Orbit Fit and Astrometric record for 13UW17

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: 13UW17    
# Created Mon Dec 18 02:37:58 2017
# Orbit generated from Bernstein formalism
# Fitting   53 observations of   53
# Arc:   4.08y
# First observation: 2013/08/02
#  Last observation: 2017/08/30
Preliminary a, adot, b, bdot, g, gdot:
  -0.000136   0.020471  -0.000002   0.000158   0.022060   0.000000
# Chi-squared of fit:    23.63 DOF:  100 RMS:  0.12
# Min/Max residuals:    -0.45    0.31
# Exact a, adot, b, bdot, g, gdot:
  1.376527E-05  2.029636E-02  8.392207E-07  1.571726E-04  2.199625E-02  2.802573E-04
# Covariance matrix:
  1.2478E-13 -4.4523E-14  8.3124E-16 -1.3314E-16  6.2438E-14 -1.7982E-13
 -4.4523E-14  1.1936E-13  2.0900E-16  5.1847E-16  5.4795E-14  1.4171E-12
  8.3124E-16  2.0900E-16  5.7371E-14 -2.7473E-14  1.0989E-15  4.1762E-15
 -1.3314E-16  5.1847E-16 -2.7473E-14  2.5111E-14  2.5719E-16  7.7487E-15
  6.2438E-14  5.4795E-14  1.0989E-15  2.5719E-16  1.1323E-13  9.0994E-13
 -1.7982E-13  1.4171E-12  4.1762E-15  7.7487E-15  9.0994E-13  2.1397E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.900687   17.563402    0.939072   -0.012900   -0.389616  2456507.028758
# Heliocentric elements and errors
Epoch:              2456500.5000  =  2013/07/27
Mean Anomaly:          223.13489 +/-     0.691
Argument of Peri:       59.95901 +/-     0.690
Long of Asc Node:       94.30678 +/-     0.013
Inclination:             1.92669 +/-     0.000
Eccentricity:         0.01336746 +/-    0.0002
Semi-Major Axis:     45.41554850 +/-    0.0024
Time of Perihelion: 2499001.1441 +/-     214.4
Perihelion:          44.80845811 +/-    0.0078
Aphelion:            46.02263888 +/-    0.0078
Period (y)              306.0660 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           43.97394254 +/-    0.0007
Ecliptic Y           12.93664059 +/-    0.0002
Ecliptic Z           -1.50777487 +/-    0.0000
Ecliptic XDOT        -0.00073470 +/-    0.0000
Ecliptic YDOT         0.00241839 +/-    0.0000
Ecliptic ZDOT         0.00001854 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.86215954 +/-    0.0006
Geocenter to KBO     45.46228500 +/-    0.0007
# Hcoef:  7.72

The following table shows the complete astrometric record for 13UW17. 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 (13UW17) followed by the observatory code and reference code for the source of the astrometry.

