Orbit Fit and Astrometric record for 13UT17

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: 13UT17    
# Created Mon Dec 18 02:37:58 2017
# Orbit generated from Bernstein formalism
# Fitting   28 observations of   28
# Arc:   4.08y
# First observation: 2013/08/02
#  Last observation: 2017/08/30
Preliminary a, adot, b, bdot, g, gdot:
  -0.000219   0.021852  -0.000004   0.001381   0.023088   0.000000
# Chi-squared of fit:     4.59 DOF:   50 RMS:  0.07
# Min/Max residuals:    -0.12    0.21
# Exact a, adot, b, bdot, g, gdot:
  1.480072E-05  2.171158E-02  6.523950E-07  1.376381E-03  2.308870E-02  9.195321E-04
# Covariance matrix:
  2.2950E-13 -1.1012E-13  2.4239E-15 -3.7106E-15  1.1106E-13 -6.3384E-13
 -1.1012E-13  2.9166E-13 -6.3402E-15  1.7093E-14  6.3003E-14  3.1329E-12
  2.4239E-15 -6.3402E-15  8.6523E-14 -3.6822E-14 -9.6333E-16 -7.7136E-14
 -3.7106E-15  1.7093E-14 -3.6822E-14  3.9653E-14  5.6006E-15  2.1442E-13
  1.1106E-13  6.3003E-14 -9.6333E-16  5.6006E-15  1.5331E-13  1.0757E-12
 -6.3384E-13  3.1329E-12 -7.7136E-14  2.1442E-13  1.0757E-12  3.9406E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.806947   16.780107    0.933655   -0.012666   -0.402432  2456507.028758
# Heliocentric elements and errors
Epoch:              2456500.5000  =  2013/07/27
Mean Anomaly:          126.52351 +/-     0.514
Argument of Peri:      204.76870 +/-     0.510
Long of Asc Node:       42.06511 +/-     0.003
Inclination:             4.00523 +/-     0.000
Eccentricity:         0.02347986 +/-    0.0002
Semi-Major Axis:     43.10651780 +/-    0.0033
Time of Perihelion: 2420169.1473 +/-     147.6
Perihelion:          42.09438296 +/-    0.0093
Aphelion:            44.11865265 +/-    0.0093
Period (y)              283.0236 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           42.10119993 +/-    0.0007
Ecliptic Y           11.72316937 +/-    0.0002
Ecliptic Z           -1.36561681 +/-    0.0000
Ecliptic XDOT        -0.00064023 +/-    0.0000
Ecliptic YDOT         0.00249705 +/-    0.0000
Ecliptic ZDOT         0.00015983 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.72423407 +/-    0.0007
Geocenter to KBO     43.31122577 +/-    0.0007
# Hcoef:  7.70

The following table shows the complete astrometric record for 13UT17. 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 (13UT17) followed by the observatory code and reference code for the source of the astrometry.

