Orbit Fit and Astrometric record for 13KZ18

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: 13KZ18    
# Created Mon Dec 10 02:09:36 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting  105 observations of  105
# Arc:   7.03y
# First observation: 2010/08/05
#  Last observation: 2017/08/15
# Chi-squared of fit:    87.42 DOF:  204 RMS:  0.16
# Min/Max residuals:    -0.40    0.77
# Exact a, adot, b, bdot, g, gdot:
  2.213303E-05  7.401324E-02  1.542733E-05  5.292535E-02  5.406519E-02 -1.328807E-02
# Covariance matrix:
  1.7348E-13 -6.7467E-14  5.8816E-14 -3.4425E-14 -1.6293E-14 -7.0748E-14
 -6.7467E-14  3.3184E-14 -3.4897E-14  2.0464E-14  1.1854E-14  4.2035E-14
  5.8816E-14 -3.4897E-14  1.3588E-13 -4.4930E-14 -1.3206E-14 -5.1726E-14
 -3.4425E-14  2.0464E-14 -4.4930E-14  1.9576E-14  8.4591E-15  3.0323E-14
 -1.6293E-14  1.1854E-14 -1.3206E-14  8.4591E-15  4.4734E-14  1.6997E-14
 -7.0748E-14  4.2035E-14 -5.1726E-14  3.0323E-14  1.6997E-14  6.2292E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.173913  -44.545445    0.048540   -0.003113   -1.009247  2455413.986696
# Heliocentric elements and errors
Epoch:              2455414.5000  =  2010/08/06
Mean Anomaly:          350.55779 +/-     0.001
Argument of Peri:       27.13250 +/-     0.001
Long of Asc Node:      315.54782 +/-     0.000
Inclination:            35.54334 +/-     0.000
Eccentricity:         0.45229186 +/-    0.0000
Semi-Major Axis:     34.37466302 +/-    0.0011
Time of Perihelion: 2457345.2551 +/-       3.4
Perihelion:          18.82728288 +/-    0.0008
Aphelion:            49.92204316 +/-    0.0016
Period (y)              201.5421 +/-      0.01
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           13.87176396 +/-    0.0001
Ecliptic Y          -13.71846460 +/-    0.0001
Ecliptic Z           -0.05582243 +/-    0.0000
Ecliptic XDOT         0.00215629 +/-    0.0000
Ecliptic YDOT         0.00314375 +/-    0.0000
Ecliptic ZDOT         0.00268213 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   19.50969138 +/-    0.0001
Geocenter to KBO     18.49629431 +/-    0.0001
# Hcoef:  8.95

The following table shows the complete astrometric record for 13KZ18. 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 (13KZ18) followed by the observatory code and reference code for the source of the astrometry.

2010 08  05.48593  21 11 52.861  -16 22 06.65  21.6G 13KZ18    F51  C~2jhD      
2010 08  30.42401  21 07 40.814  -16 27 38.29  21.4G 13KZ18    F51  C~2jhD      
2010 08  31.40510  21 07 31.618  -16 27 48.00  21.8G 13KZ18    F51  C~2jhD      
2010 08  31.41682  21 07 31.514  -16 27 48.20  21.6G 13KZ18    F51  C~2jhD      
2011 08  03.48309  21 25 20.678  -12 07 52.53  21.1G 13KZ18    F51  C~2jhD      
2011 08  17.37913  21 22 58.194  -12 11 42.45  21.5G 13KZ18    F51  C~2jhD      
2012 08  13.42343  21 36 28.188  -07 49 18.30  21.4w 13KZ18    F51  C~1vWz      
2012 08  13.43797  21 36 28.034  -07 49 18.66  21.5w 13KZ18    F51  C~1vWz      
2012 08  13.45249  21 36 27.888  -07 49 18.78  21.6w 13KZ18    F51  C~1vWz      
2012 08  16.40707  21 35 57.687  -07 50 15.00  21.2G 13KZ18    F51  C~2jhD      
2012 08  16.41708  21 35 57.593  -07 50 15.20  21.1G 13KZ18    F51  C~2jhD      
2012 08  16.42722  21 35 57.475  -07 50 15.49  21.4G 13KZ18    F51  C~2jhD      
2012 08  16.43759  21 35 57.377  -07 50 15.39  21.6G 13KZ18    F51  C~2jhD      
2012 08  26.35091  21 34 17.137  -07 53 40.80  21.8G 13KZ18    F51  C~2jhD      
