Orbit Fit and Astrometric record for 13GX137

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: 13GX137   
# Created Sun Oct 22 01:38:14 2017
# Orbit generated from Bernstein formalism
# Fitting   44 observations of   44
# Arc:   4.29y
# First observation: 2013/02/08
#  Last observation: 2017/05/25
Preliminary a, adot, b, bdot, g, gdot:
  -0.000143   0.023179   0.000008  -0.001608   0.023755   0.000000
# Chi-squared of fit:    28.03 DOF:   82 RMS:  0.14
# Min/Max residuals:    -0.37    0.38
# Exact a, adot, b, bdot, g, gdot:
  1.604909E-05  2.281040E-02  7.245301E-07 -1.578135E-03  2.359300E-02 -7.851333E-04
# Covariance matrix:
  1.1074E-13 -4.6725E-14 -1.8528E-15  3.3166E-15  6.8583E-14 -6.3440E-13
 -4.6725E-14  2.1958E-13  5.0723E-15 -1.8141E-14  7.6199E-14  3.5002E-12
 -1.8528E-15  5.0723E-15  5.2894E-14 -2.5416E-14  2.7910E-16  9.9220E-14
  3.3166E-15 -1.8141E-14 -2.5416E-14  3.2412E-14 -5.6132E-15 -3.4113E-13
  6.8583E-14  7.6199E-14  2.7910E-16 -5.6132E-15  1.3864E-13  1.0908E-12
 -6.3440E-13  3.5002E-12  9.9220E-14 -3.4113E-13  1.0908E-12  6.5796E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.263475 -145.280780    0.951292    0.005754   -0.258495  2456332.064938
# Heliocentric elements and errors
Epoch:              2456330.5000  =  2013/02/07
Mean Anomaly:          286.03201 +/-     0.069
Argument of Peri:      242.58002 +/-     0.107
Long of Asc Node:       51.09062 +/-     0.002
Inclination:             4.13445 +/-     0.000
Eccentricity:         0.05630834 +/-    0.0003
Semi-Major Axis:     43.19497642 +/-    0.0025
Time of Perihelion: 2477635.8964 +/-      19.9
Perihelion:          40.76273922 +/-    0.0152
Aphelion:            45.62721363 +/-    0.0152
Period (y)              283.8952 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -35.58327822 +/-    0.0006
Ecliptic Y          -23.49839225 +/-    0.0004
Ecliptic Z            0.93462437 +/-    0.0000
Ecliptic XDOT         0.00157297 +/-    0.0000
Ecliptic YDOT        -0.00212520 +/-    0.0000
Ecliptic ZDOT        -0.00018496 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.65228774 +/-    0.0005
Geocenter to KBO     42.38544689 +/-    0.0007
# Hcoef:  7.46

The following table shows the complete astrometric record for 13GX137. 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 (13GX137) followed by the observatory code and reference code for the source of the astrometry.

