Orbit Fit and Astrometric record for 13GE138

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: 13GE138   
# Created Thu Oct 19 01:38:14 2017
# Orbit generated from Bernstein formalism
# Fitting   26 observations of   26
# Arc:   1.22y
# First observation: 2013/03/07
#  Last observation: 2014/05/25
Preliminary a, adot, b, bdot, g, gdot:
  -0.000072   0.020339  -0.000002  -0.001081   0.022189   0.000000
# Chi-squared of fit:    21.96 DOF:   46 RMS:  0.16
# Min/Max residuals:    -0.52    0.31
# Exact a, adot, b, bdot, g, gdot:
  1.660168E-05  2.028559E-02 -2.266228E-06 -1.078359E-03  2.222460E-02  1.188268E-03
# Covariance matrix:
  2.8492E-13  2.0137E-13  4.1800E-15 -3.3757E-14  4.2765E-13  2.5599E-11
  2.0137E-13  1.3312E-12  1.2770E-14 -1.0798E-13  9.7071E-13  8.2011E-11
  4.1800E-15  1.2770E-14  1.0665E-13 -1.2122E-13  1.2268E-14  1.0023E-12
 -3.3757E-14 -1.0798E-13 -1.2122E-13  2.9613E-13 -1.0116E-13 -8.4677E-12
  4.2765E-13  9.7071E-13  1.2268E-14 -1.0116E-13  1.1111E-12  7.6767E-11
  2.5599E-11  8.2011E-11  1.0023E-12 -8.4677E-12  7.6767E-11  6.4309E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.374511 -140.549580    0.786021   -0.003927   -0.606506  2456359.058558
# Heliocentric elements and errors
Epoch:              2456350.5000  =  2013/02/27
Mean Anomaly:          126.46088 +/-     2.712
Argument of Peri:       55.53778 +/-     2.687
Long of Asc Node:       31.55579 +/-     0.004
Inclination:             3.07086 +/-     0.001
Eccentricity:         0.05531557 +/-    0.0028
Semi-Major Axis:     44.07346450 +/-    0.0170
Time of Perihelion: 2418808.4556 +/-     804.9
Perihelion:          41.63551585 +/-    0.1238
Aphelion:            46.51141315 +/-    0.1241
Period (y)              292.5998 +/-      0.17
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -35.70983973 +/-    0.0017
Ecliptic Y          -28.36629593 +/-    0.0013
Ecliptic Z           -0.29419543 +/-    0.0000
Ecliptic XDOT         0.00146927 +/-    0.0000
Ecliptic YDOT        -0.00202143 +/-    0.0000
Ecliptic ZDOT        -0.00013366 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.60620516 +/-    0.0015
Geocenter to KBO     44.99519420 +/-    0.0021
# Hcoef:  7.72

The following table shows the complete astrometric record for 13GE138. 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 (13GE138) followed by the observatory code and reference code for the source of the astrometry.

