Orbit Fit and Astrometric record for 13GF137

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: 13GF137   
# Created Tue Dec 12 02:37:57 2017
# Orbit generated from Bernstein formalism
# Fitting   37 observations of   37
# Arc:   1.96y
# First observation: 2013/02/08
#  Last observation: 2015/01/26
Preliminary a, adot, b, bdot, g, gdot:
  -0.000182   0.027483  -0.000024  -0.007190   0.027085   0.000000
# Chi-squared of fit:    23.18 DOF:   68 RMS:  0.14
# Min/Max residuals:    -0.40    0.37
# Exact a, adot, b, bdot, g, gdot:
  1.775987E-05  2.733814E-02 -3.168648E-06 -7.194809E-03  2.705050E-02  4.875583E-03
# Covariance matrix:
  1.6948E-13 -2.5291E-14  4.7455E-15 -2.8169E-14  1.3409E-13  2.6394E-12
 -2.5291E-14  3.3084E-13  1.5507E-14 -8.8003E-14  1.8666E-13  8.1828E-12
  4.7455E-15  1.5507E-14  9.7020E-14 -9.5420E-14  1.4540E-14  6.5641E-13
 -2.8169E-14 -8.8003E-14 -9.5420E-14  1.7753E-13 -8.4218E-14 -3.7244E-12
  1.3409E-13  1.8666E-13  1.4540E-14 -8.4218E-14  2.8106E-13  7.8587E-12
  2.6394E-12  8.1828E-12  6.5641E-13 -3.7244E-12  7.8587E-12  3.4630E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.420798 -144.336141    0.955392    0.001837   -0.242966  2456332.072698
# Heliocentric elements and errors
Epoch:              2456330.5000  =  2013/02/07
Mean Anomaly:           60.09478 +/-     0.024
Argument of Peri:      101.12297 +/-     0.050
Long of Asc Node:       35.78449 +/-     0.000
Inclination:            14.69922 +/-     0.001
Eccentricity:         0.15791732 +/-    0.0007
Semi-Major Axis:     39.50518756 +/-    0.0090
Time of Perihelion: 2441190.9184 +/-       3.2
Perihelion:          33.26663412 +/-    0.0273
Aphelion:            45.74374100 +/-    0.0282
Period (y)              248.3072 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -30.78680855 +/-    0.0006
Ecliptic Y          -20.91625510 +/-    0.0004
Ecliptic Z            0.27137890 +/-    0.0000
Ecliptic XDOT         0.00120176 +/-    0.0000
Ecliptic YDOT        -0.00253789 +/-    0.0000
Ecliptic ZDOT        -0.00072443 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.22084033 +/-    0.0005
Geocenter to KBO     36.96789760 +/-    0.0007
# Hcoef:  8.12

The following table shows the complete astrometric record for 13GF137. 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 (13GF137) followed by the observatory code and reference code for the source of the astrometry.

