Orbit Fit and Astrometric record for 500834

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: 500834    
# Created Sat Dec 16 02:36:54 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   40 observations of   40
# Arc:   4.22y
# First observation: 2013/03/07
#  Last observation: 2017/05/28
# Chi-squared of fit:    22.02 DOF:   74 RMS:  0.13
# Min/Max residuals:    -0.24    0.69
# Exact a, adot, b, bdot, g, gdot:
  1.307371E-05  1.855665E-02 -3.031909E-06 -3.219468E-03  2.222099E-02  1.641714E-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
    1.201470 -140.849553    0.782738    0.012843   -0.610616  2456359.067598
# Heliocentric elements and errors
Epoch:              2456358.5000  =  2013/03/07
Mean Anomaly:          152.80730 +/-     0.000
Argument of Peri:       12.42007 +/-     0.000
Long of Asc Node:       44.97659 +/-     0.000
Inclination:             9.89550 +/-     0.000
Eccentricity:         0.18098937 +/-    0.0000
Semi-Major Axis:     39.10788471 +/-    0.0000
Time of Perihelion: 2418441.2769 +/-       0.0
Perihelion:          32.02977314 +/-    0.0000
Aphelion:            46.18599628 +/-    0.0000
Period (y)              244.5708 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -35.85792377 +/-    0.0000
Ecliptic Y          -28.18301141 +/-    0.0000
Ecliptic Z            0.94349297 +/-    0.0000
Ecliptic XDOT         0.00127399 +/-    0.0000
Ecliptic YDOT        -0.00190530 +/-    0.0000
Ecliptic ZDOT        -0.00039221 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.61753003 +/-    0.0000
Geocenter to KBO     45.00246823 +/-    0.0000
# Hcoef:  7.26

The following table shows the complete astrometric record for 500834. 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 (500834) followed by the observatory code and reference code for the source of the astrometry.

