Orbit Fit and Astrometric record for 129746

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: 129746    
# Created Tue Dec 19 02:36:33 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   15 observations of   15
# Arc:   7.03y
# First observation: 1999/02/10
#  Last observation: 2006/02/22
# Chi-squared of fit:    61.92 DOF:   24 RMS:  0.36
# Min/Max residuals:    -0.72    1.24
# Exact a, adot, b, bdot, g, gdot:
  2.109386E-05  4.401147E-02 -1.728253E-06  1.130443E-03  3.450997E-02 -4.585242E-03
# 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
    0.026704  173.614550    0.526879    0.000165   -0.842008  2451219.964943
# Heliocentric elements and errors
Epoch:              2451220.5000  =  1999/02/11
Mean Anomaly:          340.32012 +/-     0.000
Argument of Peri:       35.16356 +/-     0.000
Long of Asc Node:      171.59910 +/-     0.000
Inclination:             1.47857 +/-     0.000
Eccentricity:         0.26369195 +/-    0.0000
Semi-Major Axis:     39.03545648 +/-    0.0000
Time of Perihelion: 2456090.2561 +/-       0.0
Perihelion:          28.74212083 +/-    0.0000
Aphelion:            49.32879214 +/-    0.0000
Period (y)              243.8917 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -29.56732551 +/-    0.0000
Ecliptic Y            3.83945406 +/-    0.0000
Ecliptic Z            0.01346040 +/-    0.0000
Ecliptic XDOT        -0.00002846 +/-    0.0000
Ecliptic YDOT        -0.00350144 +/-    0.0000
Ecliptic ZDOT         0.00008952 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   29.81564230 +/-    0.0000
Geocenter to KBO     28.97722240 +/-    0.0000
# Hcoef:  8.50

The following table shows the complete astrometric record for 129746. 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 (129746) followed by the observatory code and reference code for the source of the astrometry.

1999 02  10.46420  11 36 35.57   +02 33 36.3   22.8R 129746    568  Ca4178      
1999 02  10.50521  11 36 35.37   +02 33 37.5   22.8R 129746    568  Ca4178      
1999 02  17.64468  11 35 58.98   +02 37 37.3   22.8R 129746    568  Ca4178      
1999 02  17.65455  11 35 58.90   +02 37 37.8   22.8R 129746    568  Ca4178      
1999 04  09.46694  11 31 04.73   +03 09 48.4   23.3R 129746    568  Ca4506      
1999 04  09.49624  11 31 04.58   +03 09 48.9   23.3R 129746    568  Ca4506      
2000 04  07.49139  11 40 35.79   +02 12 38.6   23.2R 129746    568  Cc9919      
2000 04  07.52297  11 40 35.60   +02 12 39.6   23.2R 129746    568  Cc9919      
2001 03  25.28358  11 51 24.81   +01 06 41.2   23.8R 129746    695  Cc9919      
2001 03  25.40672  11 51 24.05   +01 06 45.9         129746    695  Cc9919      
2006 01  31.477353 12 44 28.91   -04 15 34.5   22.4V 129746    645  C~1SXY      
2006 01  31.478182 12 44 28.91   -04 15 34.5   22.5V 129746    645  C~1SXY      
2006 01  31.480670 12 44 28.90   -04 15 34.4   23.1V 129746    645  C~1SXY      
2006 02  22.36426  12 43 15.60   -04 07 14.9   22.8R 129746    304  Cq6892      
2006 02  22.37854  12 43 15.52   -04 07 14.3         129746    304  Cq6892      

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    -0.19       0.00     1.24
  2   0.0001      0.00     0.12       0.00     0.36
  3   0.0197      0.00     0.48       0.00     0.05
  4   0.0197      0.00     0.08       0.00     0.20
  5   0.1588      0.00    -0.09       0.00    -0.09
  6   0.1589      0.00    -0.01       0.00    -0.60
  7   1.1554      0.00    -0.09       0.00    -0.59
  8   1.1555      0.00    -0.32       0.00    -0.72
  9   2.1186      0.00     0.28       0.00     0.40
 10   2.1189      0.00     0.18       0.00     0.20
 11   6.9733      0.00     0.14       0.00    -0.00
 12   6.9733      0.00     0.17       0.00    -0.02
 13   6.9734      0.00     0.10       0.00     0.05
 14   7.0333      0.00    -0.02       0.00    -0.12
 15   7.0333      0.00    -0.24       0.00     0.05

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.

129746    quality flag:3

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

axisobj        39.092    39.092    39.092
ecceobj         0.264     0.264     0.264
incobj          1.479     1.479     1.479
qmin           28.087    28.093    28.088
qmax           51.637    51.629    51.514
amean          39.455    39.455    39.455
amin           38.980    38.974    38.974
amax           40.053    40.061    40.036
emean           0.273     0.273     0.273
emin            0.259     0.259     0.259
emax            0.289     0.289     0.287
imean           1.806     1.807     1.806
imin            1.389     1.390     1.391
imax            2.203     2.203     2.203
excite_mean     0.275     0.275     0.275
fracstop        1.000     1.000     1.000
cjmean          2.964     2.964     2.964

libcent 0       180.5     179.2     179.8
libamp  0        89.4      89.6      89.6
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       136.3     135.5     135.8
kozaiamp        179.8     180.0     179.7