Orbit Fit and Astrometric record for 13EC138

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: 13EC138   
# Created Fri Jul 20 01:38:02 2018
# Orbit generated from Bernstein formalism
# Fitting   49 observations of   49
# Arc:  13.30y
# First observation: 2001/12/20
#  Last observation: 2015/04/10
Preliminary a, adot, b, bdot, g, gdot:
  -0.000903   0.025301   0.000142  -0.003491   0.029447   0.000000
# Chi-squared of fit:    25.40 DOF:   92 RMS:  0.13
# Min/Max residuals:    -0.28    0.37
# Exact a, adot, b, bdot, g, gdot:
  1.600940E-05  2.367552E-02 -1.739107E-06 -3.316553E-03  2.384867E-02 -2.090875E-03
# Covariance matrix:
  4.8817E-13 -8.2868E-14 -6.5248E-15  6.7381E-15 -4.3644E-14 -1.3908E-13
 -8.2868E-14  5.7566E-14  7.3838E-15 -7.6215E-15  5.7601E-14  1.5731E-13
 -6.5248E-15  7.3838E-15  4.4696E-13 -3.6192E-14  6.8498E-15  2.1497E-14
  6.7381E-15 -7.6215E-15 -3.6192E-14  4.0216E-15 -7.0296E-15 -2.2199E-14
 -4.3644E-14  5.7601E-14  6.8498E-15 -7.0296E-15  1.4526E-13  1.4511E-13
 -1.3908E-13  1.5731E-13  2.1497E-14 -2.2199E-14  1.4511E-13  4.5819E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.775030  112.751683    0.401923    0.043091   -0.890825  2452263.759168
# Heliocentric elements and errors
Epoch:              2452260.5000  =  2001/12/17
Mean Anomaly:          323.32431 +/-     0.010
Argument of Peri:      208.84042 +/-     0.013
Long of Asc Node:      310.98769 +/-     0.000
Inclination:             8.38549 +/-     0.000
Eccentricity:         0.14087510 +/-    0.0000
Semi-Major Axis:     47.82977342 +/-    0.0030
Time of Perihelion: 2464569.4699 +/-       3.1
Perihelion:          41.09174931 +/-    0.0033
Aphelion:            54.56779754 +/-    0.0040
Period (y)              330.7925 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -16.17056807 +/-    0.0003
Ecliptic Y           39.60628263 +/-    0.0006
Ecliptic Z            2.03000170 +/-    0.0000
Ecliptic XDOT        -0.00242947 +/-    0.0000
Ecliptic YDOT        -0.00125539 +/-    0.0000
Ecliptic ZDOT        -0.00039171 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.82832944 +/-    0.0006
Geocenter to KBO     41.93105339 +/-    0.0007
# Hcoef:  5.82

The following table shows the complete astrometric record for 13EC138. 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 (13EC138) followed by the observatory code and reference code for the source of the astrometry.

