Orbit Fit and Astrometric record for 13UW16

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: 13UW16    
# Created Sat Dec 16 02:37:57 2017
# Orbit generated from Bernstein formalism
# Fitting   56 observations of   57
# Arc:   3.98y
# First observation: 2013/08/02
#  Last observation: 2017/07/24
Preliminary a, adot, b, bdot, g, gdot:
  -0.000045   0.020770   0.000001   0.000314   0.022479   0.000000
# Chi-squared of fit:    16.86 DOF:  106 RMS:  0.10
# Min/Max residuals:    -0.30    0.29
# Exact a, adot, b, bdot, g, gdot:
  1.465297E-05  2.071824E-02  1.249487E-07  3.175131E-04  2.237240E-02 -1.054449E-03
# Covariance matrix:
  1.1052E-13 -2.0303E-14  9.4210E-16 -4.6396E-16  6.8829E-14  3.2341E-14
 -2.0303E-14  1.0677E-13 -2.6591E-16  1.6434E-15  4.7071E-14  1.4971E-12
  9.4210E-16 -2.6591E-16  4.6445E-14 -2.7611E-14  7.9931E-16 -7.6103E-15
 -4.6396E-16  1.6434E-15 -2.7611E-14  3.7075E-14  4.6757E-16  3.6525E-14
  6.8829E-14  4.7071E-14  7.9931E-16  4.6757E-16  9.6263E-14  8.8512E-13
  3.2341E-14  1.4971E-12 -7.6103E-15  3.6525E-14  8.8512E-13  3.2382E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.800488   14.604255    0.917873   -0.013716   -0.437215  2456507.005448
# Heliocentric elements and errors
Epoch:              2456500.5000  =  2013/07/27
Mean Anomaly:          262.15713 +/-     0.060
Argument of Peri:       41.49720 +/-     0.055
Long of Asc Node:       78.14312 +/-     0.014
Inclination:             1.97156 +/-     0.000
Eccentricity:         0.07511290 +/-    0.0003
Semi-Major Axis:     44.44911278 +/-    0.0025
Time of Perihelion: 2485918.9476 +/-      17.9
Perihelion:          41.11041106 +/-    0.0119
Aphelion:            47.78781449 +/-    0.0120
Period (y)              296.3486 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           43.88692130 +/-    0.0006
Ecliptic Y           10.48984741 +/-    0.0001
Ecliptic Z           -1.40432690 +/-    0.0000
Ecliptic XDOT        -0.00076914 +/-    0.0000
Ecliptic YDOT         0.00242047 +/-    0.0000
Ecliptic ZDOT         0.00004303 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.14499854 +/-    0.0006
Geocenter to KBO     44.69793402 +/-    0.0006
# Hcoef:  7.34

The following table shows the complete astrometric record for 13UW16. 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 (13UW16) followed by the observatory code and reference code for the source of the astrometry.

2013 08  02.50467  00 56 34.318  +04 05 43.96  23.8r 13UW16    568  C~2NKW      
2013 08  02.54741  00 56 34.253  +04 05 43.47  23.8r 13UW16    568  C~2NKW      
2013 08  11.50367  00 56 19.255  +04 03 50.76  23.9r 13UW16    568  C~2NKW      
2013 08  30.42008  00 55 29.956  +03 58 09.06  23.7r 13UW16    568  C~2NKW      
2013 08  31.42413  00 55 26.746  +03 57 47.52  23.7r 13UW16    568  C~2NKW      
2013 08  31.46730  00 55 26.603  +03 57 46.55  23.9r 13UW16    568  C~2NKW      
2013 09  04.40430  00 55 13.552  +03 56 19.25  23.1r 13UW16    568  C~2NKW      
2013 09  04.44707  00 55 13.386  +03 56 18.43  23.6r 13UW16    568  C~2NKW      
2013 10  05.37122  00 53 11.725  +03 43 17.14  23.8r 13UW16    568  C~2NKW      
2013 10  05.37632  00 53 11.690  +03 43 17.13  23.9r 13UW16    568  C~2NKW      
