Orbit Fit and Astrometric record for 13UZ17

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: 13UZ17    
# Created Mon Dec 18 02:37:58 2017
# Orbit generated from Bernstein formalism
# Fitting   37 observations of   37
# Arc:   2.35y
# First observation: 2013/08/02
#  Last observation: 2015/12/07
Preliminary a, adot, b, bdot, g, gdot:
  -0.000162   0.027388   0.000004   0.003425   0.025578   0.000000
# Chi-squared of fit:     8.95 DOF:   68 RMS:  0.09
# Min/Max residuals:    -0.25    0.23
# Exact a, adot, b, bdot, g, gdot:
  1.678622E-05  2.723638E-02  2.439442E-06  3.426003E-03  2.551364E-02  2.200900E-03
# Covariance matrix:
  1.3520E-13 -2.3650E-14 -1.2023E-15  7.7519E-15  9.5601E-14  1.2577E-12
 -2.3650E-14  3.9820E-13 -1.2751E-14  6.3578E-14  1.7644E-13  1.0026E-11
 -1.2023E-15 -1.2751E-14  7.5522E-14 -6.7147E-14 -7.1445E-15 -4.5425E-13
  7.7519E-15  6.3578E-14 -6.7147E-14  1.2980E-13  3.7892E-14  2.2591E-12
  9.5601E-14  1.7644E-13 -7.1445E-15  3.7892E-14  2.0080E-13  6.0209E-12
  1.2577E-12  1.0026E-11 -4.5425E-13  2.2591E-12  6.0209E-12  3.5613E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.766299   17.650499    0.939637   -0.005165   -0.388428  2456507.032638
# Heliocentric elements and errors
Epoch:              2456500.5000  =  2013/07/27
Mean Anomaly:           14.50809 +/-     0.159
Argument of Peri:      332.93519 +/-     0.236
Long of Asc Node:       22.32797 +/-     0.001
Inclination:             7.17811 +/-     0.001
Eccentricity:         0.17734512 +/-    0.0003
Semi-Major Axis:     47.64984689 +/-    0.0075
Time of Perihelion: 2451658.7938 +/-      52.9
Perihelion:          39.19937919 +/-    0.0167
Aphelion:            56.10031459 +/-    0.0179
Period (y)              328.9277 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           38.00108028 +/-    0.0007
Ecliptic Y           11.10868531 +/-    0.0002
Ecliptic Z           -0.52405457 +/-    0.0000
Ecliptic XDOT        -0.00066270 +/-    0.0000
Ecliptic YDOT         0.00285740 +/-    0.0000
Ecliptic ZDOT         0.00036459 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.59494444 +/-    0.0006
Geocenter to KBO     39.19472860 +/-    0.0007
# Hcoef:  8.01

The following table shows the complete astrometric record for 13UZ17. 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 (13UZ17) followed by the observatory code and reference code for the source of the astrometry.

2013 08  02.53186  01 06 16.459  +06 13 08.34  23.9r 13UZ17    568  C~2NKb      
2013 08  02.57457  01 06 16.404  +06 13 08.08  23.9r 13UZ17    568  C~2NKb      
2013 08  30.44895  01 05 10.415  +06 06 52.04  23.8r 13UZ17    568  C~2NKb      
2013 08  31.45170  01 05 06.968  +06 06 31.92  23.8r 13UZ17    568  C~2NKb      
2013 08  31.51259  01 05 06.754  +06 06 30.83  24.1r 13UZ17    568  C~2NKb      
2013 08  31.51726  01 05 06.742  +06 06 30.46  24.3r 13UZ17    568  C~2NKb      
2013 09  04.43153  01 04 52.731  +06 05 09.70  24.1r 13UZ17    568  C~2NKb      
2013 09  04.47439  01 04 52.577  +06 05 08.56  24.4r 13UZ17    568  C~2NKb      
2013 09  04.50640  01 04 52.430  +06 05 08.09  24.2r 13UZ17    568  C~2NKb      
2013 10  06.41277  01 02 32.992  +05 51 41.31  23.7r 13UZ17    568  C~2NKb      
2013 10  06.50014  01 02 32.575  +05 51 39.00  24.0r 13UZ17    568  C~2NKb      
2013 10  06.50554  01 02 32.540  +05 51 38.82  23.8r 13UZ17    568  C~2NKb      
2013 10  06.51103  01 02 32.519  +05 51 38.72  23.7r 13UZ17    568  C~2NKb      
2013 10  06.51584  01 02 32.496  +05 51 38.57  23.8r 13UZ17    568  C~2NKb      
2013 10  31.25446  01 00 37.161  +05 40 41.54  23.5r 13UZ17    568  C~2NKb      
2013 10  31.29744  01 00 36.974  +05 40 40.56  23.9r 13UZ17    568  C~2NKb      
2013 10  31.34016  01 00 36.777  +05 40 39.50  24.0r 13UZ17    568  C~2NKb      
2013 11  01.28119  01 00 32.690  +05 40 16.49  23.5r 13UZ17    568  C~2NKb      
2013 11  01.40856  01 00 32.115  +05 40 13.45  23.7r 13UZ17    568  C~2NKb      
2013 11  05.45881  01 00 14.910  +05 38 37.36  23.8r 13UZ17    568  C~2NKb      
2013 11  29.32101  00 58 52.362  +05 31 13.64  23.7r 13UZ17    568  C~2NKb      
2013 11  29.32791  00 58 52.345  +05 31 13.25  23.5r 13UZ17    568  C~2NKb      
2013 12  04.27126  00 58 40.308  +05 30 13.73  23.7r 13UZ17    568  C~2NKb      
2013 12  04.32344  00 58 40.195  +05 30 13.10  24.0r 13UZ17    568  C~2NKb      
2014 06  27.60171  01 11 26.656  +06 56 49.52  23.9r 13UZ17    568  C~2NKb      
2014 06  28.60677  01 11 28.809  +06 57 03.81  24.1r 13UZ17    568  C~2NKb      
2014 07  24.56479  01 11 52.795  +06 59 58.84  24.0r 13UZ17    568  C~2NKb      
2014 07  27.59560  01 11 51.556  +06 59 54.94  23.8r 13UZ17    568  C~2NKb      
2014 08  22.56814  01 11 08.124  +06 56 02.96  23.6r 13UZ17    568  C~2NKb      
2014 08  22.58822  01 11 08.078  +06 56 02.94  23.8r 13UZ17    568  C~2NKb      
2014 08  28.43091  01 10 50.872  +06 54 26.05  23.9r 13UZ17    568  C~2NKb      
2014 10  23.35237  01 06 48.531  +06 31 27.99  23.6r 13UZ17    568  C~2NKb      
2014 10  26.44781  01 06 34.177  +06 30 07.04  23.7r 13UZ17    568  C~2NKc      
2014 10  27.39107  01 06 29.857  +06 29 42.78  23.9r 13UZ17    568  C~2NKc      
2015 01  17.30307  01 03 56.421  +06 17 44.08  23.7r 13UZ17    568  C~2NKc      
2015 08  20.51903  01 16 45.757  +07 42 51.44  23.9r 13UZ17    568  C~2NKc      
2015 12  07.38190  01 09 35.492  +07 03 10.23  24.1w 13UZ17    568  C~2NKc      

