Orbit Fit and Astrometric record for 02GN32

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: 02GN32    
# Created Sun Oct 22 01:37:18 2017
# Orbit generated from Bernstein formalism
# Fitting    8 observations of    8
# Arc:  66.06d
# First observation: 2002/04/06
#  Last observation: 2002/06/11
Preliminary a, adot, b, bdot, g, gdot:
  -0.000001   0.064037   0.000000  -0.006838   0.036436   0.000000
# WARNING MRQMIN stopped after  13 iterations -- oscilliatory solution
# WARNING Fitting with energy constraint
# WARNING MRQMIN stopped after  13 iterations -- oscilliatory solution
# Chi-squared of fit:    21.98 DOF:   11 RMS:  0.29
# Min/Max residuals:    -0.73    0.74
# Exact a, adot, b, bdot, g, gdot:
  1.512944E-05  3.044097E-02 -4.152930E-06 -6.814811E-03  3.083088E-02  9.770366E-03
# Covariance matrix:
  1.3270E-10  2.6645E-07  7.9414E-12 -9.4982E-11  4.4125E-08 -5.3067E-07
  2.6645E-07  5.3735E-04  1.5988E-08 -1.8741E-07  8.8970E-05 -1.0735E-03
  7.9414E-12  1.5988E-08  7.4124E-13 -7.2933E-12  2.6475E-09 -3.1867E-08
 -9.4982E-11 -1.8741E-07 -7.2933E-12  1.1187E-10 -3.1082E-08  3.6353E-07
  4.4125E-08  8.8970E-05  2.6475E-09 -3.1082E-08  1.4731E-05 -1.7770E-04
 -5.3067E-07 -1.0735E-03 -3.1867E-08  3.6353E-07 -1.7770E-04  2.1531E-03
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.595740 -145.389579    0.312244   -0.009959   -0.953081  2452370.692273
# Heliocentric elements and errors
Epoch:              2452370.5000  =  2002/04/06
Mean Anomaly:           82.95875 +/-    52.605
Argument of Peri:       66.34418 +/-    57.348
Long of Asc Node:       31.48030 +/-     1.985
Inclination:            12.61600 +/-     9.097
Eccentricity:         0.29665648 +/-    1.4852
Semi-Major Axis:     31.79449943 +/-    1.8724
Time of Perihelion: 2437280.6094 +/-    9475.3
Perihelion:          22.36245499 +/-   47.2384
Aphelion:            41.22654387 +/-   47.2824
Period (y)              179.2818 +/-     15.84
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -27.65444722 +/-    3.3232
Ecliptic Y          -18.70115428 +/-    2.2931
Ecliptic Z           -0.33738840 +/-    0.0420
Ecliptic XDOT         0.00081818 +/-    0.0045
Ecliptic YDOT        -0.00271541 +/-    0.0010
Ecliptic ZDOT        -0.00061394 +/-    0.0001
# Distances at JD0 (AU)
Heliocenter to KBO   33.38585709 +/-    3.0377
Geocenter to KBO     32.43501369 +/-    4.0378
# Hcoef:  6.13

The following table shows the complete astrometric record for 02GN32. 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 (02GN32) followed by the observatory code and reference code for the source of the astrometry.

2002 04  06.19153  14 08 32.39   -13 37 07.9   21.0R 02GN32    807  Cf5154      
2002 04  06.33003  14 08 31.59   -13 37 04.4         02GN32    807  Cf5154      
2002 04  07.25776  14 08 26.32   -13 36 41.0         02GN32    807  Cf5154      
2002 04  10.50229  14 08 07.68   -13 35 18.7   21.1R 02GN32    568  Cf5154      
2002 04  11.40577  14 08 02.44   -13 34 55.3         02GN32    568  Cf5154      
2002 04  11.48705  14 08 01.94   -13 34 53.0         02GN32    568  Cf5154      
2002 06  11.17720  14 02 36.95   -13 10 05.9   21.0R 02GN32    688  Cf7381      
2002 06  11.25426  14 02 36.56   -13 10 04.3         02GN32    688  Cf7381      

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     0.10       0.00     0.14
  2   0.0004    -12.16     0.04      -0.63     0.15
  3   0.0029    -92.38    -0.19      -4.49     0.18
  4   0.0118   -375.98     0.09     -18.61    -0.16
  5   0.0143   -455.80     0.15     -22.36    -0.22
  6   0.0145   -463.43    -0.15     -22.65    -0.13
  7   0.1807  -5430.39     0.74    -236.32     0.11
  8   0.1809  -5436.30    -0.73    -236.77    -0.08

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.

02GN32    quality flag:0

Type:      ERR2LARGE ERR2LARGE ERR2LARGE

axisobj         0.000     0.000     0.000
ecceobj        -1.000    -1.000    -1.000
incobj         -1.000    -1.000    -1.000
qmin            0.000     0.000     0.000
qmax            0.000     0.000     0.000
amean           0.000     0.000     0.000
amin            0.000     0.000     0.000
amax            0.000     0.000     0.000
emean           0.000     0.000     0.000
emin            0.000     0.000     0.000
emax            0.000     0.000     0.000
imean           0.000     0.000     0.000
imin            0.000     0.000     0.000
imax            0.000     0.000     0.000
excite_mean     0.000     0.000     0.000
fracstop        0.000     0.000     0.000
cjmean          0.000     0.000     0.000

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         0.0       0.0       0.0
kozaiamp          0.0       0.0       0.0