Orbit Fit and Astrometric record for 13UK17

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: 13UK17    
# Created Tue Feb 19 02:09:59 2019
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   41 observations of   41
# Arc:   5.11y
# First observation: 2013/08/02
#  Last observation: 2018/09/12
# Chi-squared of fit:    32.35 DOF:   76 RMS:  0.16
# Min/Max residuals:    -0.99    0.26
# Exact a, adot, b, bdot, g, gdot:
  1.509256E-05  1.232473E-02  3.363470E-06  5.696672E-03  1.852091E-02 -1.845469E-03
# Covariance matrix:
  1.6714E-13 -7.6928E-14  1.4507E-14 -2.5419E-14  7.5572E-14 -8.5333E-13
 -7.6928E-14  1.3830E-13 -3.4316E-14  6.5920E-14  3.3372E-14  2.2286E-12
  1.4507E-14 -3.4316E-14  7.4153E-14 -3.6766E-14 -1.0602E-14 -6.0803E-13
 -2.5419E-14  6.5920E-14 -3.6766E-14  4.6618E-14  2.3313E-14  1.1736E-12
  7.5572E-14  3.3372E-14 -1.0602E-14  2.3313E-14  1.1820E-13  7.9535E-13
 -8.5333E-13  2.2286E-12 -6.0803E-13  1.1736E-12  7.9535E-13  3.9689E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -3.024472   15.881670    0.927028   -0.022004   -0.417063  2456507.055948
# Heliocentric elements and errors
Epoch:              2456506.5000  =  2013/08/02
Mean Anomaly:          219.70738 +/-     0.062
Argument of Peri:      149.34609 +/-     0.060
Long of Asc Node:       21.37003 +/-     0.000
Inclination:            24.97259 +/-     0.000
Eccentricity:         0.28567091 +/-    0.0002
Semi-Major Axis:     43.73463660 +/-    0.0035
Time of Perihelion: 2497675.3780 +/-      19.9
Perihelion:          31.24092296 +/-    0.0081
Aphelion:            56.22835025 +/-    0.0089
Period (y)              289.2321 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           52.51482494 +/-    0.0010
Ecliptic Y           13.98063197 +/-    0.0003
Ecliptic Z           -2.84858468 +/-    0.0001
Ecliptic XDOT        -0.00072409 +/-    0.0000
Ecliptic YDOT         0.00168914 +/-    0.0000
Ecliptic ZDOT         0.00085547 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   54.41865328 +/-    0.0009
Geocenter to KBO     53.99313120 +/-    0.0010
# Hcoef:  6.71

The following table shows the complete astrometric record for 13UK17. 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 (13UK17) followed by the observatory code and reference code for the source of the astrometry.

2013 08  02.55517  01 03 10.904  +03 27 23.68  23.5r 13UK17    568  C~2NKZ      
2013 09  04.41206  01 01 59.112  +03 20 20.63  24.2r 13UK17    568  C~2NKZ      
2013 09  04.45483  01 01 58.977  +03 20 19.86  23.9r 13UK17    568  C~2NKZ      
2013 10  06.39317  01 00 08.050  +03 10 06.19  23.6r 13UK17    568  C~2NKZ      
2013 10  06.45289  01 00 07.814  +03 10 04.60  23.5r 13UK17    568  C~2NKZ      
2013 10  06.46664  01 00 07.774  +03 10 04.68  23.7r 13UK17    568  C~2NKZ      
2013 10  06.47596  01 00 07.730  +03 10 04.59  23.7r 13UK17    568  C~2NKZ      
2013 10  09.51669  00 59 56.338  +03 09 04.19  23.8r 13UK17    568  C~2NKZ      
2013 10  31.23488  00 58 37.064  +03 02 23.39  24.2r 13UK17    568  C~2NKZ      
2013 10  31.27795  00 58 36.933  +03 02 22.81  23.8r 13UK17    568  C~2NKZ      
2013 10  31.32073  00 58 36.771  +03 02 21.96  24.0r 13UK17    568  C~2NKZ      
2013 11  01.26121  00 58 33.545  +03 02 06.54  23.9r 13UK17    568  C~2NKZ      
2013 11  01.38296  00 58 33.127  +03 02 04.56  24.0r 13UK17    568  C~2NKZ      
2013 11  05.38795  00 58 19.662  +03 01 01.44  24.0r 13UK17    568  C~2NKZ      
2013 11  29.22393  00 57 13.176  +02 56 26.51  23.7r 13UK17    568  C~2NKZ      
2014 06  27.58224  01 05 18.787  +04 01 41.33  24.0r 13UK17    568  C~2NKZ      
2014 06  28.58731  01 05 19.933  +04 01 48.69  24.0r 13UK17    568  C~2NKZ      
2014 07  23.58328  01 05 27.039  +04 02 38.54  24.3r 13UK17    568  C~2NKZ      
2014 07  27.56394  01 05 24.323  +04 02 22.90  24.1r 13UK17    568  C~2NKZ      
2014 08  22.56038  01 04 42.206  +03 58 19.66  24.0r 13UK17    568  C~2NKZ      
2014 08  23.51871  01 04 39.925  +03 58 06.81  25.6u 13UK17    568  C~2NKZ      
2014 08  23.52297  01 04 39.891  +03 58 06.79  24.9u 13UK17    568  C~2NKZ      
2014 08  23.52723  01 04 39.896  +03 58 06.68  25.7u 13UK17    568  C~2NKZ      
2014 08  23.53149  01 04 39.872  +03 58 06.62  25.0u 13UK17    568  C~2NKZ      
2014 08  28.42232  01 04 27.431  +03 56 55.36  23.8r 13UK17    568  C~2NKZ      
2014 10  23.28767  01 01 13.769  +03 39 29.59  23.6r 13UK17    568  C~2NKZ      
2014 10  27.25444  01 00 59.394  +03 38 18.02  23.8r 13UK17    568  C~2NKZ      
2014 11  24.23218  00 59 32.043  +03 31 42.11  24.1r 13UK17    568  C~2NKZ      
2014 11  25.22838  00 59 29.568  +03 31 32.65  23.9r 13UK17    568  C~2NKZ      
2014 12  17.24695  00 58 49.603  +03 29 42.05  23.7r 13UK17    568  C~2NKZ      
2014 12  17.26663  00 58 49.580  +03 29 41.83  23.7r 13UK17    568  C~2NKZ      
2015 01  18.22018  00 58 50.044  +03 33 16.71  24.0r 13UK17    568  C~2NKZ      
2017 07  24.58173  01 11 49.631  +05 45 59.74        13UK17    568  C~2NKZ      
2017 08  25.62549  01 11 00.318  +05 41 54.31        13UK17    568  C~2NKZ      
2017 08  30.48798  01 10 47.670  +05 40 47.30  24.0w 13UK17    568  C~2NKZ      
2017 08  30.54049  01 10 47.518  +05 40 46.51  24.0w 13UK17    568  C~2NKZ      
2018 09  09.39423  01 12 29.952  +06 13 24.79  24.3r 13UK17    568              
2018 09  09.60653  01 12 29.280  +06 13 21.27  24.2r 13UK17    568              
2018 09  11.42573  01 12 23.522  +06 12 51.10  24.1r 13UK17    568              
2018 09  12.61600  01 12 19.671  +06 12 30.96  24.1r 13UK17    568              
2018 09  12.62435  01 12 19.647  +06 12 30.76  24.1r 13UK17    568              

