Orbit Fit and Astrometric record for 500832

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: 500832    
# Created Fri Dec 15 02:36:51 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   33 observations of   33
# Arc:   4.14y
# First observation: 2013/04/04
#  Last observation: 2017/05/24
# Chi-squared of fit:    34.31 DOF:   60 RMS:  0.18
# Min/Max residuals:    -0.28    1.15
# Exact a, adot, b, bdot, g, gdot:
  1.887237E-05  3.338539E-02  7.315987E-06  1.105369E-02  2.785637E-02 -8.622513E-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
   -0.482050 -147.000941    0.313998   -0.007967   -0.951066  2456386.906608
# Heliocentric elements and errors
Epoch:              2456386.5000  =  2013/04/04
Mean Anomaly:          352.19915 +/-     0.000
Argument of Peri:       36.46361 +/-     0.000
Long of Asc Node:      213.92096 +/-     0.000
Inclination:            18.38497 +/-     0.000
Eccentricity:         0.60716557 +/-    0.0000
Semi-Major Axis:     86.30875674 +/-    0.0000
Time of Perihelion: 2462732.7902 +/-       0.0
Perihelion:          33.90505143 +/-    0.0000
Aphelion:           138.71246206 +/-    0.0000
Period (y)              801.8451 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -31.07382562 +/-    0.0000
Ecliptic Y          -19.80318566 +/-    0.0000
Ecliptic Z           -0.30174026 +/-    0.0000
Ecliptic XDOT         0.00248382 +/-    0.0000
Ecliptic YDOT        -0.00229497 +/-    0.0000
Ecliptic ZDOT         0.00109364 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.84905826 +/-    0.0000
Geocenter to KBO     35.89863697 +/-    0.0000
# Hcoef:  8.18

The following table shows the complete astrometric record for 500832. 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 (500832) followed by the observatory code and reference code for the source of the astrometry.

2013 04  04.40583  14 02 28.172  -12 57 52.95  23.4r 500832    568  C~1XRW      
2013 04  04.44572  14 02 27.984  -12 57 51.59  23.6r 500832    568  C~1XRW      
2013 04  04.48637  14 02 27.790  -12 57 50.14  23.7r 500832    568  C~1XRW      
2013 04  06.57873  14 02 17.993  -12 56 44.84  21.0r 500832    568  C~1XRW      
2013 04  08.37962  14 02 09.477  -12 55 47.61  23.3r 500832    568  C~1XRW      
2013 05  11.41001  13 59 28.459  -12 37 45.14  24.1r 500832    568  C~1XRW      
2013 05  12.41142  13 59 23.839  -12 37 13.39  23.8r 500832    568  C~1XRW      
2013 06  13.24964  13 57 25.330  -12 22 49.86  23.9r 500832    568  C~1XRW      
2013 06  13.29009  13 57 25.223  -12 22 48.97  24.0r 500832    568  C~1XRW      
2014 02  24.56234  14 13 00.534  -13 16 49.33  23.6r 500832    568  C~1XRW      
2014 02  25.53194  14 12 58.770  -13 16 33.52  24.2r 500832    568  C~1XRW      
2014 02  27.64280  14 12 54.590  -13 15 57.71  23.9r 500832    568  C~1XRW      
2014 03  28.43390  14 11 20.390  -13 04 34.14  23.8r 500832    568  C~1XRW      
2014 03  28.47295  14 11 20.223  -13 04 33.04  23.8r 500832    568  C~1XRW      
2014 04  05.40246  14 10 44.849  -13 00 35.00  23.9r 500832    568  C~1XRW      
2014 05  22.38158  14 06 58.462  -12 35 35.80  23.9r 500832    568  C~1XRW      
2014 05  28.36997  14 06 33.683  -12 32 46.18  23.7r 500832    568  C~1XRW      
2014 06  26.31711  14 05 09.603  -12 22 17.71  23.9r 500832    568  C~1XRW      
2014 07  18.28369  14 04 56.203  -12 18 51.73  23.8r 500832    568  C~1XRW      
2015 01  26.61744  14 21 24.901  -13 22 41.56  23.8r 500832    568  C~1XRW      
2015 01  26.63271  14 21 24.912  -13 22 41.47  23.9r 500832    568  C~1XRW      
2015 03  21.61206  14 20 17.069  -13 09 56.87  23.9r 500832    568  C~2KOF      
2016 05  05.32208  14 25 21.502  -12 47 53.34  23.5r 500832    568  C~2KOF      
2016 05  05.39771  14 25 21.107  -12 47 51.07  23.5r 500832    568  C~2KOF      
2016 05  05.40175  14 25 21.087  -12 47 50.89  23.7r 500832    568  C~2KOF      
2016 05  29.34785  14 23 28.026  -12 36 04.23  23.9w 500832    568  C~2KOF      
2017 02  23.64413  14 38 37.304  -13 20 00.87        500832    568  C~2KOF      
2017 02  24.65456  14 38 36.173  -13 19 45.13        500832    568  C~2KOF      
2017 03  27.64565  14 37 13.907  -13 08 12.73        500832    568  C~2KOF      
2017 03  30.53104  14 37 02.258  -13 06 51.31        500832    568  C~2KOF      
2017 05  21.34842  14 32 49.141  -12 40 19.58        500832    568  C~2KOF      
2017 05  24.27564  14 32 35.408  -12 38 57.28        500832    568  C~2KOF      
2017 05  24.35116  14 32 35.069  -12 38 55.02        500832    568  C~2KOF      

