Orbit Fit and Astrometric record for 131318

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: 131318    
# Created Sun Oct 22 01:36:31 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   33 observations of   33
# Arc:  14.08y
# First observation: 2001/03/22
#  Last observation: 2015/04/22
# Chi-squared of fit:   152.62 DOF:   60 RMS:  0.38
# Min/Max residuals:    -1.00    1.20
# Exact a, adot, b, bdot, g, gdot:
  1.924818E-05  3.674885E-02 -5.113869E-06 -8.957353E-03  3.169912E-02  8.226398E-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
    0.066411 -178.186426   -0.003239    0.000998   -1.000695  2451990.791333
# Heliocentric elements and errors
Epoch:              2451990.5000  =  2001/03/22
Mean Anomaly:            6.53144 +/-     0.000
Argument of Peri:      170.31673 +/-     0.000
Long of Asc Node:        2.07432 +/-     0.000
Inclination:            13.70870 +/-     0.000
Eccentricity:         0.17383602 +/-    0.0000
Semi-Major Axis:     39.31216597 +/-    0.0000
Time of Perihelion: 2450357.0889 +/-       0.0
Perihelion:          32.47829558 +/-    0.0000
Aphelion:            46.14603636 +/-    0.0000
Period (y)              246.4896 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -32.52690083 +/-    0.0000
Ecliptic Y           -1.02868821 +/-    0.0000
Ecliptic Z            0.03642560 +/-    0.0000
Ecliptic XDOT         0.00002020 +/-    0.0000
Ecliptic YDOT        -0.00317176 +/-    0.0000
Ecliptic ZDOT        -0.00077337 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   32.54316930 +/-    0.0000
Geocenter to KBO     31.54664248 +/-    0.0000
# Hcoef:  7.81

The following table shows the complete astrometric record for 131318. 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 (131318) followed by the observatory code and reference code for the source of the astrometry.

2001 03  22.29059  12 06 45.70   -00 39 37.3   22.5R 131318    695  Cf4951      
2001 03  22.30184  12 06 45.63   -00 39 36.9   22.4R 131318    695  Cf4951      
2001 03  22.31291  12 06 45.54   -00 39 36.5   22.2R 131318    695  Cf4951      
2001 03  23.32870  12 06 39.74   -00 39 03.9         131318    695  Cf4951      
2001 03  23.33833  12 06 39.69   -00 39 03.7   22.5R 131318    695  Cf4951      
2001 03  23.35053  12 06 39.60   -00 39 03.1   22. R 131318    695  Cf4951      
2001 03  30.41266  12 05 59.01   -00 35 18.4   22.5R 131318    695  Cf4951      
2001 03  30.42386  12 05 58.95   -00 35 18.2         131318    695  Cf4951      
2001 03  30.43495  12 05 58.87   -00 35 18.1         131318    695  Cf4951      
2001 03  31.41486  12 05 53.31   -00 34 47.2         131318    695  Cf4951      
2001 03  31.42442  12 05 53.25   -00 34 46.8   22.5R 131318    695  Cf4951      
2001 03  31.43458  12 05 53.20   -00 34 46.5         131318    695  Cf4951      
2002 03  22.44419  12 13 40.66   -01 58 01.9   22.4R 131318    568  Cf4951      
2002 03  22.49321  12 13 40.37   -01 58 00.3   22.5R 131318    568  Cf4951      
2002 03  22.52705  12 13 40.17   -01 57 59.1   22.5R 131318    568  Cf4951      
2002 04  06.29619  12 12 15.79   -01 50 12.5         131318    696  Cf4951      
2002 04  06.40949  12 12 15.17   -01 50 08.9         131318    696  Cf4951      
2003 04  29.33351  12 17 12.07   -02 57 23.6   22.4R 131318    568  Ch9859      
2003 04  29.40058  12 17 11.78   -02 57 22.1         131318    568  Ch9859      
2003 04  30.35953  12 17 07.38   -02 56 58.1         131318    568  Ch9859      
2006 02  22.35927  12 43 44.79   -07 19 35.4   23.0R 131318    304  Cq6941      
2006 02  22.37389  12 43 44.73   -07 19 35.1         131318    304  Cq6941      
2014 05  30.19439  13 31 13.345  -16 17 39.82  23.3R 131318    695              
2014 05  30.29663  13 31 12.928  -16 17 37.19        131318    695              
2014 05  30.31727  13 31 12.860  -16 17 36.67        131318    695              
2015 03  23.36763  13 44 27.82   -17 55 50.5   22.3R 131318    695  C~1QOS      
2015 03  23.49350  13 44 27.15   -17 55 48.2         131318    695  C~1QOS      
2015 04  14.09819  13 42 25.39   -17 47 45.1   23.3V 131318    W84  C~2JSm      
2015 04  14.17134  13 42 24.95   -17 47 43.3         131318    W84  C~2JSm      
2015 04  14.26595  13 42 24.38   -17 47 40.7         131318    W84  C~2JSm      
2015 04  18.36794  13 42 00.12   -17 45 49.8         131318    W84  C~1TzP      
2015 04  19.35463  13 41 54.27   -17 45 22.4   23.6V 131318    W84  C~1TzP      
2015 04  22.35506  13 41 36.54   -17 43 58.0         131318    W84  C~1TzP      

