342.47925 +/-     0.000
Long of Asc Node:       79.86617 +/-     0.000
Inclination:            19.67826 +/-     0.000
Eccentricity:         0.01472036 +/-    0.0000
Semi-Major Axis:     40.56970113 +/-    0.0000
Time of Perihelion: 2411271.0290 +/-       0.0
Perihelion:          39.97250068 +/-    0.0000
Aphelion:            41.16690158 +/-    0.0000
Period (y)              258.4110 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -22.79404179 +/-    0.0000
Ecliptic Y          -33.76212355 +/-    0.0000
Ecliptic Z            5.90010065 +/-    0.0000
Ecliptic XDOT         0.00203011 +/-    0.0000
Ecliptic YDOT        -0.00151867 +/-    0.0000
Ecliptic ZDOT        -0.00081025 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.16139471 +/-    0.0000
Geocenter to KBO     40.36722486 +/-    0.0000
# Hcoef:  7.46

The following table shows the complete astrometric record for 500886. 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 (500886) followed by the observatory code and reference code for the source of the astrometry.

2013 04  09.53553  15 46 00.077  -11 15 36.77  23.5r 500886    568  C~1XRg      
2013 04  10.50462  15 45 56.496  -11 15 21.25  23.5r 500886    568  C~1XRg      
2013 04  10.54490  15 45 56.339  -11 15 20.47  23.3r 500886    568  C~1XRg      
2013 04  19.55776  15 45 20.334  -11 12 54.93  23.2r 500886    568  C~1XRg      
2013 05  04.43329  15 44 12.678  -11 09 01.75  23.4r 500886    568  C~1XRg      
2013 05  04.43834  15 44 12.651  -11 09 01.50  23.3r 500886    568  C~1XRg      
2013 05  04.44379  15 44 12.618  -11 09 01.27  23.1r 500886    568  C~1XRg      
2013 05  07.43599  15 43 58.134  -11 08 17.33  23.8r 500886    568  C~1XRg      
2013 05  07.48020  15 43 57.917  -11 08 16.71  23.5r 500886    568  C~1XRg      
2013 05  07.52039  15 43 57.719  -11 08 16.15  23.0r 500886    568  C~1XRg      
2013 05  09.48057  15 43 48.127  -11 07 47.88  23.4r 500886    568  C~1XRg      
2013 05  10.48774  15 43 43.176  -11 07 33.75  23.2r 500886    568  C~1XRg      
2014 02  24.64166  15 52 08.973  -12 06 45.48        500886    568  C~1XRg      
2014 02  28.61823  15 52 09.378  -12 06 15.58        500886    568  C~1XRg      
2014 03  06.54583  15 52 07.054  -12 05 22.70  23.5r 500886    568  C~1XRg      
2014 04  04.53015  15 51 08.606  -11 59 15.71  23.6r 500886    568  C~1XRg      
2014 04  04.54871  15 51 08.538  -11 59 15.67  23.7r 500886    568  C~1XRg      
2014 04  30.40127  15 49 24.501  -11 52 43.24  23.2r 500886    568  C~1XRg      
2014 04  30.45279  15 49 24.254  -11 52 42.52  23.5r 500886    568  C~1XRg      
2014 04  30.50453  15 49 24.009  -11 52 41.82  23.5r 500886    568  C~1XRg      
2014 05  05.45427  15 49 00.558  -11 51 29.51  23.5r 500886    568  C~1XRg      
2014 05  06.39610  15 48 56.020  -11 51 16.17  23.4r 500886    568  C~1XRg      
2014 05  06.46297  15 48 55.692  -11 51 15.23  23.3r 500886    568  C~1XRg      
2014 05  06.53903  15 48 55.319  -11 51 14.18  23.6r 500886    568  C~1XRg      
2014 05  22.48181  15 47 36.339  -11 47 47.79  23.5r 500886    568  C~1XRg      
2014 05  24.46324  15 47 26.448  -11 47 25.42  23.3r 500886    568  C~1XRg      
2016 04  03.57091  16 00 55.942  -13 22 54.02  23.7w 500886    568  C~2LSW      
2016 04  08.62047  16 00 39.639  -13 21 48.26  23.7w 500886    568  C~2LSW      
2016 04  09.56441  16 00 36.393  -13 21 35.74  23.7w 500886    568  C~2LSW      
2016 04  29.51761  15 59 14.995  -13 17 04.89  23.8w 500886    568  C~2LSW      
2016 05  04.49023  15 58 51.750  -13 15 58.60  23.8w 500886    568  C~2LSW      
2016 05  06.46079  15 58 42.301  -13 15 32.77  23.2r 500886    568  C~2LSW      
2016 05  06.52677  15 58 41.978  -13 15 31.90  23.4r 500886    568  C~2LSW      
2016 05  30.43368  15 56 42.847  -13 11 01.65  23.8w 500886    568  C~2LSW      
2017 01  31.65347  16 05 54.459  -14 09 38.94  23.8w 500886    568  C~2LSW      
2017 02  03.64979  16 06 03.035  -14 09 47.56        500886    568  C~2LSW      
2017 03  30.59606  16 06 03.553  -14 04 55.66  23.7w 500886    568  C~2LSW      
2017 05  02.35502  16 04 00.45   -13 58 08.0   23.4R 500886    G37  C~2Fa2      
2017 05  02.42034  16 04 00.16   -13 58 07.3         500886    G37  C~2Fa2      

