Orbit Fit and Astrometric record for 168700

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: 168700    
# Created Sun Oct 22 01:36:37 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   21 observations of   21
# Arc:   7.36y
# First observation: 2000/03/03
#  Last observation: 2007/07/12
# Chi-squared of fit:    51.37 DOF:   36 RMS:  0.28
# Min/Max residuals:    -0.57    0.50
# Exact a, adot, b, bdot, g, gdot:
  1.829813E-05  4.279654E-02  1.584257E-06  2.750021E-03  3.389026E-02 -3.668558E-04
# Covariance matrix:
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.403282 -162.741067    0.554234    0.048975   -0.827453  2451606.975976
# Heliocentric elements and errors
Epoch:              2451606.5000  =  2000/03/03
Mean Anomaly:          355.02967 +/-     0.000
Argument of Peri:       49.59730 +/-     0.000
Long of Asc Node:      154.78675 +/-     0.000
Inclination:             4.99698 +/-     0.000
Eccentricity:         0.22586996 +/-    0.0000
Semi-Major Axis:     39.11078149 +/-    0.0000
Time of Perihelion: 2452839.9633 +/-       0.0
Perihelion:          30.27683090 +/-    0.0000
Aphelion:            47.94473208 +/-    0.0000
Period (y)              244.5980 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -29.07778280 +/-    0.0000
Ecliptic Y           -8.45293060 +/-    0.0000
Ecliptic Z            1.75172007 +/-    0.0000
Ecliptic XDOT         0.00106071 +/-    0.0000
Ecliptic YDOT        -0.00328206 +/-    0.0000
Ecliptic ZDOT         0.00022012 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   30.33214355 +/-    0.0000
Geocenter to KBO     29.50703079 +/-    0.0000
# Hcoef:  8.23

The following table shows the complete astrometric record for 168700. 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 (168700) followed by the observatory code and reference code for the source of the astrometry.

2000 03  03.475233 13 08 51.28   -03 37 54.3         168700    645  C~1SGa      
2000 03  03.476062 13 08 51.28   -03 37 54.3         168700    645  C~1SGa      
2000 03  03.478550 13 08 51.26   -03 37 54.2         168700    645  C~1SGa      
2000 04  02.52104  13 06 09.84   -03 19 08.0   23.0R 168700    568  Cb4443      
2000 04  02.55109  13 06 09.63   -03 19 06.7   22.7R 168700    568  Cb4443      
2000 04  07.54897  13 05 40.08   -03 15 54.0   23.1R 168700    568  Cb4443      
2000 04  07.58752  13 05 39.85   -03 15 52.4   23.2R 168700    568  Cb4443      
2000 05  07.37446  13 02 54.01   -02 58 53.6   22.9R 168700    568  Cb5789      
2000 05  07.41719  13 02 53.78   -02 58 52.8   23.1R 168700    568  Cb5789      
2000 05  30.37669  13 01 22.33   -02 50 40.5   23.1R 168700    568  Cb6999      
2000 05  30.41147  13 01 22.23   -02 50 40.2   23.2R 168700    568  Cb6999      
2001 02  17.15273  13 19 04.03   -04 32 01.7   22.5R 168700    950  Cc6646      
2001 02  17.19078  13 19 03.92   -04 32 00.7   22.4R 168700    950  Cc6646      
2001 02  19.14697  13 18 57.98   -04 31 09.4         168700    950  Cc6646      
2002 02  04.63343  13 28 46.83   -05 22 38.1   22.4R 168700    568  Cf1719      
2002 02  05.63624  13 28 45.58   -05 22 21.8         168700    568  Cf1719      
2006 05  25.207429 13 57 57.56   -07 29 08.3   22.7V 168700    645  C~1SGa      
2006 05  25.208258 13 57 57.56   -07 29 08.3   21.7V 168700    645  C~1SGa      
2006 05  25.210746 13 57 57.55   -07 29 08.3   23.4V 168700    645  C~1SGa      
2007 07  11.98685  14 05 11.27   -08 05 55.8         168700    304  Cv1966      
2007 07  12.14534  14 05 11.21   -08 05 56.7         168700    304  Cv1967      

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    -0.01       0.00    -0.26
  2   0.0000      0.00     0.40       0.00    -0.24
  3   0.0000      0.00     0.28       0.00    -0.23
  4   0.0823      0.00    -0.13       0.00     0.22
  5   0.0823      0.00    -0.57       0.00     0.36
  6   0.0960      0.00    -0.34       0.00     0.17
  7   0.0961      0.00    -0.32       0.00     0.29
  8   0.1777      0.00     0.04       0.00     0.14
  9   0.1778      0.00    -0.20       0.00    -0.27
 10   0.2407      0.00     0.41       0.00    -0.14
 11   0.2408      0.00     0.50       0.00    -0.33
 12   0.9601      0.00     0.32       0.00     0.15
 13   0.9602      0.00     0.40       0.00     0.17
 14   0.9656      0.00     0.44       0.00     0.14
 15   1.9251      0.00    -0.35       0.00    -0.25
 16   1.9279      0.00    -0.44       0.00    -0.44
 17   6.2251      0.00    -0.00       0.00    -0.06
 18   6.2251      0.00     0.06       0.00    -0.08
 19   6.2251      0.00     0.09       0.00    -0.13
 20   7.3553      0.00     0.06       0.00     0.11
 21   7.3557      0.00     0.01       0.00     0.21

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.

168700    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.100    39.100    39.100
ecceobj         0.226     0.226     0.226
incobj          4.998     4.998     4.998
qmin           29.591    29.591    29.591
qmax           49.794    49.794    49.794
amean          39.455    39.455    39.455
amin           39.066    39.066    39.066
amax           39.921    39.921    39.921
emean           0.221     0.221     0.221
emin            0.196     0.196     0.196
emax            0.248     0.248     0.248
imean           5.530     5.530     5.530
imin            3.649     3.649     3.649
imax            6.888     6.889     6.888
excite_mean     0.242     0.242     0.242
fracstop        1.000     1.000     1.000
cjmean          2.985     2.985     2.985

libcent 0       181.4     181.3     181.4
libamp  0        49.7      49.7      49.7
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       204.1     204.1     204.0
kozaiamp        180.0     180.0     180.0