Orbit Fit and Astrometric record for 02GH166

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: 02GH166   
# Created Tue Dec 12 02:37:16 2017
# Orbit generated from Bernstein formalism
# Fitting   33 observations of   38
# Arc:  15.29y
# First observation: 2000/03/03
#  Last observation: 2015/06/19
Preliminary a, adot, b, bdot, g, gdot:
  -0.006797   0.042551   0.001157  -0.006369   0.044897   0.000000
# Chi-squared of fit:    11.24 DOF:   60 RMS:  0.10
# Min/Max residuals:    -0.24    0.39
# Exact a, adot, b, bdot, g, gdot:
  1.816638E-05  3.611427E-02 -2.637868E-06 -5.487054E-03  3.116222E-02 -3.732660E-03
# Covariance matrix:
  4.1341E-13 -6.5453E-14 -9.7864E-15  6.4489E-15 -8.5692E-15 -6.3808E-14
 -6.5453E-14  3.0083E-14  6.8346E-15 -4.5029E-15  6.0962E-15  4.4551E-14
 -9.7864E-15  6.8346E-15  3.5743E-13 -2.6299E-14  5.3992E-16  1.0964E-14
  6.4489E-15 -4.5029E-15 -2.6299E-14  2.7075E-15  9.0812E-16 -7.4047E-15
 -8.5692E-15  6.0962E-15  5.3992E-16  9.0812E-16  1.6012E-13 -1.3142E-14
 -6.3808E-14  4.4551E-14  1.0964E-14 -7.4047E-15 -1.3142E-14  7.3858E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.518943 -171.810608    0.417068    0.007973   -0.905668  2451606.949069
# Heliocentric elements and errors
Epoch:              2451600.5000  =  2000/02/26
Mean Anomaly:          330.55198 +/-     0.006
Argument of Peri:      219.44696 +/-     0.009
Long of Asc Node:       10.76981 +/-     0.000
Inclination:             8.68009 +/-     0.000
Eccentricity:         0.19054328 +/-    0.0000
Semi-Major Axis:     39.02096764 +/-    0.0025
Time of Perihelion: 2458883.3127 +/-       1.4
Perihelion:          31.58578446 +/-    0.0024
Aphelion:            46.45615083 +/-    0.0033
Period (y)              243.7560 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -32.71061258 +/-    0.0004
Ecliptic Y           -4.28445054 +/-    0.0001
Ecliptic Z            0.29059098 +/-    0.0000
Ecliptic XDOT         0.00076634 +/-    0.0000
Ecliptic YDOT        -0.00308755 +/-    0.0000
Ecliptic ZDOT        -0.00048492 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   32.99128878 +/-    0.0004
Geocenter to KBO     32.09014300 +/-    0.0004
# Hcoef:  7.14

The following table shows the complete astrometric record for 02GH166. 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 (02GH166) followed by the observatory code and reference code for the source of the astrometry.

2000 03  03.448326 12 30 54.38   -02 46 16.7   22.2V 02GH166   645  C~2Jx6      
2000 03  03.449156 12 30 54.37   -02 46 16.6   22.2V 02GH166   645  C~2Jx6      
2000 03  03.451643 12 30 54.36   -02 46 16.6   22.9V 02GH166   645  C~2Jx6      
2002 04  03.37286  12 42 31.42   -04 43 38.3   21.5R 02GH166   644  Cl2691      
2002 04  09.04270  12 41 59.38   -04 40 33.0   20.7R 02GH166   807  Cf7585      
2002 04  09.14504  12 41 58.81   -04 40 29.9         02GH166   807  Cf7585      
2002 05  08.34585  12 39 29.86   -04 26 19.4   21.7R 02GH166   568  Cf7585      
2002 05  08.41063  12 39 29.57   -04 26 17.8         02GH166   568  Cf7585      
2011 04  13.41677  13 50 50.012  -14 40 19.76  21.9i 02GH166   F51  C~1vV9      
2011 04  13.42870  13 50 49.943  -14 40 19.41  21.6i 02GH166   F51  C~1vV9      
2011 04  13.57344  13 50 49.057  -14 40 14.78  22.3g 02GH166   F51  C~1vV9      
2012 04  15.42106  13 58 45.075  -15 43 31.87  22.4w 02GH166   F51  C~1vV9      
2012 04  15.43498  13 58 44.987  -15 43 31.53  22.1w 02GH166   F51  C~1vV9      
2012 04  15.44885  13 58 44.896  -15 43 31.15  22.1w 02GH166   F51  C~1vV9      
2012 04  15.46278  13 58 44.819  -15 43 30.79  22.1w 02GH166   F51  C~1vV9      
2014 04  05.47521  14 16 31.314  -17 53 46.11  22.2w 02GH166   F51  C~1vV9      
2014 04  05.48710  14 16 31.245  -17 53 46.00  22.0w 02GH166   F51  C~1vV9      
2014 04  05.49899  14 16 31.181  -17 53 45.57  22.0w 02GH166   F51  C~1vV9      
2014 04  05.51090  14 16 31.103  -17 53 45.33  22.1w 02GH166   F51  C~1vV9      
2014 04  29.41018  14 14 06.847  -17 43 38.10  22.3w 02GH166   F51  C~1vV9      
2014 04  29.42076  14 14 06.803  -17 43 37.24  22.5w 02GH166   F51  C~1vV9      
2014 04  29.43135  14 14 06.711  -17 43 37.33  22.1w 02GH166   F51  C~1vV9      
2014 04  29.44193  14 14 06.652  -17 43 37.06  22.1w 02GH166   F51  C~1vV9      
2014 05  23.31588  14 11 46.530  -17 32 20.59  22.2w 02GH166   F51  C~1vV9      
2014 05  23.32715  14 11 46.463  -17 32 20.33  22.0w 02GH166   F51  C~1vV9      
2014 05  23.33843  14 11 46.401  -17 32 20.08  22.2w 02GH166   F51  C~1vV9      
2014 05  23.34971  14 11 46.346  -17 32 19.73  22.2w 02GH166   F51  C~1vV9      
2015 04  13.19071  14 24 21.48   -18 52 10.0   22.4V 02GH166   W84  C~2J8o      
2015 04  13.33664  14 24 20.61   -18 52 06.7         02GH166   W84  C~2J8o      
2015 04  13.38815  14 24 20.29   -18 52 05.5         02GH166   W84  C~2J8o      
2015 06  18.29546  14 18 18.824  -18 23 37.59  22.3w 02GH166   F51  C~1vV9      
2015 06  18.30776  14 18 18.783  -18 23 37.33  22.2w 02GH166   F51  C~1vV9      
2015 06  18.32004  14 18 18.738  -18 23 37.13  22.1w 02GH166   F51  C~1vV9      
2015 06  18.33234  14 18 18.695  -18 23 36.75  22.2w 02GH166   F51  C~1vV9      
2015 06  19.28262  14 18 15.436  -18 23 17.37  22.3w 02GH166   F51  C~1vV9      
2015 06  19.29451  14 18 15.399  -18 23 17.06  22.5w 02GH166   F51  C~1vV9      
2015 06  19.30641  14 18 15.361  -18 23 16.94  22.6w 02GH166   F51  C~1vV9      
2015 06  19.31830  14 18 15.322  -18 23 16.57  22.1w 02GH166   F51  C~1vV9      

