Orbit Fit and Astrometric record for 02GW32

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: 02GW32    
# Created Sun Oct 22 01:37:19 2017
# Orbit generated from Bernstein formalism
# Fitting   18 observations of   18
# Arc:  14.14y
# First observation: 2002/04/08
#  Last observation: 2016/05/29
Preliminary a, adot, b, bdot, g, gdot:
  -0.001645   0.028104  -0.000096   0.001907   0.026600   0.000000
# Chi-squared of fit:    44.45 DOF:   30 RMS:  0.28
# Min/Max residuals:    -0.77    0.48
# Exact a, adot, b, bdot, g, gdot:
  1.416573E-05  2.681534E-02  1.750532E-06  1.825109E-03  2.724445E-02  1.512312E-04
# Covariance matrix:
  3.2630E-13 -6.8489E-14 -2.3485E-15 -3.5604E-15  2.0625E-13 -1.5397E-13
 -6.8489E-14  5.9479E-14 -3.4086E-15  3.9746E-15 -5.2022E-15  1.4918E-13
 -2.3485E-15 -3.4086E-15  1.1692E-13 -1.2063E-14 -7.3848E-15 -9.0853E-15
 -3.5604E-15  3.9746E-15 -1.2063E-14  4.2075E-15  2.8243E-16  1.0666E-14
  2.0625E-13 -5.2022E-15 -7.3848E-15  2.8243E-16  2.6618E-13 -1.6287E-14
 -1.5397E-13  1.4918E-13 -9.0853E-15  1.0666E-14 -1.6287E-14  4.0059E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   -5.197725 -135.425835    0.439362   -0.081820   -0.898780  2452372.875343
# Heliocentric elements and errors
Epoch:              2452370.5000  =  2002/04/06
Mean Anomaly:          182.72824 +/-     0.024
Argument of Peri:      124.79779 +/-     0.016
Long of Asc Node:      276.57073 +/-     0.001
Inclination:             6.37032 +/-     0.000
Eccentricity:         0.07630724 +/-    0.0001
Semi-Major Axis:     34.93841480 +/-    0.0024
Time of Perihelion: 2489514.6374 +/-       3.3
Perihelion:          32.27236064 +/-    0.0030
Aphelion:            37.60446896 +/-    0.0033
Period (y)              206.5204 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -26.98899249 +/-    0.0005
Ecliptic Y          -25.96990680 +/-    0.0005
Ecliptic Z           -3.32512879 +/-    0.0001
Ecliptic XDOT         0.00186027 +/-    0.0000
Ecliptic YDOT        -0.00194324 +/-    0.0000
Ecliptic ZDOT         0.00018150 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.60183847 +/-    0.0005
Geocenter to KBO     36.70472166 +/-    0.0007
# Hcoef:  7.26

The following table shows the complete astrometric record for 02GW32. 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 (02GW32) followed by the observatory code and reference code for the source of the astrometry.

2002 04  08.37460  14 41 52.58   -21 10 13.3   21.6R 02GW32    807  Cf5154      
2002 04  09.23285  14 41 48.38   -21 09 57.2         02GW32    807  Cf5154      
2002 04  09.29632  14 41 48.07   -21 09 56.1         02GW32    807  Cf5154      
2002 07  09.98535  14 35 05.35   -20 33 49.1   22.0R 02GW32    304  Cf9900      
2002 07  10.13104  14 35 05.12   -20 33 46.8         02GW32    304  Cf9900      
2002 08  09.04278  14 35 06.77   -20 29 10.7   22.5R 02GW32    807  Cg3254      
2002 08  10.04134  14 35 08.48   -20 29 09.3         02GW32    807  Cg3254      
2002 08  11.04517  14 35 10.26   -20 29 08.0         02GW32    807  Cg3254      
2002 08  12.04023  14 35 12.11   -20 29 07.3         02GW32    807  Cg3254      
2003 04  29.46923  14 46 29.10   -21 24 25.4   23.2R 02GW32    568  Ci0084      
2003 04  29.50998  14 46 28.89   -21 24 24.6         02GW32    568  Ci0084      
2003 04  30.53881  14 46 23.21   -21 23 59.6         02GW32    568  Ci0084      
2006 04  22.28204  15 06 39.31   -22 26 57.5   23.0R 02GW32    304  Cr0782      
2006 04  22.33117  15 06 39.05   -22 26 56.8         02GW32    304  Cr0782      
2006 06  21.15925  15 01 32.30   -22 03 52.1   23.5R 02GW32    304  Cr4819      
2006 06  21.21560  15 01 32.08   -22 03 51.1         02GW32    304  Cr4819      
2016 05  29.32908  16 10 19.031  -24 31 42.52  23.0R 02GW32    G37              
2016 05  29.37929  16 10 18.724  -24 31 41.67        02GW32    G37              

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     0.29       0.00    -0.14
  2   0.0023    -60.86     0.27      -2.52    -0.20
  3   0.0025    -65.33     0.42      -2.79    -0.26
  4   0.2536  -6105.08     0.04     314.29    -0.06
  5   0.2540  -6108.87     0.08     315.46    -0.09
  6   0.3358  -6173.59    -0.15     585.00     0.13
  7   0.3386  -6151.20     0.36     593.88    -0.15
  8   0.3413  -6127.84     0.15     602.96    -0.24
  9   0.3441  -6103.35    -0.28     611.79    -0.51
 10   1.0571   3942.71    -0.56     348.22     0.38
 11   1.0572   3939.67    -0.28     348.12     0.28
 12   1.0600   3856.47    -0.77     348.43     0.48
 13   4.0381  21231.34     0.10    1489.41     0.26
 14   4.0382  21227.64     0.22    1489.13     0.02
 15   4.2020  16715.53     0.02    1674.30     0.27
 16   4.2022  16712.30     0.10    1674.42     0.02
 17  14.1409  77439.87     0.08    5558.99    -0.10
 18  14.1410  77435.00    -0.09    5559.16    -0.12

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.

02GW32    quality flag:3

Type:           5:4E      5:4E      5:4E

axisobj        34.838    34.845    34.831
ecceobj         0.079     0.079     0.080
incobj          6.363     6.363     6.363
qmin           31.840    31.839    31.789
qmax           38.435    38.399    38.415
amean          34.946    34.946    34.946
amin           34.586    34.587    34.597
amax           35.328    35.323    35.317
emean           0.066     0.065     0.066
emin            0.044     0.043     0.044
emax            0.089     0.088     0.089
imean           7.735     7.726     7.782
imin            6.430     6.463     6.349
imax            8.891     8.870     8.923
excite_mean     0.150     0.150     0.151
fracstop        1.000     1.000     1.000
cjmean          2.992     2.992     2.992

libcent 0       179.8     181.2     181.0
libamp  0        98.3      99.7      91.3
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       179.8     180.1     180.2
kozaiamp        180.0     180.0     180.0