Orbit Fit and Astrometric record for 13UC17

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: 13UC17    
# Created Mon Dec 18 02:37:58 2017
# Orbit generated from Bernstein formalism
# Fitting   23 observations of   23
# Arc:   2.17y
# First observation: 2013/10/06
#  Last observation: 2015/12/07
Preliminary a, adot, b, bdot, g, gdot:
  -0.000077   0.083744   0.000092  -0.053210   0.061486   0.000000
# Chi-squared of fit:     6.87 DOF:   40 RMS:  0.10
# Min/Max residuals:    -0.22    0.24
# Exact a, adot, b, bdot, g, gdot:
  2.112204E-05  8.453073E-02 -1.339234E-05 -5.378538E-02  6.230030E-02 -4.564251E-03
# Covariance matrix:
  1.5721E-13 -1.4267E-13 -3.9293E-15  2.0293E-14  6.3473E-14 -2.3403E-13
 -1.4267E-13  6.9670E-13  6.9888E-14 -3.9372E-13  1.4893E-13  4.1661E-12
 -3.9293E-15  6.9888E-14  1.3799E-13 -1.5507E-13  2.3562E-14  5.5331E-13
  2.0293E-14 -3.9372E-13 -1.5507E-13  4.6225E-13 -1.3814E-13 -3.1229E-12
  6.3473E-14  1.4893E-13  2.3562E-14 -1.3814E-13  2.6082E-13  1.4051E-12
 -2.3403E-13  4.1661E-12  5.5331E-13 -3.1229E-12  1.4051E-12  3.2984E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.618016   15.214260    0.039175   -0.010698   -0.998814  2456571.901908
# Heliocentric elements and errors
Epoch:              2456570.5000  =  2013/10/05
Mean Anomaly:          340.61564 +/-     0.021
Argument of Peri:      206.22543 +/-     0.027
Long of Asc Node:      194.17666 +/-     0.000
Inclination:            32.47275 +/-     0.000
Eccentricity:         0.12915093 +/-    0.0000
Semi-Major Axis:     19.36684617 +/-    0.0007
Time of Perihelion: 2458246.7381 +/-       1.8
Perihelion:          16.86559988 +/-    0.0009
Aphelion:            21.86809246 +/-    0.0010
Period (y)               85.2308 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           16.46140545 +/-    0.0001
Ecliptic Y            4.43917813 +/-    0.0000
Ecliptic Z           -0.17334296 +/-    0.0000
Ecliptic XDOT        -0.00119918 +/-    0.0000
Ecliptic YDOT         0.00352388 +/-    0.0000
Ecliptic ZDOT        -0.00236121 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   17.05034368 +/-    0.0001
Geocenter to KBO     16.05128797 +/-    0.0001
# Hcoef: 11.48

The following table shows the complete astrometric record for 13UC17. 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 (13UC17) followed by the observatory code and reference code for the source of the astrometry.

