Orbit Fit and Astrometric record for 02GF32

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: 02GF32    
# Created Sat Oct 21 01:37:18 2017
# Orbit generated from Bernstein formalism
# Fitting   24 observations of   25
# Arc:  13.04y
# First observation: 2002/04/08
#  Last observation: 2015/04/24
Preliminary a, adot, b, bdot, g, gdot:
   0.000074   0.021862  -0.000008  -0.001062   0.024100   0.000000
# Chi-squared of fit:    15.78 DOF:   42 RMS:  0.14
# Min/Max residuals:    -0.51    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.424179E-05  2.222021E-02 -1.718106E-06 -1.081045E-03  2.423124E-02  3.799261E-03
# Covariance matrix:
  3.7821E-13 -1.8549E-13 -3.9399E-15  8.1584E-15  2.9872E-13 -5.7960E-13
 -1.8549E-13  2.4052E-13  5.5900E-15 -1.1500E-14 -8.0011E-14  8.1805E-13
 -3.9399E-15  5.5900E-15  7.4791E-14 -8.3680E-15 -1.5190E-15  1.9478E-14
  8.1584E-15 -1.1500E-14 -8.3680E-15  5.5991E-15  3.1990E-15 -4.0060E-14
  2.9872E-13 -8.0011E-14 -1.5190E-15  3.1990E-15  3.6179E-13 -2.2654E-13
 -5.7960E-13  8.1805E-13  1.9478E-14 -4.0060E-14 -2.2654E-13  2.8497E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.144781 -138.051226    0.401334    0.002280   -0.919958  2452372.636773
# Heliocentric elements and errors
Epoch:              2452370.5000  =  2002/04/06
Mean Anomaly:          105.76206 +/-     0.048
Argument of Peri:       53.09578 +/-     0.034
Long of Asc Node:       44.31201 +/-     0.000
Inclination:             2.78297 +/-     0.000
Eccentricity:         0.17819105 +/-    0.0000
Semi-Major Axis:     39.22999547 +/-    0.0046
Time of Perihelion: 2426003.9551 +/-      11.1
Perihelion:          32.23956141 +/-    0.0041
Aphelion:            46.22042954 +/-    0.0057
Period (y)              245.7172 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -31.64483219 +/-    0.0008
Ecliptic Y          -27.89825425 +/-    0.0007
Ecliptic Z            0.10419532 +/-    0.0000
Ecliptic XDOT         0.00135041 +/-    0.0000
Ecliptic YDOT        -0.00215580 +/-    0.0000
Ecliptic ZDOT        -0.00012084 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.18671416 +/-    0.0007
Geocenter to KBO     41.26903434 +/-    0.0010
# Hcoef:  5.83

The following table shows the complete astrometric record for 02GF32. 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 (02GF32) followed by the observatory code and reference code for the source of the astrometry.