2012 08  26.36261  21 34 17.010  -07 53 41.21  22.2G 13KZ18    F51  C~2jhD      
2012 08  26.44451  21 34 16.161  -07 53 43.11  21.5G 13KZ18    F51  C~2jhD      
2013 05  16.56257  21 57 02.941  -03 58 43.14  22.0w 13KZ18    F51  C~1vWz      
2013 05  16.56783  21 57 02.952  -03 58 42.96  22.2w 13KZ18    F51  C~1vWz      
2013 05  16.57309  21 57 02.968  -03 58 42.67  21.7w 13KZ18    F51  C~1vWz      
2013 05  16.57834  21 57 02.979  -03 58 42.25  21.7w 13KZ18    F51  C~1vWz      
2013 05  20.58423  21 57 11.138  -03 54 03.97  20.9G 13KZ18    F51  C~2jhD      
2013 05  20.58950  21 57 11.103  -03 54 03.72  21.2G 13KZ18    F51  C~2jhD      
2013 06  20.56107  21 56 29.368  -03 27 26.85  21.9w 13KZ18    F51  C~1vWz      
2013 06  20.57412  21 56 29.323  -03 27 26.25  21.8w 13KZ18    F51  C~1vWz      
2013 06  20.58716  21 56 29.250  -03 27 25.93  21.6w 13KZ18    F51  C~1vWz      
2013 06  20.60018  21 56 29.193  -03 27 25.21  21.8w 13KZ18    F51  C~1vWz      
2013 07  15.47414  21 53 53.571  -03 18 49.90  20.9G 13KZ18    F51  C~2jhD      
2013 07  15.51709  21 53 53.243  -03 18 49.64  21.5G 13KZ18    F51  C~2jhD      
2013 08  01.53510  21 51 21.560  -03 19 07.87  21.3i 13KZ18    F51  C~1vWz      
2013 08  01.54733  21 51 21.467  -03 19 07.77  21.2i 13KZ18    F51  C~1vWz      
2013 08  01.57260  21 51 21.212  -03 19 08.23  21.3r 13KZ18    F51  C~1vWz      
2013 08  12.44684  21 49 33.451  -03 21 30.97  21.7w 13KZ18    F51  C~1vWz      
2013 08  12.46189  21 49 33.296  -03 21 31.28  21.6w 13KZ18    F51  C~1vWz      
2013 08  12.47738  21 49 33.138  -03 21 31.47  21.4w 13KZ18    F51  C~1vWz      
2013 08  12.49235  21 49 32.976  -03 21 31.75  21.6w 13KZ18    F51  C~1vWz      
2013 08  17.43808  21 48 42.805  -03 23 04.13  22.2G 13KZ18    F51  C~2jhD      
2013 08  17.44953  21 48 42.704  -03 23 04.17  21.9G 13KZ18    F51  C~2jhD      
2013 08  18.44452  21 48 32.565  -03 23 24.46  21.2i 13KZ18    F51  C~1vWz      
2013 08  18.45520  21 48 32.455  -03 23 24.70  21.3i 13KZ18    F51  C~1vWz      
2013 08  18.47608  21 48 32.252  -03 23 25.26  21.4r 13KZ18    F51  C~1vWz      
2013 09  27.29208  21 42 29.370  -03 40 48.15  21.4G 13KZ18    F51  C~2jhD      
2013 09  27.30629  21 42 29.304  -03 40 47.78  22.2G 13KZ18    F51  C~2jhD      
2013 09  27.32052  21 42 29.154  -03 40 48.87  21.8G 13KZ18    F51  C~2jhD      
2013 09  27.33475  21 42 29.038  -03 40 48.97  21.8G 13KZ18    F51  C~2jhD      
2014 06  30.51697  22 08 17.734  +01 02 43.34  21.6w 13KZ18    F51  C~1vWz      
2014 06  30.53060  22 08 17.658  +01 02 43.76  21.7w 13KZ18    F51  C~1vWz      
2014 06  30.54433  22 08 17.591  +01 02 44.36  21.8w 13KZ18    F51  C~1vWz      
2014 06  30.55811  22 08 17.507  +01 02 44.73  21.8w 13KZ18    F51  C~1vWz      
2014 07  10.54294  22 07 16.417  +01 07 35.74  21.2i 13KZ18    F51  C~1vWz      
2014 07  10.55648  22 07 16.321  +01 07 36.17  21.3i 13KZ18    F51  C~1vWz      
2014 07  10.57009  22 07 16.221  +01 07 36.47  21.3i 13KZ18    F51  C~1vWz      
2014 09  04.37757  21 58 38.808  +01 00 41.64  22.0G 13KZ18    F51  C~2jhD      
2014 09  04.38917  21 58 38.696  +01 00 41.29  21.7G 13KZ18    F51  C~2jhD      
2014 09  04.40078  21 58 38.570  +01 00 40.76  20.9G 13KZ18    F51  C~2jhD      
2014 09  15.39004  21 56 55.254  +00 54 43.21  21.2i 13KZ18    F51  C~1vWz      
2014 09  15.40226  21 56 55.146  +00 54 42.76  21.1i 13KZ18    F51  C~1vWz      
2014 09  15.41455  21 56 55.035  +00 54 42.56  21.3i 13KZ18    F51  C~1vWz      
