Orbit Fit and Astrometric record for 11JX31

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: 11JX31    
# Created Tue Dec 12 02:37:45 2017
# Orbit generated from Bernstein formalism
# Fitting   75 observations of   75
# Arc:   3.17y
# First observation: 2011/04/28
#  Last observation: 2014/06/27
Preliminary a, adot, b, bdot, g, gdot:
  -0.000067   0.019398   0.000002  -0.000841   0.021662   0.000000
# Chi-squared of fit:    17.38 DOF:  144 RMS:  0.09
# Min/Max residuals:    -0.37    0.20
# Exact a, adot, b, bdot, g, gdot:
  1.428592E-05  1.930823E-02 -4.359261E-07 -8.378915E-04  2.162008E-02  2.389493E-03
# Covariance matrix:
  5.1887E-14 -9.0482E-14 -9.6016E-16  4.0734E-15  3.5270E-14 -1.8922E-12
 -9.0482E-14  5.1285E-13  3.8355E-15 -2.4695E-14  1.9117E-14  1.1285E-11
 -9.6016E-16  3.8355E-15  2.6295E-14 -1.2199E-14 -8.6843E-16  9.0444E-14
  4.0734E-15 -2.4695E-14 -1.2199E-14  2.2358E-14 -5.7352E-16 -5.6765E-13
  3.5270E-14  1.9117E-14 -8.6843E-16 -5.7352E-16  1.1278E-13  1.7212E-13
 -1.8922E-12  1.1285E-11  9.0444E-14 -5.6765E-13  1.7212E-13  2.5961E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.268487  -82.470649    0.876423    0.019839   -0.501411  2455679.747046
# Heliocentric elements and errors
Epoch:              2455670.5000  =  2011/04/19
Mean Anomaly:          105.80323 +/-     0.264
Argument of Peri:       19.86622 +/-     0.237
Long of Asc Node:      139.15876 +/-     0.005
Inclination:             3.30665 +/-     0.000
Eccentricity:         0.10946267 +/-    0.0007
Semi-Major Axis:     44.94720440 +/-    0.0114
Time of Perihelion: 2423322.3922 +/-      79.8
Perihelion:          40.02716354 +/-    0.0314
Aphelion:            49.86724526 +/-    0.0323
Period (y)              301.3438 +/-      0.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            5.25756632 +/-    0.0001
Ecliptic Y          -46.43079158 +/-    0.0007
Ecliptic Z            1.83079775 +/-    0.0000
Ecliptic XDOT         0.00246228 +/-    0.0000
Ecliptic YDOT         0.00002242 +/-    0.0000
Ecliptic ZDOT        -0.00009401 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.76336419 +/-    0.0007
Geocenter to KBO     46.25329558 +/-    0.0007
# Hcoef:  8.22

The following table shows the complete astrometric record for 11JX31. 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 (11JX31) followed by the observatory code and reference code for the source of the astrometry.

