Orbit Fit and Astrometric record for 13SK100

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: 13SK100   
# Created Mon Dec 18 02:37:57 2017
# Orbit generated from Bernstein formalism
# Fitting   38 observations of   38
# Arc:   4.07y
# First observation: 2013/08/04
#  Last observation: 2017/08/30
Preliminary a, adot, b, bdot, g, gdot:
  -0.000151   0.020809  -0.000033   0.010231   0.022075   0.000000
# Chi-squared of fit:    11.38 DOF:   70 RMS:  0.10
# Min/Max residuals:    -0.35    0.21
# Exact a, adot, b, bdot, g, gdot:
  1.400483E-05  2.056920E-02  8.136426E-06  1.012781E-02  2.203371E-02 -1.011102E-03
# Covariance matrix:
  1.1327E-13 -4.9339E-14  4.1034E-15 -1.1075E-14  6.7014E-14 -2.7018E-13
 -4.9339E-14  1.9318E-13 -2.7829E-14  8.9696E-14  6.2950E-14  2.2423E-12
  4.1034E-15 -2.7829E-14  6.3381E-14 -3.8185E-14 -1.0878E-14 -3.7423E-13
 -1.1075E-14  8.9696E-14 -3.8185E-14  7.4630E-14  3.8341E-14  1.2096E-12
  6.7014E-14  6.2950E-14 -1.0878E-14  3.8341E-14  1.4087E-13  9.6864E-13
 -2.7018E-13  2.2423E-12 -3.7423E-13  1.2096E-12  9.6864E-13  3.0250E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.277484   13.661630    0.894731   -0.019141   -0.481975  2456508.998978
# Heliocentric elements and errors
Epoch:              2456500.5000  =  2013/07/27
Mean Anomaly:          350.30740 +/-     0.035
Argument of Peri:       12.21453 +/-     0.063
Long of Asc Node:       17.11585 +/-     0.000
Inclination:            26.28091 +/-     0.000
Eccentricity:         0.26853057 +/-    0.0001
Semi-Major Axis:     62.11670393 +/-    0.0062
Time of Perihelion: 2461314.9733 +/-      17.2
Perihelion:          45.43647025 +/-    0.0070
Aphelion:            78.79693760 +/-    0.0095
Period (y)              489.5768 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           44.74594448 +/-    0.0008
Ecliptic Y            9.95853911 +/-    0.0002
Ecliptic Z           -1.80314721 +/-    0.0000
Ecliptic XDOT        -0.00068328 +/-    0.0000
Ecliptic YDOT         0.00246488 +/-    0.0000
Ecliptic ZDOT         0.00126259 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.87617452 +/-    0.0007
Geocenter to KBO     45.38500473 +/-    0.0008
# Hcoef:  7.64

The following table shows the complete astrometric record for 13SK100. 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 (13SK100) followed by the observatory code and reference code for the source of the astrometry.

2013 08  04.49820  00 53 49.712  +03 17 29.38  24.3r 13SK100   568  C~2NKL      
2013 08  05.47365  00 53 48.048  +03 17 22.39  23.8r 13SK100   568  C~2NKL      
2013 08  05.51257  00 53 47.967  +03 17 22.19  24.1r 13SK100   568  C~2NKL      
2013 08  08.45262  00 53 42.597  +03 16 58.07  24.2r 13SK100   568  C~2NKL      
2013 08  08.49147  00 53 42.510  +03 16 57.52  24.0r 13SK100   568  C~2NKL      
2013 09  01.42327  00 52 37.748  +03 11 43.01  24.1r 13SK100   568  C~2NKL      
2013 09  01.46210  00 52 37.605  +03 11 42.37  23.9r 13SK100   568  C~2NKL      
2013 09  05.40278  00 52 23.888  +03 10 33.78  24.1r 13SK100   568  C~2NKL      
2013 09  05.44158  00 52 23.747  +03 10 32.85  24.2r 13SK100   568  C~2NKL      
2013 09  29.32343  00 50 48.768  +03 02 39.84  24.1r 13SK100   568  C~2NKL      
2013 09  29.37258  00 50 48.546  +03 02 38.66  24.1r 13SK100   568  C~2NKL      
2013 09  29.41164  00 50 48.374  +03 02 37.98  24.0r 13SK100   568  C~2NKL      
2013 10  02.40208  00 50 35.613  +03 01 35.25  24.3r 13SK100   568  C~2NKL      
2013 10  03.35740  00 50 31.525  +03 01 15.29  23.8r 13SK100   568  C~2NKL      
2013 10  03.41811  00 50 31.266  +03 01 14.03  23.9r 13SK100   568  C~2NKL      
2013 10  04.47974  00 50 26.703  +03 00 51.99  24.4r 13SK100   568  C~2NKL      
2013 10  04.49010  00 50 26.648  +03 00 51.60  24.4r 13SK100   568  C~2NKL      
2013 10  09.46022  00 50 05.310  +02 59 08.71  23.9r 13SK100   568  C~2NKL      
2013 10  09.46522  00 50 05.290  +02 59 08.53  23.6r 13SK100   568  C~2NKL      
2013 11  27.26350  00 47 09.235  +02 46 53.29  24.5r 13SK100   568  C~2NKL      
2013 11  27.30798  00 47 09.129  +02 46 52.93        13SK100   568  C~2NKL      
2013 12  05.22182  00 46 52.444  +02 46 17.26  24.2r 13SK100   568  C~2NKL      
2014 06  25.57715  00 57 18.885  +04 14 38.39  24.4r 13SK100   568  C~2NKL      
2014 06  26.57603  00 57 20.381  +04 14 51.38  24.0r 13SK100   568  C~2NKL      
2014 07  23.56365  00 57 31.103  +04 17 38.63  24.2r 13SK100   568  C~2NKL      
2014 07  27.54407  00 57 27.820  +04 17 33.34  23.9r 13SK100   568  C~2NKL      
2014 08  22.54026  00 56 37.961  +04 14 09.73  24.6r 13SK100   568  C~2NKL      
2014 08  27.61513  00 56 23.044  +04 12 59.77  24.1r 13SK100   568  C~2NKL      
2014 10  23.29554  00 52 37.085  +03 54 51.44  24.0r 13SK100   568  C~2NKL      
2014 10  27.26220  00 52 20.898  +03 53 37.50  24.2r 13SK100   568  C~2NKL      
2014 11  24.25164  00 50 44.685  +03 47 04.07  24.2r 13SK100   568  C~2NKL      
2014 11  25.24784  00 50 42.073  +03 46 55.27  24.2r 13SK100   568  C~2NKL      
2015 01  18.23045  00 50 13.759  +03 51 22.34  24.3r 13SK100   568  C~2NKL      
2015 08  20.52724  01 00 13.344  +05 14 28.02  24.0r 13SK100   568  C~2NKL      
2017 07  23.62323  01 07 56.149  +07 15 30.23        13SK100   568  C~2NKL      
2017 08  25.53214  01 07 00.034  +07 13 14.94  24.3w 13SK100   568  C~2NKL      
2017 08  30.47385  01 06 45.266  +07 12 15.96  24.2w 13SK100   568  C~2NKL      
2017 08  30.52649  01 06 45.105  +07 12 15.22  24.1w 13SK100   568  C~2NKL      

