Orbit Fit and Astrometric record for 13GY137

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: 13GY137   
# Created Wed Dec 13 02:37:53 2017
# Orbit generated from Bernstein formalism
# Fitting   32 observations of   33
# Arc:   4.30y
# First observation: 2013/02/08
#  Last observation: 2017/05/30
Preliminary a, adot, b, bdot, g, gdot:
  -0.000201   0.025134   0.000011  -0.002330   0.024531   0.000000
# Chi-squared of fit:     9.33 DOF:   58 RMS:  0.10
# Min/Max residuals:    -0.35    0.19
# Exact a, adot, b, bdot, g, gdot:
  1.553289E-05  2.470555E-02 -7.421292E-07 -2.282929E-03  2.440022E-02 -9.489029E-04
# Covariance matrix:
  1.4270E-13 -6.1095E-14 -2.6916E-15  7.4492E-15  9.0653E-14 -7.5860E-13
 -6.1095E-14  3.6893E-13  1.2149E-14 -4.3704E-14  1.1494E-13  4.5485E-12
 -2.6916E-15  1.2149E-14  6.4192E-14 -2.5252E-14  2.2454E-15  1.6736E-13
  7.4492E-15 -4.3704E-14 -2.5252E-14  3.5032E-14 -1.1161E-14 -5.9437E-13
  9.0653E-14  1.1494E-13  2.2454E-15 -1.1161E-14  1.8156E-13  1.1846E-12
 -7.5860E-13  4.5485E-12  1.6736E-13 -5.9437E-13  1.1846E-12  6.1802E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.648230 -145.700571    0.949372    0.003057   -0.265504  2456332.064938
# Heliocentric elements and errors
Epoch:              2456330.5000  =  2013/02/07
Mean Anomaly:          326.37683 +/-     0.131
Argument of Peri:      213.59899 +/-     0.168
Long of Asc Node:       39.91646 +/-     0.000
Inclination:             5.31609 +/-     0.000
Eccentricity:         0.09856697 +/-    0.0002
Semi-Major Axis:     44.78175258 +/-    0.0031
Time of Perihelion: 2466553.6854 +/-      39.9
Perihelion:          40.36775110 +/-    0.0089
Aphelion:            49.19575406 +/-    0.0092
Period (y)              299.6814 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -34.60718108 +/-    0.0006
Ecliptic Y          -22.45668247 +/-    0.0004
Ecliptic Z            0.46362776 +/-    0.0000
Ecliptic XDOT         0.00164148 +/-    0.0000
Ecliptic YDOT        -0.00223074 +/-    0.0000
Ecliptic ZDOT        -0.00025721 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.25741776 +/-    0.0005
Geocenter to KBO     40.98324153 +/-    0.0007
# Hcoef:  7.67

The following table shows the complete astrometric record for 13GY137. 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 (13GY137) followed by the observatory code and reference code for the source of the astrometry.