2002 04  08.13603  14 38 13.38   -15 16 57.6   21.1R 02GF32    807  Cf5154      
2002 04  08.22273  14 38 13.00   -15 16 55.9         02GF32    807  Cf5154      
2002 04  09.36795  14 38 08.02   -15 16 33.4         02GF32    807  Cf5154      
2002 06  07.30424  14 33 41.64   -14 56 18.3         02GF32    568  Cf8972      
2002 06  07.30783  14 33 41.63   -14 56 18.2         02GF32    568  Cf8972      
2002 06  07.31454  14 33 41.61   -14 56 18.1         02GF32    568  Cf8972      
2002 06  07.32242  14 33 41.57   -14 56 18.0         02GF32    568  Cf8972      
2002 06  07.32754  14 33 41.55   -14 56 17.9         02GF32    568  Cf8972      
2002 06  07.33125  14 33 41.54   -14 56 17.8         02GF32    568  Cf8972      
2002 06  07.33487  14 33 41.53   -14 56 17.7         02GF32    568  Cf8972      
2002 06  07.34156  14 33 41.50   -14 56 17.7         02GF32    568  Cf8972      
2002 06  07.34944  14 33 41.47   -14 56 17.5         02GF32    568  Cf8972      
2002 06  07.35457  14 33 41.45   -14 56 17.4         02GF32    568  Cf8972      
2002 06  12.20771  14 33 24.07   -14 54 59.1   21.7R 02GF32    688  Cf7381      
2002 06  12.30815  14 33 23.78   -14 54 56.3         02GF32    688  Cf7381      
2003 05  30.19331  14 39 10.40   -15 25 49.4   21.5R 02GF32    807  Ci2129      
2003 05  30.27877  14 39 10.02   -15 25 47.5         02GF32    807  Ci2129      
2003 05  31.11193  14 39 06.56   -15 25 32.1   21.4R 02GF32    807  Ci2129      
2003 05  31.14014  14 39 06.43   -15 25 31.4         02GF32    807  Ci2129      
2003 05  31.20217  14 39 06.17   -15 25 30.4         02GF32    807  Ci2129      
2003 06  01.03225  14 39 02.74   -15 25 15.1         02GF32    807  Ci2129      
2004 03  16.39418  14 49 24.84   -16 15 20.9   22.5R 02GF32    695  Ck4262      
2004 03  16.48630  14 49 24.56   -16 15 19.6         02GF32    695  Ck4262      
2015 04  24.35518  15 40 26.46   -20 13 05.2   22.6R 02GF32    G37  C~1ReA      
2015 04  24.44903  15 40 26.06   -20 13 03.5         02GF32    G37  C~1ReA      

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     0.21
  2   0.0002     -5.75     0.05      -0.07     0.22
  3   0.0034    -81.24     0.12      -0.76     0.17
  4   0.1647  -4126.07    -0.07     -37.97     0.03
  5   0.1647  -4126.23    -0.03     -37.92     0.09
  6   0.1648  -4126.54     0.05     -37.91     0.10
  7   0.1648  -4127.12    -0.08     -38.00     0.02
  8   0.1648  -4127.43    -0.09     -37.99     0.03
  9   0.1648  -4127.60    -0.04     -37.94     0.09
 10   0.1648  -4127.77    -0.00     -37.89     0.14
 11   0.1648  -4128.18    -0.03     -38.03     0.01
 12   0.1649  -4128.66    -0.05     -37.98     0.08
 13   0.1649  -4128.96    -0.06     -37.97     0.09
 14   0.1782  -4392.83     0.10     -42.10    -0.51
 15   0.1784  -4397.70 (   0.56)    -40.75 (   0.93)
 16   1.1418    947.98     0.15    -253.75    -0.24
 17   1.1421    942.17    -0.14    -253.62    -0.05
 18   1.1444    889.83     0.16    -254.25    -0.16
 19   1.1444    887.82    -0.03    -254.16    -0.04
 20   1.1446    883.94     0.06    -254.35    -0.18
 21   1.1469    832.04     0.08    -254.95    -0.30
 22   1.9391  10305.94    -0.01    -429.79    -0.01
 23   1.9394  10301.69    -0.19    -429.73     0.13
 24  13.0437  57537.93    -0.07   -2856.13    -0.21
 25  13.0440  57531.61     0.08   -2855.72     0.28

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.

02GF32    quality flag:3

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

axisobj        39.071    39.084    39.057
ecceobj         0.178     0.178     0.178
incobj          2.790     2.790     2.790
qmin           31.907    31.901    31.915
qmax           47.607    47.604    47.681
amean          39.457    39.457    39.457
amin           38.978    38.996    38.979
amax           39.991    39.984    40.005
emean           0.174     0.174     0.174
emin            0.157     0.156     0.157
emax            0.192     0.191     0.192
imean           1.977     2.001     1.947
imin            1.399     1.458     1.336
imax            2.551     2.548     2.543
excite_mean     0.178     0.178     0.178
fracstop        1.000     1.000     1.000
cjmean          3.016     3.016     3.016

libcent 0       179.6     180.0     179.7
libamp  0       100.5      96.8     104.5
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       184.4     181.3     187.4
kozaiamp        180.0     180.0     180.0