Orbit Fit and Astrometric record for 13GS137

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: 13GS137   
# Created Mon Oct 23 01:38:14 2017
# Orbit generated from Bernstein formalism
# Fitting   29 observations of   29
# Arc:   4.15y
# First observation: 2013/03/07
#  Last observation: 2017/05/02
Preliminary a, adot, b, bdot, g, gdot:
  -0.000161   0.027256   0.000003  -0.000622   0.025678   0.000000
# Chi-squared of fit:     6.85 DOF:   52 RMS:  0.09
# Min/Max residuals:    -0.32    0.14
# Exact a, adot, b, bdot, g, gdot:
  1.617541E-05  2.700694E-02 -6.508874E-07 -6.167941E-04  2.575078E-02  4.364037E-04
# Covariance matrix:
  1.6560E-13 -1.1102E-13 -1.1932E-15  1.7963E-15  9.8769E-14 -9.8495E-13
 -1.1102E-13  3.1060E-13  1.9291E-15 -6.5158E-15  3.7508E-14  3.2441E-12
 -1.1932E-15  1.9291E-15  7.7541E-14 -3.3854E-14 -7.9296E-16  2.3798E-14
  1.7963E-15 -6.5158E-15 -3.3854E-14  4.1971E-14 -1.0343E-15 -7.8579E-14
  9.8769E-14  3.7508E-14 -7.9296E-16 -1.0343E-15  1.8731E-13  3.6441E-13
 -9.8495E-13  3.2441E-12  2.3798E-14 -7.8579E-14  3.6441E-13  3.9196E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.304209 -143.858243    0.750030    0.026193   -0.649964  2456359.029968
# Heliocentric elements and errors
Epoch:              2456350.5000  =  2013/02/27
Mean Anomaly:          359.34101 +/-     0.122
Argument of Peri:      119.97202 +/-     0.149
Long of Asc Node:       95.82468 +/-     0.008
Inclination:             2.59607 +/-     0.000
Eccentricity:         0.09795123 +/-    0.0001
Semi-Major Axis:     43.77631926 +/-    0.0040
Time of Perihelion: 2456544.1561 +/-      35.8
Perihelion:          39.48837501 +/-    0.0047
Aphelion:            48.06426350 +/-    0.0053
Period (y)              289.6457 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -32.30167490 +/-    0.0005
Ecliptic Y          -22.66100269 +/-    0.0004
Ecliptic Z            1.56130467 +/-    0.0000
Ecliptic XDOT         0.00164769 +/-    0.0000
Ecliptic YDOT        -0.00234705 +/-    0.0000
Ecliptic ZDOT        -0.00006352 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.48869353 +/-    0.0005
Geocenter to KBO     38.83377256 +/-    0.0007
# Hcoef:  7.83

The following table shows the complete astrometric record for 13GS137. 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 (13GS137) followed by the observatory code and reference code for the source of the astrometry.

