Orbit Fit and Astrometric record for 13GW136

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: 13GW136   
# Created Thu Dec 14 02:37:53 2017
# Orbit generated from Bernstein formalism
# Fitting   31 observations of   31
# Arc:   2.12y
# First observation: 2013/03/07
#  Last observation: 2015/04/20
Preliminary a, adot, b, bdot, g, gdot:
  -0.000375   0.038547  -0.000030   0.004502   0.030685   0.000000
# Chi-squared of fit:     5.91 DOF:   56 RMS:  0.08
# Min/Max residuals:    -0.15    0.32
# Exact a, adot, b, bdot, g, gdot:
  1.919856E-05  3.801341E-02  2.098882E-06  4.423790E-03  3.086657E-02 -5.288303E-03
# Covariance matrix:
  1.6583E-13 -7.4301E-14 -5.2589E-18  2.1806E-16  8.1746E-14  3.2711E-14
 -7.4301E-14  4.8946E-13 -1.4601E-14  6.1064E-14  2.1101E-13  6.7385E-12
 -5.2589E-18 -1.4601E-14  1.1220E-13 -7.9397E-14 -7.5973E-15 -2.4735E-13
  2.1806E-16  6.1064E-14 -7.9397E-14  1.0102E-13  3.2064E-14  1.0344E-12
  8.1746E-14  2.1101E-13 -7.5973E-15  3.2064E-14  2.3083E-13  3.5511E-12
  3.2711E-14  6.7385E-12 -2.4735E-13  1.0344E-12  3.5511E-12  1.1415E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.163943 -140.699587    0.783951   -0.001709   -0.609198  2456359.103668
# Heliocentric elements and errors
Epoch:              2456350.5000  =  2013/02/27
Mean Anomaly:          342.33591 +/-     0.021
Argument of Peri:       35.53147 +/-     0.050
Long of Asc Node:      219.31274 +/-     0.000
Inclination:             6.67129 +/-     0.000
Eccentricity:         0.34169847 +/-    0.0002
Semi-Major Axis:     47.58944173 +/-    0.0081
Time of Perihelion: 2462234.2343 +/-       6.8
Perihelion:          31.32820241 +/-    0.0111
Aphelion:            63.85068105 +/-    0.0146
Period (y)              328.3024 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -26.03693576 +/-    0.0004
Ecliptic Y          -20.29722786 +/-    0.0003
Ecliptic Z           -0.09261595 +/-    0.0000
Ecliptic XDOT         0.00249149 +/-    0.0000
Ecliptic YDOT        -0.00231212 +/-    0.0000
Ecliptic ZDOT         0.00039387 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.01375562 +/-    0.0004
Geocenter to KBO     32.39750649 +/-    0.0005
# Hcoef:  7.68

The following table shows the complete astrometric record for 13GW136. 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 (13GW136) followed by the observatory code and reference code for the source of the astrometry.

2013 03  07.60289  14 27 24.291  -14 44 53.37  22.3r 13GW136   568  C~1XRW      
2013 04  04.54664  14 25 30.072  -14 34 26.45  22.7r 13GW136   568  C~1XRW      
2013 04  07.40716  14 25 15.362  -14 33 06.85  22.7r 13GW136   568  C~1XRW      
2013 04  07.45089  14 25 15.127  -14 33 05.69  22.6r 13GW136   568  C~1XRW      
2013 04  08.43954  14 25 09.938  -14 32 37.75  22.4r 13GW136   568  C~1XRW      
2013 04  08.48474  14 25 09.710  -14 32 36.50  22.4r 13GW136   568  C~1XRW      
2013 04  09.38613  14 25 04.945  -14 32 10.69  22.7r 13GW136   568  C~1XRW      
2013 04  09.42936  14 25 04.721  -14 32 09.49  22.6r 13GW136   568  C~1XRW      
2013 04  09.47254  14 25 04.488  -14 32 08.30  22.8r 13GW136   568  C~1XRW      
2013 05  11.47420  14 22 05.092  -14 15 56.26  22.6r 13GW136   568  C~1XRW      
2013 06  12.37153  14 19 34.135  -14 01 53.33        13GW136   568  C~1XRW      
2013 06  12.41652  14 19 33.968  -14 01 52.43  22.8r 13GW136   568  C~1XRW      
2013 08  02.26651  14 18 41.651  -13 55 08.18  23.0r 13GW136   568  C~1XRW      
2013 08  05.26716  14 18 47.622  -13 55 30.05  23.0r 13GW136   568  C~1XRW      
2014 02  01.63271  14 36 43.724  -15 14 56.90  22.8r 13GW136   568  C~1XRW      
2014 02  02.63050  14 36 45.063  -15 15 00.36  22.9r 13GW136   568  C~1XRW      
2014 02  03.57515  14 36 46.213  -15 15 03.16  22.9r 13GW136   568  C~1XRW      
2014 02  25.59980  14 36 41.873  -15 13 41.83  23.0r 13GW136   568  C~1XRW      
2014 04  04.45085  14 34 32.009  -15 01 43.73  22.6r 13GW136   568  C~1XRW      
2014 04  04.49069  14 34 31.806  -15 01 42.70  22.8r 13GW136   568  C~1XRW      
2014 04  05.57974  14 34 26.343  -15 01 13.82  22.8r 13GW136   568  C~1XRW      
2014 05  22.42509  14 30 06.242  -14 38 23.46  22.7r 13GW136   568  C~1XRW      
2014 05  25.35772  14 29 51.028  -14 37 02.39  22.5r 13GW136   568  C~1XRW      
2014 06  26.34615  14 27 43.560  -14 25 24.60  22.8r 13GW136   568  C~1XRW      
2014 07  18.30910  14 27 12.350  -14 22 00.89  22.8r 13GW136   568  C~1XRW      
2014 07  18.31323  14 27 12.350  -14 22 00.87  22.9r 13GW136   568  C~1XRW      
2015 01  26.61229  14 45 25.555  -15 39 25.86  22.9r 13GW136   568  C~1XRW      
2015 04  18.40695  14 42 29.148  -15 21 41.54  22.6r 13GW136   568  C~2KOF      
2015 04  20.42535  14 42 17.865  -15 20 44.02  22.4r 13GW136   568  C~2KOF      
2015 04  20.43040  14 42 17.866  -15 20 43.92  24.6u 13GW136   568  C~2KOF      
2015 04  20.46573  14 42 17.630  -15 20 42.88  22.5r 13GW136   568  C~2KOF      