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     0.02       0.00    -0.07
  2   0.0001     -0.86     0.04       0.07    -0.05
  3   0.0764  -1054.00     0.13      27.95     0.09
  4   0.0792  -1109.20    -0.13      28.98    -0.08
  5   0.0793  -1112.57    -0.06      29.19     0.03
  6   0.0794  -1112.88    -0.10      28.92    -0.25
  7   0.0901  -1336.86     0.07      34.08     0.10
  8   0.0902  -1339.42     0.10      33.90    -0.15
  9   0.0903  -1341.63    -0.17      34.30     0.19
 10   0.1776  -3572.59    -0.01      84.30    -0.04
 11   0.1779  -3579.22     0.13      84.55    -0.00
 12   0.1779  -3579.77    -0.01      84.58     0.02
 13   0.1779  -3580.10     0.09      84.61     0.03
 14   0.1779  -3580.48     0.09      84.60     0.01
 15   0.2456  -5423.00    -0.10     137.48    -0.04
 16   0.2458  -5425.96    -0.01     137.64     0.00
 17   0.2459  -5429.08    -0.10     137.79     0.03
 18   0.2485  -5494.29     0.00     139.95    -0.04
 19   0.2488  -5503.39    -0.14     140.44     0.07
 20   0.2599  -5777.63    -0.05     150.26    -0.02
 21   0.3252  -7087.16     0.19     213.94     0.23
 22   0.3252  -7087.54     0.10     213.68    -0.05
 23   0.3388  -7276.56    -0.07     227.83     0.04
 24   0.3389  -7278.36     0.01     227.89    -0.06
 25   0.9009   5272.82    -0.01     667.56    -0.03
 26   0.9037   5307.92    -0.01     668.64     0.01
 27   0.9748   5705.02     0.11     695.38    -0.06
 28   0.9831   5686.46     0.04     698.75     0.05
 29   1.0542   4999.64    -0.15     729.05    -0.08
 30   1.0542   4999.00     0.10     729.30     0.12
 31   1.0702   4725.03    -0.07     736.76    -0.07
 32   1.2233    861.18     0.02     834.39     0.09
 33   1.2318    632.55    -0.00     841.08    -0.01
 34   1.2344    563.78    -0.01     843.19     0.05
 35   1.4586  -1824.65    -0.05    1052.12    -0.03
 36   2.0479  10720.22    -0.02    1433.85    -0.02
 37   2.3459   3885.24     0.04    1647.80    -0.04

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.

13UZ17    quality flag:3

Type:           2:1E      2:1E      2:1E

axisobj        47.958    47.985    47.931
ecceobj         0.183     0.184     0.182
incobj          7.162     7.162     7.162
qmin           38.549    38.338    38.319
qmax           57.952    58.033    58.176
amean          47.797    47.797    47.798
amin           47.173    47.178    47.143
amax           48.514    48.469    48.533
emean           0.175     0.174     0.178
emin            0.152     0.149     0.157
emax            0.195     0.199     0.200
imean           7.531     7.609     7.099
imin            7.086     7.014     6.568
imax            8.194     8.547     7.738
excite_mean     0.218     0.219     0.216
fracstop        1.000     1.000     1.000
cjmean          3.089     3.089     3.090

libcent 0       180.2     179.5     179.5
libamp  0       160.2     154.6     164.9
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       154.9     181.1     172.5
kozaiamp        179.9     180.0     180.0