Orbit Fit and Astrometric record for 500888

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: 500888    
# Created Sat Dec 16 02:36:55 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   35 observations of   35
# Arc:   3.15y
# First observation: 2013/04/09
#  Last observation: 2016/06/03
# Chi-squared of fit:    16.14 DOF:   64 RMS:  0.12
# Min/Max residuals:    -0.21    0.56
# Exact a, adot, b, bdot, g, gdot:
  1.563707E-05  2.507260E-02  1.661397E-06  3.870931E-03  2.535042E-02  1.883812E-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
    8.929842 -122.920689    0.608071    0.123882   -0.788283  2456392.036308
# Heliocentric elements and errors
Epoch:              2456392.5000  =  2013/04/10
Mean Anomaly:           65.95168 +/-     0.000
Argument of Peri:      331.92487 +/-     0.000
Long of Asc Node:      192.10242 +/-     0.000
Inclination:            12.47561 +/-     0.000
Eccentricity:         0.06403891 +/-    0.0000
Semi-Major Axis:     41.16590008 +/-    0.0000
Time of Perihelion: 2438718.7696 +/-       0.0
Perihelion:          38.52968087 +/-    0.0000
Aphelion:            43.80211929 +/-    0.0000
Period (y)              264.1281 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -22.12165283 +/-    0.0000
Ecliptic Y          -33.04859123 +/-    0.0000
Ecliptic Z            6.12326988 +/-    0.0000
Ecliptic XDOT         0.00219277 +/-    0.0000
Ecliptic YDOT        -0.00158554 +/-    0.0000
Ecliptic ZDOT         0.00044472 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.23764825 +/-    0.0000
Geocenter to KBO     39.44705341 +/-    0.0000
# Hcoef:  8.08

The following table shows the complete astrometric record for 500888. 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 (500888) followed by the observatory code and reference code for the source of the astrometry.

2013 04  09.53553  15 47 28.189  -10 48 12.38  24.0r 500888    568  C~1XRg      
2013 04  10.50462  15 47 24.701  -10 47 50.30  24.0r 500888    568  C~1XRg      
2013 04  10.54490  15 47 24.548  -10 47 49.36  23.9r 500888    568  C~1XRg      
2013 04  19.55776  15 46 49.353  -10 44 21.99  24.1r 500888    568  C~1XRg      
2013 05  07.43599  15 45 28.411  -10 37 44.80  24.2r 500888    568  C~1XRg      
2013 05  07.48020  15 45 28.188  -10 37 43.83  23.8r 500888    568  C~1XRg      
2013 05  07.52039  15 45 27.991  -10 37 43.01  24.0r 500888    568  C~1XRg      
2013 05  09.48057  15 45 18.520  -10 37 01.90  24.0r 500888    568  C~1XRg      
2013 05  10.48774  15 45 13.623  -10 36 41.12  23.8r 500888    568  C~1XRg      
2013 06  01.40276  15 43 26.362  -10 30 04.52  24.3r 500888    568  C~1XRg      
2013 06  01.40895  15 43 26.342  -10 30 04.81  24.1r 500888    568  C~1XRg      
2013 06  02.40261  15 43 21.596  -10 29 50.02  23.7r 500888    568  C~1XRg      
2013 06  06.37184  15 43 02.919  -10 28 53.87  23.9r 500888    568  C~1XRg      
2013 07  02.32424  15 41 17.569  -10 25 04.78  24.0r 500888    568  C~1XRg      
2013 07  03.36215  15 41 14.161  -10 25 00.97  24.1r 500888    568  C~1XRg      
2014 03  06.53071  15 54 32.292  -11 05 45.17  23.8r 500888    568  C~1XRg      
2014 04  04.52001  15 53 38.734  -10 55 56.23  23.8r 500888    568  C~1XRg      
2014 04  30.40515  15 51 57.490  -10 46 16.11  23.9r 500888    568  C~1XRg      
2014 04  30.45667  15 51 57.257  -10 46 15.10  23.9r 500888    568  C~1XRg      
2014 04  30.50841  15 51 57.026  -10 46 14.07  24.1r 500888    568  C~1XRg      
2014 05  05.45039  15 51 34.035  -10 44 28.16  23.8r 500888    568  C~1XRg      
2014 05  06.39222  15 51 29.571  -10 44 08.42  23.9r 500888    568  C~1XRg      
2014 05  06.45909  15 51 29.253  -10 44 07.09  23.8r 500888    568  C~1XRg      
2014 05  06.51006  15 51 28.998  -10 44 06.00  23.9r 500888    568  C~1XRg      
2014 05  06.53514  15 51 28.880  -10 44 05.50  24.1r 500888    568  C~1XRg      
2014 05  22.49847  15 50 10.944  -10 38 56.07  24.0r 500888    568  C~1XRg      
2014 05  22.50235  15 50 10.926  -10 38 55.93  24.0r 500888    568  C~1XRg      
2014 05  24.47488  15 50 01.200  -10 38 21.63  24.0r 500888    568  C~1XRg      
2014 06  02.45717  15 49 17.381  -10 35 59.12  24.0r 500888    568  C~1XRg      
2014 07  01.36375  15 47 14.436  -10 31 22.59  23.8r 500888    568  C~1XRg      
2014 07  18.33716  15 46 25.545  -10 31 08.86  24.1r 500888    568  C~1XRg      
2015 03  22.60347  16 00 02.976  -11 05 55.34  24.0r 500888    568  C~1XRg      
2015 08  11.30815  15 51 45.473  -10 39 47.94  24.1r 500888    568  C~2LSW      
2016 05  29.38457  16 01 23.421  -10 47 49.12  24.1w 500888    568  C~2LSW      
2016 06  03.42470  16 00 58.816  -10 46 37.36  24.2w 500888    568  C~2LSW      

