Orbit Fit and Astrometric record for 500840

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: 500840    
# Created Fri Dec 15 02:36:51 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   39 observations of   39
# Arc:   3.91y
# First observation: 2013/03/07
#  Last observation: 2017/02/03
# Chi-squared of fit:    23.85 DOF:   72 RMS:  0.14
# Min/Max residuals:    -0.35    0.36
# Exact a, adot, b, bdot, g, gdot:
  1.690790E-05  2.377328E-02 -1.281263E-06 -1.462679E-03  2.411674E-02 -1.240691E-04
# 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
    1.768321 -142.028913    0.770145    0.019372   -0.626254  2456359.054538
# Heliocentric elements and errors
Epoch:              2456358.5000  =  2013/03/07
Mean Anomaly:          330.59694 +/-     0.000
Argument of Peri:      185.41352 +/-     0.000
Long of Asc Node:       63.37560 +/-     0.000
Inclination:             3.90494 +/-     0.000
Eccentricity:         0.04272595 +/-    0.0000
Semi-Major Axis:     43.70242881 +/-    0.0000
Time of Perihelion: 2464977.3008 +/-       0.0
Perihelion:          41.83520081 +/-    0.0000
Aphelion:            45.56965681 +/-    0.0000
Period (y)              288.9127 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -33.63861000 +/-    0.0000
Ecliptic Y          -25.27614737 +/-    0.0000
Ecliptic Z            1.27949037 +/-    0.0000
Ecliptic XDOT         0.00166131 +/-    0.0000
Ecliptic YDOT        -0.00212137 +/-    0.0000
Ecliptic ZDOT        -0.00016627 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.09605666 +/-    0.0000
Geocenter to KBO     41.46499299 +/-    0.0000
# Hcoef:  7.81

The following table shows the complete astrometric record for 500840. 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 (500840) followed by the observatory code and reference code for the source of the astrometry.

2013 03  07.55376  14 24 45.841  -12 29 32.52  24.2r 500840    568  C~1XRZ      
2013 03  07.61085  14 24 45.698  -12 29 31.87  23.5r 500840    568  C~1XRZ      
2013 04  04.55473  14 23 08.662  -12 21 05.05  23.5r 500840    568  C~1XRZ      
2013 04  07.41499  14 22 56.454  -12 20 03.61  24.2r 500840    568  C~1XRZ      
2013 04  07.45875  14 22 56.272  -12 20 02.58  23.9r 500840    568  C~1XRZ      
2013 04  08.44736  14 22 51.972  -12 19 41.22  23.6r 500840    568  C~1XRZ      
2013 04  08.49256  14 22 51.743  -12 19 40.00  24.1r 500840    568  C~1XRZ      
2013 04  09.39399  14 22 47.834  -12 19 20.11  24.1r 500840    568  C~1XRZ      
2013 04  09.43719  14 22 47.647  -12 19 19.22  24.0r 500840    568  C~1XRZ      
2013 04  09.48059  14 22 47.439  -12 19 18.42  23.4r 500840    568  C~1XRZ      
2013 05  11.48217  14 20 20.179  -12 07 21.53  23.7r 500840    568  C~1XRZ      
2013 05  12.48442  14 20 15.656  -12 07 00.19  23.9r 500840    568  C~1XRZ      
2013 06  12.37957  14 18 15.533  -11 57 59.24  24.0r 500840    568  C~1XRa      
2013 06  12.42509  14 18 15.385  -11 57 58.47  24.1r 500840    568  C~1XRa      
2013 07  04.33899  14 17 26.080  -11 54 54.49  24.0r 500840    568  C~1XRa      
2013 07  06.34710  14 17 23.474  -11 54 47.82  23.9r 500840    568  C~1XRa      
2013 08  02.27448  14 17 22.680  -11 56 16.74  24.0r 500840    568  C~1XRa      
2014 02  02.65078  14 30 29.826  -13 03 54.31        500840    568  C~1XRa      
2014 02  02.65647  14 30 29.869  -13 03 54.18  24.1r 500840    568  C~1XRa      
2014 02  03.59530  14 30 30.331  -13 03 54.83  24.4r 500840    568  C~1XRa      
2014 02  24.60122  14 30 19.027  -13 02 24.85  23.9r 500840    568  C~1XRa      
2014 02  25.58427  14 30 17.489  -13 02 15.94  24.0r 500840    568  C~1XRa      
2014 02  28.53222  14 30 12.410  -13 01 46.98  23.9r 500840    568  C~1XRa      
2014 03  28.44948  14 28 50.952  -12 54 41.19  24.1r 500840    568  C~1XRa      
2014 03  28.48858  14 28 50.798  -12 54 40.39  24.0r 500840    568  C~1XRa      
2014 04  04.42723  14 28 23.011  -12 52 21.77  23.8r 500840    568  C~1XRa      
2014 04  04.46649  14 28 22.856  -12 52 20.98  23.8r 500840    568  C~1XRa      
2014 04  05.42266  14 28 18.829  -12 52 01.07  23.9r 500840    568  C~1XRa      
2014 04  05.54119  14 28 18.338  -12 51 58.68  23.6r 500840    568  C~1XRa      
2014 05  22.43816  14 24 45.402  -12 35 08.14  24.0r 500840    568  C~1XRa      
2014 05  25.37427  14 24 33.058  -12 34 12.72  23.9r 500840    568  C~1XRa      
2014 05  25.37889  14 24 33.045  -12 34 12.39  23.8r 500840    568  C~1XRa      
2014 05  25.38376  14 24 33.026  -12 34 12.33  23.5r 500840    568  C~1XRa      
2014 05  25.40152  14 24 32.929  -12 34 12.11  24.0r 500840    568  C~1XRa      
2014 06  26.34216  14 22 49.037  -12 26 56.01  24.0r 500840    568  C~1XRa      
2014 07  18.30511  14 22 21.362  -12 25 47.65  24.0r 500840    568  C~1XRa      
2015 01  26.64799  14 35 31.141  -13 33 31.97  23.9r 500840    568  C~1XRa      
2017 01  31.65143  14 45 59.788  -14 32 48.14  24.6w 500840    568  C~2KOG      
2017 02  03.64785  14 46 02.709  -14 32 57.07        500840    568  C~2KOG      

