Orbit Fit and Astrometric record for 13US17

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: 13US17    
# Created Fri Dec 15 02:37:54 2017
# Orbit generated from Bernstein formalism
# Fitting   29 observations of   31
# Arc:   2.27y
# First observation: 2013/08/30
#  Last observation: 2015/12/07
Preliminary a, adot, b, bdot, g, gdot:
  -0.000119   0.022267  -0.000003  -0.000156   0.023378   0.000000
# Chi-squared of fit:    14.11 DOF:   52 RMS:  0.12
# Min/Max residuals:    -0.40    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.534089E-05  2.237579E-02 -1.175254E-06 -1.547126E-04  2.358674E-02  1.093618E-03
# Covariance matrix:
  1.5047E-13  3.8865E-15  3.2983E-16 -1.2020E-15  1.2632E-13  5.2664E-12
  3.8865E-15  5.5250E-13  1.2771E-15 -3.8024E-15  3.9257E-13  2.4686E-11
  3.2983E-16  1.2771E-15  1.1303E-13 -9.6545E-14  1.2713E-15  7.7538E-14
 -1.2020E-15 -3.8024E-15 -9.6545E-14  1.5012E-13 -4.2887E-15 -2.1500E-13
  1.2632E-13  3.9257E-13  1.2713E-15 -4.2887E-15  4.4786E-13  2.2037E-11
  5.2664E-12  2.4686E-11  7.7538E-14 -2.1500E-13  2.2037E-11  1.5788E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.931438   16.544256    0.644842   -0.039766   -0.777416  2456534.940388
# Heliocentric elements and errors
Epoch:              2456530.5000  =  2013/08/26
Mean Anomaly:          110.42518 +/-     1.270
Argument of Peri:      147.17251 +/-     1.256
Long of Asc Node:      114.48534 +/-     0.019
Inclination:             2.91246 +/-     0.000
Eccentricity:         0.03408661 +/-    0.0016
Semi-Major Axis:     42.62922315 +/-    0.0058
Time of Perihelion: 2425346.9766 +/-     358.5
Perihelion:          41.17613745 +/-    0.0676
Aphelion:            44.08230885 +/-    0.0677
Period (y)              278.3360 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           41.51772001 +/-    0.0012
Ecliptic Y           11.66353655 +/-    0.0003
Ecliptic Z           -2.16822530 +/-    0.0001
Ecliptic XDOT        -0.00062514 +/-    0.0000
Ecliptic YDOT         0.00252453 +/-    0.0000
Ecliptic ZDOT        -0.00002429 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.17939741 +/-    0.0011
Geocenter to KBO     42.39670840 +/-    0.0012
# Hcoef:  8.06

The following table shows the complete astrometric record for 13US17. 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 (13US17) followed by the observatory code and reference code for the source of the astrometry.

