Orbit Fit and Astrometric record for 500879

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: 500879    
# Created Fri Dec 15 02:36:51 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   36 observations of   36
# Arc:   3.82y
# First observation: 2013/04/09
#  Last observation: 2017/02/03
# Chi-squared of fit:     4.61 DOF:   66 RMS:  0.06
# Min/Max residuals:    -0.09    0.19
# Exact a, adot, b, bdot, g, gdot:
  1.346163E-05  1.714165E-02 -2.796642E-06 -3.716370E-03  2.001703E-02  7.008173E-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
    6.733830 -121.681970    0.625127    0.092027   -0.779254  2456392.040188
# Heliocentric elements and errors
Epoch:              2456392.5000  =  2013/04/10
Mean Anomaly:           47.99765 +/-     0.000
Argument of Peri:       59.69759 +/-     0.000
Long of Asc Node:       85.94370 +/-     0.000
Inclination:            13.75938 +/-     0.000
Eccentricity:         0.38502650 +/-    0.0000
Semi-Major Axis:     59.06326881 +/-    0.0000
Time of Perihelion: 2434287.4179 +/-       0.0
Perihelion:          36.32234511 +/-    0.0000
Aphelion:            81.80419252 +/-    0.0000
Period (y)              453.9253 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -26.99969944 +/-    0.0000
Ecliptic Y          -42.55659951 +/-    0.0000
Ecliptic Z            5.85776587 +/-    0.0000
Ecliptic XDOT         0.00145761 +/-    0.0000
Ecliptic YDOT        -0.00209182 +/-    0.0000
Ecliptic ZDOT        -0.00039227 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   50.73789601 +/-    0.0000
Geocenter to KBO     49.95721482 +/-    0.0000
# Hcoef:  5.84

The following table shows the complete astrometric record for 500879. 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 (500879) followed by the observatory code and reference code for the source of the astrometry.