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     0.56
  2   0.0027      0.00     0.00       0.00    -0.05
  3   0.0028      0.00    -0.05       0.00    -0.04
  4   0.0274      0.00     0.01       0.00    -0.09
  5   0.0764      0.00     0.08       0.00    -0.08
  6   0.0765      0.00    -0.01       0.00    -0.04
  7   0.0766      0.00    -0.01       0.00    -0.07
  8   0.0820      0.00     0.02       0.00    -0.02
  9   0.0847      0.00     0.02       0.00    -0.07
 10   0.1447      0.00     0.09       0.00     0.42
 11   0.1448      0.00     0.25       0.00     0.04
 12   0.1475      0.00     0.15       0.00    -0.04
 13   0.1583      0.00     0.08       0.00    -0.14
 14   0.2294      0.00     0.03       0.00    -0.16
 15   0.2322      0.00     0.00       0.00    -0.12
 16   0.9062      0.00    -0.08       0.00    -0.03
 17   0.9856      0.00     0.14       0.00    -0.12
 18   1.0565      0.00    -0.00       0.00     0.12
 19   1.0566      0.00     0.10       0.00     0.02
 20   1.0567      0.00     0.25       0.00    -0.07
 21   1.0703      0.00     0.14       0.00     0.08
 22   1.0728      0.00     0.06       0.00     0.05
 23   1.0730      0.00     0.14       0.00    -0.02
 24   1.0732      0.00     0.02       0.00     0.00
 25   1.0732      0.00     0.07       0.00    -0.02
 26   1.1169      0.00     0.05       0.00    -0.07
 27   1.1170      0.00     0.07       0.00     0.00
 28   1.1224      0.00     0.14       0.00     0.03
 29   1.1469      0.00     0.03       0.00     0.02
 30   1.2261      0.00    -0.00       0.00    -0.10
 31   1.2726      0.00    -0.01       0.00     0.01
 32   1.9495      0.00    -0.05       0.00    -0.04
 33   2.3375      0.00    -0.10       0.00     0.03
 34   3.1372      0.00     0.15       0.00    -0.13
 35   3.1510      0.00    -0.02       0.00     0.08

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.

500888    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        41.036    41.036    41.036
ecceobj         0.060     0.060     0.060
incobj         12.503    12.503    12.503
qmin           37.856    37.836    37.896
qmax           45.013    44.952    45.043
amean          41.337    41.337    41.337
amin           41.022    41.022    41.017
amax           41.671    41.666    41.673
emean           0.063     0.063     0.063
emin            0.047     0.047     0.047
emax            0.081     0.080     0.081
imean          13.382    13.382    13.382
imin           12.345    12.342    12.341
imax           14.306    14.304    14.301
excite_mean     0.240     0.240     0.240
fracstop        1.000     1.000     1.000
cjmean          3.003     3.003     3.003

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       175.0     175.0     175.2
kozaiamp        180.0     180.0     179.9