2013 08  30.43961  01 05 29.351  +03 47 44.78  23.9r 13US17    568  C~2NKa      
2013 08  31.44379  01 05 26.180  +03 47 21.87  24.5r 13US17    568  C~2NKa      
2013 08  31.48677  01 05 26.059  +03 47 20.78  24.6r 13US17    568  C~2NKa      
2013 08  31.50475  01 05 25.955  +03 47 20.29  24.8r 13US17    568  C~2NKa      
2013 09  04.42370  01 05 13.007  +03 45 49.37  24.4r 13US17    568  C~2NKa      
2013 09  04.46654  01 05 12.841  +03 45 48.11  24.3r 13US17    568  C~2NKa      
2013 10  06.40501  01 03 04.002  +03 31 41.23  24.3r 13US17    568  C~2NKa      
2013 10  06.48768  01 03 03.626  +03 31 39.00  24.1r 13US17    568  C~2NKa      
2013 10  31.24669  01 01 17.031  +03 20 54.43  24.2r 13US17    568  C~2NKa      
2013 10  31.28968  01 01 16.828  +03 20 53.46  24.0r 13US17    568  C~2NKa      
2013 10  31.33240  01 01 16.658  +03 20 52.29  24.3r 13US17    568  C~2NKa      
2013 11  01.27294  01 01 12.867  +03 20 30.47  23.9r 13US17    568  C~2NKa      
2013 11  01.39814  01 01 12.350  +03 20 27.57  24.6r 13US17    568  C~2NKa      
2013 11  29.31322  00 59 39.521  +03 12 06.51  24.8r 13US17    568  C~2NKa      
2013 12  04.26342  00 59 28.209  +03 11 13.80  24.2r 13US17    568  C~2NKa      
2013 12  04.31568  00 59 28.091  +03 11 13.19  24.1r 13US17    568  C~2NKa      
2014 06  27.59391  01 10 58.119  +04 25 20.88  24.2r 13US17    568  C~2NKa      
2014 06  28.59898  01 11 00.033  +04 25 28.18  24.4r 13US17    568  C~2NKa      
2014 07  24.55698  01 11 20.373  +04 25 37.54  24.8r 13US17    568  C~2NKa      
2014 07  27.58768  01 11 19.055  +04 25 16.45  23.6r 13US17    568  C~2NKa      
2014 08  22.55261  01 10 37.855  +04 19 20.32  24.6r 13US17    568  C~2NKa      
2014 08  28.41447  01 10 21.779  +04 17 22.33  24.4r 13US17    568  C~2NKa      
2014 10  23.36792  01 06 37.629  +03 53 15.62  23.9r 13US17    568  C~2NKa      
2014 10  25.28038  01 06 29.435  +03 52 26.98  23.7r 13US17    568  C~2NKa      
2014 10  27.31342  01 06 20.817  +03 51 36.25  24.2r 13US17    568  C~2NKa      
2014 10  27.36433  01 06 20.574  +03 51 34.93  24.2r 13US17    568  C~2NKa      
2014 10  27.40661  01 06 20.403  +03 51 33.91  24.0r 13US17    568  C~2NKa      
2014 11  24.23611  01 04 38.455  +03 42 08.52  23.7r 13US17    568  C~2NKa      
2014 11  25.23226  01 04 35.583  +03 41 53.97  25.0r 13US17    568  C~2NKa      
2015 01  17.24366  01 03 56.267  +03 41 31.17  24.5r 13US17    568  C~2NKa      
2015 12  07.38604  01 08 49.706  +04 08 13.52  24.5w 13US17    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    -0.07       0.00     0.22
  2   0.0027    -52.61     0.02      -3.03    -0.09
  3   0.0029    -54.70     0.25      -3.35    -0.31
  4   0.0029    -56.33    -0.40      -3.21    -0.13
  5   0.0136   -270.16     0.19     -13.16     0.03
  6   0.0138   -272.94    -0.13     -13.37    -0.10
  7   0.1012  -2378.99     0.08     -58.14     0.00
  8   0.1014  -2385.04     0.02     -58.04     0.08
  9   0.1692  -4106.69 (   0.43)    -42.20 (  -0.08)
 10   0.1693  -4109.87     0.09     -41.93     0.10
 11   0.1695  -4112.68     0.11     -42.03    -0.09
 12   0.1720  -4173.50     0.13     -40.43     0.05
 13   0.1724  -4181.76     0.06     -40.15     0.07
 14   0.2488  -5658.65 (  -0.21)     30.10 (   0.51)
 15   0.2624  -5835.46    -0.13      46.42     0.12
 16   0.2625  -5837.33    -0.23      46.53     0.03
 17   0.8245   5408.72     0.00     209.71     0.06
 18   0.8273   5437.99     0.04     205.57    -0.01
 19   0.8983   5723.06     0.04      98.44    -0.07
 20   0.9066   5696.79     0.01      86.43     0.15
 21   0.9777   4990.95    -0.19      -8.42    -0.03
 22   0.9938   4723.53     0.02     -25.98     0.13
 23   1.1470   1070.76    -0.03     -84.60     0.08
 24   1.1522    938.85    -0.01     -82.73     0.00
 25   1.1578    800.28     0.22     -80.35    -0.06
 26   1.1579    796.41    -0.14     -80.19     0.03
 27   1.1580    793.66     0.02     -80.15    -0.01
 28   1.2342   -832.49    -0.00     -19.51    -0.13
 29   1.2369   -877.78     0.17     -16.52    -0.16
 30   1.3821  -1430.29    -0.13     187.51     0.03
 31   2.2695   3240.40    -0.00      -8.64    -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.

13US17    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        42.859    42.881    42.838
ecceobj         0.035     0.039     0.031
incobj          2.912     2.912     2.912
qmin           40.515    40.374    40.653
qmax           44.911    45.098    44.680
amean          42.617    42.638    42.596
amin           42.293    42.309    42.269
amax           42.949    42.973    42.924
emean           0.027     0.032     0.024
emin            0.003     0.007     0.001
emax            0.046     0.050     0.041
imean           1.891     1.898     1.887
imin            0.743     0.742     0.744
imax            2.933     2.960     2.925
excite_mean     0.045     0.048     0.043
fracstop        1.000     1.000     1.000
cjmean          3.083     3.083     3.083

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       173.9     171.4     180.2
kozaiamp        180.0     180.0     180.0