Orbit Fit and Astrometric record for 13GU137

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: 13GU137   
# Created Thu Oct 19 01:38:14 2017
# Orbit generated from Bernstein formalism
# Fitting   38 observations of   38
# Arc:   4.22y
# First observation: 2013/03/07
#  Last observation: 2017/05/27
Preliminary a, adot, b, bdot, g, gdot:
  -0.000179   0.024192   0.000001  -0.002105   0.023978   0.000000
# Chi-squared of fit:    21.07 DOF:   70 RMS:  0.13
# Min/Max residuals:    -0.49    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.495718E-05  2.417564E-02 -1.392424E-06 -2.101356E-03  2.422066E-02 -4.524155E-04
# Covariance matrix:
  1.1362E-13 -6.0640E-14 -1.3293E-15  3.3089E-15  4.4220E-14 -4.1019E-13
 -6.0640E-14  1.8383E-13  6.4604E-15 -1.5990E-14  6.9996E-14  1.9714E-12
 -1.3293E-15  6.4604E-15  6.8767E-14 -3.0187E-14  2.8762E-15  8.2298E-14
  3.3089E-15 -1.5990E-14 -3.0187E-14  3.0709E-14 -7.0909E-15 -2.0371E-13
  4.4220E-14  6.9996E-14  2.8762E-15 -7.0909E-15  1.1908E-13  8.7085E-13
 -4.1019E-13  1.9714E-12  8.2298E-14 -2.0371E-13  8.7085E-13  2.5115E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.071876 -142.403125    0.766257   -0.000752   -0.631297  2456359.034468
# Heliocentric elements and errors
Epoch:              2456350.5000  =  2013/02/27
Mean Anomaly:          332.79221 +/-     0.134
Argument of Peri:      212.09452 +/-     0.158
Long of Asc Node:       35.73479 +/-     0.000
Inclination:             4.97676 +/-     0.000
Eccentricity:         0.07210033 +/-    0.0001
Semi-Major Axis:     44.73907957 +/-    0.0025
Time of Perihelion: 2464611.2560 +/-      40.6
Perihelion:          41.51337698 +/-    0.0052
Aphelion:            47.96478216 +/-    0.0053
Period (y)              299.2532 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -33.67909424 +/-    0.0005
Ecliptic Y          -24.96530044 +/-    0.0004
Ecliptic Z           -0.05184034 +/-    0.0000
Ecliptic XDOT         0.00170176 +/-    0.0000
Ecliptic YDOT        -0.00213316 +/-    0.0000
Ecliptic ZDOT        -0.00023733 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.92314757 +/-    0.0004
Geocenter to KBO     41.28706608 +/-    0.0006
# Hcoef:  7.66

The following table shows the complete astrometric record for 13GU137. 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 (13GU137) followed by the observatory code and reference code for the source of the astrometry.

2013 03  07.53369  14 20 51.896  -14 06 46.87  23.9r 13GU137   568  C~1XRZ      
2013 03  07.59012  14 20 51.741  -14 06 46.20  23.5r 13GU137   568  C~1XRZ      
2013 03  07.64267  14 20 51.594  -14 06 45.59  23.3r 13GU137   568  C~1XRZ      
2013 04  07.39521  14 18 59.757  -13 58 05.48  23.9r 13GU137   568  C~1XRZ      
2013 04  07.43903  14 18 59.570  -13 58 04.61  24.3r 13GU137   568  C~1XRZ      
2013 04  08.42769  14 18 55.190  -13 57 43.78  23.0r 13GU137   568  C~1XRZ      
2013 04  08.47292  14 18 54.983  -13 57 42.60  23.6r 13GU137   568  C~1XRZ      
2013 04  09.37434  14 18 51.000  -13 57 23.96  23.5r 13GU137   568  C~1XRZ      
2013 04  09.41746  14 18 50.801  -13 57 22.94  23.6r 13GU137   568  C~1XRZ      
2013 04  09.46062  14 18 50.607  -13 57 22.17  23.6r 13GU137   568  C~1XRZ      
2013 05  11.46227  14 16 21.850  -13 45 30.32  23.9r 13GU137   568  C~1XRZ      
2013 05  12.46349  14 16 17.311  -13 45 08.54  24.2r 13GU137   568  C~1XRZ      
2013 06  12.35950  14 14 17.593  -13 35 34.17  24.1r 13GU137   568  C~1XRZ      
2013 06  12.40439  14 14 17.439  -13 35 33.45  24.0r 13GU137   568  C~1XRZ      
2013 07  04.31926  14 13 29.422  -13 31 51.54  24.3r 13GU137   568  C~1XRZ      
2013 07  06.32704  14 13 26.952  -13 31 41.16  23.7r 13GU137   568  C~1XRZ      
2013 08  02.25463  14 13 28.708  -13 32 18.98  23.9r 13GU137   568  C~1XRZ      
2014 02  01.64786  14 26 42.751  -14 42 26.06  23.1r 13GU137   568  C~1XRZ      
2014 02  02.64572  14 26 43.274  -14 42 30.27  23.5r 13GU137   568  C~1XRZ      
2014 02  03.59026  14 26 43.669  -14 42 33.80  24.1r 13GU137   568  C~1XRZ      
2014 02  24.58951  14 26 30.413  -14 42 00.88  23.7r 13GU137   568  C~1XRZ      
2014 02  25.57248  14 26 28.803  -14 41 54.65  24.1r 13GU137   568  C~1XRZ      
2014 04  04.43905  14 24 30.635  -14 33 10.62  23.1r 13GU137   568  C~1XRZ      
2014 04  04.44293  14 24 30.630  -14 33 10.60  23.2r 13GU137   568  C~1XRZ      
2014 04  04.47867  14 24 30.468  -14 33 09.94  24.2r 13GU137   568  C~1XRZ      
2014 04  04.48274  14 24 30.468  -14 33 09.74  24.6r 13GU137   568  C~1XRZ      
2014 04  05.56427  14 24 25.841  -14 32 48.65  23.7r 13GU137   568  C~1XRZ      
2014 04  05.56944  14 24 25.819  -14 32 48.50  23.7r 13GU137   568  C~1XRZ      
2014 05  22.44598  14 20 50.855  -14 16 01.81  23.5r 13GU137   568  C~1XRZ      
2014 05  25.43819  14 20 38.289  -14 15 02.01  24.1r 13GU137   568  C~1XRZ      
2014 06  26.33430  14 18 55.567  -14 06 59.47  23.8r 13GU137   568  C~1XRZ      
2014 07  18.29682  14 18 29.566  -14 05 08.56  24.2r 13GU137   568  C~1XRZ      
2014 07  18.30122  14 18 29.569  -14 05 08.55  23.7r 13GU137   568  C~1XRZ      
2016 05  29.19813  14 30 59.820  -15 21 12.55  23.4R 13GU137   G37              
2016 05  29.26987  14 30 59.528  -15 21 11.33        13GU137   G37              
2017 01  31.64975  14 42 29.147  -16 19 22.05  23.6w 13GU137   568  C~2KOG      
2017 02  03.64617  14 42 31.843  -16 19 40.71        13GU137   568  C~2KOG      
2017 05  27.33451  14 36 32.025  -15 55 04.40  23.6r 13GU137   568  C~2KOG      