2013 08  02.52798  01 07 41.289  +05 08 13.16  24.0r 13UW17    568  C~2NKb      
2013 08  02.57069  01 07 41.226  +05 08 12.85  24.0r 13UW17    568  C~2NKb      
2013 08  30.44360  01 06 43.203  +05 01 16.76  24.0r 13UW17    568  C~2NKb      
2013 08  31.44775  01 06 40.204  +05 00 56.45  24.0r 13UW17    568  C~2NKb      
2013 08  31.49065  01 06 40.037  +05 00 55.75  24.0r 13UW17    568  C~2NKb      
2013 08  31.50871  01 06 40.020  +05 00 55.40  26.7r 13UW17    568  C~2NKb      
2013 09  04.42758  01 06 27.773  +04 59 33.43  24.0r 13UW17    568  C~2NKb      
2013 09  04.50244  01 06 27.509  +04 59 31.93  23.9r 13UW17    568  C~2NKb      
2013 10  06.40889  01 04 25.754  +04 46 34.46  23.8r 13UW17    568  C~2NKb      
2013 10  06.49158  01 04 25.382  +04 46 32.35  24.0r 13UW17    568  C~2NKb      
2013 10  06.49617  01 04 25.389  +04 46 32.12  23.9r 13UW17    568  C~2NKb      
2013 10  31.25056  01 02 44.184  +04 36 19.82  24.4r 13UW17    568  C~2NKb      
2013 10  31.29356  01 02 44.027  +04 36 18.82  24.3r 13UW17    568  C~2NKb      
2013 10  31.33628  01 02 43.859  +04 36 17.98  24.1r 13UW17    568  C~2NKb      
2013 11  01.27683  01 02 40.259  +04 35 56.50  23.8r 13UW17    568  C~2NKb      
2013 11  01.40318  01 02 39.772  +04 35 53.79  24.5r 13UW17    568  C~2NKb      
2013 11  05.45493  01 02 24.575  +04 34 25.02  24.2r 13UW17    568  C~2NKb      
2013 11  29.31710  01 01 11.023  +04 27 33.32  24.4r 13UW17    568  C~2NKb      
2013 12  04.26738  01 01 00.065  +04 26 37.81  24.4r 13UW17    568  C~2NKb      
2013 12  04.31956  01 00 59.969  +04 26 37.02  24.1r 13UW17    568  C~2NKb      
2014 06  27.59782  01 11 44.897  +05 35 15.33  24.0r 13UW17    568  C~2NKb      
2014 06  28.60286  01 11 46.695  +05 35 23.63  24.3r 13UW17    568  C~2NKb      
2014 07  24.56087  01 12 05.726  +05 36 13.19  24.2r 13UW17    568  C~2NKb      
2014 07  27.59171  01 12 04.452  +05 35 58.06  24.1r 13UW17    568  C~2NKb      
2014 08  22.56426  01 11 25.368  +05 30 59.50  25.2r 13UW17    568  C~2NKb      
2014 08  28.42620  01 11 10.124  +05 29 15.39  23.9r 13UW17    568  C~2NKb      
2014 08  29.52684  01 11 07.030  +05 28 54.39  24.0r 13UW17    568  C~2NKb      
2014 08  29.61463  01 11 06.770  +05 28 52.74  24.1r 13UW17    568  C~2NKb      
2014 10  23.28255  01 07 38.089  +05 07 00.98  24.0r 13UW17    568  C~2NKb      
2014 10  23.33619  01 07 37.865  +05 06 59.64  24.0r 13UW17    568  C~2NKb      
2014 10  23.36016  01 07 37.781  +05 06 59.23  23.9r 13UW17    568  C~2NKb      
2014 10  23.38966  01 07 37.639  +05 06 58.33  23.9r 13UW17    568  C~2NKb      
2014 10  23.39470  01 07 37.622  +05 06 58.22  23.9r 13UW17    568  C~2NKb      
2014 10  25.25994  01 07 30.032  +05 06 13.00  24.2r 13UW17    568  C~2NKb      
2014 10  25.36233  01 07 29.610  +05 06 10.22  24.8r 13UW17    568  C~2NKb      
2014 10  25.46195  01 07 29.198  +05 06 08.18  23.9r 13UW17    568  C~2NKb      
2014 10  27.24998  01 07 22.006  +05 05 25.36  23.9r 13UW17    568  C~2NKb      
2014 10  27.30820  01 07 21.767  +05 05 24.02  24.1r 13UW17    568  C~2NKb      
2014 10  27.37469  01 07 21.497  +05 05 22.30  23.9r 13UW17    568  C~2NKb      
2014 10  27.39884  01 07 21.395  +05 05 21.90  24.2r 13UW17    568  C~2NKb      
2014 10  29.26294  01 07 13.977  +05 04 37.82  24.0r 13UW17    568  C~2NKb      
2014 11  24.24000  01 05 44.181  +04 56 06.03  25.1r 13UW17    568  C~2NKb      
2014 12  17.25485  01 04 57.764  +04 52 15.75  24.6r 13UW17    568  C~2NKb      
2014 12  17.25877  01 04 57.748  +04 52 15.99  24.2r 13UW17    568  C~2NKb      
2015 01  17.23854  01 05 01.791  +04 54 08.74  24.6r 13UW17    568  C~2NKb      
2015 08  20.51066  01 15 50.627  +05 58 37.99  24.2r 13UW17    568  C~2NKb      
2015 10  15.30155  01 12 33.893  +05 37 45.99  23.8r 13UW17    568  C~2NKb      
2015 10  15.30564  01 12 33.872  +05 37 45.85  23.7r 13UW17    568  C~2NKb      
2015 12  07.37779  01 09 32.122  +05 20 33.38  24.4w 13UW17    568  C~2NKb      
2017 07  24.60098  01 24 59.181  +06 56 01.30  24.4w 13UW17    568  C~2NKb      
2017 08  25.51775  01 24 18.784  +06 50 48.28  24.2w 13UW17    568  C~2NKb      
2017 08  30.45989  01 24 06.077  +06 49 23.24  24.6w 13UW17    568  C~2NKb      
2017 08  30.50665  01 24 05.953  +06 49 22.32  24.1w 13UW17    568  C~2NKb      