2013 03  07.52919  14 18 24.281  -11 23 32.32  23.7r 13GS137   568  C~1XRY      
2013 03  07.58437  14 18 24.112  -11 23 31.41  23.9r 13GS137   568  C~1XRY      
2013 03  07.63858  14 18 23.963  -11 23 30.45  24.0r 13GS137   568  C~1XRY      
2013 04  04.53075  14 16 40.293  -11 13 46.73  23.6r 13GS137   568  C~1XRY      
2013 04  07.39123  14 16 27.355  -11 12 37.25  23.5r 13GS137   568  C~1XRY      
2013 04  07.43502  14 16 27.159  -11 12 36.15  23.5r 13GS137   568  C~1XRY      
2013 04  08.42366  14 16 22.619  -11 12 12.17        13GS137   568  C~1XRY      
2013 04  08.46889  14 16 22.398  -11 12 10.91  23.4r 13GS137   568  C~1XRY      
2013 04  09.37047  14 16 18.244  -11 11 48.78  23.7r 13GS137   568  C~1XRY      
2013 04  09.41358  14 16 18.043  -11 11 47.72  23.2r 13GS137   568  C~1XRY      
2013 04  09.45659  14 16 17.836  -11 11 46.69  23.5r 13GS137   568  C~1XRY      
2013 05  11.45828  14 13 43.653  -10 58 40.35  23.6r 13GS137   568  C~1XRY      
2013 05  12.45620  14 13 38.988  -10 58 17.52  23.6r 13GS137   568  C~1XRY      
2013 06  12.35550  14 11 36.411  -10 48 51.74  24.0r 13GS137   568  C~1XRY      
2013 06  12.39986  14 11 36.267  -10 48 51.01  23.4r 13GS137   568  C~1XRY      
2013 07  04.31530  14 10 48.607  -10 45 58.99  23.5r 13GS137   568  C~1XRY      
2013 07  06.32311  14 10 46.293  -10 45 54.51  24.0r 13GS137   568  C~1XRY      
2014 02  24.58174  14 24 43.856  -11 58 14.91  24.0r 13GS137   568  C~1XRY      
2014 02  25.55135  14 24 42.205  -11 58 03.64        13GS137   568  C~1XRY      
2014 02  28.51276  14 24 36.613  -11 57 27.14  24.1r 13GS137   568  C~1XRY      
2014 03  28.44557  14 23 09.168  -11 49 05.93  23.8r 13GS137   568  C~1XRY      
2014 03  28.48463  14 23 09.006  -11 49 05.09  22.4r 13GS137   568  C~1XRY      
2014 04  05.41760  14 22 35.115  -11 46 04.40  23.8r 13GS137   568  C~1XRY      
2014 05  22.41728  14 18 52.095  -11 27 36.70  23.8r 13GS137   568  C~1XRY      
2014 05  28.38945  14 18 26.714  -11 25 40.03  23.5r 13GS137   568  C~1XRY      
2015 04  21.42104  14 27 20.959  -12 11 59.04  23.9r 13GS137   568  C~2KOG      
2015 04  21.48737  14 27 20.634  -12 11 57.38  23.5r 13GS137   568  C~2KOG      
2017 05  02.32616  14 38 29.65   -13 10 41.8   23.5R 13GS137   G37  C~2Fa1      
2017 05  02.39317  14 38 29.30   -13 10 40.2         13GS137   G37  C~2Fa1      

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     0.08       0.00     0.06
  2   0.0002     -2.65    -0.07       0.05    -0.01
  3   0.0003     -5.03    -0.01       0.23     0.06
  4   0.0767  -1637.04     0.05      50.84    -0.02
  5   0.0845  -1839.67    -0.13      53.79     0.07
  6   0.0846  -1842.76    -0.03      53.88     0.14
  7   0.0873  -1913.74     0.06      54.52    -0.07
  8   0.0874  -1917.22    -0.11      54.64     0.03
  9   0.0899  -1982.23     0.03      55.40     0.03
 10   0.0900  -1985.37     0.06      55.43     0.05
 11   0.0902  -1988.59     0.02      55.40     0.01
 12   0.1778  -4391.12     0.12      47.69    -0.11
 13   0.1805  -4463.53     0.11      46.46    -0.07
 14   0.2651  -6355.78     0.02     -19.87    -0.09
 15   0.2652  -6358.02    -0.10     -19.89     0.03
 16   0.3252  -7078.22     0.00     -91.88    -0.02
 17   0.3307  -7111.90    -0.03     -99.04     0.08
 18   0.9693   5951.49    -0.01    -157.07    -0.04
 19   0.9720   5924.90    -0.03    -154.21     0.08
 20   0.9801   5835.38    -0.08    -146.12    -0.00
 21   1.0566   4457.88     0.01     -86.51     0.04
 22   1.0567   4455.35     0.02     -86.49     0.03
 23   1.0784   3925.80     0.03     -76.76    -0.02
 24   1.2071    466.42    -0.14     -96.98     0.04
 25   1.2234     75.65     0.03    -108.94     0.02
 26   2.1215   8401.41     0.04    -197.26    -0.32
 27   2.1217   8396.35     0.08    -197.21    -0.25
 28   4.1528  18845.74     0.09    -457.99     0.13
 29   4.1529  18840.34    -0.10    -458.05     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.

13GS137    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.601    43.614    43.589
ecceobj         0.094     0.095     0.094
incobj          2.595     2.595     2.595
qmin           38.981    38.954    38.980
qmax           49.151    49.119    49.161
amean          43.927    43.940    43.914
amin           43.576    43.583    43.560
amax           44.308    44.320    44.306
emean           0.090     0.091     0.090
emin            0.072     0.074     0.073
emax            0.110     0.110     0.110
imean           0.932     0.931     0.934
imin            0.086     0.088     0.084
imax            1.558     1.558     1.556
excite_mean     0.092     0.093     0.092
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       194.6     198.4     189.8
kozaiamp        180.0     180.0     180.0