2011 04  28.24628  18 32 14.39   -20 57 37.4         11JX31    268  C~0mPC      
2011 04  28.24697  18 32 14.39   -20 57 37.4         11JX31    268  C~0mPC      
2011 04  28.34316  18 32 14.20   -20 57 37.3         11JX31    268  C~0mPC      
2011 04  28.41825  18 32 14.06   -20 57 37.2         11JX31    268  C~0mPC      
2011 04  28.42020  18 32 14.06   -20 57 37.3         11JX31    268  C~0mPC      
2011 04  30.32115  18 32 10.34   -20 57 36.1         11JX31    268  C~0mPC      
2011 04  30.41312  18 32 10.14   -20 57 36.2         11JX31    268  C~0mPC      
2011 05  01.31844  18 32 08.27   -20 57 35.5         11JX31    268  C~0mPC      
2011 05  02.28342  18 32 06.18   -20 57 35.2         11JX31    268  C~0mPC      
2011 05  02.28856  18 32 06.18   -20 57 35.2         11JX31    268  C~0mPC      
2011 05  02.30851  18 32 06.13   -20 57 35.2         11JX31    268  C~0mPC      
2011 05  02.32221  18 32 06.10   -20 57 35.2         11JX31    268  C~0mPC      
2011 05  02.33338  18 32 06.07   -20 57 35.2         11JX31    268  C~0mPC      
2011 05  02.35124  18 32 06.03   -20 57 35.2         11JX31    268  C~0mPC      
2011 05  03.28524  18 32 03.95   -20 57 34.9         11JX31    268  C~0mPC      
2011 05  03.29159  18 32 03.94   -20 57 34.9         11JX31    268  C~0mPC      
2011 05  03.30873  18 32 03.89   -20 57 34.9         11JX31    268  C~0mPC      
2011 05  03.32932  18 32 03.84   -20 57 34.9         11JX31    268  C~0mPC      
2011 05  03.34419  18 32 03.81   -20 57 34.9         11JX31    268  C~0mPC      
2011 05  03.36010  18 32 03.78   -20 57 34.9         11JX31    268  C~0mPC      
2011 05  03.36568  18 32 03.76   -20 57 34.9         11JX31    268  C~0mPC      
2011 05  27.26022  18 30 49.65   -20 57 52.8         11JX31    268  C~0mPC      
2011 05  27.30855  18 30 49.46   -20 57 52.9         11JX31    268  C~0mPC      
2011 05  28.25106  18 30 45.86   -20 57 54.7         11JX31    268  C~0mPC      
2011 05  28.28379  18 30 45.72   -20 57 54.5         11JX31    268  C~0mPC      
2011 05  28.31437  18 30 45.60   -20 57 54.7         11JX31    268  C~0mPC      
2011 05  28.34773  18 30 45.47   -20 57 54.6         11JX31    268  C~0mPC      
2011 05  28.37857  18 30 45.34   -20 57 54.7         11JX31    268  C~0mPC      
2011 05  29.54954  18 30 40.76   -20 57 57.4         11JX31    266  C~0mPC      
2011 05  29.56900  18 30 40.71   -20 57 56.9         11JX31    266  C~0mPC      
2011 05  30.42203  18 30 37.34   -20 57 58.7         11JX31    266  C~0mPC      
2011 05  30.47860  18 30 37.12   -20 57 58.8         11JX31    266  C~0mPC      
2011 05  30.48977  18 30 37.07   -20 57 58.8         11JX31    266  C~0mPC      
2011 05  31.20533  18 30 34.22   -20 58 00.1         11JX31    268  C~0mPC      
2011 05  31.27397  18 30 33.94   -20 58 00.2         11JX31    268  C~0mPC      
2011 05  31.34517  18 30 33.65   -20 58 00.4         11JX31    268  C~0mPC      
2011 06  01.51361  18 30 28.95   -20 58 02.9         11JX31    266  C~0mPC      
2011 06  01.53319  18 30 28.87   -20 58 02.9         11JX31    266  C~0mPC      
2011 06  04.10625  18 30 18.28   -20 58 08.4         11JX31    268  C~0mPC      
2011 07  01.08124  18 28 16.85   -20 59 31.7         11JX31    269  C~0mPC      
2011 07  01.09756  18 28 16.77   -20 59 31.8         11JX31    269  C~0mPC      
2011 07  01.10007  18 28 16.77   -20 59 31.8         11JX31    269  C~0mPC      
2011 07  01.18443  18 28 16.35   -20 59 32.1         11JX31    269  C~0mPC      
2011 07  01.18502  18 28 16.35   -20 59 32.1         11JX31    269  C~0mPC      
2011 07  01.26959  18 28 15.96   -20 59 32.5   24.5R 11JX31    269  C~0mPC      
