Orbit Fit and Astrometric record for 13UX17

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: 13UX17    
# Created Fri Dec 15 02:37:55 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:
  -0.000141   0.019819  -0.000000   0.001016   0.022607   0.000000
# Chi-squared of fit:    16.52 DOF:   68 RMS:  0.12
# Min/Max residuals:    -0.41    0.33
# Exact a, adot, b, bdot, g, gdot:
  1.400155E-05  1.968494E-02  6.368156E-07  1.015349E-03  2.255370E-02  1.142076E-03
# Covariance matrix:
  1.5552E-13  5.1179E-16 -6.7079E-16  5.8868E-15  1.3184E-13  3.3543E-12
  5.1179E-16  2.1156E-13 -1.9946E-15  1.2102E-14  1.4046E-13  6.6902E-12
 -6.7079E-16 -1.9946E-15  7.7727E-14 -6.4659E-14 -2.0197E-15 -1.4164E-13
  5.8868E-15  1.2102E-14 -6.4659E-14  1.0936E-13  1.4399E-14  8.1871E-13
  1.3184E-13  1.4046E-13 -2.0197E-15  1.4399E-14  2.4211E-13  8.0781E-12
  3.3543E-12  6.6902E-12 -1.4164E-13  8.1871E-13  8.0781E-12  4.5034E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.736288   17.128605    0.936060   -0.005072   -0.396973  2456507.032638
# Heliocentric elements and errors
Epoch:              2456500.5000  =  2013/07/27
Mean Anomaly:          163.38866 +/-     0.386
Argument of Peri:      178.81784 +/-     0.387
Long of Asc Node:       29.88185 +/-     0.004
Inclination:             3.02376 +/-     0.001
Eccentricity:         0.13521125 +/-    0.0002
Semi-Major Axis:     39.56925060 +/-    0.0030
Time of Perihelion: 2415238.0920 +/-      97.3
Perihelion:          34.21904286 +/-    0.0079
Aphelion:            44.91945835 +/-    0.0082
Period (y)              248.9115 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           43.02338303 +/-    0.0009
Ecliptic Y           12.28290656 +/-    0.0003
Ecliptic Z           -0.56969469 +/-    0.0000
Ecliptic XDOT        -0.00057602 +/-    0.0000
Ecliptic YDOT         0.00232409 +/-    0.0000
Ecliptic ZDOT         0.00012160 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.74601472 +/-    0.0009
Geocenter to KBO     44.33862592 +/-    0.0010
# Hcoef:  7.86

The following table shows the complete astrometric record for 13UX17. 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 (13UX17) followed by the observatory code and reference code for the source of the astrometry.

