Orbit Fit and Astrometric record for 13GG137

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: 13GG137   
# Created Mon Dec 11 02:37:56 2017
# Orbit generated from Bernstein formalism
# Fitting   25 observations of   25
# Arc:   1.38y
# First observation: 2013/02/08
#  Last observation: 2014/06/26
Preliminary a, adot, b, bdot, g, gdot:
  -0.000203   0.032231   0.000010  -0.000651   0.028846   0.000000
# Chi-squared of fit:    20.82 DOF:   44 RMS:  0.16
# Min/Max residuals:    -0.64    0.40
# Exact a, adot, b, bdot, g, gdot:
  1.834371E-05  3.178214E-02  2.764584E-06 -6.420798E-04  2.867238E-02  3.555791E-03
# Covariance matrix:
  6.5078E-13  3.9527E-13 -1.0484E-14 -9.3248E-15  7.7598E-13  3.0875E-11
  3.9527E-13  1.3555E-12 -1.3793E-14 -1.7081E-14  1.1494E-12  5.9073E-11
 -1.0484E-14 -1.3793E-14  1.8414E-13 -1.7555E-13 -1.7896E-14 -7.4336E-13
 -9.3248E-15 -1.7081E-14 -1.7555E-13  2.4413E-13 -1.8250E-14 -9.0940E-13
  7.7598E-13  1.1494E-12 -1.7896E-14 -1.8250E-14  1.3868E-12  6.1646E-11
  3.0875E-11  5.9073E-11 -7.4336E-13 -9.0940E-13  6.1646E-11  3.1409E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.142433 -145.113617    0.951972    0.009624   -0.255865  2456332.080458
# Heliocentric elements and errors
Epoch:              2456330.5000  =  2013/02/07
Mean Anomaly:           34.15994 +/-     0.385
Argument of Peri:       73.04057 +/-     0.571
Long of Asc Node:       96.03113 +/-     0.019
Inclination:             2.39257 +/-     0.000
Eccentricity:         0.13545613 +/-    0.0014
Semi-Major Axis:     39.27435515 +/-    0.0156
Time of Perihelion: 2447799.9576 +/-      96.0
Perihelion:          33.95440304 +/-    0.0559
Aphelion:            44.59430726 +/-    0.0571
Period (y)              246.1341 +/-      0.15
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -29.34209206 +/-    0.0012
Ecliptic Y          -19.29743792 +/-    0.0008
Ecliptic Z            1.30391827 +/-    0.0001
Ecliptic XDOT         0.00144934 +/-    0.0000
Ecliptic YDOT        -0.00268382 +/-    0.0000
Ecliptic ZDOT        -0.00004844 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.14327360 +/-    0.0011
Geocenter to KBO     34.87677311 +/-    0.0014
# Hcoef:  8.86

The following table shows the complete astrometric record for 13GG137. 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 (13GG137) followed by the observatory code and reference code for the source of the astrometry.