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     0.17       0.00    -0.15
  2   0.0001     -0.99     0.02       0.07    -0.00
  3   0.0764   -961.06    -0.12     -54.40     0.09
  4   0.0792  -1010.23    -0.04     -56.10    -0.04
  5   0.0793  -1012.81    -0.45     -55.80     0.31
  6   0.0793  -1013.18     0.09     -56.02     0.10
  7   0.0901  -1213.61     0.19     -62.05    -0.12
  8   0.0903  -1217.83    -0.00     -61.93     0.07
  9   0.1776  -3196.75     0.08     -86.28     0.02
 10   0.1779  -3202.69    -0.20     -86.11     0.17
 11   0.1779  -3202.69     0.12     -86.36    -0.09
 12   0.2456  -4835.46    -0.12     -73.94     0.09
 13   0.2458  -4838.01     0.03     -73.97     0.00
 14   0.2459  -4840.66     0.08     -73.79     0.12
 15   0.2485  -4898.64     0.07     -73.05    -0.13
 16   0.2488  -4906.41     0.19     -72.76    -0.04
 17   0.2599  -5150.45     0.06     -67.86     0.02
 18   0.3252  -6325.04    -0.14     -27.22    -0.35
 19   0.3388  -6497.85    -0.10     -15.73     0.30
 20   0.3389  -6499.48    -0.00     -15.91    -0.02
 21   0.9009   3982.13     0.06     117.98     0.06
 22   0.9037   4010.13     0.02     115.48    -0.10
 23   0.9748   4291.92     0.08      53.60    -0.07
 24   0.9831   4268.58    -0.05      46.81     0.22
 25   1.0542   3615.20     0.01      -8.17    -0.04
 26   1.0702   3365.04    -0.04     -18.14     0.18
 27   1.0732   3314.31     0.01     -20.04     0.02
 28   1.0735   3310.09    -0.02     -20.09     0.07
 29   1.2231    -71.69    -0.06     -48.54    -0.05
 30   1.2233    -75.30    -0.08     -48.50    -0.07
 31   1.2234    -76.61     0.20     -48.40     0.00
 32   1.2234    -78.92    -0.13     -48.43    -0.06
 33   1.2235    -79.19    -0.07     -48.43    -0.07
 34   1.2286   -201.27    -0.02     -47.06    -0.01
 35   1.2288   -208.16    -0.13     -47.23    -0.31
 36   1.2291   -214.62    -0.00     -46.78     0.03
 37   1.2340   -330.29     0.04     -45.44    -0.02
 38   1.2342   -334.10     0.03     -45.32     0.02
 39   1.2344   -338.48    -0.00     -45.38    -0.12
 40   1.2344   -340.05     0.02     -45.17     0.06
 41   1.2395   -459.31    -0.02     -43.71    -0.12
 42   1.3106  -1894.95     0.30      -5.37    -0.10
 43   1.3737  -2624.12     0.06      46.49    -0.24
 44   1.3737  -2624.25     0.00      46.80     0.07
 45   1.4585  -2525.35    -0.06     127.96     0.00
 46   2.0479   7910.78    -0.01      28.60     0.04
 47   2.2006   4716.40     0.01     -19.90     0.02
 48   2.2006   4716.06    -0.05     -19.91     0.01
 49   2.3459   1812.71    -0.04      54.75     0.05
 50   3.9756  16814.71     0.08     149.76     0.04
 51   4.0629  16135.44    -0.01      83.91     0.15
 52   4.0765  15926.87    -0.06      75.75     0.03
 53   4.0766  15924.80     0.00      75.59    -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.

13UW17    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        45.657    45.664    45.650
ecceobj         0.008     0.008     0.008
incobj          1.927     1.927     1.927
qmin           43.935    43.944    43.912
qmax           46.996    46.978    46.992
amean          45.378    45.385    45.371
amin           45.021    45.041    45.022
amax           45.730    45.740    45.732
emean           0.015     0.015     0.015
emin            0.001     0.001     0.002
emax            0.028     0.028     0.028
imean           0.424     0.423     0.424
imin            0.136     0.136     0.137
imax            0.665     0.664     0.665
excite_mean     0.017     0.017     0.017
fracstop        1.000     1.000     1.000
cjmean          3.118     3.118     3.118

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       170.5     170.4     170.7
kozaiamp        179.9     179.9     179.9