Orbit Fit and Astrometric record for 500882

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: 500882    
# Created Fri Dec 15 02:36:51 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   35 observations of   35
# Arc:   3.82y
# First observation: 2013/04/10
#  Last observation: 2017/02/02
# Chi-squared of fit:    25.27 DOF:   64 RMS:  0.15
# Min/Max residuals:    -0.36    0.43
# Exact a, adot, b, bdot, g, gdot:
  1.820603E-05  3.070255E-02 -8.156861E-07 -4.808194E-04  2.673858E-02  2.513318E-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
    7.858541 -117.001308    0.673882    0.101694   -0.736669  2456393.102018
# Heliocentric elements and errors
Epoch:              2456392.5000  =  2013/04/10
Mean Anomaly:            9.06650 +/-     0.000
Argument of Peri:       78.64451 +/-     0.000
Long of Asc Node:      146.38629 +/-     0.000
Inclination:             7.74148 +/-     0.000
Eccentricity:         0.28506325 +/-    0.0000
Semi-Major Axis:     52.83568227 +/-    0.0000
Time of Perihelion: 2452859.6405 +/-       0.0
Perihelion:          37.77417099 +/-    0.0000
Aphelion:            67.89719355 +/-    0.0000
Period (y)              384.0601 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -17.75693850 +/-    0.0000
Ecliptic Y          -33.36396651 +/-    0.0000
Ecliptic Z            5.11351057 +/-    0.0000
Ecliptic XDOT         0.00267596 +/-    0.0000
Ecliptic YDOT        -0.00166009 +/-    0.0000
Ecliptic ZDOT        -0.00001344 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.13932037 +/-    0.0000
Geocenter to KBO     37.39911002 +/-    0.0000
# Hcoef:  8.41

The following table shows the complete astrometric record for 500882. 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 (500882) followed by the observatory code and reference code for the source of the astrometry.