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    -0.25       0.00     1.20
  2   0.0000      0.00    -0.11       0.00     0.21
  3   0.0001      0.00    -0.49       0.00     0.26
  4   0.0028      0.00     0.48       0.00     0.35
  5   0.0029      0.00     0.58       0.00     0.25
  6   0.0029      0.00     0.30       0.00     0.46
  7   0.0222      0.00     0.13       0.00     0.41
  8   0.0223      0.00     0.20       0.00     0.26
  9   0.0223      0.00    -0.04       0.00     0.01
 10   0.0250      0.00     0.18       0.00     0.07
 11   0.0250      0.00     0.10       0.00     0.17
 12   0.0250      0.00     0.23       0.00     0.15
 13   0.9997      0.00     0.64       0.00    -0.19
 14   0.9999      0.00     0.61       0.00    -0.15
 15   1.0000      0.00     0.58       0.00    -0.02
 16   1.0404      0.00    -0.26       0.00    -0.38
 17   1.0407      0.00     0.08       0.00    -0.29
 18   2.1028      0.00    -0.47       0.00    -0.77
 19   2.1030      0.00    -0.12       0.00    -0.97
 20   2.1056      0.00    -0.96       0.00    -1.00
 21   4.9228      0.00    -0.36       0.00     0.02
 22   4.9229      0.00    -0.31       0.00     0.05
 23  13.1880      0.00    -0.03       0.00     0.30
 24  13.1882      0.00    -0.20       0.00     0.28
 25  13.1883      0.00     0.00       0.00     0.27
 26  14.0016      0.00     0.10       0.00    -0.03
 27  14.0019      0.00     0.04       0.00     0.05
 28  14.0611      0.00    -0.04       0.00    -0.01
 29  14.0613      0.00    -0.06       0.00    -0.13
 30  14.0615      0.00    -0.08       0.00    -0.03
 31  14.0728      0.00     0.33       0.00     0.06
 32  14.0755      0.00     0.23       0.00     0.17
 33  14.0837      0.00     0.42       0.00     0.25

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.

131318    quality flag:3

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

axisobj        39.164    39.164    39.164
ecceobj         0.171     0.171     0.171
incobj         13.728    13.728    13.728
qmin           31.933    31.905    31.917
qmax           47.431    47.509    47.489
amean          39.456    39.456    39.456
amin           39.042    39.039    39.045
amax           39.936    39.931    39.935
emean           0.167     0.167     0.167
emin            0.142     0.142     0.141
emax            0.190     0.191     0.190
imean          14.364    14.357    14.363
imin           13.704    13.696    13.699
imax           15.071    15.077    15.071
excite_mean     0.299     0.299     0.299
fracstop        1.000     1.000     1.000
cjmean          2.949     2.949     2.949

libcent 0       181.1     180.1     180.1
libamp  0        84.3      87.6      84.6
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       173.9     174.9     174.0
kozaiamp        180.0     180.0     180.0