Orbit Fit and Astrometric record for 13UZ16

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: 13UZ16    
# Created Mon Dec 18 02:37:58 2017
# Orbit generated from Bernstein formalism
# Fitting   40 observations of   40
# Arc:   4.05y
# First observation: 2013/08/11
#  Last observation: 2017/08/30
Preliminary a, adot, b, bdot, g, gdot:
  -0.000176   0.020224  -0.000036   0.003948   0.022598   0.000000
# Chi-squared of fit:    14.00 DOF:   74 RMS:  0.10
# Min/Max residuals:    -0.47    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.487117E-05  1.973001E-02  3.526778E-06  3.850682E-03  2.240666E-02 -5.410209E-03
# Covariance matrix:
  1.3648E-13 -3.9220E-14  8.8484E-16 -1.1943E-15  8.1364E-14 -6.5923E-14
 -3.9220E-14  1.3864E-13 -8.8535E-15  2.5344E-14  4.8193E-14  1.6690E-12
  8.8484E-16 -8.8535E-15  6.0679E-14 -2.6339E-14 -4.0668E-15 -1.3036E-13
 -1.1943E-15  2.5344E-14 -2.6339E-14  3.0512E-14  1.3215E-14  3.7589E-13
  8.1364E-14  4.8193E-14 -4.0668E-15  1.3215E-14  1.2346E-13  8.8525E-13
 -6.5923E-14  1.6690E-12 -1.3036E-13  3.7589E-13  8.8525E-13  2.4780E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.751500   15.389787    0.848437   -0.017005   -0.557230  2456516.004448
# Heliocentric elements and errors
Epoch:              2456510.5000  =  2013/08/06
Mean Anomaly:          283.97013 +/-     0.034
Argument of Peri:       99.26115 +/-     0.014
Long of Asc Node:       23.08583 +/-     0.000
Inclination:            11.20288 +/-     0.000
Eccentricity:         0.27985788 +/-    0.0002
Semi-Major Axis:     44.75027985 +/-    0.0061
Time of Perihelion: 2479603.1525 +/-       9.1
Perihelion:          32.22656158 +/-    0.0108
Aphelion:            57.27399812 +/-    0.0126
Period (y)              299.3656 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           43.77156674 +/-    0.0007
Ecliptic Y           11.17153220 +/-    0.0002
Ecliptic Z           -1.36389368 +/-    0.0000
Ecliptic XDOT        -0.00126921 +/-    0.0000
Ecliptic YDOT         0.00215191 +/-    0.0000
Ecliptic ZDOT         0.00049064 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.19528064 +/-    0.0007
Geocenter to KBO     44.62958484 +/-    0.0007
# Hcoef:  7.85

The following table shows the complete astrometric record for 13UZ16. 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 (13UZ16) followed by the observatory code and reference code for the source of the astrometry.

2013 08  11.50367  00 59 24.148  +04 26 35.76  24.4r 13UZ16    568  C~2NKX      
2013 08  30.42008  00 58 34.186  +04 21 33.36  24.8r 13UZ16    568  C~2NKX      
2013 08  31.42413  00 58 30.927  +04 21 13.77  24.6r 13UZ16    568  C~2NKX      
2013 08  31.46730  00 58 30.775  +04 21 12.90  24.1r 13UZ16    568  C~2NKX      
2013 09  04.40430  00 58 17.525  +04 19 53.83  24.0r 13UZ16    568  C~2NKX      
2013 09  04.44707  00 58 17.366  +04 19 52.66  23.8r 13UZ16    568  C~2NKX      
2013 10  05.37632  00 56 13.537  +04 07 48.76  24.0r 13UZ16    568  C~2NKX      
2013 10  06.37972  00 56 09.185  +04 07 23.97  24.4r 13UZ16    568  C~2NKX      
2013 10  06.44410  00 56 08.903  +04 07 22.33  24.3r 13UZ16    568  C~2NKX      
2013 10  09.50879  00 55 55.645  +04 06 06.63  24.1r 13UZ16    568  C~2NKX      
2013 10  31.22708  00 54 24.803  +03 57 42.11  23.9r 13UZ16    568  C~2NKX      
2013 10  31.27019  00 54 24.634  +03 57 41.21  24.2r 13UZ16    568  C~2NKX      
2013 10  31.31297  00 54 24.463  +03 57 40.32  24.3r 13UZ16    568  C~2NKX      
2013 11  01.25343  00 54 20.788  +03 57 20.44  24.8r 13UZ16    568  C~2NKX      
2013 11  01.37273  00 54 20.337  +03 57 17.99  24.4r 13UZ16    568  C~2NKX      
2013 11  02.22554  00 54 17.046  +03 57 00.13  24.8r 13UZ16    568  C~2NKX      
2013 11  05.37780  00 54 05.086  +03 55 56.60  24.3r 13UZ16    568  C~2NKX      
2013 11  06.39952  00 54 01.294  +03 55 36.68  23.9r 13UZ16    568  C~2NKX      
2013 11  06.40464  00 54 01.279  +03 55 36.60  23.7r 13UZ16    568  C~2NKX      
2013 11  07.43574  00 53 57.500  +03 55 16.77  24.4r 13UZ16    568  C~2NKX      
2013 12  04.24324  00 52 40.299  +03 49 03.75  24.1r 13UZ16    568  C~2NKX      
2013 12  04.29069  00 52 40.190  +03 49 03.27  24.1r 13UZ16    568  C~2NKX      
2014 06  27.57448  01 03 25.594  +05 05 52.44  24.0r 13UZ16    568  C~2NKX      
2014 06  28.57952  01 03 27.163  +05 06 02.26  24.0r 13UZ16    568  C~2NKX      
2014 07  24.53752  01 03 39.584  +05 07 22.59  24.5r 13UZ16    568  C~2NKX      
2014 07  27.56807  01 03 37.490  +05 07 10.25  24.1r 13UZ16    568  C~2NKX      
2014 08  22.61348  01 02 51.001  +05 02 33.53  24.1r 13UZ16    568  C~2NKX      
2014 08  28.45040  01 02 34.212  +05 00 54.74  24.3r 13UZ16    568  C~2NKX      
2014 10  23.37571  00 58 50.213  +04 39 29.64  24.0r 13UZ16    568  C~2NKX      
2014 10  27.41437  00 58 33.399  +04 37 57.22  24.0r 13UZ16    568  C~2NKX      
2014 11  24.27889  00 56 54.747  +04 29 22.75  24.5r 13UZ16    568  C~2NKX      
2014 11  25.30520  00 56 51.898  +04 29 09.37  24.5r 13UZ16    568  C~2NKX      
2015 01  17.27935  00 56 17.107  +04 29 26.03  24.7r 13UZ16    568  C~2NKX      
2015 08  20.53131  01 06 52.620  +05 42 03.77  24.2r 13UZ16    568  C~2NKX      
2015 12  07.36957  01 00 16.615  +05 05 53.09  24.6w 13UZ16    568  C~2NKX      
2015 12  07.37370  01 00 16.605  +05 05 53.01  24.6w 13UZ16    568  C~2NKX      
2017 07  24.59587  01 15 29.563  +07 03 54.78  24.3w 13UZ16    568  C~2NKX      
2017 08  25.52748  01 14 39.033  +06 59 32.35  24.2w 13UZ16    568  C~2NKX      
2017 08  30.46920  01 14 24.676  +06 58 13.27  24.5w 13UZ16    568  C~2NKX      
2017 08  30.52183  01 14 24.509  +06 58 12.47  24.4w 13UZ16    568  C~2NKX      

