Orbit Fit and Astrometric record for 13UO17

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: 13UO17    
# Created Sat Dec 16 02:37:58 2017
# Orbit generated from Bernstein formalism
# Fitting   47 observations of   47
# Arc:   4.08y
# First observation: 2013/08/02
#  Last observation: 2017/08/30
Preliminary a, adot, b, bdot, g, gdot:
  -0.000250   0.037032   0.000020  -0.001956   0.029603   0.000000
# Chi-squared of fit:    14.50 DOF:   88 RMS:  0.10
# Min/Max residuals:    -0.40    0.21
# Exact a, adot, b, bdot, g, gdot:
  1.964347E-05  3.602581E-02 -1.115757E-06 -1.901913E-03  2.910479E-02 -3.927006E-03
# Covariance matrix:
  1.1872E-13 -5.7724E-14  4.3905E-17  1.4774E-15  5.1291E-14 -2.0066E-13
 -5.7724E-14  1.5844E-13  4.3703E-15 -8.1709E-15  5.5379E-14  1.0246E-12
  4.3905E-17  4.3703E-15  5.8312E-14 -2.6786E-14  3.1082E-15  3.4436E-14
  1.4774E-15 -8.1709E-15 -2.6786E-14  2.5832E-14 -3.9289E-15 -6.3223E-14
  5.1291E-14  5.5379E-14  3.1082E-15 -3.9289E-15  1.0062E-13  4.7412E-13
 -2.0066E-13  1.0246E-12  3.4436E-14 -6.3223E-14  4.7412E-13  7.9168E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.296157   16.497569    0.931686   -0.016284   -0.406844  2456507.024878
# Heliocentric elements and errors
Epoch:              2456500.5000  =  2013/07/27
Mean Anomaly:          348.38182 +/-     0.006
Argument of Peri:      244.52259 +/-     0.015
Long of Asc Node:      158.72277 +/-     0.002
Inclination:             3.83311 +/-     0.000
Eccentricity:         0.39197059 +/-    0.0001
Semi-Major Axis:     55.28453383 +/-    0.0046
Time of Perihelion: 2461346.0106 +/-       2.3
Perihelion:          33.61462260 +/-    0.0042
Aphelion:            76.95444505 +/-    0.0071
Period (y)              411.0680 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           33.57240208 +/-    0.0004
Ecliptic Y            8.97458860 +/-    0.0001
Ecliptic Z           -1.37656526 +/-    0.0000
Ecliptic XDOT        -0.00132938 +/-    0.0000
Ecliptic YDOT         0.00314171 +/-    0.0000
Ecliptic ZDOT        -0.00016383 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.77850419 +/-    0.0003
Geocenter to KBO     34.35859978 +/-    0.0004
# Hcoef:  8.33

The following table shows the complete astrometric record for 13UO17. 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 (13UO17) followed by the observatory code and reference code for the source of the astrometry.