2014 09  15.42686  21 56 54.925  +00 54 41.64  21.1i 13KZ18    F51  C~1vWz      
2014 10  09.37748  21 53 55.785  +00 40 58.79  21.2G 13KZ18    F51  C~2jhD      
2014 11  19.21443  21 52 40.772  +00 28 19.29  21.9w 13KZ18    F51  C~1vWz      
2014 11  19.22635  21 52 40.813  +00 28 19.40  22.0w 13KZ18    F51  C~1vWz      
2014 11  19.23826  21 52 40.844  +00 28 19.37  21.7w 13KZ18    F51  C~1vWz      
2014 11  19.25014  21 52 40.868  +00 28 19.42  21.7w 13KZ18    F51  C~1vWz      
2015 07  18.55054  22 19 10.923  +05 38 54.93  21.5w 13KZ18    F51  C~1vWz      
2015 07  18.55118  22 19 10.914  +05 38 54.69  21.5w 13KZ18    F51  C~1vWz      
2015 07  18.56247  22 19 10.824  +05 38 55.22  21.6w 13KZ18    F51  C~1vWz      
2015 07  18.56331  22 19 10.802  +05 38 54.99  21.4w 13KZ18    F51  C~1vWz      
2015 07  18.57480  22 19 10.752  +05 38 55.21  21.5w 13KZ18    F51  C~1vWz      
2015 07  18.57545  22 19 10.728  +05 38 55.48  21.5w 13KZ18    F51  C~1vWz      
2015 07  18.58689  22 19 10.643  +05 38 55.55  21.7w 13KZ18    F51  C~1vWz      
2015 07  18.58753  22 19 10.663  +05 38 56.01  21.8w 13KZ18    F51  C~1vWz      
2015 07  19.51263  22 19 03.665  +05 39 16.82  21.5w 13KZ18    F51  C~1vWz      
2015 07  19.51328  22 19 03.656  +05 39 16.81  21.6G 13KZ18    F51  C~2jhD      
2015 07  19.52450  22 19 03.570  +05 39 17.10  21.5w 13KZ18    F51  C~1vWz      
2015 07  19.52465  22 19 03.570  +05 39 17.07  21.5G 13KZ18    F51  C~2jhD      
2015 07  19.52529  22 19 03.558  +05 39 17.12  21.4G 13KZ18    F51  C~2jhD      
2015 07  19.53672  22 19 03.479  +05 39 17.40  21.4w 13KZ18    F51  C~1vWz      
2015 07  19.54889  22 19 03.380  +05 39 17.56  21.4w 13KZ18    F51  C~1vWz      
2015 07  30.42748  22 17 33.529  +05 41 55.61  21.1i 13KZ18    F51  C~1vWz      
2015 07  30.43940  22 17 33.417  +05 41 55.99  21.1i 13KZ18    F51  C~1vWz      
2015 07  30.45125  22 17 33.305  +05 41 55.77  21.1i 13KZ18    F51  C~1vWz      
2015 07  30.46311  22 17 33.198  +05 41 56.09  21.3i 13KZ18    F51  C~1vWz      
2015 07  30.46316  22 17 33.212  +05 41 55.94  21.8G 13KZ18    F51  C~2jhD      
2015 10  02.38797  22 07 31.268  +05 15 17.81  21.6G 13KZ18    F51  C~2jhD      
2015 10  02.39994  22 07 31.181  +05 15 17.20  21.5G 13KZ18    F51  C~2jhD      
2015 10  02.41191  22 07 31.084  +05 15 16.63  21.6G 13KZ18    F51  C~2jhD      
2015 10  02.42398  22 07 30.997  +05 15 16.29  21.6G 13KZ18    F51  C~2jhD      
2015 10  03.36466  22 07 24.160  +05 14 35.82  21.8G 13KZ18    F51  C~2jhD      
2015 10  03.37676  22 07 24.065  +05 14 35.43  22.2G 13KZ18    F51  C~2jhD      
2015 10  03.38877  22 07 23.971  +05 14 34.91  21.5G 13KZ18    F51  C~2jhD      
2015 10  03.40076  22 07 23.877  +05 14 34.48  22.2G 13KZ18    F51  C~2jhD      
2015 10  27.23212  22 05 18.573  +04 58 41.56  21.5G 13KZ18    F51  C~2jhD      
2016 06  10.59294  22 34 38.246  +09 27 59.93  21.9G 13KZ18    F51  C~2jhD      
2016 07  17.44520  22 32 16.007  +10 05 39.57  21.4G 13KZ18    F51  C~2jhD      
2016 07  17.45726  22 32 15.927  +10 05 39.65  21.4G 13KZ18    F51  C~2jhD      
2016 07  17.46927  22 32 15.825  +10 05 40.02  21.3G 13KZ18    F51  C~2jhD      
2016 07  17.48123  22 32 15.755  +10 05 40.57  21.5G 13KZ18    F51  C~2jhD      
2016 08  02.40825  22 30 08.484  +10 11 41.00  21.4G 13KZ18    F51  C~2jhD      
2016 08  02.42012  22 30 08.377  +10 11 41.06  21.6G 13KZ18    F51  C~2jhD      
2016 08  02.43196  22 30 08.272  +10 11 41.15  21.5G 13KZ18    F51  C~2jhD      