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     0.16       0.00    -0.18
  2   0.0027    -25.68    -0.00       3.20     0.06
  3   0.0028    -26.88    -0.12       3.49     0.21
  4   0.0108   -110.36     0.12      12.39    -0.02
  5   0.0109   -111.78    -0.09      12.38    -0.16
  6   0.0765  -1127.78     0.00      98.07    -0.02
  7   0.0766  -1130.00    -0.11      98.31     0.05
  8   0.0873  -1345.97     0.01     114.67     0.09
  9   0.0875  -1348.28    -0.08     114.64    -0.13
 10   0.1528  -2843.15     0.20     230.11     0.07
 11   0.1530  -2846.68     0.01     230.31    -0.01
 12   0.1531  -2849.32     0.02     230.68     0.13
 13   0.1613  -3049.87    -0.02     247.00    -0.06
 14   0.1639  -3114.07     0.01     252.36    -0.06
 15   0.1641  -3118.13     0.09     252.70    -0.09
 16   0.1670  -3189.70     0.09     258.90     0.05
 17   0.1670  -3190.61    -0.12     258.86    -0.05
 18   0.1806  -3525.21     0.05     288.04     0.08
 19   0.1806  -3525.56     0.05     287.99     0.00
 20   0.3142  -6243.16    -0.08     634.72     0.04
 21   0.3143  -6244.77    -0.06     635.00    -0.05
 22   0.3360  -6489.20    -0.10     699.32    -0.08
 23   0.8900   4213.97    -0.01    1951.82     0.01
 24   0.8928   4239.64     0.02    1955.16    -0.03
 25   0.9666   4452.29     0.11    2047.54     0.17
 26   0.9775   4404.93    -0.18    2061.63     0.12
 27   1.0487   3638.03    -0.14    2161.89     0.08
 28   1.0626   3405.11     0.06    2183.59     0.07
 29   1.2178   -134.02     0.03    2488.29     0.08
 30   1.2286   -386.01     0.08    2514.00    -0.02
 31   1.3053  -1866.04    -0.11    2709.75    -0.08
 32   1.3080  -1905.49     0.19    2716.81    -0.35
 33   1.4558  -2192.52    -0.05    3127.50    -0.02
 34   2.0425   8009.17    -0.03    4260.05     0.09
 35   3.9675  17211.95     0.00    8339.58     0.08
 36   4.0576  16382.78    -0.03    8533.22    -0.00
 37   4.0711  16155.61    -0.02    8562.52     0.01
 38   4.0713  16153.10     0.07    8562.75    -0.10

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.

13SK100    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        62.564    62.582    62.546
ecceobj         0.273     0.274     0.273
incobj         26.216    26.216    26.216
qmin           44.229    44.229    44.232
qmax           80.538    80.636    80.544
amean          61.977    61.995    61.960
amin           61.325    61.369    61.333
amax           62.753    62.771    62.740
emean           0.270     0.270     0.270
emin            0.257     0.257     0.257
emax            0.284     0.285     0.284
imean          26.149    26.147    26.150
imin           25.878    25.868    25.872
imax           26.460    26.465    26.466
excite_mean     0.517     0.517     0.517
fracstop        1.000     1.000     1.000
cjmean          2.966     2.966     2.966

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       181.1     181.1     181.1
kozaiamp        169.4     169.4     169.3