Orbit Fit and Astrometric record for 02GD32

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: 02GD32    
# Created Sat Aug 30 01:37:41 2014
# Orbit generated from Bernstein formalism
# Fitting   24 observations of   25
# Arc:   6.05y
# First observation: 2002/04/07
#  Last observation: 2008/04/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.000025   0.016679   0.000001  -0.001910   0.020162   0.000000
# Chi-squared of fit:    53.23 DOF:   42 RMS:  0.26
# Min/Max residuals:    -0.83    0.40
# Exact a, adot, b, bdot, g, gdot:
  1.287437E-05  1.669649E-02 -2.049449E-06 -1.911662E-03  2.031513E-02  8.797973E-04
# Covariance matrix:
  1.7781E-13 -1.2643E-13 -4.4918E-15  1.2405E-14  1.4015E-13 -1.0956E-12
 -1.2643E-13  2.5489E-13  1.0014E-14 -2.9058E-14 -6.6809E-14  2.5765E-12
 -4.4918E-15  1.0014E-14  9.4167E-14 -2.1380E-14 -3.0582E-15  1.0640E-13
  1.2405E-14 -2.9058E-14 -2.1380E-14  1.6102E-14  7.0133E-15 -3.0933E-13
  1.4015E-13 -6.6809E-14 -3.0582E-15  7.0133E-15  3.4641E-13 -6.0888E-13
 -1.0956E-12  2.5765E-12  1.0640E-13 -3.0933E-13 -6.0888E-13  2.7431E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.836625 -150.460483    0.210415   -0.014371   -0.980921  2452371.672563
# Heliocentric elements and errors
Epoch:              2452370.5000  =  2002/04/06
Mean Anomaly:          155.48171 +/-     0.122
Argument of Peri:       25.99137 +/-     0.116
Long of Asc Node:       22.16956 +/-     0.001
Inclination:             6.58563 +/-     0.000
Eccentricity:         0.13904238 +/-    0.0001
Semi-Major Axis:     44.45475595 +/-    0.0059
Time of Perihelion: 2405612.8594 +/-      35.5
Perihelion:          38.27366073 +/-    0.0060
Aphelion:            50.63585118 +/-    0.0074
Period (y)              296.4050 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -43.77765587 +/-    0.0012
Ecliptic Y          -24.56185394 +/-    0.0007
Ecliptic Z           -0.71885751 +/-    0.0000
Ecliptic XDOT         0.00100115 +/-    0.0000
Ecliptic YDOT        -0.00201565 +/-    0.0000
Ecliptic ZDOT        -0.00025912 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   50.20243598 +/-    0.0011
Geocenter to KBO     49.22440195 +/-    0.0014
# Hcoef:  5.95

The following table shows the complete astrometric record for 02GD32. 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 (02GD32) followed by the observatory code and reference code for the source of the astrometry.