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     0.03       0.00    -0.10
  2   0.0002      0.00    -0.10       0.00    -0.01
  3   0.0767      0.00     0.12       0.00     0.04
  4   0.0845      0.00     0.06       0.00    -0.15
  5   0.0846      0.00     0.23       0.00    -0.06
  6   0.0873      0.00     0.10       0.00    -0.28
  7   0.0874      0.00    -0.32       0.00    -0.04
  8   0.0899      0.00     0.07       0.00     0.06
  9   0.0900      0.00     0.16       0.00     0.00
 10   0.0901      0.00    -0.04       0.00    -0.15
 11   0.1778      0.00     0.16       0.00    -0.05
 12   0.1805      0.00     0.18       0.00    -0.03
 13   0.2651      0.00     0.03       0.00     0.04
 14   0.2652      0.00    -0.06       0.00     0.22
 15   0.3252      0.00     0.26       0.00     0.14
 16   0.3307      0.00     0.36       0.00     0.16
 17   0.4044      0.00    -0.20       0.00     0.04
 18   0.9092      0.00    -0.35       0.00    -0.13
 19   0.9092      0.00     0.25       0.00     0.01
 20   0.9118      0.00     0.02       0.00     0.00
 21   0.9693      0.00     0.23       0.00     0.08
 22   0.9720      0.00     0.03       0.00     0.09
 23   0.9801      0.00     0.06       0.00     0.01
 24   1.0565      0.00     0.14       0.00    -0.02
 25   1.0566      0.00     0.12       0.00     0.03
 26   1.0756      0.00     0.10       0.00    -0.08
 27   1.0757      0.00     0.28       0.00    -0.09
 28   1.0784      0.00    -0.16       0.00    -0.01
 29   1.0787      0.00     0.11       0.00    -0.08
 30   1.2071      0.00     0.01       0.00    -0.04
 31   1.2151      0.00    -0.09       0.00    -0.19
 32   1.2151      0.00     0.01       0.00     0.05
 33   1.2151      0.00     0.03       0.00     0.02
 34   1.2152      0.00    -0.30       0.00    -0.09
 35   1.3026      0.00     0.01       0.00    -0.17
 36   1.3628      0.00     0.04       0.00    -0.04
 37   1.8894      0.00     0.06       0.00     0.09
 38   3.9044      0.00    -0.08       0.00    -0.13
 39   3.9126      0.00     0.03       0.00     0.20

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.

500840    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.539    43.539    43.539
ecceobj         0.041     0.041     0.041
incobj          3.907     3.907     3.907
qmin           41.355    41.355    41.354
qmax           46.552    46.552    46.553
amean          43.857    43.857    43.857
amin           43.512    43.517    43.515
amax           44.210    44.206    44.209
emean           0.037     0.037     0.037
emin            0.021     0.021     0.021
emax            0.053     0.053     0.053
imean           2.396     2.396     2.396
imin            1.673     1.673     1.673
imax            2.988     2.988     2.988
excite_mean     0.056     0.056     0.056
fracstop        1.000     1.000     1.000
cjmean          3.096     3.096     3.096

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       190.9     190.9     190.9
kozaiamp        180.0     180.0     180.0