2013 02  08.57968  14 13 21.448  -11 07 51.21  23.6r 13GG137   568  C~1XRX      
2013 04  04.43770  14 10 34.382  -10 50 57.71  24.3r 13GG137   568  C~1XRX      
2013 04  04.47824  14 10 34.157  -10 50 56.71  24.0r 13GG137   568  C~1XRX      
2013 04  04.51865  14 10 33.945  -10 50 55.49  23.9r 13GG137   568  C~1XRX      
2013 04  06.61093  14 10 23.332  -10 49 57.76  23.8r 13GG137   568  C~1XRX      
2013 04  08.41181  14 10 14.107  -10 49 07.54  23.5r 13GG137   568  C~1XRX      
2013 05  11.44582  14 07 17.682  -10 33 50.43  24.2r 13GG137   568  C~1XRX      
2013 05  12.44355  14 07 12.568  -10 33 24.77  24.8r 13GG137   568  C~1XRX      
2013 06  13.28196  14 04 57.272  -10 22 47.64  24.3r 13GG137   568  C~1XRX      
2013 06  13.32253  14 04 57.149  -10 22 46.69  24.0r 13GG137   568  C~1XRX      
2013 07  04.30285  14 04 11.686  -10 20 03.71  24.2r 13GG137   568  C~1XRX      
2013 07  06.31139  14 04 09.577  -10 20 00.61  24.3r 13GG137   568  C~1XRX      
2014 02  24.58563  14 20 00.672  -11 43 29.08  24.5r 13GG137   568  C~1XRX      
2014 02  25.55523  14 19 58.763  -11 43 16.27  24.4r 13GG137   568  C~1XRX      
2014 02  28.51669  14 19 52.319  -11 42 34.64  24.7r 13GG137   568  C~1XRX      
2014 04  04.41916  14 17 40.007  -11 30 05.51  23.9r 13GG137   568  C~1XRX      
2014 04  04.45865  14 17 39.815  -11 30 04.35  24.2r 13GG137   568  C~1XRX      
2014 04  05.47600  14 17 34.736  -11 29 36.94        13GG137   568  C~1XRX      
2014 04  05.53127  14 17 34.473  -11 29 35.86  24.1r 13GG137   568  C~1XRX      
2014 04  29.34030  14 15 28.151  -11 18 41.21  23.8r 13GG137   568  C~1XRX      
2014 04  29.34534  14 15 28.123  -11 18 41.15  24.1r 13GG137   568  C~1XRX      
2014 04  29.42745  14 15 27.667  -11 18 38.76  24.3r 13GG137   568  C~1XRX      
2014 04  29.43257  14 15 27.634  -11 18 38.63  24.4r 13GG137   568  C~1XRX      
2014 05  25.45015  14 13 14.060  -11 07 46.40  24.1r 13GG137   568  C~1XRX      
2014 06  26.30928  14 11 22.814  -10 59 46.25  24.8r 13GG137   568  C~1XRX      

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    -0.64
  2   0.1502  -2657.36     0.34     134.66     0.15
  3   0.1503  -2660.82     0.14     134.49    -0.04
  4   0.1504  -2664.17     0.03     134.60     0.04
  5   0.1561  -2830.86    -0.13     136.65     0.06
  6   0.1611  -2975.77    -0.08     138.45     0.24
  7   0.2515  -5734.44    -0.10     128.16    -0.10
  8   0.2542  -5814.15    -0.11     126.88     0.04
  9   0.3414  -7910.03     0.08      51.62    -0.02
 10   0.3415  -7912.06     0.06      51.89     0.40
 11   0.3990  -8599.50     0.04     -22.45    -0.04
 12   0.4045  -8629.88    -0.10     -30.11     0.01
 13   1.0431   6248.19     0.03     -82.10    -0.03
 14   1.0458   6217.48     0.06     -79.17     0.05
 15   1.0539   6114.33     0.07     -70.79    -0.05
 16   1.1495   4030.77     0.07      -1.08    -0.16
 17   1.1496   4027.72     0.12      -0.92    -0.01
 18   1.1524   3948.18    -0.40       0.40     0.29
 19   1.1525   3944.17    -0.02       0.14     0.01
 20   1.2177   1974.33     0.04       5.17     0.03
 21   1.2177   1973.93     0.06       5.09    -0.05
 22   1.2179   1966.81    -0.01       5.12     0.08
 23   1.2179   1966.30    -0.07       5.09     0.05
 24   1.2892   -104.14    -0.02     -31.63    -0.20
 25   1.3764  -1808.26     0.06    -124.92    -0.13

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.

13GG137    quality flag:3

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

axisobj        39.127    39.183    39.073
ecceobj         0.132     0.136     0.128
incobj          2.392     2.392     2.392
qmin           33.185    33.148    33.264
qmax           46.134    46.182    46.169
amean          39.458    39.458    39.458
amin           39.048    39.076    39.022
amax           39.903    39.882    39.940
emean           0.140     0.142     0.138
emin            0.124     0.124     0.120
emax            0.157     0.159     0.157
imean           0.849     0.869     0.846
imin            0.143     0.203     0.000
imax            1.386     1.438     1.438
excite_mean     0.141     0.143     0.139
fracstop        1.000     1.000     1.000
cjmean          3.029     3.029     3.030

libcent 0       180.2     180.5     179.5
libamp  0        66.3      55.5      86.4
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       178.9     178.8     179.9
kozaiamp        180.0     180.0     180.0