Orbit Fit and Astrometric record for 13UX16

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: 13UX16    
# Created Mon Dec 18 02:37:58 2017
# Orbit generated from Bernstein formalism
# Fitting   44 observations of   44
# Arc:   4.08y
# First observation: 2013/08/02
#  Last observation: 2017/08/30
Preliminary a, adot, b, bdot, g, gdot:
  -0.000165   0.019062   0.000004   0.001362   0.022453   0.000000
# Chi-squared of fit:    17.69 DOF:   82 RMS:  0.11
# Min/Max residuals:    -0.23    0.35
# Exact a, adot, b, bdot, g, gdot:
  1.407651E-05  1.914186E-02  7.102277E-07  1.373522E-03  2.255904E-02  4.191605E-03
# Covariance matrix:
  1.7310E-13 -2.3451E-14  9.1390E-16  9.3457E-16  1.1833E-13  2.1530E-13
 -2.3451E-14  1.4716E-13 -3.4326E-15  1.0068E-14  7.6640E-14  1.9230E-12
  9.1390E-16 -3.4326E-15  5.7806E-14 -2.4108E-14 -1.1751E-15 -5.1547E-14
  9.3457E-16  1.0068E-14 -2.4108E-14  2.3958E-14  7.1459E-15  1.5774E-13
  1.1833E-13  7.6640E-14 -1.1751E-15  7.1459E-15  1.6821E-13  1.4025E-12
  2.1530E-13  1.9230E-12 -5.1547E-14  1.5774E-13  1.4025E-12  3.0196E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.787146   14.887548    0.920025   -0.013473   -0.432676  2456507.005448
# Heliocentric elements and errors
Epoch:              2456500.5000  =  2013/07/27
Mean Anomaly:          115.78339 +/-     0.052
Argument of Peri:      199.49020 +/-     0.044
Long of Asc Node:       37.30429 +/-     0.002
Inclination:             4.41384 +/-     0.000
Eccentricity:         0.23544223 +/-    0.0002
Semi-Major Axis:     39.25574580 +/-    0.0037
Time of Perihelion: 2427607.2072 +/-      12.4
Perihelion:          30.01328564 +/-    0.0066
Aphelion:            48.49820597 +/-    0.0075
Period (y)              245.9592 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           43.47380676 +/-    0.0008
Ecliptic Y           10.60855661 +/-    0.0002
Ecliptic Z           -1.38236481 +/-    0.0000
Ecliptic XDOT        -0.00010667 +/-    0.0000
Ecliptic YDOT         0.00237629 +/-    0.0000
Ecliptic ZDOT         0.00015089 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.77079718 +/-    0.0008
Geocenter to KBO     44.32813668 +/-    0.0008
# Hcoef:  8.09

The following table shows the complete astrometric record for 13UX16. 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 (13UX16) followed by the observatory code and reference code for the source of the astrometry.