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    -0.99       0.00    -0.08
  2   0.0900      0.00     0.08       0.00     0.07
  3   0.0901      0.00     0.01       0.00     0.03
  4   0.1775      0.00     0.04       0.00     0.02
  5   0.1777      0.00    -0.08       0.00    -0.38
  6   0.1777      0.00     0.10       0.00    -0.03
  7   0.1777      0.00    -0.03       0.00     0.07
  8   0.1861      0.00     0.19       0.00     0.03
  9   0.2455      0.00    -0.04       0.00    -0.05
 10   0.2456      0.00     0.25       0.00     0.08
 11   0.2458      0.00     0.08       0.00    -0.06
 12   0.2483      0.00     0.11       0.00    -0.04
 13   0.2487      0.00     0.21       0.00    -0.03
 14   0.2596      0.00     0.00       0.00     0.08
 15   0.3249      0.00    -0.08       0.00     0.00
 16   0.9008      0.00     0.16       0.00     0.04
 17   0.9036      0.00     0.07       0.00     0.01
 18   0.9720      0.00     0.00       0.00     0.23
 19   0.9829      0.00    -0.06       0.00     0.08
 20   1.0541      0.00     0.05       0.00    -0.17
 21   1.0567      0.00     0.26       0.00     0.14
 22   1.0567      0.00    -0.09       0.00     0.18
 23   1.0567      0.00     0.14       0.00     0.13
 24   1.0567      0.00    -0.06       0.00     0.13
 25   1.0701      0.00     0.12       0.00    -0.03
 26   1.2231      0.00     0.06       0.00     0.05
 27   1.2339      0.00    -0.13       0.00     0.02
 28   1.3105      0.00    -0.16       0.00    -0.19
 29   1.3133      0.00    -0.03       0.00    -0.08
 30   1.3736      0.00    -0.00       0.00     0.06
 31   1.3736      0.00     0.00       0.00    -0.15
 32   1.4611      0.00    -0.07       0.00    -0.10
 33   3.9754      0.00    -0.07       0.00    -0.05
 34   4.0632      0.00     0.07       0.00     0.04
 35   4.0765      0.00     0.03       0.00     0.01
 36   4.0766      0.00    -0.06       0.00    -0.02
 37   5.1029      0.00    -0.30       0.00    -0.01
 38   5.1035      0.00    -0.20       0.00    -0.05
 39   5.1085      0.00    -0.11       0.00    -0.02
 40   5.1117      0.00     0.01       0.00    -0.03
 41   5.1118      0.00     0.06       0.00    -0.08

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.

13UK17    quality flag:3

Type:         7:4EEE    7:4EEE    7:4EEE
Type:         7:4EII    7:4EII    7:4EII

axisobj        43.889    43.888    43.889
ecceobj         0.280     0.280     0.280
incobj         24.885    24.885    24.885
qmin           30.143    30.143    30.144
qmax           57.815    57.817    57.813
amean          43.724    43.724    43.724
amin           43.345    43.345    43.344
amax           44.196    44.196    44.196
emean           0.243     0.243     0.243
emin            0.125     0.125     0.125
emax            0.310     0.310     0.310
imean          26.015    26.015    26.015
imin           24.162    24.162    24.162
imax           28.756    28.756    28.756
excite_mean     0.505     0.505     0.505
fracstop        1.000     1.000     1.000
cjmean          2.784     2.784     2.784

libcent 0       179.7     179.7     179.8
libamp  0        52.3      52.3      52.3
libcent 1       183.4     183.5     183.4
libamp  1       101.2     101.1     101.2
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       180.7     180.7     180.7
kozaiamp         39.9      39.9      39.9