2013 08  02.52410  01 04 20.541  +04 21 53.85  23.7r 13UO17    568  C~2NKZ      
2013 08  02.56680  01 04 20.487  +04 21 53.32  23.7r 13UO17    568  C~2NKZ      
2013 08  30.43961  01 03 11.315  +04 12 34.25  23.4r 13UO17    568  C~2NKZ      
2013 08  31.44379  01 03 07.626  +04 12 07.38  23.8r 13UO17    568  C~2NKZ      
2013 08  31.48677  01 03 07.445  +04 12 06.29  23.3r 13UO17    568  C~2NKZ      
2013 08  31.49523  01 03 07.409  +04 12 06.02  23.5r 13UO17    568  C~2NKZ      
2013 08  31.50005  01 03 07.406  +04 12 05.90  23.4r 13UO17    568  C~2NKZ      
2013 08  31.50475  01 03 07.375  +04 12 05.77  23.4r 13UO17    568  C~2NKZ      
2013 10  06.39713  01 00 20.699  +03 53 12.62  23.5r 13UO17    568  C~2NKZ      
2013 10  06.47088  01 00 20.308  +03 53 10.17  23.2r 13UO17    568  C~2NKZ      
2013 10  06.47992  01 00 20.273  +03 53 09.71  23.6r 13UO17    568  C~2NKZ      
2013 10  09.52057  01 00 04.473  +03 51 28.01  23.7r 13UO17    568  C~2NKZ      
2013 10  31.23884  00 58 15.302  +03 40 02.53  23.9r 13UO17    568  C~2NKZ      
2013 10  31.28183  00 58 15.097  +03 40 01.29  23.7r 13UO17    568  C~2NKZ      
2013 10  31.32461  00 58 14.881  +03 40 00.12  23.7r 13UO17    568  C~2NKZ      
2013 11  01.26510  00 58 10.493  +03 39 33.20  23.6r 13UO17    568  C~2NKZ      
2013 11  01.38800  00 58 09.901  +03 39 29.76  23.8r 13UO17    568  C~2NKZ      
2013 11  05.38795  00 57 51.673  +03 37 39.31  23.7r 13UO17    568  C~2NKZ      
2013 12  04.25494  00 56 12.284  +03 28 14.49        13UO17    568  C~2NKZ      
2013 12  05.24921  00 56 10.115  +03 28 03.92  23.7r 13UO17    568  C~2NKZ      
2014 07  24.55698  01 12 16.647  +05 04 33.19  23.7r 13UO17    568  C~2NKZ      
2014 07  27.58768  01 12 16.080  +05 04 12.71  24.0r 13UO17    568  C~2NKZ      
2014 08  22.55650  01 11 33.579  +04 57 38.13  23.5r 13UO17    568  C~2NKZ      
2014 08  22.56426  01 11 33.557  +04 57 38.08  23.8r 13UO17    568  C~2NKZ      
2014 08  28.41844  01 11 15.432  +04 55 20.35  23.6r 13UO17    568  C~2NKa      
2014 08  28.42620  01 11 15.409  +04 55 20.28  23.4r 13UO17    568  C~2NKa      
2014 08  29.52684  01 11 11.677  +04 54 52.66  23.4r 13UO17    568  C~2NKa      
2014 08  29.53615  01 11 11.658  +04 54 52.09  25.4u 13UO17    568  C~2NKa      
2014 08  29.57460  01 11 11.500  +04 54 51.09  24.6u 13UO17    568  C~2NKa      
2014 08  29.60958  01 11 11.382  +04 54 50.46  25.7u 13UO17    568  C~2NKa      
2014 08  29.61463  01 11 11.367  +04 54 50.53  23.6r 13UO17    568  C~2NKa      
2014 10  23.36016  01 06 52.454  +04 26 13.09  23.2r 13UO17    568  C~2NKa      
2014 10  26.45694  01 06 36.800  +04 24 36.63  23.0r 13UO17    568  C~2NKa      
2014 10  27.39884  01 06 32.074  +04 24 08.15  23.5r 13UO17    568  C~2NKa      
2014 11  24.23611  01 04 32.923  +04 12 29.67  24.0r 13UO17    568  C~2NKa      
2014 11  24.24000  01 04 32.905  +04 12 29.65  23.6r 13UO17    568  C~2NKa      
2014 11  25.23226  01 04 29.619  +04 12 11.67  23.8r 13UO17    568  C~2NKa      
2014 11  25.23617  01 04 29.609  +04 12 11.71  23.7r 13UO17    568  C~2NKa      
2014 12  17.26271  01 03 40.039  +04 08 09.20  24.4r 13UO17    568  C~2NKa      
2015 01  17.24366  01 03 57.314  +04 11 46.53  23.8r 13UO17    568  C~2NKa      
2015 01  17.29797  01 03 57.431  +04 11 47.51  23.7r 13UO17    568  C~2NKa      
2015 08  20.51066  01 19 39.162  +05 40 03.30  23.5r 13UO17    568  C~2NKa      
2015 12  07.38604  01 11 52.438  +04 51 01.37        13UO17    568  C~2NKa      
2017 07  24.60568  01 36 10.610  +07 07 17.18        13UO17    568  C~2NKa      
2017 08  25.50368  01 35 38.036  +07 01 00.94  23.9w 13UO17    568  C~2NKa      
2017 08  30.44591  01 35 24.027  +06 59 14.14  22.9w 13UO17    568  C~2NKa      
2017 08  30.49268  01 35 23.879  +06 59 13.03  23.5w 13UO17    568  C~2NKa      