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    -0.20       0.00     1.15
  2   0.0001      0.00     0.01       0.00    -0.11
  3   0.0002      0.00    -0.01       0.00     0.08
  4   0.0059      0.00     0.10       0.00    -0.14
  5   0.0109      0.00     0.25       0.00     0.03
  6   0.1013      0.00     0.07       0.00    -0.00
  7   0.1041      0.00     0.03       0.00     0.00
  8   0.1912      0.00    -0.00       0.00    -0.08
  9   0.1913      0.00     0.03       0.00    -0.05
 10   0.8930      0.00    -0.04       0.00    -0.20
 11   0.8956      0.00     0.02       0.00    -0.09
 12   0.9014      0.00     0.06       0.00    -0.09
 13   0.9802      0.00     0.01       0.00     0.04
 14   0.9803      0.00     0.06       0.00     0.01
 15   1.0020      0.00     0.11       0.00     0.26
 16   1.1307      0.00     0.03       0.00    -0.00
 17   1.1471      0.00     0.00       0.00     0.04
 18   1.2263      0.00     0.11       0.00     0.05
 19   1.2865      0.00     0.04       0.00     0.29
 20   1.8130      0.00     0.06       0.00     0.00
 21   1.8131      0.00    -0.12       0.00     0.10
 22   1.9609      0.00     0.00       0.00     0.07
 23   3.0853      0.00     0.15       0.00    -0.17
 24   3.0855      0.00     0.07       0.00    -0.28
 25   3.0855      0.00     0.09       0.00    -0.23
 26   3.1511      0.00    -0.13       0.00    -0.06
 27   3.8911      0.00    -0.03       0.00    -0.10
 28   3.8939      0.00    -0.08       0.00    -0.06
 29   3.9788      0.00     0.13       0.00    -0.02
 30   3.9867      0.00    -0.04       0.00     0.02
 31   4.1285      0.00    -0.01       0.00     0.08
 32   4.1365      0.00     0.01       0.00     0.02
 33   4.1367      0.00     0.28       0.00     0.19

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.

500832    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        85.618    85.616    85.619
ecceobj         0.605     0.605     0.605
incobj         18.414    18.414    18.414
qmin           32.296    32.148    32.240
qmax          146.003   144.550   155.333
amean          85.986    85.223    88.398
amin           82.533    82.479    84.198
amax           89.561    89.080    94.801
emean           0.608     0.605     0.618
emin            0.582     0.584     0.599
emax            0.630     0.626     0.640
imean          18.462    18.329    18.479
imin           16.971    16.668    17.026
imax           20.125    19.751    20.146
excite_mean     0.685     0.682     0.695
fracstop        1.000     1.000     1.000
cjmean          2.895     2.895     2.894

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       168.9     161.4     180.0
kozaiamp        179.9     180.0     179.9