2013 10  06.40113  00 56 59.981  +05 25 18.29  23.5r 13UC17    568  C~2NKY      
2013 10  06.48380  00 56 59.137  +05 25 10.39  23.2r 13UC17    568  C~2NKY      
2013 10  31.23096  00 53 02.356  +04 47 10.22  24.2r 13UC17    568  C~2NKY      
2013 10  31.27407  00 53 01.964  +04 47 06.50  24.0r 13UC17    568  C~2NKY      
2013 10  31.31685  00 53 01.586  +04 47 02.79  23.6r 13UC17    568  C~2NKY      
2013 11  01.25731  00 52 53.404  +04 45 41.95  23.5r 13UC17    568  C~2NKY      
2013 11  01.37789  00 52 52.336  +04 45 31.49  23.9r 13UC17    568  C~2NKY      
2013 11  05.38291  00 52 18.639  +04 39 55.63  23.8r 13UC17    568  C~2NKY      
2013 11  29.22005  00 49 46.591  +04 12 06.96  24.0r 13UC17    568  C~2NKY      
2013 12  04.24712  00 49 27.490  +04 07 43.48  23.3r 13UC17    568  C~2NKY      
2013 12  04.29457  00 49 27.324  +04 07 41.24  23.0r 13UC17    568  C~2NKY      
2013 12  06.21068  00 49 21.454  +04 06 09.98  24.0r 13UC17    568  C~2NKY      
2014 07  24.58453  01 26 13.671  +05 53 36.68  24.1r 13UC17    568  C~2NKY      
2014 08  22.54448  01 25 33.977  +05 29 05.65  23.9r 13UC17    568  C~2NKY      
2014 08  22.58310  01 25 33.780  +05 29 02.92  23.9r 13UC17    568  C~2NKY      
2014 08  27.61916  01 25 09.651  +05 23 06.98  23.8r 13UC17    568  C~2NKY      
2014 10  23.34457  01 17 00.409  +03 59 09.59  23.6r 13UC17    568  C~2NKY      
2014 10  26.43997  01 16 30.078  +03 54 34.88  23.2r 13UC17    568  C~2NKY      
2014 10  27.38331  01 16 20.943  +03 53 11.96  23.8r 13UC17    568  C~2NKY      
2014 12  17.24304  01 10 53.740  +03 01 25.52  23.8r 13UC17    568  C~2NKY      
2015 01  17.26915  01 11 43.927  +02 58 56.71  24.1r 13UC17    568  C~2NKY      
2015 08  20.50250  01 48 01.106  +04 29 12.49  23.8r 13UC17    568  C~2NKY      
2015 12  07.39011  01 33 38.467  +02 05 39.51  23.2w 13UC17    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     0.07       0.00    -0.05
  2   0.0002    -14.67    -0.02      -2.43    -0.07
  3   0.0680  -4159.08     0.10    -739.18    -0.02
  4   0.0681  -4165.93    -0.00    -740.34     0.02
  5   0.0682  -4172.57     0.06    -741.57    -0.03
  6   0.0708  -4316.70    -0.06    -768.79     0.02
  7   0.0711  -4335.47    -0.13    -772.26    -0.12
  8   0.0821  -4930.27     0.13    -886.98     0.16
  9   0.1473  -7675.91     0.06   -1544.38    -0.05
 10   0.1611  -8042.08    -0.09   -1676.49     0.03
 11   0.1612  -8045.24    -0.06   -1677.59     0.11
 12   0.1665  -8161.79    -0.08   -1727.67    -0.04
 13   0.7972  24995.19    -0.04   -8417.02    -0.05
 14   0.8765  23881.71     0.16   -9566.72     0.02
 15   0.8766  23877.91    -0.19   -9568.16     0.04
 16   0.8904  23404.35    -0.01   -9763.59     0.01
 17   1.0457  14648.88    -0.17  -11665.01    -0.03
 18   1.0542  14121.51     0.21  -11746.60     0.24
 19   1.0568  13962.63     0.05  -11771.32     0.07
 20   1.1960   8224.83     0.12  -12776.82    -0.22
 21   1.2810   8865.97    -0.08  -13203.93    -0.02
 22   1.8702  41805.45     0.02  -20676.24    -0.07
 23   2.1683  26133.32    -0.04  -23811.66     0.03

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.

13UC17    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        19.365    19.370    19.361
ecceobj         0.129     0.129     0.129
incobj         32.428    32.429    32.428
qmin           11.172    14.341    15.080
qmax           26.761    23.734    22.822
amean          19.195    19.155    19.166
amin           18.528    18.320    18.660
amax           19.619    19.547    19.562
emean           0.254     0.182     0.123
emin            0.090     0.116     0.060
emax            0.407     0.237     0.202
imean          30.543    31.800    32.283
imin           27.716    30.956    31.358
imax           32.962    32.883    33.396
excite_mean     0.575     0.558     0.549
fracstop        0.144     0.091     0.142
cjmean          2.892     2.904     2.908

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       193.1     178.2     214.5
kozaiamp        180.0     179.6     179.9