2013 03  07.56682  14 28 36.442  -13 24 21.03  24.5r 500834    568  C~1XRX      
2013 03  07.61868  14 28 36.297  -13 24 20.49  23.7r 500834    568  C~1XRX      
2013 04  04.56271  14 27 03.906  -13 17 11.78  23.6r 500834    568  C~1XRX      
2013 04  07.42293  14 26 52.301  -13 16 18.37  23.8r 500834    568  C~1XRX      
2013 04  07.48157  14 26 52.059  -13 16 17.17  23.7r 500834    568  C~1XRX      
2013 04  07.48656  14 26 52.023  -13 16 16.97  23.7r 500834    568  C~1XRX      
2013 04  07.50053  14 26 51.978  -13 16 16.67  23.4r 500834    568  C~1XRX      
2013 04  08.45527  14 26 48.029  -13 15 58.58  23.1r 500834    568  C~1XRX      
2013 04  08.50045  14 26 47.840  -13 15 57.68  23.3r 500834    568  C~1XRX      
2013 04  08.50934  14 26 47.796  -13 15 57.52  22.9r 500834    568  C~1XRX      
2013 04  08.54607  14 26 47.680  -13 15 56.66  24.1r 500834    568  C~1XRX      
2013 04  09.40177  14 26 44.100  -13 15 40.42  23.8r 500834    568  C~1XRX      
2013 04  09.44495  14 26 43.911  -13 15 39.66  24.1r 500834    568  C~1XRX      
2013 04  09.48873  14 26 43.720  -13 15 38.81  23.9r 500834    568  C~1XRX      
2013 04  09.49693  14 26 43.697  -13 15 38.69  23.2r 500834    568  C~1XRX      
2013 04  09.50177  14 26 43.675  -13 15 38.58  23.6r 500834    568  C~1XRX      
2013 04  09.50867  14 26 43.638  -13 15 38.47  23.6r 500834    568  C~1XRX      
2013 04  09.53112  14 26 43.544  -13 15 37.92  23.6r 500834    568  C~1XRX      
2013 04  10.50021  14 26 39.488  -13 15 19.22  23.9r 500834    568  C~1XRX      
2013 04  10.54048  14 26 39.310  -13 15 18.53  24.0r 500834    568  C~1XRX      
2013 05  11.49012  14 24 22.926  -13 05 01.65  23.6r 500834    568  C~1XRX      
2013 07  06.27023  14 21 28.192  -12 53 13.60  24.0r 500834    568  C~1XRX      
2013 08  02.28256  14 21 21.206  -12 54 11.63  23.7r 500834    568  C~1XRX      
2013 08  05.28429  14 21 24.160  -12 54 36.95  23.9r 500834    568  C~1XRX      
2014 02  24.59345  14 32 52.355  -13 56 30.48  24.2r 500834    568  C~1XRX      
2014 02  28.52445  14 32 45.886  -13 56 01.82  23.3r 500834    568  C~1XRX      
2014 04  04.43513  14 31 01.043  -13 48 09.20  23.8r 500834    568  C~1XRX      
2014 04  04.47439  14 31 00.882  -13 48 08.57  24.2r 500834    568  C~1XRX      
2014 04  05.55924  14 30 56.549  -13 47 49.12  23.7r 500834    568  C~1XRX      
2014 05  22.43425  14 27 33.153  -13 32 48.55  24.0r 500834    568  C~1XRX      
2014 06  26.33823  14 25 39.151  -13 25 05.33  24.1r 500834    568  C~1XRX      
2014 07  18.31323  14 25 09.128  -13 23 45.80  24.0r 500834    568  C~1XRX      
2016 05  10.32654  14 36 16.640  -14 37 41.53  23.3r 500834    568  C~2KOF      
2016 05  10.40239  14 36 16.306  -14 37 40.29  21.9r 500834    568  C~2KOF      
2016 05  29.35189  14 34 56.272  -14 32 03.13  23.9w 500834    568  C~2KOF      
2017 01  31.65143  14 44 41.880  -15 25 49.32  24.2w 500834    568  C~2KOF      
2017 02  03.64785  14 44 44.036  -15 26 02.98        500834    568  C~2KOF      
2017 02  23.64639  14 44 37.835  -15 25 59.05        500834    568  C~2KOF      
2017 05  28.35383  14 38 58.781  -15 02 38.00  23.8r 500834    568  C~2KOF      
2017 05  28.41896  14 38 58.515  -15 02 36.91  23.8r 500834    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    -0.17       0.00     0.69
  2   0.0001      0.00    -0.11       0.00     0.08
  3   0.0766      0.00    -0.05       0.00    -0.06
  4   0.0845      0.00     0.06       0.00    -0.19
  5   0.0846      0.00     0.12       0.00    -0.10
  6   0.0847      0.00    -0.11       0.00     0.00
  7   0.0847      0.00     0.10       0.00     0.04
  8   0.0873      0.00    -0.00       0.00    -0.02
  9   0.0874      0.00     0.03       0.00     0.02
 10   0.0875      0.00    -0.07       0.00     0.01
 11   0.0876      0.00     0.52       0.00     0.16
 12   0.0899      0.00     0.11       0.00     0.02
 13   0.0900      0.00     0.03       0.00    -0.05
 14   0.0901      0.00    -0.03       0.00    -0.04
 15   0.0902      0.00     0.15       0.00    -0.08
 16   0.0902      0.00     0.12       0.00    -0.06
 17   0.0902      0.00     0.01       0.00    -0.08
 18   0.0903      0.00     0.04       0.00     0.03
 19   0.0929      0.00     0.17       0.00     0.05
 20   0.0930      0.00     0.09       0.00    -0.04
 21   0.1778      0.00     0.01       0.00    -0.10
 22   0.3305      0.00     0.00       0.00    -0.03
 23   0.4044      0.00     0.01       0.00     0.04
 24   0.4126      0.00    -0.08       0.00    -0.09
 25   0.9693      0.00    -0.02       0.00     0.08
 26   0.9800      0.00     0.04       0.00    -0.01
 27   1.0756      0.00     0.04       0.00     0.10
 28   1.0757      0.00     0.00       0.00     0.04
 29   1.0787      0.00     0.03       0.00    -0.01
 30   1.2070      0.00     0.08       0.00    -0.19
 31   1.3026      0.00    -0.10       0.00    -0.07
 32   1.3628      0.00     0.01       0.00     0.08
 33   3.1752      0.00    -0.00       0.00     0.01
 34   3.1755      0.00     0.13       0.00    -0.18
 35   3.2273      0.00     0.16       0.00    -0.00
 36   3.9044      0.00     0.01       0.00     0.10
 37   3.9126      0.00     0.12       0.00    -0.24
 38   3.9674      0.00    -0.20       0.00    -0.01
 39   4.2239      0.00     0.03       0.00     0.11
 40   4.2241      0.00     0.04       0.00     0.12

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.

500834    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        38.988    38.988    38.987
ecceobj         0.183     0.183     0.183
incobj          9.911     9.911     9.911
qmin           30.372    30.407    30.377
qmax           49.360    49.469    49.477
amean          39.458    39.458    39.458
amin           38.854    38.879    38.874
amax           40.133    40.124    40.128
emean           0.196     0.196     0.196
emin            0.154     0.154     0.154
emax            0.232     0.234     0.234
imean           6.656     6.680     6.663
imin            4.196     4.540     4.469
imax            9.616     9.613     9.619
excite_mean     0.229     0.229     0.229
fracstop        1.000     1.000     1.000
cjmean          2.992     2.991     2.992

libcent 0       180.5     180.4     180.7
libamp  0       139.4     139.2     139.5
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       183.4     187.8     186.3
kozaiamp        180.0     180.0     180.0