Orbit Fit and Astrometric record for 02FW6

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: 02FW6     
# Created Thu Dec 14 02:37:11 2017
# Orbit generated from Bernstein formalism
# Fitting   20 observations of   20
# Arc:  13.09y
# First observation: 2002/03/20
#  Last observation: 2015/04/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000281   0.024830  -0.000070   0.001330   0.027866   0.000000
# Chi-squared of fit:    49.38 DOF:   34 RMS:  0.28
# Min/Max residuals:    -0.65    0.49
# Exact a, adot, b, bdot, g, gdot:
  1.494640E-05  2.361511E-02 -1.150175E-06  1.259637E-03  2.538441E-02 -1.128698E-03
# Covariance matrix:
  2.7384E-13 -2.7410E-14  2.5334E-15 -7.8334E-16  2.3240E-13 -3.8291E-14
 -2.7410E-14  5.3890E-14 -2.1284E-15  2.8281E-15  8.1810E-14  1.5899E-13
  2.5334E-15 -2.1284E-15  1.4973E-13 -1.3154E-14  7.5651E-16 -6.4437E-15
 -7.8334E-16  2.8281E-15 -1.3154E-14  2.2892E-15  4.4747E-15  8.6878E-15
  2.3240E-13  8.1810E-14  7.5651E-16  4.4747E-15  6.7057E-13  2.6374E-13
 -3.8291E-14  1.5899E-13 -6.4437E-15  8.6878E-15  2.6374E-13  4.8868E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.827293 -175.978163    0.071198    0.031626   -0.993750  2452353.929593
# Heliocentric elements and errors
Epoch:              2452350.5000  =  2002/03/17
Mean Anomaly:          205.32223 +/-     0.034
Argument of Peri:      190.09892 +/-     0.022
Long of Asc Node:      153.66581 +/-     0.001
Inclination:             3.53480 +/-     0.000
Eccentricity:         0.11916535 +/-    0.0001
Semi-Major Axis:     36.38674230 +/-    0.0038
Time of Perihelion: 2486796.4825 +/-       5.4
Perihelion:          32.05070328 +/-    0.0042
Aphelion:            40.72278131 +/-    0.0049
Period (y)              219.4942 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -40.27314578 +/-    0.0013
Ecliptic Y           -2.75534081 +/-    0.0001
Ecliptic Z            1.25612682 +/-    0.0000
Ecliptic XDOT         0.00029592 +/-    0.0000
Ecliptic YDOT        -0.00253307 +/-    0.0000
Ecliptic ZDOT         0.00013213 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.38682989 +/-    0.0013
Geocenter to KBO     39.39425576 +/-    0.0013
# Hcoef:  7.84

The following table shows the complete astrometric record for 02FW6. 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 (02FW6) followed by the observatory code and reference code for the source of the astrometry.

2002 03  20.42885  12 17 39.88   +00 04 42.8   23.7R 02FW6     568  Cf5861      
2002 03  20.49199  12 17 39.58   +00 04 44.6   24.1R 02FW6     568  Cf5861      
2002 03  20.53396  12 17 39.38   +00 04 45.7   23.8R 02FW6     568  Cf5861      
2002 03  22.47601  12 17 30.30   +00 05 46.9         02FW6     568  Cf5861      
2002 03  22.51609  12 17 30.10   +00 05 48.1         02FW6     568  Cf5861      
2002 06  03.19792  12 13 16.92   +00 32 12.5         02FW6     675  Cf8969      
2002 06  08.18611  12 13 12.25   +00 32 32.7         02FW6     675  Cf8969      
2002 06  08.26042  12 13 12.19   +00 32 32.9         02FW6     675  Cf8969      
2006 04  26.07273  12 35 21.30   -01 30 54.1   22.3R 02FW6     807  Cr3565      
2006 04  26.15609  12 35 20.95   -01 30 51.7         02FW6     807  Cr3565      
2006 04  27.09725  12 35 17.07   -01 30 28.3         02FW6     807  Cr3565      
2007 05  08.13557  12 39 43.41   -01 54 37.0   23.6R 02FW6     304  Cu8842      
2007 05  08.18408  12 39 43.24   -01 54 36.0         02FW6     304  Cu8842      
2015 03  23.32657  13 25 03.83   -06 02 53.5   23.3R 02FW6     695  C~1Q3C      
2015 03  23.39024  13 25 03.55   -06 02 51.6         02FW6     695  C~1Q3C      
2015 03  23.45279  13 25 03.26   -06 02 49.8         02FW6     695  C~1Q3C      
2015 04  18.28021  13 23 01.16   -05 50 08.8         02FW6     W84  C~1Tia      
2015 04  19.27164  13 22 56.42   -05 49 40.1   24.1V 02FW6     W84  C~1Tia      
2015 04  21.27595  13 22 46.85   -05 48 42.8         02FW6     W84  C~1Tia      
2015 04  22.27234  13 22 42.09   -05 48 14.3         02FW6     W84  C~1Tia      

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     0.40
  2   0.0002     -4.84     0.03      -0.13     0.24
  3   0.0003     -8.04     0.10      -0.31     0.04
  4   0.0056   -157.34    -0.06       1.82     0.34
  5   0.0057   -160.57    -0.16       1.73     0.24
  6   0.2047  -4275.74    -0.25     -50.68    -0.65
  7   0.2184  -4348.08     0.13     -59.92    -0.42
  8   0.2186  -4348.99     0.10     -60.10    -0.43
  9   4.1003  16927.34     0.41    1048.10     0.03
 10   4.1006  16921.53     0.34    1048.23     0.28
 11   4.1031  16858.42     0.49    1046.66    -0.37
 12   5.1327  21135.31    -0.65    1298.37     0.20
 13   5.1328  21132.55    -0.49    1298.28     0.21
 14  13.0072  66525.47    -0.12    3568.74     0.00
 15  13.0074  66520.41    -0.02    3568.89     0.12
 16  13.0076  66515.24    -0.12    3568.89     0.08
 17  13.0783  64342.09    -0.20    3568.78    -0.21
 18  13.0810  64258.33     0.06    3567.92    -0.03
 19  13.0865  64089.54     0.39    3565.55    -0.08
 20  13.0892  64005.61     0.07    3564.36     0.00

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.

02FW6    quality flag:3

Type:           4:3E      4:3E      4:3E

axisobj        36.199    36.210    36.188
ecceobj         0.125     0.125     0.125
incobj          3.543     3.543     3.543
qmin           31.188    31.176    31.104
qmax           42.071    42.129    42.208
amean          36.478    36.478    36.478
amin           36.124    36.143    36.105
amax           36.861    36.859    36.860
emean           0.122     0.121     0.123
emin            0.101     0.102     0.102
emax            0.143     0.144     0.146
imean           5.702     5.789     5.605
imin            2.403     2.420     2.384
imax           10.488    10.432    10.464
excite_mean     0.161     0.162     0.161
fracstop        1.000     1.000     1.000
cjmean          2.997     2.997     2.998

libcent 0       180.2     179.8     180.8
libamp  0        71.5      66.2      78.4
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       176.9     178.2     176.7
kozaiamp        179.9     180.0     179.9