2013 04  10.60124  16 10 01.479  -13 02 26.74  24.0r 500882    568  C~1XRd      
2013 04  19.47215  16 09 28.734  -12 59 45.52  24.0r 500882    568  C~1XRd      
2013 04  19.52501  16 09 28.531  -12 59 44.59  23.9r 500882    568  C~1XRd      
2013 05  08.45928  16 08 03.223  -12 54 06.89  24.0r 500882    568  C~1XRd      
2013 05  08.50332  16 08 03.005  -12 54 06.16  24.0r 500882    568  C~1XRd      
2013 05  08.54713  16 08 02.776  -12 54 05.39  23.7r 500882    568  C~1XRd      
2013 05  09.55421  16 07 57.809  -12 53 48.31  24.1r 500882    568  C~1XRd      
2013 05  10.55976  16 07 52.821  -12 53 31.30  23.7r 500882    568  C~1XRd      
2013 06  06.34333  16 05 36.085  -12 47 09.71  23.9r 500882    568  C~1XRd      
2013 06  06.42884  16 05 35.633  -12 47 08.78        500882    568  C~1XRd      
2013 07  02.38082  16 03 38.761  -12 44 05.63  24.5r 500882    568  C~1XRd      
2013 07  04.37206  16 03 31.337  -12 44 00.91  24.1r 500882    568  C~1XRd      
2013 08  02.31452  16 02 18.838  -12 45 37.65  24.1r 500882    568  C~1XRd      
2013 08  05.30445  16 02 15.700  -12 46 04.86  24.0r 500882    568  C~1XRd      
2014 03  06.62146  16 18 01.496  -13 32 03.79  24.4r 500882    568  C~1XRd      
2014 03  07.59609  16 18 01.630  -13 31 52.06  24.6r 500882    568  C~1XRd      
2014 05  01.41785  16 15 43.701  -13 17 15.45  24.3r 500882    568  C~1XRd      
2014 05  01.46926  16 15 43.444  -13 17 14.32  23.9r 500882    568  C~1XRd      
2014 05  01.52791  16 15 43.189  -13 17 13.20  24.2r 500882    568  C~1XRd      
2014 05  04.41561  16 15 29.822  -13 16 24.20        500882    568  C~1XRd      
2014 05  04.46606  16 15 29.565  -13 16 23.68  24.0r 500882    568  C~1XRd      
2014 05  04.51675  16 15 29.328  -13 16 22.84  24.3r 500882    568  C~1XRd      
2014 05  22.51414  16 13 59.711  -13 11 41.73  23.9r 500882    568  C~1XRd      
2014 05  25.46782  16 13 44.479  -13 11 00.49  24.2r 500882    568  C~1XRd      
2014 06  02.46901  16 13 03.190  -13 09 18.89  23.9r 500882    568  C~1XRd      
2014 06  21.44054  16 11 30.356  -13 06 25.06  24.2r 500882    568  C~1XRd      
2014 06  22.41323  16 11 25.945  -13 06 19.00  23.8r 500882    568  C~1XRd      
2014 07  18.36907  16 09 49.727  -13 05 35.95  24.1r 500882    568  C~2LSW      
2014 07  18.37716  16 09 49.697  -13 05 35.86  24.5r 500882    568  C~1XRd      
2015 03  22.57019  16 24 51.483  -13 48 14.25  24.2r 500882    568  C~1XRd      
2015 08  11.31349  16 16 08.063  -13 28 55.64  24.2r 500882    568  C~2LSW      
2016 05  29.37647  16 27 33.577  -13 50 15.23  24.3w 500882    568  C~2LSW      
2016 06  03.41661  16 27 07.479  -13 49 19.70  24.1w 500882    568  C~2LSW      
2017 01  31.66702  16 37 25.484  -14 31 39.02  24.1w 500882    568  C~2LSW      
2017 02  02.66017  16 37 33.773  -14 31 35.80  24.9w 500882    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     0.17       0.00     0.07
  2   0.0243      0.00    -0.04       0.00     0.01
  3   0.0244      0.00     0.16       0.00    -0.02
  4   0.0763      0.00     0.14       0.00    -0.09
  5   0.0764      0.00     0.18       0.00    -0.11
  6   0.0765      0.00     0.03       0.00    -0.09
  7   0.0793      0.00     0.01       0.00    -0.10
  8   0.0820      0.00     0.00       0.00    -0.03
  9   0.1554      0.00     0.13       0.00    -0.16
 10   0.1556      0.00    -0.10       0.00    -0.17
 11   0.2266      0.00    -0.23       0.00    -0.00
 12   0.2321      0.00     0.25       0.00     0.08
 13   0.3113      0.00     0.02       0.00    -0.14
 14   0.3195      0.00     0.08       0.00    -0.00
 15   0.9035      0.00    -0.01       0.00     0.02
 16   0.9062      0.00    -0.13       0.00     0.15
 17   1.0563      0.00     0.24       0.00    -0.08
 18   1.0564      0.00    -0.03       0.00     0.18
 19   1.0566      0.00     0.25       0.00     0.30
 20   1.0645      0.00     0.37       0.00     0.43
 21   1.0647      0.00     0.14       0.00     0.11
 22   1.0648      0.00     0.23       0.00     0.10
 23   1.1141      0.00    -0.36       0.00    -0.21
 24   1.1222      0.00    -0.08       0.00    -0.01
 25   1.1441      0.00     0.03       0.00    -0.04
 26   1.1960      0.00     0.10       0.00    -0.04
 27   1.1987      0.00     0.03       0.00    -0.00
 28   1.2697      0.00     0.12       0.00    -0.06
 29   1.2697      0.00     0.01       0.00     0.05
 30   1.9465      0.00    -0.07       0.00    -0.27
 31   2.3346      0.00    -0.10       0.00    -0.02
 32   3.1342      0.00     0.23       0.00    -0.20
 33   3.1480      0.00     0.03       0.00    -0.00
 34   3.8113      0.00    -0.28       0.00     0.08
 35   3.8167      0.00     0.11       0.00    -0.02

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.

500882    quality flag:3

Type:        7:3EEEE   7:3EEEE   7:3EEEE

axisobj        52.605    52.605    52.605
ecceobj         0.282     0.282     0.282
incobj          7.744     7.744     7.744
qmin           37.270    37.237    37.269
qmax           69.812    69.780    69.726
amean          52.969    52.969    52.969
amin           52.259    52.261    52.269
amax           53.801    53.781    53.774
emean           0.285     0.285     0.284
emin            0.272     0.272     0.272
emax            0.298     0.298     0.297
imean           6.719     6.719     6.722
imin            6.430     6.429     6.410
imax            7.032     7.090     7.042
excite_mean     0.308     0.308     0.308
fracstop        1.000     1.000     1.000
cjmean          3.094     3.094     3.094

libcent 0       185.1     183.2     182.1
libamp  0       151.9     157.0     155.1
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       185.6     189.5     191.7
kozaiamp        179.9     180.0     180.0