2013 08  02.50467  00 57 35.944  +04 13 01.43  24.1r 13UX16    568  C~2NKX      
2013 08  02.54741  00 57 35.889  +04 13 01.06  24.4r 13UX16    568  C~2NKX      
2013 08  31.42413  00 56 26.129  +04 05 09.98  24.1r 13UX16    568  C~2NKX      
2013 08  31.46730  00 56 25.980  +04 05 09.23  24.3r 13UX16    568  C~2NKX      
2013 09  04.40430  00 56 12.539  +04 03 42.51  25.2r 13UX16    568  C~2NKX      
2013 09  04.44707  00 56 12.410  +04 03 41.55  24.5r 13UX16    568  C~2NKX      
2013 10  05.37122  00 54 07.619  +03 50 41.81  24.4r 13UX16    568  C~2NKX      
2013 10  05.37632  00 54 07.597  +03 50 41.51  24.3r 13UX16    568  C~2NKX      
2013 10  06.37972  00 54 03.240  +03 50 15.09  25.0r 13UX16    568  C~2NKX      
2013 10  06.44410  00 54 02.968  +03 50 13.34  24.1r 13UX16    568  C~2NKX      
2013 10  09.50414  00 53 49.665  +03 48 52.72  24.0r 13UX16    568  C~2NKX      
2013 10  09.50879  00 53 49.651  +03 48 52.63  24.2r 13UX16    568  C~2NKX      
2013 10  31.22708  00 52 18.830  +03 39 54.32  23.7r 13UX16    568  C~2NKX      
2013 10  31.27019  00 52 18.676  +03 39 53.39  24.5r 13UX16    568  C~2NKX      
2013 10  31.31297  00 52 18.485  +03 39 52.45  24.2r 13UX16    568  C~2NKX      
2013 11  01.25343  00 52 14.845  +03 39 31.27  24.2r 13UX16    568  C~2NKX      
2013 11  01.37273  00 52 14.358  +03 39 28.68  24.9r 13UX16    568  C~2NKX      
2013 11  02.29201  00 52 10.845  +03 39 08.61  24.0r 13UX16    568  C~2NKX      
2013 11  05.37780  00 51 59.175  +03 38 01.60  24.0r 13UX16    568  C~2NKX      
2013 11  07.43574  00 51 51.636  +03 37 18.98  25.0r 13UX16    568  C~2NKX      
2013 12  04.24324  00 50 35.472  +03 30 33.34  24.9r 13UX16    568  C~2NKX      
2013 12  05.31529  00 50 33.417  +03 30 23.77  24.8r 13UX16    568  C~2NKX      
2014 06  28.57952  01 01 28.862  +04 43 16.10  24.6r 13UX16    568  C~2NKX      
2014 07  23.55193  01 01 40.824  +04 43 49.29  24.4r 13UX16    568  C~2NKX      
2014 08  22.61348  01 00 50.720  +04 37 57.38  25.0r 13UX16    568  C~2NKX      
2014 08  28.45040  01 00 33.776  +04 36 06.90  25.3r 13UX16    568  C~2NKX      
2014 10  23.27749  00 56 50.661  +04 13 12.69  24.2r 13UX16    568  C~2NKX      
2014 10  23.33112  00 56 50.454  +04 13 11.49  24.8r 13UX16    568  C~2NKX      
2014 10  23.38450  00 56 50.216  +04 13 10.37  24.3r 13UX16    568  C~2NKX      
2014 10  25.45680  00 56 41.599  +04 12 19.83  23.9r 13UX16    568  C~2NKX      
2014 10  27.24490  00 56 34.296  +04 11 36.88  24.3r 13UX16    568  C~2NKX      
2014 10  27.30310  00 56 34.065  +04 11 35.53  24.2r 13UX16    568  C~2NKX      
2014 10  27.36937  00 56 33.780  +04 11 33.85  24.1r 13UX16    568  C~2NKX      
2014 10  29.25791  00 56 26.137  +04 10 49.40  24.7r 13UX16    568  C~2NKX      
2014 11  19.20738  00 55 11.087  +04 03 46.07  24.9r 13UX16    568  C~2NKX      
2014 11  19.27463  00 55 10.866  +04 03 44.92  24.4r 13UX16    568  C~2NKX      
2014 11  25.22391  00 54 53.831  +04 02 14.12  24.4r 13UX16    568  C~2NKX      
2015 01  17.26407  00 54 22.011  +04 01 44.50  24.7r 13UX16    568  C~2NKX      
2015 12  07.36957  00 58 21.607  +04 29 31.86  24.8w 13UX16    568  C~2NKX      
2017 07  24.59111  01 13 14.022  +06 10 04.78  24.6w 13UX16    568  C~2NKX      
2017 08  25.54688  01 12 23.092  +06 04 21.34  24.9w 13UX16    568  C~2NKX      
2017 08  25.62549  01 12 22.872  +06 04 20.12  24.4w 13UX16    568  C~2NKX      
2017 08  30.48798  01 12 08.931  +06 02 51.88  25.0w 13UX16    568  C~2NKX      
2017 08  30.54049  01 12 08.765  +06 02 50.76  25.0w 13UX16    568  C~2NKX      

