Orbit Fit and Astrometric record for 131697

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: 131697    
# Created Sun Dec 21 02:37:22 2014
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   21 observations of   21
# Arc:  11.25y
# First observation: 2001/12/11
#  Last observation: 2013/03/13
# Chi-squared of fit:    20.77 DOF:   36 RMS:  0.18
# Min/Max residuals:    -0.36    0.52
# Exact a, adot, b, bdot, g, gdot:
  1.686441E-05  3.262625E-02  6.303191E-07 -1.318433E-03  3.005712E-02 -1.890459E-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
    1.744763  107.397087    0.459128    0.026246   -0.864158  2452254.897773
# Heliocentric elements and errors
Epoch:              2452254.5000  =  2001/12/11
Mean Anomaly:          296.91098 +/-     0.000
Argument of Peri:      214.55178 +/-     0.000
Long of Asc Node:      323.23526 +/-     0.000
Inclination:             2.84918 +/-     0.000
Eccentricity:         0.07622883 +/-    0.0000
Semi-Major Axis:     35.18531201 +/-    0.0000
Time of Perihelion: 2465614.0493 +/-       0.0
Perihelion:          32.50317673 +/-    0.0000
Aphelion:            37.86744728 +/-    0.0000
Period (y)              208.7134 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -9.76204623 +/-    0.0000
Ecliptic Y           32.70105504 +/-    0.0000
Ecliptic Z            1.01298792 +/-    0.0000
Ecliptic XDOT        -0.00279414 +/-    0.0000
Ecliptic YDOT        -0.00104937 +/-    0.0000
Ecliptic ZDOT        -0.00012507 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.14213578 +/-    0.0000
Geocenter to KBO     33.27004180 +/-    0.0000
# Hcoef:  8.31

The following table shows the complete astrometric record for 131697. 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 (131697) followed by the observatory code and reference code for the source of the astrometry.

2001 12  11.39703  07 16 24.21   +24 02 16.2         131697    568  Ce7056      
2001 12  11.42052  07 16 24.07   +24 02 16.6         131697    568  Ce7056      
2001 12  11.44368  07 16 23.95   +24 02 16.9         131697    568  Ce7056      
2002 01  09.51211  07 13 22.22   +24 07 36.8         131697    568  Ce7056      
2002 01  09.53762  07 13 22.01   +24 07 37.0   23.5R 131697    568  Ce7056      
2003 12  24.46344  07 31 22.81   +23 23 23.4   23.1g 131697    568  Cq9107      
2003 12  24.48664  07 31 22.68   +23 23 23.7   23.3g 131697    568  Cq9107      
2003 12  24.50988  07 31 22.52   +23 23 24.1   23.6g 131697    568  Cq9107      
2003 12  25.50403  07 31 16.47   +23 23 37.5   24.0g 131697    568  Cq9107      
2004 04  15.19439  07 24 13.91   +23 33 49.8         131697    675  Cq9107      
2004 04  15.23969  07 24 14.00   +23 33 49.3         131697    675  Cq9107      
2005 01  08.35280  07 37 50.14   +23 04 04.1   23.5r 131697    568  Cq9107      
2005 01  08.39064  07 37 49.89   +23 04 04.6   23.6r 131697    568  Cq9107      
2005 01  08.42845  07 37 49.64   +23 04 05.2   23.4r 131697    568  Cq9107      
2005 01  15.37575  07 37 04.49   +23 05 43.4   23.9r 131697    568  Cq9107      
2006 01  29.32339  07 43 42.64   +22 44 45.3         131697    675  Cq9107      
2006 01  29.32971  07 43 42.61   +22 44 45.2         131697    675  Cq9107      
2006 01  29.42638  07 43 42.00   +22 44 46.6         131697    675  Cq9107      
2006 01  29.43285  07 43 41.98   +22 44 46.6         131697    675  Cq9107      
2013 03  13.12101  08 35 54.79   +19 25 56.6   22.6R 131697    695  C~0und      
2013 03  13.19879  08 35 54.46   +19 25 57.8         131697    695  C~0und      

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    -0.17       0.00     0.52
  2   0.0001      0.00     0.00       0.00    -0.15
  3   0.0001      0.00     0.18       0.00    -0.11
  4   0.0797      0.00     0.25       0.00     0.02
  5   0.0798      0.00    -0.36       0.00    -0.04
  6   2.0344      0.00    -0.15       0.00    -0.10
  7   2.0345      0.00     0.06       0.00    -0.11
  8   2.0345      0.00    -0.18       0.00    -0.02
  9   2.0373      0.00     0.20       0.00     0.16
 10   2.3430      0.00     0.01       0.00     0.05
 11   2.3432      0.00     0.07       0.00    -0.09
 12   3.0772      0.00     0.26       0.00     0.04
 13   3.0773      0.00     0.24       0.00    -0.02
 14   3.0774      0.00     0.23       0.00     0.04
 15   3.0965      0.00     0.13       0.00    -0.05
 16   4.1340      0.00    -0.16       0.00     0.31
 17   4.1340      0.00    -0.01       0.00     0.13
 18   4.1342      0.00    -0.02       0.00     0.23
 19   4.1343      0.00     0.29       0.00     0.15
 20  11.2518      0.00     0.09       0.00    -0.27
 21  11.2520      0.00    -0.09       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.