Orbit Fit and Astrometric record for 13GC137

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: 13GC137   
# Created Thu Oct 19 01:38:13 2017
# Orbit generated from Bernstein formalism
# Fitting   25 observations of   25
# Arc:   1.96y
# First observation: 2013/02/08
#  Last observation: 2015/01/26
Preliminary a, adot, b, bdot, g, gdot:
  -0.000072   0.021757   0.000000  -0.000876   0.023048   0.000000
# Chi-squared of fit:    40.50 DOF:   44 RMS:  0.23
# Min/Max residuals:    -0.66    0.51
# Exact a, adot, b, bdot, g, gdot:
  1.464981E-05  2.161108E-02  1.510540E-06 -8.705038E-04  2.294684E-02  1.007856E-03
# Covariance matrix:
  2.5502E-13 -9.6482E-14  2.8336E-16 -2.8272E-15  1.7292E-13  2.1955E-12
 -9.6482E-14  5.2154E-13  3.3369E-15 -1.9461E-14  2.5331E-13  1.4942E-11
  2.8336E-16  3.3369E-15  1.5372E-13 -1.3583E-13  2.3935E-15  1.5047E-13
 -2.8272E-15 -1.9461E-14 -1.3583E-13  1.9242E-13 -1.5696E-14 -8.8274E-13
  1.7292E-13  2.5331E-13  2.3935E-15 -1.5696E-14  4.0547E-13  1.2087E-11
  2.1955E-12  1.4942E-11  1.5047E-13 -8.8274E-13  1.2087E-11  6.7786E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.191350 -142.769907    0.961631    0.000776   -0.216967  2456332.084338
# Heliocentric elements and errors
Epoch:              2456330.5000  =  2013/02/07
Mean Anomaly:          118.69672 +/-     1.253
Argument of Peri:       53.55538 +/-     1.245
Long of Asc Node:       40.69826 +/-     0.002
Inclination:             2.30977 +/-     0.001
Eccentricity:         0.03052567 +/-    0.0010
Semi-Major Axis:     43.14147118 +/-    0.0052
Time of Perihelion: 2422205.1536 +/-     360.2
Perihelion:          41.82454876 +/-    0.0428
Aphelion:            44.45839360 +/-    0.0428
Period (y)              283.3679 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -35.45105305 +/-    0.0010
Ecliptic Y          -25.72951300 +/-    0.0007
Ecliptic Z            0.14560170 +/-    0.0000
Ecliptic XDOT         0.00145779 +/-    0.0000
Ecliptic YDOT        -0.00212502 +/-    0.0000
Ecliptic ZDOT        -0.00010333 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.80418018 +/-    0.0009
Geocenter to KBO     43.57898530 +/-    0.0012
# Hcoef:  8.09

The following table shows the complete astrometric record for 13GC137. 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 (13GC137) followed by the observatory code and reference code for the source of the astrometry.