2001 12  20.258425 07 40 16.24   +24 15 21.8   22.0V 13EC138   645  C~2aHn      
2001 12  20.259254 07 40 16.24   +24 15 21.9   21.9V 13EC138   645  C~2aHn      
2001 12  20.261742 07 40 16.24   +24 15 22.1   22.8V 13EC138   645  C~2aHn      
2012 02  13.30661  08 32 25.597  +19 36 37.69  22.1w 13EC138   F51  C~1vWw      
2012 02  13.32114  08 32 25.524  +19 36 37.94  22.0w 13EC138   F51  C~1vWw      
2012 02  13.33571  08 32 25.449  +19 36 38.14  22.0w 13EC138   F51  C~1vWw      
2012 02  13.35030  08 32 25.386  +19 36 38.28  22.0w 13EC138   F51  C~1vWw      
2013 03  13.12101  08 36 02.39   +19 09 24.9   21.3R 13EC138   695  C~0uez      
2013 03  13.19879  08 36 02.13   +19 09 25.7         13EC138   695  C~0uez      
2013 03  14.12911  08 35 59.14   +19 09 34.1         13EC138   695  C~0uez      
2014 01  01.41240  08 47 03.282  +18 17 20.99  22.2w 13EC138   F51  C~1vWw      
2014 01  01.42624  08 47 03.215  +18 17 20.58  22.6w 13EC138   F51  C~1vWw      
2014 01  01.44009  08 47 03.163  +18 17 21.18  22.1w 13EC138   F51  C~1vWw      
2014 01  01.45407  08 47 03.105  +18 17 21.10  22.2w 13EC138   F51  C~1vWw      
2014 03  06.41167  08 42 00.987  +18 34 27.66  22.2w 13EC138   F51  C~1vWw      
2014 03  06.42474  08 42 00.930  +18 34 27.35  22.1w 13EC138   F51  C~1vWw      
2014 03  06.43781  08 42 00.870  +18 34 27.62  22.0w 13EC138   F51  C~1vWw      
2014 03  06.45091  08 42 00.813  +18 34 27.86  22.6w 13EC138   F51  C~1vWw      
2014 12  21.59787  08 53 19.050  +17 39 40.02  22.0w 13EC138   F51  C~1vWw      
2014 12  21.61155  08 53 19.001  +17 39 40.12  22.0w 13EC138   F51  C~1vWw      
2014 12  21.62525  08 53 18.962  +17 39 40.55  22.1w 13EC138   F51  C~1vWw      
2014 12  21.64616  08 53 18.888  +17 39 40.72  22.1w 13EC138   F51  C~1vWw      
2015 01  14.37908  08 51 38.143  +17 45 39.03  22.1w 13EC138   F51  C~1vWw      
2015 01  14.39137  08 51 38.078  +17 45 39.27  22.0w 13EC138   F51  C~1vWw      
2015 01  14.40360  08 51 38.024  +17 45 39.43  22.2w 13EC138   F51  C~1vWw      
2015 01  14.41587  08 51 37.961  +17 45 39.63  22.0w 13EC138   F51  C~1vWw      
2015 02  16.29072  08 48 54.914  +17 55 19.15  22.0w 13EC138   F51  C~1vWw      
2015 02  16.30305  08 48 54.870  +17 55 19.42  22.0w 13EC138   F51  C~1vWw      
2015 02  16.31542  08 48 54.805  +17 55 19.46  22.2w 13EC138   F51  C~1vWw      
2015 02  16.32779  08 48 54.741  +17 55 19.78  21.9w 13EC138   F51  C~1vWw      
2015 02  17.29048  08 48 50.139  +17 55 35.71  21.9w 13EC138   F51  C~1vWw      
2015 02  17.30287  08 48 50.086  +17 55 35.88  21.9w 13EC138   F51  C~1vWw      
2015 02  17.31524  08 48 50.040  +17 55 36.20  21.8w 13EC138   F51  C~1vWw      
2015 02  17.32763  08 48 49.983  +17 55 36.38  21.9w 13EC138   F51  C~1vWw      
2015 03  16.37520  08 46 59.310  +18 01 51.36  22.0w 13EC138   F51  C~1vWw      
2015 03  16.38750  08 46 59.262  +18 01 51.45  22.1w 13EC138   F51  C~1vWw      
2015 03  16.39971  08 46 59.220  +18 01 51.54  22.2w 13EC138   F51  C~1vWw      
2015 03  16.41190  08 46 59.177  +18 01 51.72  21.9w 13EC138   F51  C~1vWw      
2015 03  17.35153  08 46 56.173  +18 02 01.47  22.3w 13EC138   F51  C~1vWw      
2015 03  17.36403  08 46 56.136  +18 02 01.59  22.3w 13EC138   F51  C~1vWw      
2015 03  17.37654  08 46 56.094  +18 02 01.61  22.2w 13EC138   F51  C~1vWw      
2015 03  17.38914  08 46 56.055  +18 02 01.77  22.0w 13EC138   F51  C~1vWw      
2015 04  10.30498  08 46 04.204  +18 04 30.44  22.3w 13EC138   F51  C~1vWw      
2015 04  10.30564  08 46 04.203  +18 04 30.22  22.2w 13EC138   F51  C~1vWx      
2015 04  10.31682  08 46 04.193  +18 04 30.32  22.2w 13EC138   F51  C~1vWx      
2015 04  10.31749  08 46 04.203  +18 04 30.48  22.4w 13EC138   F51  C~1vWx      
2015 04  10.32861  08 46 04.176  +18 04 30.55  22.3w 13EC138   F51  C~1vWx      
2015 04  10.32928  08 46 04.193  +18 04 30.20  22.5w 13EC138   F51  C~1vWx      
2015 04  10.34110  08 46 04.169  +18 04 30.27  22.4w 13EC138   F51  C~1vWx      