2013 02  08.57192  14 14 01.060  -13 00 46.58  22.8r 13GF137   568  C~1XRX      
2013 02  08.63142  14 14 01.041  -13 00 46.68  23.1r 13GF137   568  C~1XRX      
2013 02  08.63609  14 14 01.048  -13 00 46.58  23.5r 13GF137   568  C~1XRX      
2013 04  04.42978  14 11 13.109  -12 49 49.48  23.7r 13GF137   568  C~1XRX      
2013 04  04.47031  14 11 12.905  -12 49 48.49  23.9r 13GF137   568  C~1XRX      
2013 04  04.51071  14 11 12.705  -12 49 47.69  24.0r 13GF137   568  C~1XRX      
2013 04  05.56945  14 11 07.429  -12 49 24.76  24.4r 13GF137   568  C~1XRX      
2013 04  05.57336  14 11 07.433  -12 49 24.64  24.1r 13GF137   568  C~1XRX      
2013 04  05.57724  14 11 07.419  -12 49 24.79  22.5r 13GF137   568  C~1XRX      
2013 04  05.58112  14 11 07.400  -12 49 24.26  22.9r 13GF137   568  C~1XRX      
2013 04  05.58503  14 11 07.360  -12 49 24.47  23.5r 13GF137   568  C~1XRX      
2013 04  05.59323  14 11 07.311  -12 49 24.15  22.6r 13GF137   568  C~1XRX      
2013 04  06.60299  14 11 02.244  -12 49 02.41  23.3r 13GF137   568  C~1XRX      
2013 04  08.40393  14 10 53.177  -12 48 22.53  23.6r 13GF137   568  C~1XRX      
2013 05  11.43786  14 07 59.598  -12 35 41.24  23.7r 13GF137   568  C~1XRX      
2013 05  12.43565  14 07 54.548  -12 35 19.29  24.1r 13GF137   568  C~1XRX      
2013 06  13.27356  14 05 39.854  -12 25 58.07  23.9r 13GF137   568  C~1XRX      
2013 06  13.31400  14 05 39.729  -12 25 57.70  23.8r 13GF137   568  C~1XRX      
2013 07  04.29497  14 04 52.370  -12 23 26.47  23.7r 13GF137   568  C~1XRX      
2013 07  06.30260  14 04 49.971  -12 23 23.12  23.8r 13GF137   568  C~1XRX      
2014 02  01.63775  14 19 30.879  -13 54 16.06  23.9r 13GF137   568  C~1XRX      
2014 02  02.63560  14 19 31.173  -13 54 22.17  23.9r 13GF137   568  C~1XRX      
2014 02  03.58019  14 19 31.385  -13 54 27.12  23.9r 13GF137   568  C~1XRX      
2014 02  24.59733  14 19 11.356  -13 54 16.06  24.1r 13GF137   568  C~1XRX      
2014 02  25.58039  14 19 09.319  -13 54 09.75  23.8r 13GF137   568  C~1XRX      
2014 02  28.52833  14 19 02.621  -13 53 49.05  24.0r 13GF137   568  C~1XRX      
2014 03  28.43778  14 17 23.101  -13 47 27.75  23.9r 13GF137   568  C~1XRX      
2014 03  28.47685  14 17 22.919  -13 47 27.05  23.7r 13GF137   568  C~1XRX      
2014 04  04.43113  14 16 50.098  -13 45 11.07  23.8r 13GF137   568  C~1XRX      
2014 04  04.47037  14 16 49.901  -13 45 10.21  24.1r 13GF137   568  C~1XRX      
2014 04  05.54517  14 16 44.609  -13 44 48.48        13GF137   568  C~1XRX      
2014 04  05.55400  14 16 44.574  -13 44 47.62  24.0r 13GF137   568  C~1XRX      
2014 05  22.38550  14 12 42.650  -13 27 33.64  23.6r 13GF137   568  C~1XRX      
2014 05  28.36219  14 12 15.399  -13 25 38.54  23.9r 13GF137   568  C~1XRX      
2014 06  26.32099  14 10 37.456  -13 19 12.39  24.3r 13GF137   568  C~1XRX      
2014 07  18.28768  14 10 12.082  -13 18 28.95        13GF137   568  C~1XRX      
2015 01  26.62254  14 24 53.984  -14 46 12.72  24.1r 13GF137   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    -0.37       0.00    -0.21
  2   0.0002     -0.23    -0.08      -0.19    -0.17
  3   0.0002     -0.17     0.03      -0.06    -0.02
  4   0.1502  -2534.27     0.02    -198.04    -0.05
  5   0.1503  -2537.41    -0.02    -198.10     0.06
  6   0.1504  -2540.44     0.06    -198.33     0.02
  7   0.1533  -2620.84    -0.13    -202.52    -0.01
  8   0.1533  -2620.83     0.19    -202.38     0.14
  9   0.1533  -2620.97     0.34    -202.59    -0.05
 10   0.1533  -2621.41     0.20    -202.19     0.37
 11   0.1534  -2621.89     0.02    -202.58    -0.01
 12   0.1534  -2622.67    -0.13    -202.52     0.09
 13   0.1561  -2699.80    -0.19    -206.81    -0.24
 14   0.1611  -2838.15     0.03    -213.59    -0.01
 15   0.2515  -5487.38     0.04    -349.73     0.01
 16   0.2542  -5564.44     0.01    -354.00     0.01
 17   0.3414  -7612.56    -0.07    -493.19     0.07
 18   0.3415  -7614.41     0.06    -493.47    -0.00
 19   0.3990  -8319.37     0.02    -586.94    -0.02
 20   0.4045  -8353.62    -0.09    -595.75     0.12
 21   0.9803   5601.03     0.18   -1447.72     0.30
 22   0.9831   5607.08    -0.06   -1452.10    -0.10
 23   0.9856   5611.62     0.01   -1455.78    -0.03
 24   1.0432   5332.17     0.08   -1540.57    -0.10
 25   1.0459   5302.06     0.07   -1544.29     0.17
 26   1.0540   5203.05     0.02   -1556.60    -0.15
 27   1.1304   3707.96     0.10   -1671.21    -0.06
 28   1.1305   3705.22     0.09   -1671.42    -0.08
 29   1.1495   3208.78     0.03   -1700.16    -0.08
 30   1.1496   3205.79    -0.01   -1700.29    -0.03
 31   1.1526   3125.80    -0.08   -1705.14    -0.40
 32   1.1526   3125.04    -0.17   -1704.49     0.29
 33   1.2808   -545.82    -0.27   -1896.25     0.15
 34   1.2972   -959.05    -0.07   -1920.18     0.18
 35   1.3765  -2435.41     0.12   -2033.84    -0.04
 36   1.4366  -2799.02     0.07   -2117.05    -0.10
 37   1.9632  11062.49    -0.07   -2879.20    -0.00

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.

13GF137    quality flag:3

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

axisobj        39.360    39.388    39.334
ecceobj         0.155     0.157     0.153
incobj         14.718    14.718    14.718
qmin           32.665    32.742    32.445
qmax           46.885    46.799    46.927
amean          39.457    39.457    39.457
amin           38.990    38.981    39.027
amax           39.981    39.979    39.937
emean           0.155     0.153     0.156
emin            0.134     0.133     0.132
emax            0.174     0.171     0.177
imean          13.860    13.873    13.828
imin           13.305    13.337    13.183
imax           14.476    14.401    14.551
excite_mean     0.285     0.284     0.286
fracstop        1.000     1.000     1.000
cjmean          2.958     2.959     2.959

libcent 0       180.1     180.5     179.4
libamp  0       102.9     112.4      88.5
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       179.3     182.1     178.2
kozaiamp        180.0     179.9     180.0