2013 02  08.58356  14 19 47.328  -13 44 41.05  24.5r 13GC137   568  C~1XRW      
2013 02  08.65196  14 19 47.275  -13 44 40.53  24.0r 13GC137   568  C~1XRW      
2013 02  08.65608  14 19 47.267  -13 44 40.10        13GC137   568  C~1XRW      
2013 04  04.44170  14 17 30.574  -13 33 27.46  23.7r 13GC137   568  C~1XRW      
2013 04  04.48219  14 17 30.405  -13 33 26.70  24.3r 13GC137   568  C~1XRW      
2013 04  04.52263  14 17 30.244  -13 33 25.95  23.7r 13GC137   568  C~1XRW      
2013 04  06.61498  14 17 21.483  -13 32 41.91        13GC137   568  C~1XRW      
2013 04  08.41579  14 17 13.850  -13 32 04.43  23.6r 13GC137   568  C~1XRW      
2013 05  11.45033  14 14 46.450  -13 19 50.47  24.8r 13GC137   568  C~1XRW      
2013 05  12.44830  14 14 42.137  -13 19 29.05  24.6r 13GC137   568  C~1XRW      
2013 07  04.30754  14 12 01.466  -13 06 18.82  24.3r 13GC137   568  C~1XRW      
2013 07  06.31531  14 11 59.123  -13 06 08.42  24.6r 13GC137   568  C~1XRW      
2014 02  03.58522  14 24 32.371  -14 11 27.56  24.6r 13GC137   568  C~1XRW      
2014 02  25.57248  14 24 16.324  -14 10 15.87  24.9r 13GC137   568  C~1XRW      
2014 02  28.52057  14 24 10.970  -14 09 50.29  24.5r 13GC137   568  C~1XRW      
2014 04  04.42334  14 22 21.243  -14 00 59.65  25.0r 13GC137   568  C~1XRW      
2014 04  04.44293  14 22 21.158  -14 00 59.42  23.9r 13GC137   568  C~1XRW      
2014 04  04.46261  14 22 21.084  -14 00 59.04  24.5r 13GC137   568  C~1XRW      
2014 04  04.48274  14 22 20.993  -14 00 58.60  24.3r 13GC137   568  C~1XRW      
2014 04  05.48108  14 22 16.924  -14 00 38.52  24.2r 13GC137   568  C~1XRW      
2014 04  05.53642  14 22 16.666  -14 00 37.15  24.1r 13GC137   568  C~1XRW      
2014 04  05.56944  14 22 16.502  -14 00 36.88  24.5r 13GC137   568  C~1XRW      
2014 05  22.45377  14 18 50.313  -13 43 48.64  24.6r 13GC137   568  C~1XRW      
2014 05  25.44602  14 18 38.284  -13 42 49.92  24.4r 13GC137   568  C~1XRW      
2015 01  26.64290  14 29 11.690  -14 37 18.77  24.8r 13GC137   568  C~1XRW      

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     0.05       0.00    -0.44
  2   0.0002     -0.90    -0.43       0.24    -0.15
  3   0.0002     -1.15    -0.66       0.61     0.22
  4   0.1502  -2104.11     0.24     -15.64     0.05
  5   0.1503  -2106.69     0.30     -15.73    -0.01
  6   0.1504  -2109.15     0.46     -15.79    -0.04
  7   0.1561  -2244.30     0.15     -16.14     0.46
  8   0.1611  -2361.76     0.24     -17.30    -0.03
  9   0.2515  -4634.69    -0.17     -33.45    -0.07
 10   0.2542  -4701.22     0.20     -34.07    -0.12
 11   0.3990  -7178.81    -0.28     -68.22     0.11
 12   0.4045  -7214.60    -0.19     -69.84    -0.06
 13   0.9856   4446.53    -0.12    -176.95     0.28
 14   1.0458   4202.39     0.04    -184.08    -0.22
 15   1.0539   4120.40     0.03    -184.90    -0.12
 16   1.1495   2437.74    -0.06    -197.61     0.09
 17   1.1495   2436.50    -0.06    -197.79    -0.07
 18   1.1496   2435.36     0.06    -197.78    -0.05
 19   1.1496   2433.96    -0.05    -197.80    -0.04
 20   1.1524   2371.42     0.51    -197.95     0.22
 21   1.1525   2367.43     0.09    -197.87     0.35
 22   1.1526   2365.08    -0.12    -198.39    -0.14
 23   1.2810   -802.34     0.08    -221.72    -0.00
 24   1.2892   -987.20    -0.25    -223.56    -0.11
 25   1.9632   8792.00    -0.11    -353.08    -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.

13GC137    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        42.988    43.005    42.972
ecceobj         0.031     0.032     0.029
incobj          2.314     2.314     2.314
qmin           40.654    40.659    40.730
qmax           46.059    46.161    45.989
amean          43.287    43.305    43.272
amin           42.952    42.971    42.941
amax           43.626    43.650    43.620
emean           0.039     0.041     0.037
emin            0.019     0.021     0.018
emax            0.056     0.058     0.054
imean           1.590     1.596     1.584
imin            0.664     0.671     0.658
imax            2.332     2.331     2.333
excite_mean     0.049     0.051     0.048
fracstop        1.000     1.000     1.000
cjmean          3.090     3.090     3.090

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       160.5     160.3     160.8
kozaiamp        179.9     180.0     180.0