2002 04  07.17182  13 48 40.55   -12 05 32.7   21.4R 02GD32    807  Cf5154      
2002 04  07.23610  13 48 40.31   -12 05 31.6         02GD32    807  Cf5154      
2002 04  08.20735  13 48 36.51   -12 05 11.5         02GD32    807  Cf5154      
2002 04  08.97994  13 48 33.52   -12 04 55.6         02GD32    246  C~05Ct      
2002 04  11.30825  13 48 24.30   -12 04 08.3   21.8R 02GD32    695  Cg5851      
2002 04  11.39157  13 48 23.95   -12 04 06.4         02GD32    695  Cg5851      
2002 04  11.39375  13 48 23.96   -12 04 06.3   21.8R 02GD32    568  Cf5154      
2002 04  11.47633  13 48 23.63   -12 04 04.7         02GD32    568  Cf5154      
2002 06  03.24289  13 45 12.94   -11 47 05.0         02GD32    675  Cf8972      
2002 06  03.25451  13 45 12.92   -11 47 04.7   23.3R 02GD32    675  Cf8972      
2002 06  03.31614  13 45 12.76   -11 47 03.7   23.6R 02GD32    675  Cf8972      
2002 06  16.15825  13 44 43.16   -11 44 21.5   22.9R 02GD32    695  Cf8972      
2002 06  17.15531  13 44 41.26   -11 44 10.9   22.3R 02GD32    695  Cf8972      
2002 06  17.21782  13 44 41.14   -11 44 10.2   22.6R 02GD32    695  Cf8972      
2003 03  07.49840  13 53 55.58   -12 40 33.4   22.9R 02GD32    662  Ch8264      
2003 03  07.53733  13 53 55.47   -12 40 33.0         02GD32    662  Ch8264      
2003 04  29.27157  13 50 43.83   -12 24 22.2   22.8R 02GD32    688  Ch8264      
2003 04  29.34890  13 50 43.49   -12 24 20.5         02GD32    688  Ch8264      
2005 04  10.36854  13 58 59.76   -13 22 54.4   22.3R 02GD32    695  Cn3092      
2005 04  11.33662  13 58 55.97   -13 22 35.4         02GD32    695  Cn3092      
2005 04  11.42230  13 58 55.62   -13 22 34.1         02GD32    695  Cn3092      
2008 04  23.30657  14 08 44.96   -14 35 18.7   23.8R 02GD32    250  S~06AU      
2008 04  23.31282  14 08 44.93   -14 35 18.5         02GD32    250  S~06AU      
2008 04  23.36768  14 08 44.71   -14 35 17.5         02GD32    250  S~06AU      
2008 04  23.37393  14 08 44.69   -14 35 17.3         02GD32    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     0.03       0.00     0.12
  2   0.0002     -3.68     0.30      -0.22     0.01
  3   0.0028    -62.92     0.09      -1.15     0.34
  4   0.0050   -109.57 (   0.54)     -1.80 (   0.89)
  5   0.0113   -252.79     0.24      -5.45     0.16
  6   0.0116   -258.27    -0.02      -5.49     0.25
  7   0.0116   -258.17     0.11      -5.35     0.33
  8   0.0118   -263.26     0.19      -5.57     0.25
  9   0.1563  -3241.82    -0.26     -47.42    -0.16
 10   0.1563  -3242.20    -0.14     -47.25     0.02
 11   0.1565  -3244.75    -0.05     -47.15     0.15
 12   0.1916  -3708.82     0.40     -50.85     0.07
 13   0.1943  -3738.68    -0.08     -50.92     0.21
 14   0.1945  -3740.58    -0.11     -50.89     0.26
 15   0.9153   5060.41    -0.30    -343.59    -0.31
 16   0.9154   5058.77    -0.30    -343.78    -0.41
 17   1.0598   2089.57     0.03    -418.81    -0.28
 18   1.0600   2084.31    -0.41    -418.97    -0.35
 19   3.0094  10118.33    -0.14   -1185.21    -0.47
 20   3.0121  10059.72     0.17   -1186.43    -0.43
 21   3.0123  10054.47     0.21   -1186.97    -0.83
 22   6.0455  19657.19     0.04   -2382.52     0.24
 23   6.0456  19656.71    -0.05   -2382.47     0.29
 24   6.0457  19653.34     0.00   -2382.60     0.22
 25   6.0457  19652.99     0.05   -2382.51     0.31

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.

02GD32    quality flag:3

Type:        9:5EEEE   9:5EEEE   9:5EEEE

axisobj        44.256    44.256    44.255
ecceobj         0.143     0.143     0.143
incobj          6.609     6.609     6.609
qmin           37.810    37.810    37.810
qmax           51.676    51.676    51.666
amean          44.555    44.555    44.555
amin           44.155    44.156    44.155
amax           45.010    45.010    45.010
emean           0.136     0.136     0.136
emin            0.122     0.122     0.122
emax            0.149     0.149     0.149
imean           6.205     6.204     6.205
imin            5.405     5.405     5.405
imax            6.990     6.990     6.991
excite_mean     0.174     0.174     0.174
fracstop        1.000     1.000     1.000
cjmean          3.071     3.071     3.071

libcent 0       178.5     179.1     179.3
libamp  0       101.8     102.3     102.5
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       183.6     183.8     183.5
kozaiamp        180.0     180.0     180.0