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 Sat Dec 16 02:37:58 2017
# Orbit generated from Bernstein formalism
# Fitting   36 observations of   36
# Arc:   4.08y
# First observation: 2013/08/02
#  Last observation: 2017/08/30
Preliminary a, adot, b, bdot, g, gdot:
  -0.000138   0.012515  -0.000035   0.005772   0.018591   0.000000
# Chi-squared of fit:    29.40 DOF:   66 RMS:  0.16
# Min/Max residuals:    -0.94    0.31
# Exact a, adot, b, bdot, g, gdot:
  1.508975E-05  1.232471E-02  3.362168E-06  5.696676E-03  1.852092E-02 -1.845252E-03
# Covariance matrix:
  1.7204E-13 -7.5642E-14  8.7872E-15 -1.5872E-14  8.1808E-14 -6.5340E-13
 -7.5642E-14  1.5644E-13 -3.0897E-14  6.6562E-14  4.8709E-14  2.8156E-12
  8.7872E-15 -3.0897E-14  8.2320E-14 -4.8614E-14 -1.4102E-14 -6.9527E-13
 -1.5872E-14  6.6562E-14 -4.8614E-14  6.5689E-14  3.4041E-14  1.5095E-12
  8.1808E-14  4.8709E-14 -1.4102E-14  3.4041E-14  1.3669E-13  1.4615E-12
 -6.5340E-13  2.8156E-12 -6.9527E-13  1.5095E-12  1.4615E-12  6.3922E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -3.024472   15.881670    0.927028   -0.022004   -0.417063  2456507.055948
# Heliocentric elements and errors
Epoch:              2456500.5000  =  2013/07/27
Mean Anomaly:          219.68297 +/-     0.081
Argument of Peri:      149.34839 +/-     0.077
Long of Asc Node:       21.37002 +/-     0.000
Inclination:            24.97262 +/-     0.001
Eccentricity:         0.28566733 +/-    0.0002
Semi-Major Axis:     43.73445399 +/-    0.0046
Time of Perihelion: 2497676.2836 +/-      22.8
Perihelion:          31.24094910 +/-    0.0097
Aphelion:            56.22795888 +/-    0.0109
Period (y)              289.2303 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           52.51481476 +/-    0.0010
Ecliptic Y           13.98062892 +/-    0.0003
Ecliptic Z           -2.84858419 +/-    0.0001
Ecliptic XDOT        -0.00072405 +/-    0.0000
Ecliptic YDOT         0.00168915 +/-    0.0000
Ecliptic ZDOT         0.00085547 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   54.41854635 +/-    0.0010
Geocenter to KBO     53.99300726 +/-    0.0011
# Hcoef:  6.67

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      

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    -0.94       0.00     0.31
  2   0.0900  -1155.05     0.10      21.47     0.03
  3   0.0901  -1157.21     0.03      21.54     0.02
  4   0.1775  -2926.92     0.05      92.43     0.00
  5   0.1777  -2930.80    -0.22      92.32    -0.32
  6   0.1777  -2931.32     0.08      92.62    -0.06
  7   0.1777  -2931.96     0.00      92.79     0.07
  8   0.1861  -3112.73     0.19     102.55    -0.05
  9   0.2455  -4363.38    -0.06     188.71    -0.03
 10   0.2456  -4365.42     0.27     188.92    -0.02
 11   0.2458  -4367.98     0.05     189.07    -0.09
 12   0.2483  -4418.54     0.09     193.41    -0.08
 13   0.2487  -4425.09     0.18     193.99    -0.11
 14   0.2596  -4635.65     0.03     213.25     0.07
 15   0.3249  -5661.38    -0.08     342.47     0.04
 16   0.9008   2556.45     0.16    1167.66    -0.03
 17   0.9036   2575.11     0.06    1167.89    -0.01
 18   0.9720   2692.44     0.09    1173.26     0.21
 19   0.9829   2648.90    -0.03    1174.36     0.10
 20   1.0541   1973.49    -0.02    1190.87    -0.17
 21   1.0567   1937.03     0.29    1192.07     0.03
 22   1.0567   1936.55    -0.02    1192.25     0.20
 23   1.0567   1936.58     0.18    1192.12     0.06
 24   1.0567   1936.23    -0.01    1192.20     0.14
 25   1.0701   1736.94     0.10    1197.66    -0.07
 26   1.2231  -1341.16     0.07    1343.01     0.02
 27   1.2339  -1567.35    -0.12    1359.52     0.07
 28   1.3105  -2927.03    -0.23    1496.21    -0.11
 29   1.3133  -2964.89    -0.07    1501.71    -0.07
 30   1.3736  -3559.97     0.02    1629.60     0.06
 31   1.3736  -3560.37    -0.06    1629.52    -0.14
 32   1.4611  -3471.35    -0.11    1825.26    -0.06
 33   3.9754  10354.31    -0.09    4727.62    -0.02
 34   4.0632   9578.31     0.07    4780.47     0.01
 35   4.0765   9377.76     0.02    4790.31    -0.00
 36   4.0766   9375.35    -0.07    4790.44     0.00

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        43.887    43.900    43.874
ecceobj         0.280     0.281     0.280
incobj         24.886    24.886    24.886
qmin           30.137    30.141    30.080
qmax           57.800    57.775    57.852
amean          43.724    43.724    43.724
amin           43.346    43.341    43.327
amax           44.204    44.209    44.211
emean           0.242     0.244     0.238
emin            0.125     0.127     0.116
emax            0.310     0.310     0.311
imean          26.021    26.006    26.105
imin           24.163    24.161    24.133
imax           28.764    28.750    28.888
excite_mean     0.505     0.505     0.505
fracstop        1.000     1.000     1.000
cjmean          2.784     2.784     2.784

libcent 0       178.6     180.3     179.6
libamp  0        51.8      49.1      64.5
libcent 1       183.4     184.0     185.2
libamp  1       102.0      99.6     107.7
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       180.6     180.7     179.9
kozaiamp         39.9      39.9      40.6