Orbit Fit and Astrometric record for 13GF138

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: 13GF138   
# Created Tue Oct 24 01:38:14 2017
# Orbit generated from Bernstein formalism
# Fitting   37 observations of   37
# Arc:  12.07y
# First observation: 2005/05/04
#  Last observation: 2017/05/28
Preliminary a, adot, b, bdot, g, gdot:
  -0.000919   0.022260  -0.000007   0.000181   0.024413   0.000000
# Chi-squared of fit:    14.98 DOF:   68 RMS:  0.11
# Min/Max residuals:    -0.19    0.36
# Exact a, adot, b, bdot, g, gdot:
  1.527964E-05  2.204545E-02 -2.132463E-07  1.788117E-04  2.324380E-02  2.735763E-04
# Covariance matrix:
  3.6641E-13 -7.5988E-14  3.8808E-16 -3.2639E-16 -3.5822E-14 -1.7227E-13
 -7.5988E-14  4.1408E-14 -3.6423E-16  2.9984E-16  1.2516E-14  1.5989E-13
  3.8808E-16 -3.6423E-16  3.1887E-13 -3.5975E-14 -7.8845E-17 -1.5865E-15
 -3.2639E-16  2.9984E-16 -3.5975E-14  4.6251E-15  1.0322E-16  1.3032E-15
 -3.5822E-14  1.2516E-14 -7.8845E-17  1.0322E-16  1.2713E-13  4.5198E-14
 -1.7227E-13  1.5989E-13 -1.5865E-15  1.3032E-15  4.5198E-14  6.9568E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.305985 -151.700123   -0.272802    0.005249   -0.967209  2453494.853023
# Heliocentric elements and errors
Epoch:              2453490.5000  =  2005/04/30
Mean Anomaly:           67.27981 +/-     0.109
Argument of Peri:      323.34325 +/-     0.116
Long of Asc Node:      175.76262 +/-     0.013
Inclination:             0.55104 +/-     0.000
Eccentricity:         0.02112033 +/-    0.0000
Semi-Major Axis:     44.33876684 +/-    0.0027
Time of Perihelion: 2433336.7382 +/-      32.5
Perihelion:          43.40231726 +/-    0.0033
Aphelion:            45.27521641 +/-    0.0033
Period (y)              295.2457 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -38.60587049 +/-    0.0006
Ecliptic Y          -21.09586408 +/-    0.0003
Ecliptic Z            0.22977457 +/-    0.0000
Ecliptic XDOT         0.00120339 +/-    0.0000
Ecliptic YDOT        -0.00230863 +/-    0.0000
Ecliptic ZDOT         0.00002129 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.99433502 +/-    0.0005
Geocenter to KBO     43.02222607 +/-    0.0007
# Hcoef:  7.33

The following table shows the complete astrometric record for 13GF138. 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 (13GF138) followed by the observatory code and reference code for the source of the astrometry.

