Orbit Fit and Astrometric record for 500833

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: 500833    
# Created Sat Dec 16 02:36:54 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   36 observations of   36
# Arc:   4.29y
# First observation: 2013/02/08
#  Last observation: 2017/05/24
# Chi-squared of fit:    36.36 DOF:   66 RMS:  0.18
# Min/Max residuals:    -0.34    1.01
# Exact a, adot, b, bdot, g, gdot:
  1.746133E-05  3.129614E-02  2.462871E-06  3.766564E-03  2.847454E-02  1.629854E-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
    0.931765 -146.420591    0.946017    0.004563   -0.277197  2456332.053298
# Heliocentric elements and errors
Epoch:              2456332.5000  =  2013/02/09
Mean Anomaly:           13.46421 +/-     0.000
Argument of Peri:      351.06904 +/-     0.000
Long of Asc Node:      204.44387 +/-     0.000
Inclination:             6.95255 +/-     0.000
Eccentricity:         0.10271640 +/-    0.0000
Semi-Major Axis:     39.30687883 +/-    0.0000
Time of Perihelion: 2452965.9910 +/-       0.0
Perihelion:          35.26941774 +/-    0.0000
Aphelion:            43.34433991 +/-    0.0000
Period (y)              246.4399 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -30.00736861 +/-    0.0000
Ecliptic Y          -18.78472801 +/-    0.0000
Ecliptic Z            0.57117362 +/-    0.0000
Ecliptic XDOT         0.00153249 +/-    0.0000
Ecliptic YDOT        -0.00258944 +/-    0.0000
Ecliptic ZDOT         0.00036479 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.40668382 +/-    0.0000
Geocenter to KBO     35.11907731 +/-    0.0000
# Hcoef:  8.39

The following table shows the complete astrometric record for 500833. 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 (500833) followed by the observatory code and reference code for the source of the astrometry.

