Orbit Fit and Astrometric record for 13UF17

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: 13UF17    
# Created Mon Dec 18 02:37:58 2017
# Orbit generated from Bernstein formalism
# Fitting   37 observations of   38
# Arc:   2.35y
# First observation: 2013/08/02
#  Last observation: 2015/12/07
Preliminary a, adot, b, bdot, g, gdot:
  -0.000363   0.039615  -0.000042  -0.012086   0.033111   0.000000
# Chi-squared of fit:     4.83 DOF:   68 RMS:  0.06
# Min/Max residuals:    -0.16    0.19
# Exact a, adot, b, bdot, g, gdot:
  1.901550E-05  3.949591E-02 -6.131097E-06 -1.216686E-02  3.317606E-02  5.954970E-03
# Covariance matrix:
  1.5219E-13 -2.9171E-15  6.4623E-15 -2.6274E-14  1.0655E-13  1.1520E-12
 -2.9171E-15  3.2304E-13  2.7521E-14 -1.2137E-13  1.7066E-13  5.3602E-12
  6.4623E-15  2.7521E-14  8.5744E-14 -8.3043E-14  1.9744E-14  6.9334E-13
 -2.6274E-14 -1.2137E-13 -8.3043E-14  1.7534E-13 -8.4627E-14 -3.0768E-12
  1.0655E-13  1.7066E-13  1.9744E-14 -8.4627E-14  1.9554E-13  3.7283E-12
  1.1520E-12  5.3602E-12  6.9334E-13 -3.0768E-12  3.7283E-12  1.3596E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.095778   16.115577    0.928979   -0.007875   -0.413236  2456507.020968
# Heliocentric elements and errors
Epoch:              2456500.5000  =  2013/07/27
Mean Anomaly:           19.43180 +/-     0.033
Argument of Peri:      150.79407 +/-     0.063
Long of Asc Node:      190.86825 +/-     0.000
Inclination:            17.11954 +/-     0.000
Eccentricity:         0.25150694 +/-    0.0002
Semi-Major Axis:     39.52745340 +/-    0.0048
Time of Perihelion: 2451600.9388 +/-       8.4
Perihelion:          29.58602456 +/-    0.0086
Aphelion:            49.46888223 +/-    0.0099
Period (y)              248.5172 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           29.60715852 +/-    0.0004
Ecliptic Y            7.59053110 +/-    0.0001
Ecliptic Z           -0.57657457 +/-    0.0000
Ecliptic XDOT        -0.00045737 +/-    0.0000
Ecliptic YDOT         0.00326155 +/-    0.0000
Ecliptic ZDOT        -0.00101314 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   30.57012326 +/-    0.0004
Geocenter to KBO     30.14221516 +/-    0.0004
# Hcoef:  8.99

The following table shows the complete astrometric record for 13UF17. 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 (13UF17) followed by the observatory code and reference code for the source of the astrometry.

2013 08  02.52019  01 01 04.814  +05 19 38.78  23.8r 13UF17    568  C~2NKY      
2013 08  02.56292  01 01 04.755  +05 19 37.99  23.8r 13UF17    568  C~2NKY      
2013 08  30.43573  00 59 45.917  +05 07 05.32  23.8r 13UF17    568  C~2NKY      
2013 08  31.43992  00 59 41.722  +05 06 30.07  23.7r 13UF17    568  C~2NKY      
2013 08  31.48289  00 59 41.539  +05 06 28.61  23.8r 13UF17    568  C~2NKY      
2013 09  04.41593  00 59 24.345  +05 04 05.95  23.7r 13UF17    568  C~2NKY      
2013 09  04.45871  00 59 24.143  +05 04 04.32  23.6r 13UF17    568  C~2NKY      
2013 10  06.38359  00 56 33.317  +04 41 52.43  23.7r 13UF17    568  C~2NKY      
2013 10  06.44798  00 56 32.935  +04 41 49.55  23.3r 13UF17    568  C~2NKY      
2013 10  06.45762  00 56 32.881  +04 41 49.06  23.6r 13UF17    568  C~2NKY      
2013 10  06.46264  00 56 32.840  +04 41 48.88  23.5r 13UF17    568  C~2NKY      
2013 10  09.51275  00 56 15.089  +04 39 35.06  23.6r 13UF17    568  C~2NKY      
2013 10  31.23096  00 54 13.498  +04 24 23.06  23.8r 13UF17    568  C~2NKY      
2013 10  31.27407  00 54 13.259  +04 24 21.40  23.7r 13UF17    568  C~2NKY      
2013 10  31.31685  00 54 13.037  +04 24 19.71  23.8r 13UF17    568  C~2NKY      
2013 11  01.25731  00 54 08.175  +04 23 43.21  23.5r 13UF17    568  C~2NKY      
2013 11  01.37789  00 54 07.538  +04 23 38.62  23.9r 13UF17    568  C~2NKY      
2013 11  05.38291  00 53 47.402  +04 21 07.35  23.6r 13UF17    568  C~2NKY      
2013 11  29.22005  00 52 13.176  +04 09 02.93  24.0r 13UF17    568  C~2NKY      
2013 12  04.24712  00 52 00.207  +04 07 16.52  23.7r 13UF17    568  C~2NKY      
2013 12  04.29457  00 52 00.083  +04 07 15.44  23.6r 13UF17    568  C~2NKY      
2013 12  06.21068  00 51 55.914  +04 06 39.94  23.8r 13UF17    568  C~2NKY      
2014 06  27.59782  01 09 52.700  +05 35 34.37  23.9r 13UF17    568  C~2NKY      
2014 06  28.60286  01 09 55.792  +05 35 42.46  23.9r 13UF17    568  C~2NKY      
2014 07  24.56087  01 10 35.050  +05 34 59.83  23.7r 13UF17    568  C~2NKY      
2014 07  27.59171  01 10 34.469  +05 34 22.95  23.8r 13UF17    568  C~2NKY      
2014 08  22.56426  01 09 47.089  +05 24 53.44  24.0r 13UF17    568  C~2NKY      
2014 10  23.36016  01 04 33.416  +04 43 49.40  23.5r 13UF17    568  C~2NKY      
2014 10  26.45694  01 04 16.032  +04 41 42.93  23.6r 13UF17    568  C~2NKY      
2014 10  27.39884  01 04 10.880  +04 41 04.71  23.7r 13UF17    568  C~2NKY      
2014 11  24.23611  01 02 00.223  +04 25 13.91  23.9r 13UF17    568  C~2NKY      
2014 11  24.24000  01 02 00.203  +04 25 13.95  23.8r 13UF17    568  C~2NKY      
2014 11  25.23226  01 01 56.661  +04 24 47.84  24.1r 13UF17    568  C~2NKY      
2014 11  25.23617  01 01 56.646  +04 24 47.68  23.8r 13UF17    568  C~2NKY      
2014 12  17.26663  01 01 04.496  +04 18 06.61  23.9r 13UF17    568  C~2NKY      
2015 01  17.29797  01 01 29.415  +04 19 15.45  23.8r 13UF17    568  C~2NKY      
2015 08  20.51066  01 19 17.556  +05 38 38.24  23.8r 13UF17    568  C~2NKY      
2015 12  07.38604  01 10 44.024  +04 33 47.32  23.6w 13UF17    568  C~2NKY      