2016 08  02.44382  22 30 08.161  +10 11 41.39  21.4G 13KZ18    F51  C~2jhD      
2017 08  15.50985  22 41 35.314  +14 38 54.71  21.7G 13KZ18    F51  C~2jhD      
2017 08  15.52130  22 41 35.178  +14 38 54.52  21.4G 13KZ18    F51  C~2jhD      
2017 08  15.53271  22 41 35.082  +14 38 54.60  22.0G 13KZ18    F51  C~2jhD      
2017 08  15.54417  22 41 34.980  +14 38 54.68  21.6G 13KZ18    F51  C~2jhD      

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    -0.10       0.00    -0.02
  2   0.0683      0.00    -0.00       0.00    -0.08
  3   0.0710      0.00     0.04       0.00    -0.13
  4   0.0710      0.00     0.15       0.00    -0.22
  5   0.9938      0.00     0.13       0.00     0.28
  6   1.0319      0.00     0.07       0.00    -0.08
  7   2.0231      0.00     0.03       0.00     0.03
  8   2.0231      0.00    -0.01       0.00    -0.06
  9   2.0232      0.00     0.07       0.00     0.08
 10   2.0313      0.00    -0.02       0.00    -0.10
 11   2.0313      0.00     0.14       0.00    -0.10
 12   2.0313      0.00    -0.05       0.00    -0.20
 13   2.0314      0.00     0.10       0.00     0.11
 14   2.0585      0.00     0.09       0.00     0.06
 15   2.0585      0.00    -0.03       0.00    -0.09
 16   2.0588      0.00    -0.33       0.00    -0.22
 17   2.7791      0.00    -0.16       0.00     0.31
 18   2.7791      0.00    -0.17       0.00     0.11
 19   2.7792      0.00    -0.11       0.00     0.03
 20   2.7792      0.00    -0.13       0.00     0.07
 21   2.7901      0.00     0.57       0.00    -0.06
 22   2.7902      0.00    -0.07       0.00    -0.17
 23   2.8749      0.00     0.05       0.00     0.05
 24   2.8750      0.00     0.24       0.00     0.20
 25   2.8750      0.00     0.02       0.00     0.07
 26   2.8751      0.00     0.03       0.00     0.34
 27   2.9432      0.00    -0.35       0.00    -0.03
 28   2.9433      0.00     0.03       0.00    -0.08
 29   2.9899      0.00    -0.40       0.00    -0.05
 30   2.9899      0.00     0.00       0.00     0.15
 31   2.9900      0.00    -0.11       0.00    -0.08
 32   3.0197      0.00    -0.08       0.00     0.02
 33   3.0198      0.00    -0.08       0.00    -0.03
 34   3.0198      0.00    -0.06       0.00     0.04
 35   3.0199      0.00    -0.17       0.00     0.02
 36   3.0334      0.00    -0.04       0.00    -0.15
 37   3.0334      0.00     0.22       0.00     0.04
 38   3.0362      0.00    -0.11       0.00     0.05
 39   3.0362      0.00    -0.10       0.00     0.03
 40   3.0362      0.00     0.10       0.00    -0.10
 41   3.1453      0.00     0.21       0.00    -0.09
 42   3.1453      0.00     0.77       0.00     0.65
 43   3.1453      0.00     0.07       0.00    -0.07
 44   3.1454      0.00    -0.11       0.00     0.19
 45   3.9015      0.00    -0.02       0.00     0.06
 46   3.9016      0.00    -0.03       0.00    -0.00
 47   3.9016      0.00     0.10       0.00     0.11
 48   3.9016      0.00    -0.02       0.00    -0.00
 49   3.9290      0.00     0.07       0.00    -0.06
 50   3.9290      0.00     0.07       0.00     0.06
 51   3.9290      0.00     0.01       0.00     0.04
 52   4.0818      0.00    -0.05       0.00    -0.05
 53   4.0819      0.00     0.01       0.00    -0.05
 54   4.0819      0.00    -0.15       0.00    -0.22
 55   4.1120      0.00    -0.31       0.00     0.22
 56   4.1120      0.00    -0.25       0.00     0.19
 57   4.1121      0.00    -0.23       0.00     0.41
 58   4.1121      0.00    -0.19       0.00    -0.09