2013 10  06.37972  00 53 07.449  +03 42 50.55  23.5r 13UW16    568  C~2NKW      
2013 10  06.44410  00 53 07.184  +03 42 48.90  23.6r 13UW16    568  C~2NKW      
2013 10  09.50414  00 52 54.218  +03 41 28.26  23.9r 13UW16    568  C~2NKW      
2013 10  09.50879  00 52 54.205  +03 41 28.39  23.6r 13UW16    568  C~2NKW      
2013 10  29.29940  00 51 33.154  +03 33 14.25  24.0r 13UW16    568  C~2NKW      
2013 10  31.22708  00 51 25.738  +03 32 30.36  24.1r 13UW16    568  C~2NKW      
2013 10  31.27019  00 51 25.589  +03 32 29.24  23.6r 13UW16    568  C~2NKW      
2013 10  31.31297  00 51 25.422  +03 32 28.35  23.6r 13UW16    568  C~2NKW      
2013 11  01.25343  00 51 21.875  +03 32 07.36  23.8r 13UW16    568  C~2NKW      
2013 11  01.37273  00 51 21.414  +03 32 04.61  23.9r 13UW16    568  C~2NKW      
2013 11  02.22554  00 51 18.266  +03 31 45.74  23.9r 13UW16    568  C~2NKW      
2013 11  02.24797  00 51 18.137  +03 31 45.13  23.9r 13UW16    568  C~2NKW      
2013 11  02.26953  00 51 18.070  +03 31 44.82  24.3r 13UW16    568  C~2NKW      
2013 11  02.29201  00 51 17.968  +03 31 44.25  23.9r 13UW16    568  C~2NKW      
2013 11  05.35173  00 51 06.758  +03 30 38.06  23.5r 13UW16    568  C~2NKW      
2013 11  05.37780  00 51 06.669  +03 30 37.67  24.0r 13UW16    568  C~2NKW      
2013 11  06.39952  00 51 03.023  +03 30 16.22  23.9r 13UW16    568  C~2NKW      
2013 11  06.40464  00 51 02.993  +03 30 16.33  23.8r 13UW16    568  C~2NKW      
2013 11  07.43574  00 50 59.359  +03 29 55.03  23.5r 13UW16    568  C~2NKW      
2013 11  29.21607  00 49 56.184  +03 24 01.81  23.7r 13UW16    568  C~2NKW      
2013 12  04.24324  00 49 45.994  +03 23 10.07  23.7r 13UW16    568  C~2NKW      
2013 12  04.29069  00 49 45.902  +03 23 09.59  24.0r 13UW16    568  C~2NKW      
2013 12  05.31529  00 49 44.056  +03 23 00.41  23.6r 13UW16    568  C~2NKW      
2014 06  27.57448  01 00 50.187  +04 34 57.28  23.9r 13UW16    568  C~2NKW      
2014 06  28.57952  01 00 51.773  +04 35 04.81  23.9r 13UW16    568  C~2NKW      
2014 07  23.55193  01 01 05.310  +04 35 30.19  23.8r 13UW16    568  C~2NKW      
2014 07  27.53111  01 01 02.856  +04 35 05.43  23.4r 13UW16    568  C~2NKW      
2014 08  22.61348  01 00 17.389  +04 29 29.60  23.7r 13UW16    568  C~2NKX      
2014 08  23.47191  01 00 15.108  +04 29 14.09  25.5u 13UW16    568  C~2NKX      
2014 08  28.45040  01 00 00.937  +04 27 37.75  23.7r 13UW16    568  C~2NKX      
2014 10  23.27749  00 56 22.619  +04 04 35.37  23.7r 13UW16    568  C~2NKX      
2014 10  23.33112  00 56 22.393  +04 04 33.88  23.7r 13UW16    568  C~2NKX      
2014 10  23.38450  00 56 22.158  +04 04 32.87  23.7r 13UW16    568  C~2NKX      
2014 10  25.25487  00 56 14.589  +04 03 47.07  23.7r 13UW16    568  C~2NKX      
2014 10  25.35645  00 56 14.156  +04 03 44.55  23.8r 13UW16    568  C~2NKX      
2014 10  25.45680  00 56 13.738  +04 03 42.14  23.3r 13UW16    568  C~2NKX      
2014 10  27.24490  00 56 06.590  +04 02 59.20  23.6r 13UW16    568  C~2NKX      
2014 10  27.30309  00 56 06.346  +04 02 57.80  23.7r 13UW16    568  C~2NKX      
2014 10  27.36937  00 56 06.077  +04 02 56.22  23.6r 13UW16    568  C~2NKX      