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    -0.14       0.00     0.05
  2   0.0001     -0.90     0.00      -0.02     0.07
  3   0.0792  -1145.51     0.09     -32.19    -0.13
  4   0.0793  -1147.85     0.11     -32.02     0.05
  5   0.0901  -1366.86    -0.14     -34.44     0.12
  6   0.0902  -1369.01     0.19     -34.58    -0.02
  7   0.1749  -3392.95     0.01     -32.71     0.10
  8   0.1749  -3393.37    -0.04     -32.86    -0.06
  9   0.1776  -3463.75    -0.08     -32.02     0.04
 10   0.1778  -3468.18     0.07     -32.06    -0.08
 11   0.1862  -3683.03    -0.23     -29.47    -0.03
 12   0.1862  -3683.26    -0.13     -29.47    -0.04
 13   0.2456  -5145.76    -0.04      -0.16    -0.02
 14   0.2458  -5148.24     0.22      -0.12    -0.08
 15   0.2459  -5151.25    -0.06       0.12     0.06
 16   0.2485  -5209.72     0.13       1.67    -0.08
 17   0.2488  -5217.45    -0.07       2.10     0.07
 18   0.2513  -5273.75     0.35       3.95     0.23
 19   0.2597  -5460.89    -0.19       9.76    -0.02
 20   0.2654  -5581.53    -0.20      14.15     0.12
 21   0.3388  -6790.99     0.12      81.70     0.11
 22   0.3417  -6823.10    -0.08      84.80     0.06
 23   0.9037   3913.72    -0.05     334.37    -0.02
 24   0.9721   4091.63    -0.01     296.30    -0.11
 25   1.0544   3264.59     0.26     259.28    -0.17
 26   1.0704   2988.19    -0.19     254.70     0.07
 27   1.2232   -620.68    -0.17     271.58    -0.11
 28   1.2233   -624.00     0.16     271.67    -0.12
 29   1.2235   -627.72     0.08     272.01     0.12
 30   1.2292   -766.15    -0.09     275.10     0.11
 31   1.2341   -883.51     0.07     277.62    -0.06
 32   1.2342   -887.22     0.22     277.71    -0.09
 33   1.2344   -891.80     0.04     277.80    -0.13
 34   1.2396  -1014.44    -0.13     280.91    -0.07
 35   1.2969  -2213.74     0.06     323.80    -0.02
 36   1.2971  -2217.24    -0.10     324.01     0.01
 37   1.3134  -2487.45     0.08     338.70    -0.07
 38   1.4586  -2938.13    -0.02     495.34     0.02
 39   2.3460   1011.90    -0.09     650.76     0.01
 40   3.9756  15664.08     0.07    1126.55     0.00
 41   4.0631  14826.38    -0.00    1097.22    -0.05
 42   4.0633  14822.87     0.05    1097.34     0.08
 43   4.0766  14595.84    -0.01    1094.73     0.10
 44   4.0768  14593.11    -0.11    1094.63     0.01

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.

13UX16    quality flag:3

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

axisobj        39.439    39.450    39.429
ecceobj         0.234     0.234     0.233
incobj          4.405     4.405     4.405
qmin           29.116    29.078    29.144
qmax           50.506    50.492    50.412
amean          39.456    39.456    39.456
amin           38.966    38.971    38.934
amax           40.039    40.016    40.035
emean           0.238     0.238     0.242
emin            0.200     0.208     0.223
emax            0.262     0.263     0.261
imean           4.989     5.003     4.415
imin            2.988     2.874     3.097
imax            8.052     7.766     5.650
excite_mean     0.255     0.255     0.254
fracstop        1.000     1.000     1.000
cjmean          2.977     2.977     2.977

libcent 0       179.6     180.0     179.7
libamp  0       100.6      96.0     105.2
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       299.5     288.5     272.6
kozaiamp         77.7      74.9     180.0