Orbit Fit and Astrometric record for 02GA32

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: 02GA32    
# Created Mon Dec 18 02:37:11 2017
# Orbit generated from Bernstein formalism
# Fitting   17 observations of   19
# Arc:   6.99y
# First observation: 2001/05/22
#  Last observation: 2008/05/18
Preliminary a, adot, b, bdot, g, gdot:
  -0.001081   0.025878  -0.000313   0.006989   0.024454   0.000000
# Chi-squared of fit:    30.74 DOF:   28 RMS:  0.24
# Min/Max residuals:    -0.75    0.54
# Exact a, adot, b, bdot, g, gdot:
  1.500047E-05  2.430699E-02  3.393640E-06  6.562750E-03  2.453726E-02 -6.961660E-03
# Covariance matrix:
  2.7084E-13 -1.7391E-13  2.4670E-14 -3.8330E-14  6.3466E-14 -7.4540E-13
 -1.7391E-13  2.3739E-13 -3.9613E-14  6.1050E-14  2.8392E-14  1.1859E-12
  2.4670E-14 -3.9613E-14  1.6249E-13 -3.8808E-14 -8.1978E-15 -2.0822E-13
 -3.8330E-14  6.1050E-14 -3.8808E-14  2.7499E-14  1.1452E-14  3.2063E-13
  6.3466E-14  2.8392E-14 -8.1978E-15  1.1452E-14  3.1616E-13  2.1917E-13
 -7.4540E-13  1.1859E-12 -2.0822E-13  3.2063E-13  2.1917E-13  6.2275E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.613725 -117.459188    0.024968   -0.011038   -1.018384  2452051.705673
# Heliocentric elements and errors
Epoch:              2452050.5000  =  2001/05/21
Mean Anomaly:          321.26757 +/-     0.009
Argument of Peri:       68.46418 +/-     0.016
Long of Asc Node:      244.71587 +/-     0.000
Inclination:            15.17650 +/-     0.000
Eccentricity:         0.32504258 +/-    0.0001
Semi-Major Axis:     51.70462176 +/-    0.0068
Time of Perihelion: 2466660.9883 +/-       2.0
Perihelion:          34.89841801 +/-    0.0070
Aphelion:            68.51082552 +/-    0.0104
Period (y)              371.7939 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -19.27920850 +/-    0.0004
Ecliptic Y          -37.04799178 +/-    0.0008
Ecliptic Z           -0.43639401 +/-    0.0000
Ecliptic XDOT         0.00275275 +/-    0.0000
Ecliptic YDOT        -0.00056606 +/-    0.0000
Ecliptic ZDOT         0.00074074 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.76639816 +/-    0.0008
Geocenter to KBO     40.75435317 +/-    0.0009
# Hcoef:  7.22

The following table shows the complete astrometric record for 02GA32. 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 (02GA32) followed by the observatory code and reference code for the source of the astrometry.

2001 05  22.20493  16 01 22.48   -21 16 13.6   22.8R 02GA32    807  Ch1599      
2001 05  22.28507  16 01 22.07   -21 16 12.3         02GA32    807  Ch1599      
2001 08  19.03078  15 56 53.47   -20 57 06.2   21.9R 02GA32    807  Ch1599      
2001 08  20.02800  15 56 54.02   -20 57 02.7         02GA32    807  Ch1599      
2001 08  21.03566  15 56 54.72   -20 57 00.5         02GA32    807  Ch1599      
2002 04  06.27987  16 10 52.90   -21 21 32.1   22.1R 02GA32    807  Cf5154      
2002 04  07.28495  16 10 49.89   -21 21 20.7         02GA32    807  Cf5154      
2002 04  07.38104  16 10 49.59   -21 21 19.7         02GA32    807  Cf5154      
2002 06  17.27585  16 05 27.84   -21 02 40.6   23. R 02GA32    695  Cf8972      
2002 06  17.29976  16 05 27.71   -21 02 39.5         02GA32    695  Cf8972      
2002 06  17.31534  16 05 27.65   -21 02 39.6         02GA32    695  Cf8972      
2002 06  18.28681  16 05 23.22   -21 02 24.9   23.5R 02GA32    695  Cf8972      
2002 06  18.30184  16 05 23.10   -21 02 24.0         02GA32    695  Cf8972      
2004 06  24.36031  16 17 29.26   -20 46 07.1   23.9R 02GA32    568  Ck9821      
2004 06  24.40690  16 17 29.03   -20 46 06.4         02GA32    568  Ck9821      
2008 05  18.88087  16 46 45.58   -20 12 56.2   24.1R 02GA32    250  S~06AU      
2008 05  18.88712  16 46 45.55   -20 12 56.1         02GA32    250  S~06AU      
2008 05  18.89337  16 46 45.52   -20 12 56.0         02GA32    250  S~06AU      
2008 05  18.90032  16 46 45.48   -20 12 55.9         02GA32    250  S~06AU      

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     0.14       0.00     0.17
  2   0.0002     -5.87     0.15       0.15     0.03
  3   0.2432  -3918.32     0.02     370.23    -0.08
  4   0.2459  -3911.49    -0.28     375.22     0.54
  5   0.2487  -3902.34     0.22     379.38     0.27
  6   0.8736   7890.89    -0.04    1197.87    -0.28
  7   0.8763   7847.41    -0.02    1201.42    -0.16
  8   0.8766   7843.10     0.00    1201.64    -0.25
  9   1.0707   3210.18     0.16    1462.47     0.37
 10   1.0708   3208.19 (  -0.23)   1463.20 (   1.01)
 11   1.0708   3207.38 (   0.01)   1462.94 (   0.70)
 12   1.0735   3143.68     0.07    1465.55    -0.47
 13   1.0735   3141.86    -0.75    1466.11     0.04
 14   3.0915  12990.09     0.35    4277.74    -0.19
 15   3.0916  12986.78     0.07    4277.87    -0.21
 16   6.9916  37505.39    -0.03   10046.17     0.04
 17   6.9916  37504.95    -0.01   10046.22     0.06
 18   6.9916  37504.50     0.01   10046.26     0.07
 19   6.9916  37503.91    -0.07   10046.29     0.07

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.

02GA32    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        51.796    51.816    51.775
ecceobj         0.327     0.327     0.327
incobj         15.172    15.172    15.172
qmin           34.313    34.333    34.147
qmax           71.407    71.198    71.443
amean          52.330    52.360    52.221
amin           51.632    51.626    51.582
amax           53.224    53.187    53.189
emean           0.325     0.324     0.325
emin            0.304     0.307     0.306
emax            0.342     0.342     0.345
imean          16.887    16.955    16.809
imin           15.907    16.119    15.981
imax           17.921    17.812    17.698
excite_mean     0.436     0.436     0.435
fracstop        1.000     1.000     1.000
cjmean          2.960     2.960     2.960

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       176.2     185.5     176.1
kozaiamp        180.0     180.0     179.9