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     0.00
  2   0.0002     -2.35     0.16      -0.10     0.00
  3   0.0003     -4.57     0.12      -0.22    -0.03
  4   0.0845  -1712.70    -0.05     -38.92    -0.01
  5   0.0846  -1715.56     0.09     -38.98    -0.00
  6   0.0873  -1782.63    -0.18     -40.14     0.07
  7   0.0874  -1785.86    -0.30     -40.01     0.28
  8   0.0899  -1846.75     0.06     -41.35     0.01
  9   0.0900  -1849.82    -0.02     -41.33     0.10
 10   0.0901  -1852.74     0.06     -41.53    -0.02
 11   0.1778  -4133.29    -0.01     -80.20    -0.06
 12   0.1805  -4202.93    -0.02     -81.42    -0.12
 13   0.2651  -6040.73     0.10    -116.02     0.02
 14   0.2652  -6043.09    -0.14    -116.09     0.01
 15   0.3252  -6777.94     0.07    -139.13     0.13
 16   0.3307  -6815.40    -0.08    -141.31     0.03
 17   0.4044  -6778.64     0.02    -168.48     0.01
 18   0.9065   5515.87    -0.19    -384.07     0.25
 19   0.9093   5524.42     0.01    -385.65     0.12
 20   0.9119   5530.98    -0.00    -387.16    -0.05
 21   0.9694   5338.07    -0.02    -417.33     0.11
 22   0.9720   5313.92     0.19    -418.89    -0.03
 23   1.0757   3520.51    -0.26    -471.64    -0.14
 24   1.0757   3520.44    -0.08    -471.65    -0.14
 25   1.0758   3518.00    -0.17    -471.78    -0.20
 26   1.0758   3517.93     0.04    -471.59    -0.01
 27   1.0788   3447.52     0.05    -473.20    -0.16
 28   1.0788   3447.17     0.05    -473.16    -0.11
 29   1.2072    166.03     0.24    -529.74    -0.49
 30   1.2153    -26.17     0.27    -532.58    -0.14
 31   1.3027  -1595.76    -0.03    -563.52     0.03
 32   1.3628  -1989.53    -0.11    -582.46     0.17
 33   1.3628  -1989.49    -0.05    -582.44     0.19
 34   3.2270   9791.19    -0.09   -1412.67     0.16
 35   3.2272   9786.78     0.06   -1412.84     0.08
 36   3.9045  20388.55     0.04   -1672.90     0.01
 37   3.9127  20431.60    -0.05   -1679.04    -0.14
 38   4.2212  15003.19     0.06   -1852.01     0.07

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.

13GU137    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.570    44.577    44.562
ecceobj         0.070     0.070     0.070
incobj          4.986     4.986     4.986
qmin           41.021    41.028    41.019
qmax           49.054    49.059    49.057
amean          44.909    44.910    44.898
amin           44.547    44.547    44.540
amax           45.289    45.291    45.276
emean           0.070     0.070     0.070
emin            0.056     0.056     0.056
emax            0.083     0.083     0.084
imean           4.272     4.268     4.271
imin            3.754     3.752     3.753
imax            4.763     4.757     4.765
excite_mean     0.102     0.102     0.102
fracstop        1.000     1.000     1.000
cjmean          3.100     3.100     3.100

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       183.7     184.2     183.7
kozaiamp        179.9     180.0     180.0