2011 07  01.27016  18 28 15.96   -20 59 32.5         11JX31    269  C~0mPC      
2011 07  02.28855  18 28 11.25   -20 59 36.4         11JX31    266  C~0mPC      
2011 07  02.32100  18 28 11.10   -20 59 36.5         11JX31    266  C~0mPC      
2011 07  02.35039  18 28 10.96   -20 59 36.7         11JX31    266  C~0mPC      
2011 07  02.37545  18 28 10.85   -20 59 36.8         11JX31    266  C~0mPC      
2011 07  02.41278  18 28 10.67   -20 59 36.9         11JX31    266  C~0mPC      
2011 07  02.44216  18 28 10.52   -20 59 37.0         11JX31    266  C~0mPC      
2011 08  29.06569  18 24 41.06   -21 03 46.4         11JX31    269  C~0mPC      
2011 08  29.12961  18 24 40.92   -21 03 46.4         11JX31    269  C~0mPC      
2012 04  20.32039  18 37 08.59   -20 56 39.1         11JX31    268  C~0mPC      
2012 04  20.32108  18 37 08.59   -20 56 39.1         11JX31    268  C~0mPC      
2012 04  20.36175  18 37 08.54   -20 56 39.1         11JX31    268  C~0mPC      
2012 04  20.36290  18 37 08.53   -20 56 39.2         11JX31    268  C~0mPC      
2012 04  20.40652  18 37 08.48   -20 56 38.9         11JX31    268  C~0mPC      
2012 04  20.40822  18 37 08.47   -20 56 39.0         11JX31    268  C~0mPC      
2012 04  21.31792  18 37 07.38   -20 56 38.0         11JX31    268  C~0mPC      
2012 04  21.32330  18 37 07.38   -20 56 37.9         11JX31    268  C~0mPC      
2012 04  21.36949  18 37 07.31   -20 56 37.9         11JX31    268  C~0mPC      
2012 04  21.37086  18 37 07.31   -20 56 37.9         11JX31    268  C~0mPC      
2012 04  21.37979  18 37 07.29   -20 56 37.9         11JX31    268  C~0mPC      
2012 04  21.40780  18 37 07.25   -20 56 37.8         11JX31    268  C~0mPC      
2012 04  21.40842  18 37 07.25   -20 56 37.8         11JX31    268  C~0mPC      
2014 06  25.39596  18 42 59.419  -20 55 33.85        11JX31    266  C~2Gt7      
2014 06  25.42877  18 42 59.270  -20 55 33.96        11JX31    266  C~2Gt7      
2014 06  25.44300  18 42 59.195  -20 55 34.08        11JX31    266  C~2Gt7      
2014 06  25.49307  18 42 58.964  -20 55 34.27        11JX31    266  C~2Gt7      
2014 06  25.51719  18 42 58.853  -20 55 34.40        11JX31    266  C~2Gt7      
2014 06  25.53618  18 42 58.766  -20 55 34.50        11JX31    266  C~2Gt7      
2014 06  27.36077  18 42 50.388  -20 55 43.66        11JX31    266  C~2Gt7      
2014 06  27.37167  18 42 50.341  -20 55 43.69        11JX31    266  C~2Gt7      

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    -0.04
  2   0.0000      0.00    -0.02       0.00    -0.04
  3   0.0003     -2.65    -0.06       0.25     0.01
  4   0.0005     -4.60     0.03       0.46     0.05
  5   0.0005     -4.61     0.08       0.36    -0.05
  6   0.0057    -56.57     0.07       4.46    -0.00
  7   0.0059    -59.37    -0.01       4.52    -0.15
  8   0.0084    -85.49     0.10       6.68     0.12
  9   0.0111   -114.70    -0.09       8.60     0.05
 10   0.0111   -114.70     0.08       8.60     0.04
 11   0.0111   -115.40     0.01       8.64     0.04
 12   0.0112   -115.82     0.02       8.67     0.03
 13   0.0112   -116.24    -0.04       8.69     0.03
 14   0.0112   -116.80    -0.03       8.72     0.03
 15   0.0138   -145.87     0.01      10.64     0.03
 16   0.0138   -146.01     0.07      10.65     0.03
 17   0.0139   -146.71    -0.06      10.69     0.04
 18   0.0139   -147.41    -0.09      10.72     0.03
 19   0.0140   -147.83    -0.02      10.75     0.03
 20   0.0140   -148.25     0.09      10.77     0.02
 21   0.0140   -148.53    -0.01      10.79     0.02
 22   0.0794  -1186.05    -0.09      49.57    -0.03