2013 08  02.52798  01 04 38.320  +04 55 29.85  24.1r 13UT17    568  C~2NKa      
2013 08  02.57069  01 04 38.267  +04 55 29.40  24.1r 13UT17    568  C~2NKa      
2013 08  30.44360  01 03 35.719  +04 48 25.09  23.6r 13UT17    568  C~2NKa      
2013 10  06.40889  01 01 10.412  +04 33 19.49  24.0r 13UT17    568  C~2NKa      
2013 10  06.49158  01 01 10.033  +04 33 17.09  24.0r 13UT17    568  C~2NKa      
2013 10  06.49617  01 01 10.018  +04 33 17.13  24.0r 13UT17    568  C~2NKa      
2013 10  31.25056  00 59 24.152  +04 22 51.95  24.0r 13UT17    568  C~2NKa      
2013 10  31.29356  00 59 23.975  +04 22 51.20  23.9r 13UT17    568  C~2NKa      
2013 10  31.33628  00 59 23.799  +04 22 50.21  23.8r 13UT17    568  C~2NKa      
2013 11  01.27683  00 59 20.047  +04 22 28.48  23.8r 13UT17    568  C~2NKa      
2013 11  01.40318  00 59 19.532  +04 22 25.58  23.9r 13UT17    568  C~2NKa      
2013 11  05.45493  00 59 03.730  +04 20 55.71  24.0r 13UT17    568  C~2NKa      
2013 11  29.31710  00 57 47.785  +04 14 05.39  24.0r 13UT17    568  C~2NKa      
2013 12  04.26738  00 57 36.641  +04 13 11.23  24.0r 13UT17    568  C~2NKa      
2013 12  04.31956  00 57 36.523  +04 13 10.77  23.9r 13UT17    568  C~2NKa      
2014 06  27.59782  01 08 54.929  +05 28 00.36  24.0r 13UT17    568  C~2NKa      
2014 06  28.60286  01 08 56.749  +05 28 09.71  24.2r 13UT17    568  C~2NKa      
2014 07  24.54916  01 09 14.901  +05 29 16.30  24.2r 13UT17    568  C~2NKa      
2014 07  27.57991  01 09 13.393  +05 29 01.96  23.7r 13UT17    568  C~2NKa      
2014 08  28.42620  01 08 14.480  +05 22 16.94  23.7r 13UT17    568  C~2NKa      
2014 10  23.36016  01 04 30.633  +04 59 29.68  23.7r 13UT17    568  C~2NKa      
2014 10  27.39884  01 04 13.541  +04 57 50.41  23.9r 13UT17    568  C~2NKa      
2014 11  24.24000  01 02 32.646  +04 48 28.71  24.2r 13UT17    568  C~2NKa      
2014 11  25.23617  01 02 29.782  +04 48 13.83  23.9r 13UT17    568  C~2NKa      
2015 01  17.29797  01 01 51.970  +04 47 13.53  24.6r 13UT17    568  C~2NKa      
2017 07  24.60098  01 22 40.422  +07 06 07.26        13UT17    568  C~2NKa      
2017 08  25.51775  01 21 56.431  +07 01 08.06  24.1w 13UT17    568  C~2NKa      
2017 08  30.45989  01 21 42.906  +06 59 43.15  24.4w 13UT17    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     0.01       0.00     0.06
  2   0.0001     -0.90     0.02      -0.11    -0.01
  3   0.0764  -1026.96    -0.01     -34.66    -0.03
  4   0.1776  -3380.79     0.12     -39.18     0.08
  5   0.1779  -3386.94    -0.11     -39.22    -0.06
  6   0.1779  -3387.13     0.03     -39.10     0.06
  7   0.2456  -5089.73    -0.01      -8.99    -0.11
  8   0.2458  -5092.46     0.06      -8.66     0.12
  9   0.2459  -5095.27     0.04      -8.57     0.12
 10   0.2485  -5155.47     0.01      -7.08    -0.06
 11   0.2488  -5163.70    -0.04      -6.80    -0.07
 12   0.2599  -5416.60    -0.10       0.98    -0.03
 13   0.3252  -6624.07    -0.08      58.71    -0.01
 14   0.3388  -6798.97     0.07      72.81    -0.10
 15   0.3389  -6800.77     0.00      73.07    -0.02
 16   0.9009   4288.12    -0.02     340.71     0.11
 17   0.9037   4316.82     0.01     339.01    -0.02
 18   0.9747   4592.93    -0.05     297.42    -0.01
 19   0.9830   4566.64     0.16     292.73    -0.03
 20   1.0702   3598.58    -0.12     253.16    -0.08
 21   1.2234    -14.47    -0.12     265.53     0.06
 22   1.2344   -288.43    -0.04     271.46    -0.00
 23   1.3106  -1896.58     0.21     329.58    -0.01
 24   1.3134  -1941.83    -0.09     332.23     0.07
 25   1.4586  -2487.07     0.03     493.06    -0.02
 26   3.9756  17952.26     0.01    1144.50     0.01
 27   4.0629  17227.74    -0.01    1112.26     0.06
 28   4.0765  17007.73     0.01    1109.01    -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.

13UT17    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.330    43.340    43.319
ecceobj         0.023     0.023     0.023
incobj          3.999     3.999     3.999
qmin           41.398    41.395    41.349
qmax           44.914    44.994    44.889
amean          43.080    43.091    43.070
amin           42.750    42.765    42.748
amax           43.407    43.433    43.397
emean           0.018     0.018     0.018
emin            0.000     0.000     0.001
emax            0.035     0.036     0.035
imean           2.815     2.818     2.811
imin            1.955     1.961     1.948
imax            3.661     3.662     3.661
excite_mean     0.052     0.053     0.052
fracstop        1.000     1.000     1.000
cjmean          3.087     3.087     3.087

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       174.4     175.1     174.1
kozaiamp        180.0     179.9     179.9