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    -0.20       0.00     0.53
  2   0.0027      0.00     0.03       0.00    -0.08
  3   0.0028      0.00    -0.02       0.00     0.05
  4   0.0274      0.00     0.02       0.00    -0.09
  5   0.0682      0.00     0.23       0.00    -0.04
  6   0.0682      0.00     0.19       0.00     0.13
  7   0.0682      0.00     0.10       0.00     0.28
  8   0.0764      0.00     0.01       0.00     0.02
  9   0.0765      0.00     0.05       0.00    -0.00
 10   0.0766      0.00     0.07       0.00    -0.03
 11   0.0820      0.00    -0.00       0.00     0.02
 12   0.0847      0.00     0.04       0.00    -0.12
 13   0.8791      0.00     0.01       0.00     0.17
 14   0.8900      0.00    -0.05       0.00     0.10
 15   0.9063      0.00     0.03       0.00     0.03
 16   0.9856      0.00    -0.02       0.00     0.13
 17   0.9857      0.00    -0.12       0.00    -0.11
 18   1.0564      0.00     0.17       0.00    -0.01
 19   1.0566      0.00     0.13       0.00    -0.05
 20   1.0567      0.00     0.14       0.00    -0.11
 21   1.0703      0.00     0.12       0.00     0.01
 22   1.0729      0.00     0.09       0.00    -0.09
 23   1.0730      0.00     0.10       0.00    -0.09
 24   1.0732      0.00     0.12       0.00    -0.12
 25   1.1169      0.00    -0.09       0.00    -0.16
 26   1.1223      0.00    -0.01       0.00    -0.08
 27   2.9844      0.00     0.06       0.00    -0.08
 28   2.9982      0.00    -0.01       0.00    -0.04
 29   3.0008      0.00     0.03       0.00    -0.04
 30   3.0554      0.00     0.11       0.00    -0.15
 31   3.0690      0.00     0.08       0.00    -0.08
 32   3.0744      0.00    -0.07       0.00     0.01
 33   3.0746      0.00    -0.06       0.00     0.02
 34   3.1400      0.00     0.01       0.00    -0.12
 35   3.8141      0.00     0.18       0.00    -0.01
 36   3.8224      0.00    -0.02       0.00     0.08
 37   3.9728      0.00     0.04       0.00    -0.05
 38   4.0625      0.00    -0.12       0.00     0.24
 39   4.0627      0.00     0.16       0.00     0.11

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.

500886    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        40.447    40.447    40.447
ecceobj         0.017     0.017     0.017
incobj         19.675    19.675    19.675
qmin           39.447    39.447    39.447
qmax           42.116    42.116    42.116
amean          40.726    40.726    40.726
amin           40.418    40.418    40.418
amax           41.025    41.026    41.024
emean           0.015     0.015     0.015
emin            0.004     0.004     0.004
emax            0.027     0.027     0.027
imean          17.865    17.865    17.865
imin           17.163    17.163    17.163
imax           18.552    18.551    18.552
excite_mean     0.307     0.307     0.307
fracstop        1.000     1.000     1.000
cjmean          2.953     2.953     2.953

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       174.5     174.6     174.5
kozaiamp        180.0     180.0     180.0