2013 03  07.55778  14 27 42.970  -14 59 43.83        13GE138   568  C~1XRa      
2013 03  07.61473  14 27 42.854  -14 59 43.71  24.4r 13GE138   568  C~1XRa      
2013 04  04.55875  14 26 11.998  -14 52 48.71  23.9r 13GE138   568  C~1XRa      
2013 04  07.41899  14 26 00.550  -14 51 55.01  23.4r 13GE138   568  C~1XRa      
2013 04  07.46275  14 26 00.373  -14 51 54.04        13GE138   568  C~1XRa      
2013 04  07.46759  14 26 00.343  -14 51 53.88        13GE138   568  C~1XRa      
2013 04  07.47260  14 26 00.317  -14 51 54.01        13GE138   568  C~1XRa      
2013 04  08.45133  14 25 56.352  -14 51 35.26  23.9r 13GE138   568  C~1XRa      
2013 04  08.49654  14 25 56.157  -14 51 34.38  24.0r 13GE138   568  C~1XRa      
2013 04  09.39790  14 25 52.445  -14 51 17.28  23.6r 13GE138   568  C~1XRa      
2013 04  09.44107  14 25 52.256  -14 51 16.46        13GE138   568  C~1XRa      
2013 04  09.48468  14 25 52.075  -14 51 15.46  24.0r 13GE138   568  C~1XRa      
2013 05  11.48618  14 23 33.175  -14 40 14.53  24.4r 13GE138   568  C~1XRa      
2013 05  12.48847  14 23 28.874  -14 39 53.80  24.0r 13GE138   568  C~1XRa      
2013 06  12.38358  14 21 34.077  -14 30 36.53  24.3r 13GE138   568  C~1XRa      
2013 06  12.42921  14 21 33.930  -14 30 35.82  24.2r 13GE138   568  C~1XRa      
2013 07  06.26578  14 20 42.833  -14 26 25.42  24.3r 13GE138   568  C~1XRa      
2013 07  07.29286  14 20 41.568  -14 26 19.27  24.7r 13GE138   568  C~1XRa      
2014 02  24.61287  14 32 32.726  -15 26 38.49  24.1r 13GE138   568  C~1XRa      
2014 02  25.59592  14 32 31.321  -15 26 32.86  24.5r 13GE138   568  C~1XRa      
2014 02  28.54389  14 32 26.545  -15 26 13.81  24.5r 13GE138   568  C~1XRa      
2014 04  04.45477  14 30 43.887  -15 18 40.35  23.9r 13GE138   568  C~1XRa      
2014 04  04.49467  14 30 43.715  -15 18 39.71  24.1r 13GE138   568  C~1XRa      
2014 04  05.58481  14 30 39.401  -15 18 20.76  24.6r 13GE138   568  C~1XRa      
2014 05  22.43036  14 27 18.874  -15 02 42.27  24.2r 13GE138   568  C~1XRa      
2014 05  25.36167  14 27 07.181  -15 01 46.81  24.5r 13GE138   568  C~1XRa      

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    -0.45       0.00     0.31
  2   0.0002     -1.63     0.03      -0.42    -0.03
  3   0.0767  -1382.03     0.03     -26.85    -0.12
  4   0.0845  -1556.46     0.10     -29.03     0.04
  5   0.0846  -1559.21     0.11     -28.93     0.19
  6   0.0846  -1559.67    -0.04     -28.92     0.21
  7   0.0846  -1559.99    -0.04     -29.17    -0.03
  8   0.0873  -1620.45     0.27     -29.79     0.14
  9   0.0874  -1623.41     0.18     -29.86     0.13
 10   0.0899  -1679.88     0.05     -30.87    -0.20
 11   0.0900  -1682.74    -0.05     -30.97    -0.25
 12   0.0901  -1685.54    -0.07     -30.86    -0.09
 13   0.1778  -3806.19     0.19     -52.03    -0.03
 14   0.1805  -3871.98     0.02     -52.53    -0.02
 15   0.2651  -5630.04    -0.08     -64.25    -0.11
 16   0.2652  -5632.29    -0.22     -64.27    -0.11
 17   0.3305  -6416.17     0.02     -68.57    -0.04
 18   0.3333  -6435.57    -0.06     -68.74    -0.06
 19   0.9694   4489.79    -0.20    -209.66    -0.02
 20   0.9720   4468.72     0.15    -210.67     0.10
 21   0.9801   4397.14     0.08    -214.17    -0.07
 22   1.0757   2844.59     0.09    -249.50     0.28
 23   1.0758   2842.02    -0.06    -249.68     0.15
 24   1.0788   2776.81    -0.15    -251.33    -0.52
 25   1.2070   -274.17    -0.04    -280.25     0.22
 26   1.2151   -452.40     0.13    -281.63    -0.06

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.

13GE138    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.914    43.971    43.865
ecceobj         0.056     0.063     0.050
incobj          3.078     3.078     3.078
qmin           40.739    40.488    41.023
qmax           47.911    48.298    47.550
amean          44.222    44.278    44.173
amin           43.877    43.931    43.821
amax           44.594    44.647    44.542
emean           0.059     0.067     0.053
emin            0.045     0.052     0.037
emax            0.075     0.082     0.068
imean           2.640     2.651     2.629
imin            1.926     1.928     1.922
imax            3.182     3.211     3.157
excite_mean     0.076     0.082     0.070
fracstop        1.000     1.000     1.000
cjmean          3.097     3.097     3.098

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       173.1     172.7     173.0
kozaiamp        180.0     180.0     180.0