2013 04  09.53941  15 50 24.999  -13 12 49.09  22.6r 500879    568  C~1XRc      
2013 04  10.50850  15 50 22.104  -13 12 36.67  22.7r 500879    568  C~1XRc      
2013 04  10.54891  15 50 21.975  -13 12 36.15  22.8r 500879    568  C~1XRc      
2013 04  19.56175  15 49 52.813  -13 10 38.85  22.7r 500879    568  C~1XRc      
2013 05  07.43997  15 48 45.914  -13 06 47.14  22.7r 500879    568  C~1XRc      
2013 05  07.48420  15 48 45.737  -13 06 46.61  22.7r 500879    568  C~1XRc      
2013 05  07.52439  15 48 45.574  -13 06 46.08  22.7r 500879    568  C~1XRc      
2013 05  09.48456  15 48 37.745  -13 06 21.81        500879    568  C~1XRc      
2013 06  04.37273  15 46 53.073  -13 01 46.16  22.7r 500879    568  C~1XRc      
2013 07  02.32839  15 45 16.282  -12 59 19.65  22.8r 500879    568  C~1XRc      
2013 07  03.36611  15 45 13.353  -12 59 18.02  22.7r 500879    568  C~1XRc      
2014 03  06.58112  15 55 09.907  -13 43 28.56  22.8r 500879    568  C~1XRc      
2014 04  05.59546  15 54 20.288  -13 38 29.51  23.0r 500879    568  C~1XRc      
2014 04  05.60128  15 54 20.267  -13 38 29.56  23.0r 500879    568  C~1XRc      
2014 04  05.60639  15 54 20.242  -13 38 29.62  22.8r 500879    568  C~1XRc      
2014 04  30.42867  15 52 58.848  -13 33 20.21  22.7r 500879    568  C~1XRc      
2014 04  30.47995  15 52 58.650  -13 33 19.52  22.9r 500879    568  C~1XRc      
2014 04  30.53172  15 52 58.446  -13 33 18.93  22.6r 500879    568  C~1XRc      
2014 05  05.49140  15 52 39.403  -13 32 17.45  22.9r 500879    568  C~1XRc      
2014 05  06.42350  15 52 35.762  -13 32 06.00  22.7r 500879    568  C~1XRc      
2014 05  06.43939  15 52 35.699  -13 32 05.80  22.9r 500879    568  C~1XRc      
2014 05  06.49023  15 52 35.501  -13 32 05.20  22.6r 500879    568  C~1XRc      
2014 05  06.56630  15 52 35.192  -13 32 04.30        500879    568  C~1XRc      
2014 05  22.54556  15 51 30.845  -13 29 01.15  22.8r 500879    568  C~1XRc      
2014 05  25.50454  15 51 18.814  -13 28 30.45  22.7r 500879    568  C~2LSW      
2014 07  01.37930  15 49 04.311  -13 24 31.36  22.8r 500879    568  C~1XRc      
2014 07  18.34894  15 48 22.415  -13 24 33.43  23.0r 500879    568  C~1XRc      
2014 07  26.28482  15 48 09.096  -13 25 01.87  22.8r 500879    568  C~1XRc      
2015 03  22.60757  15 58 32.265  -14 05 16.46  22.7r 500879    568  C~1XRc      
2015 04  21.53176  15 57 14.189  -13 59 40.04  22.7r 500879    568  C~1XRc      
2015 04  21.58936  15 57 13.992  -13 59 39.25  22.8r 500879    568  C~1XRc      
2015 08  11.32974  15 51 36.457  -13 51 14.35  22.8r 500879    568  C~2LSW      
2016 05  29.38862  15 58 25.822  -14 16 33.21  23.0w 500879    568  C~2LSW      
2016 05  30.42964  15 58 21.644  -14 16 23.88  22.8w 500879    568  C~2LSW      
2017 01  31.65347  16 05 28.125  -14 55 04.14  23.0w 500879    568  C~2LSW      
2017 02  03.64979  16 05 34.791  -14 55 09.10        500879    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     0.09       0.00    -0.06
  2   0.0027      0.00     0.02       0.00    -0.03
  3   0.0028      0.00    -0.05       0.00    -0.03
  4   0.0274      0.00     0.05       0.00    -0.09
  5   0.0764      0.00     0.00       0.00     0.03
  6   0.0765      0.00     0.03       0.00     0.01
  7   0.0766      0.00     0.03       0.00     0.03
  8   0.0820      0.00     0.01       0.00    -0.04
  9   0.1529      0.00     0.15       0.00     0.02
 10   0.2294      0.00     0.02       0.00     0.01
 11   0.2322      0.00     0.05       0.00     0.06
 12   0.9063      0.00     0.01       0.00    -0.04
 13   0.9885      0.00     0.15       0.00     0.19
 14   0.9885      0.00     0.08       0.00     0.07
 15   0.9885      0.00    -0.09       0.00    -0.05
 16   1.0565      0.00     0.10       0.00    -0.03
 17   1.0566      0.00     0.08       0.00     0.02
 18   1.0568      0.00     0.01       0.00    -0.04
 19   1.0704      0.00     0.11       0.00    -0.06
 20   1.0729      0.00     0.11       0.00    -0.02
 21   1.0730      0.00     0.11       0.00    -0.01
 22   1.0731      0.00     0.19       0.00    -0.03
 23   1.0733      0.00     0.10       0.00    -0.07
 24   1.1171      0.00    -0.01       0.00    -0.08
 25   1.1252      0.00     0.07       0.00     0.07
 26   1.2261      0.00     0.05       0.00     0.00
 27   1.2726      0.00    -0.01       0.00     0.00
 28   1.2943      0.00     0.03       0.00    -0.04
 29   1.9495      0.00    -0.05       0.00     0.03
 30   2.0315      0.00    -0.03       0.00    -0.07
 31   2.0316      0.00     0.01       0.00     0.02
 32   2.3376      0.00    -0.05       0.00    -0.05
 33   3.1372      0.00     0.04       0.00     0.01
 34   3.1400      0.00     0.01       0.00     0.03
 35   3.8141      0.00    -0.07       0.00     0.00
 36   3.8223      0.00     0.05       0.00    -0.00

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.

500879    quality flag:2

Type:     11:4EEEEEE  SCATNEAR11:4EEEEEE

axisobj        58.719    58.719    58.718
ecceobj         0.381     0.381     0.381
incobj         13.753    13.753    13.753
qmin           35.784    35.660    35.751
qmax           83.855    83.986    83.904
amean          59.100    59.100    59.100
amin           58.268    58.315    58.292
amax           60.131    60.154    60.119
emean           0.381     0.380     0.381
emin            0.368     0.363     0.368
emax            0.396     0.397     0.396
imean          12.415    12.511    12.336
imin           11.835    11.638    11.799
imax           12.953    13.368    12.888
excite_mean     0.437     0.437     0.437
fracstop        1.000     1.000     1.000
cjmean          3.039     3.040     3.040

libcent 0       175.9    -180.0     172.5
libamp  0       158.7    -180.0     170.2
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       178.9     183.7     183.7
kozaiamp        180.0     179.9     180.0