2013 02  08.55252  14 06 40.543  -11 49 58.54  23.0r 500833    568  C~1XRW      
2013 02  08.59963  14 06 40.492  -11 49 58.11  24.4r 500833    568  C~1XRW      
2013 04  04.40980  14 03 49.521  -11 31 35.18  24.1r 500833    568  C~1XRW      
2013 04  04.44973  14 03 49.314  -11 31 33.82  24.1r 500833    568  C~1XRW      
2013 04  04.49037  14 03 49.102  -11 31 32.80  23.9r 500833    568  C~1XRW      
2013 04  05.51533  14 03 43.960  -11 31 02.31  23.8r 500833    568  C~1XRW      
2013 04  05.51921  14 03 43.931  -11 31 02.26  23.7r 500833    568  C~1XRW      
2013 04  05.52309  14 03 43.907  -11 31 02.33  23.0r 500833    568  C~1XRW      
2013 04  05.52700  14 03 43.898  -11 31 01.91  22.9r 500833    568  C~1XRW      
2013 04  06.58284  14 03 38.555  -11 30 30.18  23.8r 500833    568  C~1XRW      
2013 04  08.38349  14 03 29.355  -11 29 36.03  23.7r 500833    568  C~1XRW      
2013 05  11.41411  14 00 35.833  -11 12 50.31  23.8r 500833    568  C~1XRW      
2013 05  12.41537  14 00 30.839  -11 12 21.58  23.8r 500833    568  C~1XRW      
2013 06  13.25353  13 58 21.380  -11 00 01.93  22.4r 500833    568  C~1XRW      
2013 06  13.29418  13 58 21.246  -11 00 00.77  23.8r 500833    568  C~1XRW      
2013 07  04.27505  13 57 40.459  -10 56 05.63  24.4r 500833    568  C~1XRX      
2013 07  06.28229  13 57 38.827  -10 55 55.68        500833    568  C~1XRX      
2014 02  24.55846  14 13 32.927  -12 11 03.81  23.6r 500833    568  C~1XRX      
2014 02  25.52781  14 13 30.921  -12 10 49.46  24.2r 500833    568  C~1XRX      
2014 02  27.63879  14 13 26.189  -12 10 16.27  23.9r 500833    568  C~1XRX      
2014 04  04.44681  14 11 09.885  -11 56 17.90  23.7r 500833    568  C~1XRX      
2014 04  05.57455  14 11 04.284  -11 55 45.23  24.2r 500833    568  C~1XRX      
2014 05  22.40174  14 07 02.552  -11 32 55.79  23.6r 500833    568  C~1XRX      
2014 05  28.37385  14 06 35.930  -11 30 28.35  23.7r 500833    568  C~1XRX      
2014 06  26.30540  14 05 03.752  -11 22 01.38  23.8r 500833    568  C~1XRX      
2014 07  18.31734  14 04 45.612  -11 20 22.37  24.1r 500833    568  C~1XRX      
2016 03  13.36926  14 27 19.72   -12 52 03.2   23.9R 500833    G37  C~1pQU      
2016 03  13.44810  14 27 19.44   -12 52 01.5         500833    G37  C~1pQU      
2016 05  07.36834  14 22 55.787  -12 27 19.71  23.8r 500833    568  C~2KOF      
2016 05  07.43430  14 22 55.422  -12 27 17.93  23.9r 500833    568  C~2KOF      
2016 05  29.34785  14 21 07.052  -12 17 47.68  24.0w 500833    568  C~2KOF      
2017 02  23.64413  14 35 20.047  -13 18 54.08        500833    568  C~2KOF      
2017 03  30.53104  14 33 33.441  -13 07 40.47        500833    568  C~2KOF      
2017 03  31.47468  14 33 29.222  -13 07 16.39  23.7w 500833    568  C~2KOF      
2017 05  21.34842  14 29 06.446  -12 43 57.09  23.7r 500833    568  C~2KOF      
2017 05  24.27564  14 28 52.094  -12 42 44.33  23.7r 500833    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    -0.21       0.00     1.01
  2   0.0001      0.00    -0.34       0.00     0.04
  3   0.1502      0.00     0.14       0.00    -0.11
  4   0.1503      0.00     0.09       0.00     0.07
  5   0.1504      0.00     0.02       0.00    -0.11
  6   0.1532      0.00     0.20       0.00    -0.08
  7   0.1532      0.00     0.06       0.00    -0.15
  8   0.1532      0.00     0.00       0.00    -0.33
  9   0.1532      0.00     0.17       0.00    -0.03
 10   0.1561      0.00     0.30       0.00     0.12
 11   0.1611      0.00     0.05       0.00     0.05
 12   0.2515      0.00    -0.03       0.00    -0.02
 13   0.2542      0.00    -0.07       0.00     0.08
 14   0.3414      0.00     0.17       0.00    -0.28
 15   0.3415      0.00     0.00       0.00     0.20
 16   0.3990      0.00    -0.02       0.00     0.05
 17   0.4045      0.00     0.13       0.00     0.10
 18   1.0431      0.00    -0.02       0.00     0.04
 19   1.0458      0.00     0.09       0.00    -0.06
 20   1.0516      0.00     0.05       0.00     0.02
 21   1.1496      0.00     0.06       0.00    -0.16
 22   1.1527      0.00     0.12       0.00    -0.11
 23   1.2809      0.00     0.13       0.00    -0.02
 24   1.2973      0.00    -0.06       0.00    -0.09
 25   1.3765      0.00    -0.04       0.00     0.06
 26   1.4367      0.00    -0.09       0.00     0.18
 27   3.0905      0.00     0.17       0.00     0.26
 28   3.0907      0.00     0.00       0.00     0.32
 29   3.2411      0.00     0.09       0.00     0.02
 30   3.2413      0.00    -0.03       0.00    -0.06
 31   3.3013      0.00     0.22       0.00    -0.00
 32   4.0413      0.00     0.09       0.00     0.07
 33   4.1368      0.00     0.03       0.00    -0.23
 34   4.1394      0.00    -0.02       0.00    -0.15
 35   4.2787      0.00    -0.01       0.00    -0.09
 36   4.2867      0.00    -0.02       0.00    -0.16

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.

500833    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.164    39.164    39.164
ecceobj         0.099     0.099     0.099
incobj          6.964     6.964     6.964
qmin           34.306    34.306    34.306
qmax           44.958    44.958    44.958
amean          39.459    39.459    39.459
amin           39.081    39.081    39.080
amax           39.876    39.876    39.876
emean           0.108     0.108     0.108
emin            0.088     0.088     0.088
emax            0.128     0.128     0.128
imean           7.991     7.991     7.991
imin            7.249     7.249     7.249
imax            8.754     8.754     8.754
excite_mean     0.176     0.176     0.176
fracstop        1.000     1.000     1.000
cjmean          3.016     3.016     3.016

libcent 0       180.8     180.8     180.8
libamp  0        69.1      69.1      69.1
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       182.1     182.1     182.0
kozaiamp        180.0     180.0     180.0