Orbit Fit and Astrometric record for 500883

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: 500883    
# Created Sat Dec 16 02:36:55 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   32 observations of   32
# Arc:   3.15y
# First observation: 2013/04/10
#  Last observation: 2016/06/03
# Chi-squared of fit:    15.47 DOF:   58 RMS:  0.12
# Min/Max residuals:    -0.28    0.59
# Exact a, adot, b, bdot, g, gdot:
  1.379802E-05  2.198435E-02  4.256274E-06  6.993870E-03  2.487801E-02  6.421119E-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
    9.099299 -118.321000    0.656682    0.120031   -0.749332  2456393.093828
# Heliocentric elements and errors
Epoch:              2456392.5000  =  2013/04/10
Mean Anomaly:           84.91170 +/-     0.000
Argument of Peri:      273.35635 +/-     0.000
Long of Asc Node:      214.93494 +/-     0.000
Inclination:            19.84427 +/-     0.000
Eccentricity:         0.25729117 +/-    0.0000
Semi-Major Axis:     39.28778931 +/-    0.0000
Time of Perihelion: 2435177.1683 +/-       0.0
Perihelion:          29.17938800 +/-    0.0000
Aphelion:            49.39619062 +/-    0.0000
Period (y)              246.2604 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -19.76645153 +/-    0.0000
Ecliptic Y          -35.29372997 +/-    0.0000
Ecliptic Z            6.35706714 +/-    0.0000
Ecliptic XDOT         0.00185023 +/-    0.0000
Ecliptic YDOT        -0.00165453 +/-    0.0000
Ecliptic ZDOT         0.00087189 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.94825540 +/-    0.0000
Geocenter to KBO     40.19600811 +/-    0.0000
# Hcoef:  7.51

The following table shows the complete astrometric record for 500883. 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 (500883) followed by the observatory code and reference code for the source of the astrometry.