 23   0.0796  -1188.71    -0.11      49.61    -0.04
 24   0.0821  -1239.16     0.13      50.52    -0.21
 25   0.0822  -1241.11    -0.01      50.82     0.06
 26   0.0823  -1242.80    -0.01      50.71    -0.09
 27   0.0824  -1244.61     0.02      50.91     0.07
 28   0.0825  -1246.44    -0.10      50.91     0.02
 29   0.0857  -1310.64    -0.34      51.64    -0.36
 30   0.0858  -1311.32     0.08      52.17     0.16
 31   0.0881  -1358.55    -0.10      52.89    -0.01
 32   0.0882  -1361.63     0.02      52.96     0.00
 33   0.0883  -1362.33    -0.04      53.00     0.03
 34   0.0902  -1402.27    -0.03      53.82    -0.01
 35   0.0904  -1406.19    -0.03      53.93     0.03
 36   0.0906  -1410.25    -0.02      53.95    -0.03
 37   0.0938  -1476.13     0.15      54.95     0.01
 38   0.0939  -1477.25     0.17      55.01     0.05
 39   0.1009  -1625.67     0.02      57.37     0.02
 40   0.1748  -3328.65    -0.02      61.29     0.02
 41   0.1748  -3329.78    -0.06      61.25    -0.01
 42   0.1748  -3329.78     0.10      61.25    -0.01
 43   0.1751  -3335.67    -0.20      61.24     0.04
 44   0.1751  -3335.67    -0.16      61.24     0.04
 45   0.1753  -3341.14    -0.04      61.11    -0.06
 46   0.1753  -3341.14    -0.00      61.11    -0.06
 47   0.1781  -3407.23     0.07      60.49     0.05
 48   0.1782  -3409.34     0.11      60.49     0.08
 49   0.1782  -3411.31     0.08      60.39     0.00
 50   0.1783  -3412.85     0.20      60.36    -0.00
 51   0.1784  -3415.37     0.15      60.39     0.05
 52   0.1785  -3417.48    -0.01      60.39     0.07
 53   0.3363  -6360.29     0.06     -51.68    -0.37
 54   0.3364  -6362.25    -0.13     -51.60    -0.10
 55   0.9804   4117.89     0.05    -187.60     0.03
 56   0.9804   4117.89     0.06    -187.60     0.03
 57   0.9805   4117.19     0.07    -187.55    -0.02
 58   0.9805   4117.04    -0.06    -187.64    -0.11
 59   0.9806   4116.36     0.02    -187.30     0.13
 60   0.9806   4116.21    -0.10    -187.39     0.04
 61   0.9831   4101.03     0.04    -185.42    -0.03
 62   0.9831   4101.04     0.14    -185.32     0.05
 63   0.9832   4100.06     0.02    -185.26     0.01
 64   0.9832   4100.06     0.05    -185.26     0.01
 65   0.9833   4099.78    -0.07    -185.24     0.01
 66   0.9833   4099.23    -0.10    -185.11     0.08
 67   0.9833   4099.23    -0.09    -185.11     0.08
 68   3.1599   9031.20     0.01    -457.01    -0.04
 69   3.1600   9029.10     0.07    -456.97     0.01
 70   3.1600   9028.04    -0.06    -457.01    -0.03
 71   3.1602   9024.80    -0.02    -456.96     0.03
 72   3.1602   9023.23     0.00    -456.98     0.01
 73   3.1603   9022.01     0.02    -456.99    -0.00
 74   3.1653   8904.05    -0.04    -457.62    -0.03
 75   3.1653   8903.39     0.01    -457.60    -0.01

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.

11JX31    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.764    44.798    44.731
ecceobj         0.110     0.112     0.108
incobj          3.308     3.308     3.308
qmin           39.126    39.073    39.212
qmax           51.163    51.327    51.094
amean          45.015    45.052    44.980
amin           44.650    44.683    44.612
amax           45.412    45.471    45.384
emean           0.112     0.114     0.110
emin            0.097     0.100     0.095
emax            0.127     0.130     0.126
imean           2.414     2.392     2.422
imin            1.735     1.689     1.750
imax            3.146     3.142     3.146
excite_mean     0.120     0.122     0.118
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       190.3     186.3     190.9
kozaiamp        180.0     180.0     179.9