Orbit Fit and Astrometric record for 13UR17

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: 13UR17    
# Created Mon Dec 18 02:37:58 2017
# Orbit generated from Bernstein formalism
# Fitting   39 observations of   41
# Arc:   2.35y
# First observation: 2013/08/02
#  Last observation: 2015/12/07
Preliminary a, adot, b, bdot, g, gdot:
  -0.000124   0.019808  -0.000004  -0.000617   0.021859   0.000000
# Chi-squared of fit:    15.61 DOF:   72 RMS:  0.11
# Min/Max residuals:    -0.32    0.26
# Exact a, adot, b, bdot, g, gdot:
  1.427114E-05  1.966959E-02 -6.350176E-07 -6.147546E-04  2.179834E-02 -7.191948E-04
# Covariance matrix:
  1.8872E-13  2.2504E-14  4.8460E-15 -1.1246E-14  1.8845E-13  8.3439E-12
  2.2504E-14  2.0621E-13  5.0222E-15 -1.2822E-14  1.8496E-13  9.7500E-12
  4.8460E-15  5.0222E-15  8.6805E-14 -7.4127E-14  9.4883E-15  5.2734E-13
 -1.1246E-14 -1.2822E-14 -7.4127E-14  1.1124E-13 -2.3381E-14 -1.5492E-12
  1.8845E-13  1.8496E-13  9.4883E-15 -2.3381E-14  3.5692E-13  1.7624E-11
  8.3439E-12  9.7500E-12  5.2734E-13 -1.5492E-12  1.7624E-11  1.2155E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.533876   16.879404    0.934379   -0.017697   -0.400561  2456507.024878
# Heliocentric elements and errors
Epoch:              2456500.5000  =  2013/07/27
Mean Anomaly:          237.83783 +/-     0.834
Argument of Peri:        2.57518 +/-     0.819
Long of Asc Node:      142.03179 +/-     0.014
Inclination:             3.11530 +/-     0.001
Eccentricity:         0.07256079 +/-    0.0013
Semi-Major Axis:     44.41316219 +/-    0.0086
Time of Perihelion: 2493186.4873 +/-     250.3
Perihelion:          41.19050800 +/-    0.0599
Aphelion:            47.63581638 +/-    0.0601
Period (y)              295.9891 +/-      0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           44.51048787 +/-    0.0012
Ecliptic Y           12.53260829 +/-    0.0004
Ecliptic Z           -2.02812579 +/-    0.0001
Ecliptic XDOT        -0.00081317 +/-    0.0000
Ecliptic YDOT         0.00233603 +/-    0.0000
Ecliptic ZDOT        -0.00007300 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.28566836 +/-    0.0012
Geocenter to KBO     45.87506033 +/-    0.0013
# Hcoef:  7.73

The following table shows the complete astrometric record for 13UR17. 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 (13UR17) followed by the observatory code and reference code for the source of the astrometry.