 59   4.1777      0.00    -0.11       0.00    -0.09
 60   4.2895      0.00    -0.12       0.00    -0.05
 61   4.2895      0.00     0.12       0.00     0.06
 62   4.2895      0.00     0.20       0.00     0.03
 63   4.2896      0.00     0.18       0.00     0.08
 64   4.9502      0.00     0.16       0.00    -0.06
 65   4.9502      0.00     0.10       0.00    -0.32
 66   4.9502      0.00     0.05       0.00    -0.05
 67   4.9502      0.00    -0.18       0.00    -0.30
 68   4.9503      0.00     0.39       0.00    -0.35
 69   4.9503      0.00     0.11       0.00    -0.09
 70   4.9503      0.00     0.15       0.00    -0.29
 71   4.9503      0.00     0.52       0.00     0.15
 72   4.9528      0.00     0.04       0.00     0.00
 73   4.9528      0.00    -0.02       0.00    -0.02
 74   4.9529      0.00     0.00       0.00     0.02
 75   4.9529      0.00     0.02       0.00    -0.01
 76   4.9529      0.00    -0.08       0.00     0.02
 77   4.9529      0.00     0.07       0.00     0.05
 78   4.9529      0.00     0.01       0.00    -0.06
 79   4.9827      0.00    -0.15       0.00    -0.12
 80   4.9828      0.00    -0.21       0.00     0.17
 81   4.9828      0.00    -0.29       0.00    -0.13
 82   4.9828      0.00    -0.29       0.00     0.10
 83   4.9828      0.00    -0.07       0.00    -0.05
 84   5.1578      0.00     0.03       0.00     0.07
 85   5.1579      0.00     0.07       0.00    -0.03
 86   5.1579      0.00    -0.03       0.00    -0.09
 87   5.1579      0.00     0.03       0.00     0.09
 88   5.1605      0.00     0.16       0.00    -0.17
 89   5.1605      0.00     0.08       0.00    -0.05
 90   5.1606      0.00     0.00       0.00    -0.05
 91   5.1606      0.00    -0.08       0.00     0.03
 92   5.2259      0.00     0.05       0.00    -0.08
 93   5.8483      0.00     0.17       0.00    -0.01
 94   5.9492      0.00     0.03       0.00     0.31
 95   5.9493      0.00     0.12       0.00    -0.03
 96   5.9493      0.00    -0.13       0.00    -0.09
 97   5.9493      0.00     0.10       0.00     0.05
 98   5.9929      0.00    -0.00       0.00     0.04
 99   5.9930      0.00     0.01       0.00    -0.03
100   5.9930      0.00     0.05       0.00    -0.07
101   5.9930      0.00    -0.00       0.00     0.04
102   7.0281      0.00     0.08       0.00     0.13
103   7.0282      0.00    -0.25       0.00    -0.04
104   7.0282      0.00     0.00       0.00     0.05
105   7.0282      0.00     0.17       0.00     0.14

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.

13KZ18    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        34.058    34.057    34.058
ecceobj         0.449     0.449     0.449
incobj         35.577    35.577    35.577
qmin           18.740    18.741    18.740
qmax           50.386    50.892    50.831
amean          34.200    34.258    34.338
amin           33.950    33.812    33.950
amax           34.730    34.952    34.876
emean           0.448     0.375     0.449
emin            0.443     0.226     0.443
emax            0.454     0.458     0.457
imean          37.001    39.477    37.016
imin           36.870    36.864    36.881
imax           37.125    43.160    37.125
excite_mean     0.750     0.741     0.751
fracstop        0.002     0.081     0.003
cjmean          2.395     2.389     2.393

libcent 0      -180.0    -180.0    -180.0
libamp  0      -180.0    -180.0    -180.0
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        27.7      56.0      27.9
kozaiamp          0.7      21.7       0.8