2013 08  02.53186  01 04 17.270  +06 02 50.96  24.6r 13UX17    568  C~2NKb      
2013 08  02.57457  01 04 17.217  +06 02 50.48  24.6r 13UX17    568  C~2NKb      
2013 08  30.44895  01 03 14.477  +05 56 16.14  24.1r 13UX17    568  C~2NKb      
2013 08  31.45170  01 03 11.282  +05 55 56.41  24.6r 13UX17    568  C~2NKb      
2013 08  31.51726  01 03 11.062  +05 55 55.21        13UX17    568  C~2NKb      
2013 09  04.43153  01 02 58.106  +05 54 34.75  24.5r 13UX17    568  C~2NKb      
2013 09  04.47439  01 02 57.960  +05 54 33.95  23.6r 13UX17    568  C~2NKb      
2013 09  04.50640  01 02 57.834  +05 54 33.41  23.7r 13UX17    568  C~2NKb      
2013 10  06.41277  01 00 50.387  +05 41 32.89  24.5r 13UX17    568  C~2NKb      
2013 10  06.50014  01 00 50.024  +05 41 30.54  24.4r 13UX17    568  C~2NKb      
2013 10  06.50554  01 00 49.990  +05 41 30.39  24.0r 13UX17    568  C~2NKb      
2013 10  06.51103  01 00 49.955  +05 41 30.33  24.2r 13UX17    568  C~2NKb      
2013 10  06.51584  01 00 49.932  +05 41 30.29  24.2r 13UX17    568  C~2NKb      
2013 10  09.54274  01 00 36.822  +05 40 10.56  24.1r 13UX17    568  C~2NKb      
2013 10  31.25446  00 59 05.255  +05 31 00.30  24.0r 13UX17    568  C~2NKb      
2013 10  31.29744  00 59 05.074  +05 30 59.17  24.4r 13UX17    568  C~2NKb      
2013 10  31.34016  00 59 04.913  +05 30 58.16  23.9r 13UX17    568  C~2NKb      
2013 11  01.28119  00 59 01.207  +05 30 35.91  24.8r 13UX17    568  C~2NKb      
2013 11  01.40856  00 59 00.677  +05 30 32.90  24.1r 13UX17    568  C~2NKb      
2013 11  05.45881  00 58 45.051  +05 29 00.22  24.8r 13UX17    568  C~2NKb      
2013 11  29.32101  00 57 29.700  +05 21 42.83  24.6r 13UX17    568  C~2NKb      
2013 12  04.27126  00 57 18.554  +05 20 40.71  24.3r 13UX17    568  C~2NKb      
2013 12  04.32344  00 57 18.467  +05 20 40.35  24.1r 13UX17    568  C~2NKb      
2014 06  27.59003  01 08 12.961  +06 31 00.21  24.4r 13UX17    568  C~2NKb      
2014 06  28.59510  01 08 14.676  +06 31 10.38  24.8r 13UX17    568  C~2NKb      
2014 07  24.55310  01 08 30.780  +06 32 39.65  24.4r 13UX17    568  C~2NKb      
2014 07  27.58380  01 08 29.083  +06 32 28.15  23.3r 13UX17    568  C~2NKb      
2014 08  22.59325  01 07 45.686  +06 27 55.88  24.3r 13UX17    568  C~2NKb      
2014 08  26.43852  01 07 35.228  +06 26 51.07  24.7u 13UX17    568  C~2NKb      
2014 10  23.37959  01 03 47.485  +06 03 50.54  24.0r 13UX17    568  C~2NKb      
2014 10  27.39496  01 03 30.670  +06 02 10.38  24.4r 13UX17    568  C~2NKb      
2014 11  24.24776  01 01 50.822  +05 52 25.00  23.9r 13UX17    568  C~2NKb      
2014 11  25.24396  01 01 48.009  +05 52 08.85  24.2r 13UX17    568  C~2NKb      
2014 12  17.27453  01 01 03.814  +05 48 07.58  24.4r 13UX17    568  C~2NKb      
2015 01  17.30307  01 01 09.285  +05 49 30.59  24.1r 13UX17    568  C~2NKb      
2015 08  20.50656  01 11 58.800  +06 57 30.78  24.3r 13UX17    568  C~2NKb      
2015 12  07.39423  01 05 25.678  +06 18 36.91  24.7w 13UX17    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    -0.04       0.00     0.02
  2   0.0001     -0.91    -0.04      -0.14    -0.13
  3   0.0764  -1016.54     0.12      -6.51    -0.11
  4   0.0792  -1068.13    -0.01      -6.49    -0.03
  5   0.0794  -1071.62    -0.04      -6.35     0.09
  6   0.0901  -1281.01    -0.05      -6.69    -0.09
  7   0.0902  -1283.33     0.04      -6.59    -0.02
  8   0.0903  -1285.27    -0.10      -6.37     0.19
  9   0.1776  -3341.37    -0.02       1.62     0.06
 10   0.1779  -3347.28     0.27       1.53    -0.12
 11   0.1779  -3347.81     0.13       1.58    -0.07
 12   0.1779  -3348.31     0.01       1.73     0.07
 13   0.1779  -3348.65     0.02       1.82     0.16
 14   0.1862  -3560.00     0.33       3.29    -0.08
 15   0.2456  -5034.11    -0.00      20.25     0.14
 16   0.2458  -5037.04    -0.15      20.25     0.07
 17   0.2459  -5039.65     0.02      20.24     0.00
 18   0.2485  -5099.32     0.14      20.97    -0.16
 19   0.2488  -5107.79    -0.13      21.23    -0.08
 20   0.2599  -5358.96    -0.03      25.37    -0.09
 21   0.3252  -6566.85    -0.00      54.59     0.08
 22   0.3388  -6744.58    -0.41      61.35    -0.06
 23   0.3389  -6745.92     0.03      61.52     0.01
 24   0.9009   3893.24    -0.03     221.27    -0.07
 25   0.9037   3920.75     0.01     220.95    -0.06
 26   0.9747   4176.76    -0.02     212.21     0.10
 27   0.9830   4148.99    -0.22     211.19     0.03
 28   1.0542   3447.03     0.12     205.54     0.25
 29   1.0648   3278.18    -0.15     204.96     0.09
 30   1.2234   -387.74     0.17     224.93     0.03
 31   1.2344   -657.80    -0.02     228.34     0.05
 32   1.3107  -2258.14     0.10     258.03    -0.00
 33   1.3134  -2303.11     0.14     259.20    -0.08
 34   1.3737  -3004.82    -0.28     289.26     0.05
 35   1.4586  -2897.56     0.00     334.61    -0.14
 36   2.0478   7612.40    -0.00     415.72    -0.02
 37   2.3460   1304.17     0.09     484.50    -0.06

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.

13UX17    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.746    39.756    39.736
ecceobj         0.131     0.131     0.131
incobj          3.016     3.016     3.016
qmin           33.213    33.242    33.253
qmax           46.216    46.257    46.261
amean          39.458    39.458    39.458
amin           39.023    39.019    39.032
amax           39.943    39.944    39.943
emean           0.139     0.139     0.139
emin            0.121     0.121     0.122
emax            0.158     0.158     0.159
imean           2.597     2.602     2.597
imin            1.887     1.885     1.904
imax            3.283     3.274     3.293
excite_mean     0.147     0.147     0.147
fracstop        1.000     1.000     1.000
cjmean          3.027     3.028     3.027

libcent 0       180.2     180.3     181.0
libamp  0        87.8      89.4      84.8
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       176.5     179.7     173.6
kozaiamp        180.0     179.9     180.0