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     0.03       0.00    -0.03
  2   0.0000     -0.18    -0.08       0.03     0.01
  3   0.0000     -0.31    -0.01      -0.03    -0.05
  4   2.0833  12375.45     0.08   -2380.74     0.02
  5   2.0988  11860.35 (   1.05)  -2397.45 (   0.74)
  6   2.0991  11851.26 (   1.34)  -2397.93 (   0.63)
  7   2.1790   9462.37 (   0.95)  -2487.07 (   0.38)
  8   2.1792   9457.74 (   0.87)  -2487.30 (   0.39)
  9  11.1101  86556.76     0.05  -13850.82    -0.14
 10  11.1101  86555.51     0.11  -13850.83    -0.11
 11  11.1105  86539.41    -0.16  -13850.71     0.39
 12  12.1177  95868.87    -0.03  -15325.85     0.11
 13  12.1177  95867.27    -0.05  -15325.94     0.05
 14  12.1177  95865.61    -0.13  -15326.01     0.02
 15  12.1178  95864.19     0.02  -15326.03     0.03
 16  14.0891 117552.37     0.05  -18430.41    -0.03
 17  14.0891 117551.09     0.12  -18430.62    -0.19
 18  14.0891 117549.75     0.13  -18430.45     0.02
 19  14.0892 117548.25    -0.02  -18430.57    -0.05
 20  14.1546 114715.46     0.18  -18459.67    -0.20
 21  14.1546 114714.31 (   0.33) -18458.94 (   0.53)
 22  14.1546 114712.72     0.05  -18459.48    -0.02
 23  14.1547 114711.56     0.20  -18459.47    -0.01
 24  14.2200 111951.13    -0.05  -18400.83     0.11
 25  14.2201 111949.84    -0.12  -18400.88     0.03
 26  14.2201 111948.65    -0.10  -18400.91    -0.03
 27  14.2201 111947.54    -0.00  -18400.79     0.04
 28  15.1095 127701.30    -0.24  -20128.11    -0.10
 29  15.1099 127683.61     0.03  -20128.43    -0.08
 30  15.1100 127677.10    -0.15  -20128.56    -0.12
 31  15.2905 120282.20    -0.05  -19908.49     0.06
 32  15.2905 120281.34     0.00  -19908.40     0.08
 33  15.2905 120280.44     0.01  -19908.39     0.01
 34  15.2906 120279.49    -0.02  -19908.17     0.15
 35  15.2932 120212.01    -0.06  -19902.03    -0.04
 36  15.2932 120211.20    -0.01  -19901.86     0.06
 37  15.2932 120210.46     0.11  -19901.90    -0.06
 38  15.2933 120209.59     0.10  -19901.68     0.09

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.

02GH166    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.011    39.018    39.003
ecceobj         0.190     0.191     0.190
incobj          8.681     8.681     8.681
qmin           30.632    30.626    30.699
qmax           48.918    48.948    48.917
amean          39.456    39.456    39.456
amin           38.972    38.966    38.960
amax           39.996    39.999    40.034
emean           0.204     0.204     0.204
emin            0.183     0.183     0.183
emax            0.225     0.225     0.222
imean           8.605     8.609     8.576
imin            8.061     8.015     8.093
imax            9.418     9.394     9.383
excite_mean     0.253     0.253     0.253
fracstop        1.000     1.000     1.000
cjmean          2.979     2.978     2.979

libcent 0       180.0     179.9     179.4
libamp  0       106.1     102.8     108.9
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       181.6     180.8     182.3
kozaiamp        180.0     180.0     180.0