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    -0.20       0.00    -0.17
  2   0.0518   -806.05     0.22       8.41     0.02
  3   0.0545   -858.58     0.06       9.10    -0.03
  4   0.0547   -861.01    -0.06       9.17    -0.01
  5   0.0654  -1074.36     0.09      12.49     0.13
  6   0.0656  -1077.01    -0.13      12.32    -0.09
  7   0.1502  -3065.50     0.14      58.09     0.05
  8   0.1530  -3135.15    -0.08      60.32     0.15
  9   0.1532  -3139.67    -0.08      60.44     0.10
 10   0.1615  -3351.93    -0.11      67.10    -0.06
 11   0.2210  -4801.17    -0.12     126.26     0.10
 12   0.2211  -4803.85    -0.08     126.41     0.10
 13   0.2212  -4806.55    -0.08     126.57     0.11
 14   0.2238  -4864.99    -0.20     129.47     0.05
 15   0.2241  -4872.17     0.11     129.82    -0.04
 16   0.2265  -4924.52     0.02     132.36    -0.18
 17   0.2351  -5114.26     0.06     142.89    -0.09
 18   0.2379  -5174.33     0.00     146.43     0.00
 19   0.2379  -5174.57     0.07     146.45    -0.00
 20   0.2407  -5234.43     0.00     150.00     0.03
 21   0.3141  -6445.17     0.21     252.51    -0.04
 22   0.3143  -6446.87     0.03     252.70    -0.08
 23   0.8763   4238.01     0.10     790.16     0.08
 24   0.8791   4263.44     0.14     790.24     0.04
 25   0.9501   4465.72    -0.06     793.32     0.05
 26   0.9584   4432.08    -0.19     793.91     0.03
 27   1.0297   3684.18     0.07     804.61    -0.47
 28   1.0457   3414.53     0.12     809.59     0.03
 29   1.1988   -170.60    -0.07     909.55     0.09
 30   1.2099   -438.19     0.03     921.00    -0.01
 31   1.2862  -1997.71     0.07    1014.46    -0.05
 32   1.2890  -2042.18    -0.01    1018.54     0.17
 33   1.4340  -2515.87    -0.01    1234.53     0.05
 34   2.0233   7928.65     0.01    1613.86     0.01
 35   2.3213   1630.51    -0.02    1874.60    -0.02
 36   2.3213   1630.34    -0.06    1874.58    -0.06
 37   3.9510  16958.32     0.01    3233.36    -0.05
 38   4.0384  16157.50     0.02    3274.69    -0.03
 39   4.0519  15928.31    -0.02    3282.31     0.01
 40   4.0521  15925.69    -0.01    3282.51     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.

13UZ16    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        44.941    44.958    44.925
ecceobj         0.277     0.277     0.276
incobj         11.169    11.169    11.169
qmin           29.948    28.657    29.316
qmax           63.677    64.067    63.256
amean          45.123    45.116    44.227
amin           41.670    36.566    37.134
amax           47.861    47.581    47.769
emean           0.299     0.306     0.287
emin            0.237     0.181     0.180
emax            0.343     0.351     0.342
imean          10.997    10.350    10.453
imin            8.404     5.707     6.919
imax           12.829    14.854    12.743
excite_mean     0.355     0.356     0.340
fracstop        0.942     0.632     0.959
cjmean          2.955     2.957     2.960

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       186.1     187.5     187.2
kozaiamp        180.0     180.0     179.9