2013 08  02.52410  01 06 07.257  +04 17 27.79  24.0r 13UR17    568  C~2NKa      
2013 08  02.56680  01 06 07.210  +04 17 27.23  23.8r 13UR17    568  C~2NKa      
2013 08  30.43961  01 05 08.919  +04 09 55.71  24.5r 13UR17    568  C~2NKa      
2013 08  31.44379  01 05 05.911  +04 09 34.45  24.0r 13UR17    568  C~2NKa      
2013 08  31.48677  01 05 05.791  +04 09 33.52  24.0r 13UR17    568  C~2NKa      
2013 08  31.49523  01 05 05.792  +04 09 33.07  24.4r 13UR17    568  C~2NKa      
2013 08  31.50005  01 05 05.783  +04 09 33.42  24.5r 13UR17    568  C~2NKa      
2013 08  31.50475  01 05 05.726  +04 09 32.96  24.4r 13UR17    568  C~2NKa      
2013 09  04.42370  01 04 53.497  +04 08 07.22  24.5r 13UR17    568  C~2NKa      
2013 09  04.46654  01 04 53.345  +04 08 06.33  24.6r 13UR17    568  C~2NKa      
2013 10  06.40501  01 02 52.263  +03 54 46.89  23.3r 13UR17    568  C~2NKa      
2013 10  06.48768  01 02 51.904  +03 54 44.41  24.3r 13UR17    568  C~2NKa      
2013 10  09.52833  01 02 39.329  +03 53 25.19  23.8r 13UR17    568  C~2NKa      
2013 10  09.53489  01 02 39.280  +03 53 25.10  24.1r 13UR17    568  C~2NKa      
2013 10  31.24669  01 01 11.803  +03 44 29.78  23.8r 13UR17    568  C~2NKa      
2013 10  31.28968  01 01 11.635  +03 44 28.62  24.1r 13UR17    568  C~2NKa      
2013 10  31.33240  01 01 11.469  +03 44 27.55  24.5r 13UR17    568  C~2NKa      
2013 11  01.27294  01 01 07.901  +03 44 06.57  24.1r 13UR17    568  C~2NKa      
2013 11  01.39814  01 01 07.431  +03 44 03.64  24.0r 13UR17    568  C~2NKa      
2013 11  05.45105  01 00 52.427  +03 42 35.59  24.3r 13UR17    568  C~2NKa      
2013 11  29.31322  00 59 40.059  +03 35 53.63  23.8r 13UR17    568  C~2NKa      
2013 12  04.26342  00 59 29.345  +03 35 00.18  24.2r 13UR17    568  C~2NKa      
2013 12  04.31568  00 59 29.232  +03 34 59.58  24.4r 13UR17    568  C~2NKa      
2014 06  27.59391  01 10 08.266  +04 42 17.99  24.6r 13UR17    568  C~2NKa      
2014 06  28.59898  01 10 10.005  +04 42 25.02  24.6r 13UR17    568  C~2NKa      
2014 07  24.55698  01 10 27.848  +04 42 31.67  24.1r 13UR17    568  C~2NKa      
2014 07  27.58768  01 10 26.477  +04 42 11.42  23.7r 13UR17    568  C~2NKa      
2014 08  22.55261  01 09 46.852  +04 36 35.66  23.7r 13UR17    568  C~2NKa      
2014 08  28.41447  01 09 31.607  +04 34 44.03  24.4r 13UR17    568  C~2NKa      
2014 10  23.36792  01 06 00.497  +04 11 51.54  24.0r 13UR17    568  C~2NKa      
2014 10  25.33867  01 05 52.555  +04 11 03.74  26.7r 13UR17    568  C~2NKa      
2014 10  27.31342  01 05 44.674  +04 10 16.75  24.4r 13UR17    568  C~2NKa      
2014 10  27.36433  01 05 44.483  +04 10 15.47  24.0r 13UR17    568  C~2NKa      
2014 10  27.40661  01 05 44.313  +04 10 14.17  24.4r 13UR17    568  C~2NKa      
2014 11  24.23611  01 04 08.447  +04 01 06.84  24.1r 13UR17    568  C~2NKa      
2014 11  24.24000  01 04 08.452  +04 01 06.78  24.1r 13UR17    568  C~2NKa      
2014 11  25.23226  01 04 05.734  +04 00 52.51  24.0r 13UR17    568  C~2NKa      
2014 12  17.26271  01 03 23.056  +03 57 30.90  24.5r 13UR17    568  C~2NKa      
2015 01  17.24366  01 03 28.014  +03 59 45.34  24.3r 13UR17    568  C~2NKa      
2015 01  17.29797  01 03 28.071  +03 59 46.00  24.5r 13UR17    568  C~2NKa      
2015 12  07.38604  01 07 52.918  +04 22 29.69  24.5w 13UR17    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    -0.00       0.00     0.04
  2   0.0001     -0.86     0.01      -0.25    -0.08
  3   0.0764   -979.19     0.12     -84.58     0.06
  4   0.0792  -1028.90     0.04     -87.04     0.11
  5   0.0793  -1030.92     0.21     -87.21     0.02
  6   0.0793  -1031.08 (   0.49)    -87.63 (  -0.38)
  7   0.0793  -1031.07 (   0.74)    -87.26 (   0.01)
  8   0.0793  -1032.03     0.02     -87.36    -0.08
  9   0.0901  -1233.87     0.04     -96.70    -0.05
 10   0.0902  -1236.31    -0.09     -96.65     0.08
 11   0.1776  -3216.32     0.05    -142.61     0.16
 12   0.1779  -3222.23    -0.23    -142.84    -0.06
 13   0.1862  -3426.46    -0.05    -144.02     0.03
 14   0.1862  -3427.17    -0.32    -143.82     0.22
 15   0.2456  -4842.19     0.12    -137.03     0.16
 16   0.2458  -4844.96     0.02    -137.14    -0.01
 17   0.2459  -4847.67    -0.02    -137.18    -0.10
 18   0.2485  -4905.07    -0.09    -136.10     0.07
 19   0.2488  -4912.69     0.02    -136.11    -0.13
 20   0.2599  -5154.02    -0.14    -131.39    -0.07
 21   0.3252  -6309.55     0.11     -87.35    -0.05
 22   0.3388  -6478.35     0.17     -75.19    -0.10
 23   0.3389  -6480.14     0.06     -75.10    -0.16
 24   0.9009   3900.39    -0.02       4.32    -0.20
 25   0.9037   3927.12     0.04       0.93     0.03
 26   0.9748   4176.44     0.12     -94.40     0.01
 27   0.9831   4149.77    -0.02    -105.33    -0.00
 28   1.0542   3473.93    -0.14    -190.47     0.26
 29   1.0702   3220.59     0.04    -206.94     0.09
 30   1.2234   -221.82    -0.10    -272.19    -0.19
 31   1.2288   -349.88    -0.09    -271.01    -0.11
 32   1.2342   -476.79    -0.08    -269.42     0.15
 33   1.2343   -479.92     0.09    -269.52    -0.01
 34   1.2344   -482.77    -0.01    -269.75    -0.29
 35   1.3106  -2017.45    -0.08    -227.57     0.01
 36   1.3107  -2017.41     0.14    -227.65    -0.08
 37   1.3134  -2060.45    -0.01    -225.29     0.08
 38   1.3737  -2727.72     0.03    -167.37     0.03
 39   1.4585  -2607.73     0.11     -71.52    -0.04
 40   1.4587  -2606.69    -0.15     -71.23     0.06
 41   2.3460   1576.09     0.06    -323.76     0.12

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.

13UR17    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.633    44.654    44.613
ecceobj         0.067     0.071     0.064
incobj          3.110     3.109     3.110
qmin           40.250    40.078    40.371
qmax           48.743    48.894    48.533
amean          44.375    44.397    44.356
amin           44.015    44.042    44.006
amax           44.748    44.777    44.723
emean           0.074     0.077     0.070
emin            0.058     0.063     0.055
emax            0.089     0.093     0.085
imean           2.419     2.419     2.418
imin            1.746     1.732     1.756
imax            3.117     3.125     3.111
excite_mean     0.085     0.088     0.082
fracstop        1.000     1.000     1.000
cjmean          3.097     3.097     3.098

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       185.5     185.0     186.1
kozaiamp        180.0     180.0     179.9