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    -0.01       0.00     0.02
  2   0.0001     -0.95    -0.00      -0.18     0.02
  3   0.0764  -1170.83     0.00    -120.74    -0.06
  4   0.0792  -1232.10     0.10    -124.43    -0.05
  5   0.0793  -1235.01    -0.11    -124.40     0.11
  6   0.0793  -1235.62    -0.18    -124.45     0.09
  7   0.0793  -1235.70     0.04    -124.54     0.01
  8   0.0793  -1236.18    -0.14    -124.48     0.08
  9   0.1776  -3974.43     0.02    -215.25     0.06
 10   0.1778  -3980.78     0.02    -215.27     0.09
 11   0.1778  -3981.44     0.13    -215.50    -0.13
 12   0.1862  -4238.92    -0.04    -218.68     0.17
 13   0.2456  -6012.01     0.02    -224.19     0.04
 14   0.2457  -6015.32     0.03    -224.15     0.03
 15   0.2459  -6018.76    -0.10    -223.99     0.14
 16   0.2484  -6089.81     0.05    -223.61     0.01
 17   0.2488  -6099.32    -0.03    -223.38     0.09
 18   0.2597  -6393.95     0.07    -220.49    -0.11
 19   0.3388  -7986.65     0.05    -169.68    -0.10
 20   0.3415  -8020.74     0.08    -166.94     0.14
 21   0.9748   7558.91     0.07    -347.41    -0.05
 22   0.9831   7543.27     0.09    -363.15    -0.19
 23   1.0542   6805.00     0.02    -486.84    -0.04
 24   1.0542   6804.68     0.08    -486.76     0.07
 25   1.0702   6501.47    -0.03    -511.17    -0.06
 26   1.0702   6501.13     0.06    -511.10     0.03
 27   1.0732   6438.98     0.01    -515.44    -0.01
 28   1.0733   6438.50     0.07    -515.85    -0.40
 29   1.0734   6435.94    -0.24    -515.88    -0.30
 30   1.0735   6434.06    -0.07    -515.79    -0.09
 31   1.0735   6433.88     0.04    -515.64     0.07
 32   1.2234   2198.71     0.08    -628.63     0.02
 33   1.2318   1945.48     0.09    -628.40    -0.22
 34   1.2344   1869.28    -0.17    -627.73     0.21
 35   1.3106    -44.66     0.02    -592.12    -0.08
 36   1.3107    -44.92    -0.03    -592.04    -0.00
 37   1.3134    -97.21    -0.04    -589.85     0.01
 38   1.3134    -97.34     0.05    -589.76     0.09
 39   1.3737   -875.29     0.02    -530.10    -0.05
 40   1.4585   -553.35    -0.04    -428.20     0.05
 41   1.4587   -551.35    -0.07    -427.97     0.09
 42   2.0479  14502.54     0.06    -878.60     0.04
 43   2.3460   6915.03    -0.06    -961.23    -0.01
 44   3.9756  30359.70     0.02   -1552.68     0.03
 45   4.0629  29757.61    -0.02   -1724.42    -0.06
 46   4.0764  29519.51     0.01   -1746.55     0.12
 47   4.0766  29517.01    -0.02   -1746.77     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.

13UO17    quality flag:2

Type:         5:2EEE    5:2EEE  SCATNEAR

axisobj        55.690    55.702    55.678
ecceobj         0.396     0.396     0.395
incobj          3.825     3.825     3.825
qmin           33.007    33.048    32.491
qmax           79.686    79.829    84.539
amean          55.465    55.465    55.846
amin           54.446    54.462    54.413
amax           56.650    56.725    58.841
emean           0.394     0.394     0.399
emin            0.379     0.380     0.374
emax            0.407     0.408     0.437
imean           3.509     3.398     4.047
imin            2.907     2.928     2.878
imax            4.265     3.933     5.864
excite_mean     0.398     0.398     0.406
fracstop        1.000     1.000     1.000
cjmean          3.033     3.033     3.029

libcent 0       181.1     179.6    -180.0
libamp  0       167.4     164.2    -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       180.7     195.8     177.2
kozaiamp        180.0     180.0     180.0