2013 04  10.59305  16 05 44.228  -11 34 32.42  23.5r 500883    568  C~1XRf      
2013 04  19.46408  16 05 11.678  -11 31 05.88  23.5r 500883    568  C~1XRf      
2013 04  19.51699  16 05 11.462  -11 31 04.57  23.6r 500883    568  C~1XRf      
2013 05  08.45126  16 03 48.186  -11 23 57.48  23.3r 500883    568  C~1XRf      
2013 05  08.49533  16 03 47.978  -11 23 56.51  23.6r 500883    568  C~1XRf      
2013 05  08.53916  16 03 47.764  -11 23 55.65  23.4r 500883    568  C~1XRf      
2013 05  09.54622  16 03 42.955  -11 23 34.03  23.3r 500883    568  C~1XRf      
2013 05  10.55178  16 03 38.128  -11 23 12.73  23.4r 500883    568  C~1XRf      
2013 06  04.42264  16 01 35.992  -11 15 31.64  23.8r 500883    568  C~1XRf      
2013 06  06.42067  16 01 26.360  -11 15 01.70        500883    568  C~1XRf      
2013 06  06.44917  16 01 26.230  -11 15 01.16        500883    568  C~1XRf      
2013 07  02.37291  15 59 34.772  -11 10 27.96  23.5r 500883    568  C~1XRf      
2013 07  04.36382  15 59 27.648  -11 10 16.81  23.5r 500883    568  C~1XRf      
2013 08  01.25882  15 58 18.943  -11 10 15.12  23.6r 500883    568  C~1XRf      
2013 08  01.31670  15 58 18.880  -11 10 15.27  24.0r 500883    568  C~1XRf      
2013 08  02.30664  15 58 17.643  -11 10 20.60  23.7r 500883    568  C~1XRf      
2013 08  05.29659  15 58 14.463  -11 10 38.34  23.5r 500883    568  C~1XRf      
2014 03  06.61642  16 12 06.467  -11 37 53.80  23.7r 500883    568  C~1XRf      
2014 03  07.59105  16 12 06.265  -11 37 35.82  23.5r 500883    568  C~1XRf      
2014 05  01.42971  16 09 42.689  -11 17 33.77  23.4r 500883    568  C~1XRf      
2014 05  01.48091  16 09 42.457  -11 17 32.70  23.3r 500883    568  C~1XRf      
2014 05  01.54140  16 09 42.182  -11 17 31.35  23.6r 500883    568  C~1XRf      
2014 05  04.42726  16 09 29.188  -11 16 28.04  23.8r 500883    568  C~1XRf      
2014 05  04.47771  16 09 28.950  -11 16 27.02  23.6r 500883    568  C~1XRf      
2014 05  04.52933  16 09 28.709  -11 16 25.77  23.2r 500883    568  C~1XRf      
2014 05  22.52578  16 08 02.460  -11 10 22.54  23.4r 500883    568  C~1XRf      
2014 05  25.48500  16 07 47.853  -11 09 29.09  23.2r 500883    568  C~1XRf      
2014 07  01.39490  16 05 00.175  -11 01 58.91  23.6r 500883    568  C~1XRf      
2014 07  18.34503  16 04 05.594  -11 01 09.91  23.5r 500883    568  C~1XRf      
2015 03  22.59933  16 17 04.877  -11 23 13.82  23.4r 500883    568  C~1XRf      
2016 05  29.38051  16 17 58.748  -10 49 50.51  23.7w 500883    568  C~2LSW      
2016 06  03.42065  16 17 34.163  -10 48 35.02  23.5w 500883    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     0.59
  2   0.0243      0.00     0.11       0.00    -0.04
  3   0.0244      0.00     0.07       0.00     0.04
  4   0.0763      0.00     0.02       0.00     0.04
  5   0.0764      0.00     0.11       0.00     0.06
  6   0.0765      0.00     0.08       0.00    -0.03
  7   0.0793      0.00     0.03       0.00     0.03
  8   0.0820      0.00    -0.03       0.00    -0.04
  9   0.1501      0.00     0.05       0.00    -0.05
 10   0.1556      0.00    -0.09       0.00    -0.28
 11   0.1557      0.00     0.05       0.00    -0.17
 12   0.2266      0.00     0.19       0.00     0.06
 13   0.2321      0.00     0.23       0.00     0.03
 14   0.3085      0.00    -0.18       0.00     0.07
 15   0.3086      0.00     0.07       0.00     0.21
 16   0.3113      0.00     0.01       0.00     0.07
 17   0.3195      0.00     0.02       0.00     0.10
 18   0.9036      0.00     0.15       0.00     0.05
 19   0.9062      0.00     0.06       0.00    -0.02
 20   1.0564      0.00    -0.01       0.00    -0.14
 21   1.0565      0.00    -0.01       0.00    -0.20
 22   1.0567      0.00    -0.02       0.00    -0.18
 23   1.0646      0.00     0.05       0.00    -0.03
 24   1.0647      0.00    -0.00       0.00    -0.10
 25   1.0648      0.00    -0.02       0.00     0.03
 26   1.1141      0.00     0.15       0.00    -0.05
 27   1.1222      0.00     0.14       0.00     0.01
 28   1.2233      0.00     0.00       0.00     0.01
 29   1.2697      0.00     0.11       0.00    -0.01
 30   1.9466      0.00    -0.03       0.00     0.12
 31   3.1343      0.00     0.06       0.00    -0.00
 32   3.1481      0.00     0.08       0.00     0.03

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.

500883    quality flag:3

Type:           3:2E      3:2E      3:2E
Type:          6:4II     6:4II     6:4II

axisobj        39.159    39.159    39.158
ecceobj         0.255     0.255     0.255
incobj         19.880    19.880    19.880
qmin           28.273    28.275    28.272
qmax           51.050    51.040    51.059
amean          39.454    39.454    39.454
amin           39.099    39.099    39.099
amax           39.876    39.883    39.881
emean           0.252     0.252     0.252
emin            0.218     0.218     0.218
emax            0.281     0.281     0.281
imean          20.459    20.459    20.459
imin           19.279    19.279    19.279
imax           21.448    21.449    21.448
excite_mean     0.431     0.431     0.431
fracstop        1.000     1.000     1.000
cjmean          2.838     2.838     2.838

libcent 0       179.6     179.8     179.5
libamp  0        33.7      34.0      33.7
libcent 1       179.5     179.5     180.5
libamp  1       102.0     102.7     102.0
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       270.2     270.2     270.2
kozaiamp         25.7      25.7      25.7