2013 02  08.56416  14 09 03.396  -12 20 34.09  23.2r 13GY137   568  C~1XRZ      
2013 02  08.62358  14 09 03.350  -12 20 33.57        13GY137   568  C~1XRZ      
2013 03  07.54942  14 08 15.425  -12 16 34.92  23.4r 13GY137   568  C~1XRZ      
2013 03  07.60676  14 08 15.248  -12 16 34.06  23.4r 13GY137   568  C~1XRZ      
2013 04  04.42184  14 06 30.779  -12 07 46.70        13GY137   568  C~1XRZ      
2013 04  04.46233  14 06 30.597  -12 07 45.83        13GY137   568  C~1XRZ      
2013 04  04.50260  14 06 30.408  -12 07 45.00  24.2r 13GY137   568  C~1XRZ      
2013 04  05.55312  14 06 25.731  -12 07 21.09  23.8r 13GY137   568  C~1XRZ      
2013 04  05.55702  14 06 25.733  -12 07 21.24  23.7r 13GY137   568  C~1XRZ      
2013 04  06.59497  14 06 21.089  -12 06 57.80  23.7r 13GY137   568  C~1XRZ      
2013 04  07.41104  14 06 17.420  -12 06 39.32  23.5r 13GY137   568  C~1XRZ      
2013 04  07.45481  14 06 17.220  -12 06 38.37  23.8r 13GY137   568  C~1XRZ      
2013 04  08.39569  14 06 12.969  -12 06 16.78  23.7r 13GY137   568  C~1XRZ      
2013 04  08.44342  14 06 12.751  -12 06 15.68  23.2r 13GY137   568  C~1XRZ      
2013 04  08.48862  14 06 12.551  -12 06 14.76  23.8r 13GY137   568  C~1XRZ      
2013 04  09.39005  14 06 08.442  -12 05 54.02  23.9r 13GY137   568  C~1XRZ      
2013 04  09.43325  14 06 08.240  -12 05 53.04  23.5r 13GY137   568  C~1XRZ      
2013 04  09.47643  14 06 08.035  -12 05 52.03  23.1r 13GY137   568  C~1XRZ      
2013 05  12.42771  14 03 34.537  -11 53 03.95  23.4r 13GY137   568  C~1XRZ      
2013 06  13.26550  14 01 37.005  -11 43 36.88  24.0r 13GY137   568  C~1XRZ      
2013 06  13.30597  14 01 36.901  -11 43 36.43  23.9r 13GY137   568  C~1XRZ      
2013 07  06.29463  14 00 55.250  -11 40 43.54        13GY137   568  C~1XRZ      
2014 02  25.52781  14 14 00.562  -12 54 46.09  23.7r 13GY137   568  C~1XRZ      
2014 02  27.63879  14 13 56.204  -12 54 25.22  23.7r 13GY137   568  C~1XRZ      
2014 03  28.43390  14 12 23.784  -12 46 52.32  23.3r 13GY137   568  C~1XRZ      
2014 03  28.47295  14 12 23.621  -12 46 51.54  24.0r 13GY137   568  C~1XRZ      
2014 04  05.40246  14 11 49.807  -12 44 04.95  23.8r 13GY137   568  C~1XRZ      
2014 06  26.31316  14 06 25.474  -12 18 03.12  24.1r 13GY137   568  C~1XRZ      
2014 06  26.31711  14 06 25.475  -12 18 03.06  24.0r 13GY137   568  C~1XRZ      
2015 01  26.63271  14 19 36.115  -13 31 14.88  23.8r 13GY137   568  C~1XRZ      
2017 05  25.46246  14 24 19.746  -14 14 06.51  23.7r 13GY137   568  C~2KOG      
2017 05  30.28159  14 23 59.835  -14 12 35.27  23.5r 13GY137   568  C~2KOG      
2017 05  30.34663  14 23 59.567  -14 12 34.02  23.5r 13GY137   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     0.10       0.00    -0.15
  2   0.0002     -0.81    -0.13       0.26     0.16
  3   0.0739   -742.51     0.19     -11.53     0.02
  4   0.0740   -745.24     0.11     -11.59     0.01
  5   0.1502  -2365.07    -0.06     -32.69    -0.09
  6   0.1503  -2367.88    -0.05     -32.77    -0.11
  7   0.1504  -2370.77    -0.13     -32.93    -0.21
  8   0.1533  -2443.41    -0.35     -33.66     0.10
  9   0.1533  -2443.34     0.00     -33.79    -0.02
 10   0.1561  -2515.37     0.04     -34.80     0.00
 11   0.1584  -2572.26    -0.08     -35.64    -0.08
 12   0.1585  -2575.35    -0.04     -35.74    -0.12
 13   0.1611  -2641.33    -0.01     -36.56     0.01
 14   0.1612  -2644.71     0.02     -36.60     0.03
 15   0.1613  -2647.78     0.19     -36.73    -0.03
 16   0.1638  -2711.52     0.03     -37.64    -0.04
 17   0.1639  -2714.64     0.02     -37.72    -0.06
 18   0.1640  -2717.81    -0.04     -37.79    -0.06
 19   0.2542  -5097.89     0.10     -81.28     0.04
 20   0.3414  -6915.02    -0.07    -138.49     0.07
 21   0.3415  -6916.61     0.08    -138.59     0.07
 22   0.4045  -7551.35     0.02    -186.09     0.03
 23   1.0458   4786.18    -0.09    -480.59     0.10
 24   1.0515   4719.11    -0.06    -482.05     0.03
 25   1.1304   3293.27     0.11    -504.60     0.13
 26   1.1305   3290.76     0.11    -504.66     0.13
 27   1.1522   2768.72 (   0.47)   -512.66 (   0.07)
 28   1.3765  -2229.50    -0.06    -639.06     0.07
 29   1.3765  -2229.50     0.05    -639.00     0.14
 30   1.9632  10140.97     0.02    -934.31     0.00
 31   4.2899  14900.02    -0.04   -2030.63    -0.01
 32   4.3031  14594.98     0.03   -2037.40    -0.10
 33   4.3033  14590.87    -0.01   -2037.48    -0.05

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.

13GY137    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.613    44.622    44.604
ecceobj         0.097     0.097     0.097
incobj          5.324     5.324     5.324
qmin           39.878    39.907    39.890
qmax           50.286    50.301    50.301
amean          44.950    44.958    44.940
amin           44.595    44.589    44.573
amax           45.348    45.342    45.328
emean           0.096     0.096     0.096
emin            0.082     0.082     0.082
emax            0.110     0.109     0.110
imean           4.439     4.440     4.438
imin            3.876     3.878     3.873
imax            4.977     4.976     4.978
excite_mean     0.123     0.123     0.123
fracstop        1.000     1.000     1.000
cjmean          3.094     3.095     3.094

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       181.1     181.2     180.9
kozaiamp        180.0     180.0     180.0