2005 05  04.35228  13 45 36.21   -10 35 02.7   23.6r 13GF138   568  C~1XRa      
2005 05  04.38654  13 45 36.07   -10 35 01.9   24.3r 13GF138   568  C~1XRa      
2005 05  04.43052  13 45 35.88   -10 35 00.8   23.6r 13GF138   568  C~1XRa      
2005 05  05.39728  13 45 31.81   -10 34 38.0   23.8r 13GF138   568  C~1XRa      
2013 03  07.55778  14 28 13.972  -14 14 38.23  23.9r 13GF138   568  C~1XRa      
2013 03  07.56275  14 28 13.941  -14 14 37.89  23.1r 13GF138   568  C~1XRa      
2013 03  07.61473  14 28 13.808  -14 14 37.44  23.6r 13GF138   568  C~1XRa      
2013 04  04.55875  14 26 41.575  -14 06 54.50  23.3r 13GF138   568  C~1XRa      
2013 04  07.46275  14 26 29.714  -14 05 55.43  23.6r 13GF138   568  C~1XRa      
2013 04  07.46759  14 26 29.685  -14 05 55.43  23.6r 13GF138   568  C~1XRa      
2013 04  07.47260  14 26 29.670  -14 05 55.30  23.0r 13GF138   568  C~1XRa      
2013 04  07.47750  14 26 29.639  -14 05 55.00  22.8r 13GF138   568  C~1XRa      
2013 04  08.45133  14 26 25.600  -14 05 34.97  23.6r 13GF138   568  C~1XRa      
2013 04  08.49654  14 26 25.398  -14 05 34.01  23.5r 13GF138   568  C~1XRa      
2013 04  09.39790  14 26 21.640  -14 05 15.27  23.4r 13GF138   568  C~1XRa      
2013 04  09.44107  14 26 21.460  -14 05 14.33  23.5r 13GF138   568  C~1XRa      
2013 04  09.48468  14 26 21.265  -14 05 13.51  23.8r 13GF138   568  C~1XRa      
2013 05  11.48618  14 23 59.461  -13 53 30.72  23.8r 13GF138   568  C~1XRa      
2013 05  12.48847  14 23 55.071  -13 53 08.96  23.5r 13GF138   568  C~1XRa      
2013 06  12.38358  14 21 57.929  -13 43 32.01  23.6r 13GF138   568  C~1XRa      
2013 06  12.42921  14 21 57.809  -13 43 31.31  24.2r 13GF138   568  C~1XRa      
2013 07  07.29286  14 21 04.680  -13 39 15.25  23.8r 13GF138   568  C~1XRa      
2013 08  02.28256  14 21 02.500  -13 39 15.80  24.1r 13GF138   568  C~1XRa      
2013 08  05.28429  14 21 06.002  -13 39 34.85  23.6r 13GF138   568  C~1XRa      
2014 02  25.59592  14 33 26.198  -14 39 14.87  24.0r 13GF138   568  C~1XRa      
2014 02  28.54389  14 33 21.465  -14 38 50.52  23.8r 13GF138   568  C~1XRa      
2014 04  04.43513  14 31 37.722  -14 30 17.28  23.5r 13GF138   568  C~1XRa      
2014 04  04.47439  14 31 37.566  -14 30 16.67  23.7r 13GF138   568  C~1XRa      
2014 05  22.43425  14 28 08.339  -14 13 19.45  23.7r 13GF138   568  C~1XRa      
2014 05  25.36555  14 27 56.368  -14 12 21.70  23.6r 13GF138   568  C~1XRa      
2014 05  25.37028  14 27 56.355  -14 12 21.47  23.6r 13GF138   568  C~1XRa      
2014 06  26.33823  14 26 14.390  -14 04 11.56  23.9r 13GF138   568  C~1XRa      
2014 07  18.31323  14 25 45.879  -14 02 00.95  23.8r 13GF138   568  C~1XRa      
2016 05  10.32654  14 38 51.315  -15 03 16.30  23.3r 13GF138   568  C~2KOG      
2016 05  10.40239  14 38 50.970  -15 03 14.84  23.5r 13GF138   568  C~2KOG      
2017 05  28.35383  14 42 32.385  -15 19 47.70  23.5r 13GF138   568  C~2KOG      
2017 05  28.41896  14 42 32.115  -15 19 46.36  23.5r 13GF138   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    -0.06       0.00     0.07
  2   0.0001     -2.21     0.05       0.01     0.10
  3   0.0002     -5.22     0.02       0.04     0.14
  4   0.0029    -69.42    -0.02      -0.04     0.06
  5   7.8418  40206.10     0.36     284.19    -0.16
  6   7.8418  40205.54    -0.00     284.38     0.02
  7   7.8419  40203.49     0.00     284.18    -0.18
  8   7.9184  38732.59     0.09     294.56    -0.04
  9   7.9264  38543.81     0.05     295.26    -0.04
 10   7.9264  38543.39    -0.04     295.12    -0.18
 11   7.9264  38543.14     0.04     295.17    -0.12
 12   7.9264  38542.59    -0.17     295.32     0.02
 13   7.9291  38478.35    -0.04     295.46    -0.05
 14   7.9292  38475.15    -0.19     295.43    -0.07
 15   7.9317  38415.35    -0.03     295.66    -0.06
 16   7.9318  38412.47     0.03     295.71     0.00
 17   7.9319  38409.42    -0.06     295.58    -0.12
 18   8.0195  36157.82     0.08     296.92    -0.15
 19   8.0223  36088.22    -0.07     296.87    -0.09
 20   8.1069  34234.61    -0.05     289.80     0.03
 21   8.1070  34232.68     0.23     289.89     0.15
 22   8.1751  33395.28    -0.05     279.97    -0.17
 23   8.2462  33364.63    -0.14     268.96    -0.01
 24   8.2544  33420.53     0.09     267.56    -0.16
 25   8.8138  45180.10    -0.09     317.05     0.07
 26   8.8219  45103.76    -0.11     318.69     0.07
 27   8.9174  43439.41     0.05     332.87     0.08
 28   8.9175  43436.96     0.15     332.73    -0.05
 29   9.0488  40099.48     0.01     333.67     0.02
 30   9.0568  39909.18    -0.13     332.88    -0.16
 31   9.0569  39908.92    -0.09     333.04     0.01
 32   9.1444  38290.85     0.12     322.64     0.15
 33   9.2045  37841.20     0.02     313.03     0.12
 34  11.0170  50373.11    -0.12     412.96     0.21
 35  11.0172  50367.59    -0.05     412.81     0.10
 36  12.0657  53937.41     0.08     448.30     0.13
 37  12.0659  53933.00     0.05     448.40     0.27

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.

13GF138    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.791    43.799    43.783
ecceobj         0.019     0.019     0.019
incobj          0.554     0.554     0.554
qmin           42.228    42.226    42.211
qmax           46.150    46.166    46.166
amean          44.105    44.113    44.099
amin           43.758    43.777    43.758
amax           44.448    44.466    44.443
emean           0.024     0.024     0.024
emin            0.007     0.007     0.007
emax            0.039     0.038     0.039
imean           1.828     1.828     1.829
imin            1.166     1.166     1.165
imax            2.391     2.389     2.394
excite_mean     0.040     0.040     0.040
fracstop        1.000     1.000     1.000
cjmean          3.101     3.101     3.101

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       187.5     186.6     187.5
kozaiamp        180.0     180.0     179.9