2013 02  08.56416  14 11 31.100  -11 54 13.98  23.9r 13GX137   568  C~1XRZ      
2013 02  08.61375  14 11 31.065  -11 54 13.51  24.2r 13GX137   568  C~1XRZ      
2013 02  08.61869  14 11 31.085  -11 54 13.56  23.7r 13GX137   568  C~1XRZ      
2013 02  08.62358  14 11 31.091  -11 54 13.72  23.9r 13GX137   568  C~1XRZ      
2013 03  07.54942  14 10 45.378  -11 49 53.99  23.2r 13GX137   568  C~1XRZ      
2013 03  07.60676  14 10 45.203  -11 49 53.03  23.5r 13GX137   568  C~1XRZ      
2013 04  04.42185  14 09 04.433  -11 41 01.20  24.0r 13GX137   568  C~1XRZ      
2013 04  04.46234  14 09 04.256  -11 41 00.45  23.5r 13GX137   568  C~1XRZ      
2013 04  04.50260  14 09 04.079  -11 40 59.48  23.5r 13GX137   568  C~1XRZ      
2013 04  04.55066  14 09 03.877  -11 40 58.49  23.5r 13GX137   568  C~1XRZ      
2013 04  05.55312  14 08 59.561  -11 40 36.17  22.9r 13GX137   568  C~1XRZ      
2013 04  05.55702  14 08 59.539  -11 40 35.96  23.2r 13GX137   568  C~1XRZ      
2013 04  06.59497  14 08 55.045  -11 40 12.82  23.1r 13GX137   568  C~1XRZ      
2013 04  07.41104  14 08 51.482  -11 39 54.30  23.7r 13GX137   568  C~1XRZ      
2013 04  07.45481  14 08 51.316  -11 39 53.43  23.5r 13GX137   568  C~1XRZ      
2013 04  08.39569  14 08 47.195  -11 39 31.98  24.1r 13GX137   568  C~1XRZ      
2013 04  08.44342  14 08 46.990  -11 39 30.98  23.9r 13GX137   568  C~1XRZ      
2013 04  08.48862  14 08 46.787  -11 39 30.08  22.9r 13GX137   568  C~1XRZ      
2013 04  09.39004  14 08 42.817  -11 39 09.59  23.0r 13GX137   568  C~1XRZ      
2013 04  09.43325  14 08 42.611  -11 39 08.46  23.3r 13GX137   568  C~1XRZ      
2013 04  09.47643  14 08 42.412  -11 39 07.51  23.2r 13GX137   568  C~1XRZ      
2013 05  11.42609  14 06 17.459  -11 26 54.10  23.8r 13GX137   568  C~1XRZ      
2013 05  12.42771  14 06 13.109  -11 26 32.43  23.7r 13GX137   568  C~1XRZ      
2013 06  13.26550  14 04 17.477  -11 17 21.69  23.8r 13GX137   568  C~1XRZ      
2013 06  13.30597  14 04 17.352  -11 17 21.17  24.0r 13GX137   568  C~1XRZ      
2013 07  04.28711  14 03 37.154  -11 14 40.84  23.7r 13GX137   568  C~1XRZ      
2013 07  06.29463  14 03 35.145  -11 14 35.41  23.6r 13GX137   568  C~1XRZ      
2014 02  25.52781  14 16 07.085  -12 23 31.54  23.7r 13GX137   568  C~1XRZ      
2014 02  27.63879  14 16 02.902  -12 23 08.82  23.7r 13GX137   568  C~1XRZ      
2014 03  27.43390  14 14 37.735  -12 15 42.85        13GX137   568  C~1XRZ      
2014 03  27.45320  14 14 37.662  -12 15 42.89  24.3r 13GX137   568  C~1XRZ      
2014 03  28.42997  14 14 33.810  -12 15 22.96  23.4r 13GX137   568  C~1XRZ      
2014 03  28.46901  14 14 33.665  -12 15 22.27  23.7r 13GX137   568  C~1XRZ      
2014 04  05.39741  14 14 00.943  -12 12 35.12  23.9r 13GX137   568  C~1XRZ      
2014 05  22.38158  14 10 31.051  -11 55 15.35  23.8r 13GX137   568  C~1XRZ      
2014 05  25.45403  14 10 18.793  -11 54 16.76  23.5r 13GX137   568  C~1XRZ      
2014 05  25.45812  14 10 18.801  -11 54 16.87  23.3r 13GX137   568  C~1XRZ      
2014 05  28.35824  14 10 07.625  -11 53 23.99  24.0r 13GX137   568  C~1XRZ      
2015 01  26.63271  14 21 19.003  -12 56 03.45  23.5r 13GX137   568  C~1XRZ      
2015 03  21.61206  14 20 01.770  -12 49 07.34  23.6r 13GX137   568  C~2KOG      
2016 05  07.36834  14 21 39.334  -13 03 41.14  23.7r 13GX137   568  C~2KOG      
2016 05  07.43430  14 21 39.030  -13 03 39.74  23.4r 13GX137   568  C~2KOG      