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     0.06       0.00     0.03
  2   0.0765  -1770.95     0.06      64.87     0.05
  3   0.0843  -1998.78     0.01      71.84     0.06
  4   0.0845  -2002.38     0.00      71.85    -0.01
  5   0.0872  -2082.71    -0.08      74.16    -0.10
  6   0.0873  -2086.25     0.13      74.28    -0.06
  7   0.0898  -2160.07    -0.03      76.54    -0.04
  8   0.0899  -2163.53     0.12      76.63    -0.02
  9   0.0900  -2167.12     0.14      76.68    -0.06
 10   0.1776  -4948.58    -0.05     156.90     0.01
 11   0.2649  -7301.11    -0.12     240.35     0.07
 12   0.2651  -7303.70    -0.09     240.41     0.02
 13   0.4043  -8156.73    -0.05     373.73     0.02
 14   0.4125  -8067.28    -0.03     381.51     0.09
 15   0.9063   8266.95    -0.06     827.49    -0.04
 16   0.9090   8286.48    -0.05     830.18     0.05
 17   0.9116   8303.20    -0.13     832.65     0.03
 18   0.9719   8218.24    -0.03     890.69     0.04
 19   1.0756   6205.39    -0.05     991.37    -0.03
 20   1.0757   6202.27    -0.05     991.44    -0.05
 21   1.0786   6117.99    -0.03     994.29    -0.03
 22   1.2069   2105.25     0.10    1114.48     0.02
 23   1.2149   1870.11     0.06    1121.71     0.05
 24   1.3025   -106.64     0.01    1197.05    -0.01
 25   1.3626   -601.35     0.04    1245.87    -0.08
 26   1.3627   -601.36     0.05    1245.89    -0.07
 27   1.8891  15928.79     0.08    1720.74     0.01
 28   2.1131  13163.33    -0.10    1969.82     0.03
 29   2.1186  12989.68    -0.10    1975.30    -0.01
 30   2.1186  12989.66     0.32    1975.40     0.08
 31   2.1187  12986.08    -0.15    1975.36    -0.04

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.

13GW136    quality flag:3

Type:           2:1E      2:1E      2:1E

axisobj        47.388    47.404    47.372
ecceobj         0.340     0.341     0.340
incobj          6.679     6.679     6.679
qmin           30.609    30.616    30.611
qmax           65.914    66.086    65.807
amean          47.797    47.797    47.797
amin           47.188    47.180    47.180
amax           48.571    48.571    48.571
emean           0.318     0.311     0.315
emin            0.276     0.257     0.268
emax            0.359     0.361     0.359
imean          10.718    11.304    10.938
imin            7.247     7.253     7.242
imax           13.671    14.877    14.119
excite_mean     0.371     0.371     0.371
fracstop        1.000     1.000     1.000
cjmean          2.974     2.974     2.974

libcent 0       281.4     278.2     280.4
libamp  0        41.7      45.3      42.8
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        75.9      88.0      74.8
kozaiamp        180.0     180.0     180.0