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     0.07
  2   0.0001     -1.12     0.01      -0.39     0.03
  3   0.0764  -1377.55    -0.03    -243.07    -0.00
  4   0.0792  -1448.96    -0.02    -251.53    -0.01
  5   0.0793  -1452.04     0.04    -251.82     0.02
  6   0.0901  -1744.06     0.11    -284.79    -0.06
  7   0.0902  -1747.47     0.04    -285.13    -0.08
  8   0.1776  -4617.25    -0.02    -531.77    -0.03
  9   0.1778  -4623.63    -0.04    -532.22    -0.07
 10   0.1778  -4624.56    -0.02    -532.36    -0.15
 11   0.1778  -4625.20    -0.16    -532.29    -0.05
 12   0.1862  -4921.81    -0.06    -553.50     0.08
 13   0.2456  -6952.78     0.11    -693.54    -0.03
 14   0.2457  -6956.72    -0.03    -693.70     0.05
 15   0.2458  -6960.44     0.03    -693.97    -0.00
 16   0.2484  -7041.71     0.02    -699.57    -0.01
 17   0.2488  -7052.28     0.00    -700.13     0.06
 18   0.2597  -7388.91    -0.11    -723.37    -0.06
 19   0.3250  -8971.38     0.19    -846.92     0.00
 20   0.3387  -9191.90     0.04    -870.04     0.09
 21   0.3389  -9194.03    -0.15    -870.32    -0.00
 22   0.3441  -9265.42     0.07    -878.94     0.07
 23   0.9010   7653.09     0.03   -2130.07     0.05
 24   0.9037   7698.92     0.03   -2140.16    -0.04
 25   0.9748   8225.62    -0.06   -2402.80     0.06
 26   0.9831   8203.55     0.03   -2433.64    -0.01
 27   1.0542   7331.43     0.08   -2691.30    -0.06
 28   1.2234   2055.70    -0.05   -3180.04     0.12
 29   1.2319   1767.15 (  -0.58)  -3197.43 (   0.50)
 30   1.2344   1681.35    -0.04   -3203.26    -0.01
 31   1.3107   -487.83    -0.03   -3333.05    -0.08
 32   1.3107   -488.09    -0.05   -3332.90     0.09
 33   1.3134   -547.03     0.02   -3336.70     0.03
 34   1.3134   -547.30    -0.02   -3336.76    -0.02
 35   1.3737  -1421.61     0.10   -3407.94     0.06
 36   1.4587  -1050.94     0.04   -3487.41     0.01
 37   2.0479  15555.88    -0.01   -5162.39    -0.08
 38   2.3460   6952.22    -0.03   -5853.69    -0.04

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.

13UF17    quality flag:3

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

axisobj        39.745    39.765    39.726
ecceobj         0.256     0.257     0.256
incobj         17.086    17.086    17.086
qmin           28.261    28.320    28.185
qmax           51.357    51.342    51.430
amean          39.455    39.455    39.455
amin           38.954    38.921    38.959
amax           40.040    40.042    40.028
emean           0.233     0.236     0.235
emin            0.186     0.187     0.191
emax            0.284     0.283     0.285
imean          17.879    17.776    17.810
imin           15.907    15.849    15.703
imax           19.583    19.570    19.560
excite_mean     0.386     0.387     0.387
fracstop        1.000     1.000     1.000
cjmean          2.880     2.880     2.880

libcent 0       180.3     179.7     179.6
libamp  0       112.2     113.3     110.8
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        97.6      99.0      92.0
kozaiamp         64.0      69.0      60.0