2016 05  29.34785  14 20 05.036  -12 56 20.36  23.9w 13GX137   568  C~2KOG      
2017 05  25.46246  14 25 26.850  -13 28 55.45  23.6r 13GX137   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    -0.16       0.00    -0.37
  2   0.0001     -0.64    -0.33       0.27    -0.12
  3   0.0001     -0.35     0.01       0.32    -0.07
  4   0.0002     -0.21     0.20       0.20    -0.19
  5   0.0739   -719.48     0.01      20.54     0.03
  6   0.0740   -722.22    -0.17      20.58     0.07
  7   0.1502  -2294.80    -0.10      25.12     0.07
  8   0.1503  -2297.51    -0.06      24.95    -0.07
  9   0.1504  -2300.28    -0.10      24.99    -0.01
 10   0.1505  -2303.41     0.03      24.92    -0.04
 11   0.1533  -2370.63    -0.04      24.63    -0.09
 12   0.1533  -2371.00    -0.15      24.71     0.00
 13   0.1561  -2440.97    -0.03      24.31    -0.11
 14   0.1584  -2496.50    -0.35      24.14    -0.08
 15   0.1585  -2499.08     0.09      24.14    -0.05
 16   0.1611  -2563.32     0.07      23.98     0.08
 17   0.1612  -2566.49     0.21      23.90     0.05
 18   0.1613  -2569.61     0.25      23.75    -0.07
 19   0.1638  -2631.43     0.27      23.42    -0.11
 20   0.1639  -2634.66     0.06      23.47    -0.03
 21   0.1640  -2637.73     0.02      23.38    -0.08
 22   0.2515  -4891.30     0.06      -5.20    -0.05
 23   0.2542  -4958.86     0.18      -6.46     0.11
 24   0.3414  -6746.76    -0.05     -65.45     0.16
 25   0.3415  -6748.67    -0.22     -65.58     0.13
 26   0.3990  -7359.99     0.20    -116.14    -0.10
 27   0.4045  -7389.67    -0.11    -121.11     0.05
 28   1.0458   4401.74     0.18    -313.54     0.13
 29   1.0515   4336.36     0.11    -312.32     0.17
 30   1.1276   3010.61    -0.13    -304.36     0.38
 31   1.1277   3009.61     0.06    -304.75    -0.00
 32   1.1304   2949.72    -0.17    -304.67     0.14
 33   1.1305   2947.49     0.04    -304.72     0.11
 34   1.1522   2439.43    -0.03    -306.17     0.17
 35   1.2808   -810.02    -0.17    -352.70     0.06
 36   1.2892   -999.17    -0.12    -357.78     0.19
 37   1.2892   -999.02     0.28    -357.85     0.14
 38   1.2972  -1171.30     0.13    -363.02     0.05
 39   1.9632   9360.08     0.23    -661.48    -0.14
 40   2.1110   8154.58    -0.06    -636.23    -0.15
 41   3.2411   9790.91    -0.10    -998.03    -0.02
 42   3.2413   9786.24    -0.02    -998.15    -0.04
 43   3.3013   8341.47    -0.09   -1030.25    -0.15
 44   4.2899  13435.42     0.03   -1358.22    -0.12

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.

13GX137    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.044    43.052    43.037
ecceobj         0.058     0.058     0.058
incobj          4.139     4.139     4.139
qmin           40.205    40.208    40.174
qmax           46.682    46.689    46.684
amean          43.351    43.358    43.343
amin           43.007    43.016    43.002
amax           43.706    43.719    43.702
emean           0.050     0.050     0.050
emin            0.029     0.030     0.029
emax            0.069     0.069     0.069
imean           2.605     2.610     2.601
imin            1.707     1.714     1.697
imax            3.525     3.526     3.526
excite_mean     0.068     0.068     0.068
fracstop        1.000     1.000     1.000
cjmean          3.088     3.088     3.088

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       186.1     185.8     185.6
kozaiamp        179.9     180.0     180.0