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    -0.06       0.00    -0.09
  2   0.0000     -0.02    -0.03       0.10     0.00
  3   0.0000     -0.05     0.10       0.30     0.20
  4  10.1493  46871.85     0.06   -7224.76    -0.07
  5  10.1494  46870.73     0.02   -7224.77    -0.04
  6  10.1494  46869.60    -0.03   -7224.85    -0.08
  7  10.1495  46868.66     0.12   -7224.93    -0.12
  8  11.2275  50448.19    -0.17   -8060.56    -0.05
  9  11.2278  50444.20    -0.18   -8060.72     0.02
 10  11.2303  50398.50     0.06   -8063.37    -0.03
 11  12.0333  61063.33    -0.07   -8660.66     0.37
 12  12.0333  61062.46     0.03   -8661.34    -0.28
 13  12.0334  61061.51     0.04   -8660.94     0.14
 14  12.0334  61060.67     0.19   -8661.25    -0.14
 15  12.2085  56283.33    -0.00   -8808.68     0.22
 16  12.2085  56282.58     0.05   -8809.21    -0.27
 17  12.2086  56281.62    -0.11   -8809.17    -0.19
 18  12.2086  56280.71    -0.22   -8809.15    -0.13
 19  13.0030  67411.88    -0.15   -9424.27    -0.19
 20  13.0030  67411.10    -0.12   -9424.37    -0.25
 21  13.0031  67410.37    -0.04   -9424.09     0.06
 22  13.0031  67409.20     0.02   -9424.22    -0.02
 23  13.0681  65771.30    -0.08   -9474.54     0.05
 24  13.0681  65770.25    -0.17   -9474.56     0.05
 25  13.0682  65769.38    -0.07   -9474.62     0.02
 26  13.0682  65768.37    -0.12   -9474.68    -0.00
 27  13.1582  63134.85     0.01   -9548.15     0.10
 28  13.1582  63134.11     0.23   -9548.06     0.23
 29  13.1583  63133.12     0.21   -9548.28     0.04
 30  13.1583  63132.06     0.12   -9548.21     0.13
 31  13.1609  63058.16    -0.05   -9550.56    -0.03
 32  13.1610  63057.32     0.06   -9550.61    -0.04
 33  13.1610  63056.53     0.23   -9550.47     0.13
 34  13.1610  63055.62     0.28   -9550.51     0.11
 35  13.2351  61285.70     0.09   -9612.87     0.02
 36  13.2351  61284.95    -0.01   -9612.97    -0.04
 37  13.2352  61284.30    -0.02   -9613.04    -0.09
 38  13.2352  61283.60    -0.07   -9613.03    -0.04
 39  13.2378  61235.82     0.02   -9615.09     0.04
 40  13.2378  61235.23     0.08   -9615.11     0.05
 41  13.2378  61234.60     0.09   -9615.26    -0.06
 42  13.2379  61233.97     0.11   -9615.25    -0.02
 43  13.3033  60416.09    -0.19   -9669.96     0.13
 44  13.3033  60416.14    -0.13   -9670.19    -0.09
 45  13.3034  60415.96    -0.10   -9670.13    -0.00
 46  13.3034  60416.06     0.01   -9669.93     0.20
 47  13.3034  60415.64    -0.21   -9669.96     0.20
 48  13.3034  60416.00     0.16   -9670.25    -0.09
 49  13.3034  60415.62    -0.01   -9670.27    -0.08

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.

13EC138    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        47.570    47.579    47.561
ecceobj         0.136     0.136     0.136
incobj          8.409     8.409     8.409
qmin           37.261    36.086    39.201
qmax           59.450    60.521    56.338
amean          47.703    47.669    47.504
amin           47.059    46.993    47.069
amax           48.641    48.741    48.084
emean           0.177     0.179     0.144
emin            0.119     0.119     0.120
emax            0.224     0.247     0.173
imean           9.935     9.886     9.802
imin            9.200     8.856     9.301
imax           10.977    10.753    10.479
excite_mean     0.248     0.249     0.223
fracstop        1.000     1.000     1.000
cjmean          3.070     3.068     3.083

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       175.0     184.7     179.6
kozaiamp        179.9     179.9     179.9