2014 10  29.25791  00 55 58.613  +04 02 11.60  23.7r 13UW16    568  C~2NKX      
2014 11  19.20738  00 54 45.397  +03 55 07.49  23.1r 13UW16    568  C~2NKX      
2014 11  25.22391  00 54 28.660  +03 53 35.45  23.7r 13UW16    568  C~2NKX      
2014 12  17.32324  00 53 49.178  +03 50 24.11  23.7r 13UW16    568  C~2NKX      
2015 01  17.26407  00 54 01.211  +03 53 06.71  23.9r 13UW16    568  C~2NKX      
2017 01  31.21678  01 03 09.260  +04 53 07.77  24.0w 13UW16    568  C~2NKX      
2017 01  31.22433  01 03 09.275  +04 53 07.94  23.7w 13UW16    568  C~2NKX      
2017 07  24.59111  01 14 13.622  +06 00 09.23  23.8w 13UW16    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    -0.00       0.00     0.02
  2   0.0001     -1.09    -0.08      -0.08     0.01
  3   0.0246   -251.60    -0.10     -17.45     0.06
  4   0.0764  -1064.01     0.06     -47.84     0.01
  5   0.0792  -1116.64    -0.02     -49.16     0.00
  6   0.0793  -1118.98    -0.05     -49.22    -0.03
  7   0.0901  -1332.85     0.10     -54.31    -0.30
  8   0.0902  -1335.46    -0.08     -54.11    -0.06
  9   0.1749  -3317.04     0.06     -70.79    -0.12
 10   0.1749  -3317.53    -0.07     -70.60     0.07
 11   0.1776  -3386.37    -0.05     -70.55    -0.03
 12   0.1778  -3390.66     0.15     -70.54    -0.05
 13   0.1862  -3600.89    -0.07     -69.81    -0.06
 14   0.1862  -3601.02     0.12     -69.62     0.13
 15   0.2404  -4911.61     0.16     -55.57    -0.11
 16   0.2456  -5031.04    -0.16     -53.04     0.16
 17   0.2458  -5033.53     0.02     -53.21    -0.08
 18   0.2459  -5036.18     0.03     -53.06    -0.00
 19   0.2485  -5093.30     0.14     -51.84     0.06
 20   0.2488  -5100.74     0.06     -51.70    -0.01
 21   0.2511  -5151.53 (   0.53)    -50.85 (  -0.19)
 22   0.2512  -5153.55    -0.12     -50.66    -0.04
 23   0.2512  -5154.59     0.15     -50.56     0.03
 24   0.2513  -5156.22    -0.11     -50.49     0.05
 25   0.2597  -5336.71    -0.21     -46.51    -0.19
 26   0.2597  -5338.09    -0.06     -46.35    -0.08
 27   0.2625  -5396.76     0.00     -44.98    -0.20
 28   0.2626  -5397.13    -0.07     -44.70     0.06
 29   0.2654  -5455.58    -0.03     -43.26    -0.05
 30   0.3250  -6465.30    -0.08      -2.30     0.09
 31   0.3388  -6626.17     0.14       9.17     0.12
 32   0.3389  -6627.63     0.10       9.26     0.08
 33   0.3417  -6656.70     0.04      11.51    -0.07
 34   0.9009   4207.68    -0.00     143.54     0.01
 35   0.9037   4232.47     0.01     141.37     0.01
 36   0.9721   4429.16     0.13      86.95     0.28
 37   0.9830   4385.75    -0.01      78.20    -0.02
 38   1.0544   3628.72    -0.00      29.72     0.01
 39   1.0567   3591.26     0.07      28.53     0.21
 40   1.0704   3358.52    -0.05      21.16     0.09
 41   1.2232   -187.95     0.08       4.28    -0.04
 42   1.2233   -191.64    -0.03       4.21    -0.18
 43   1.2235   -195.28    -0.09       4.63     0.17
 44   1.2286   -317.43     0.21       6.10    -0.04
 45   1.2289   -324.38    -0.03       6.27    -0.01
 46   1.2292   -331.08    -0.09       6.46     0.04
 47   1.2341   -446.32     0.07       8.14    -0.00
 48   1.2342   -450.22    -0.05       8.26     0.03
 49   1.2344   -454.55    -0.05       8.35     0.03
 50   1.2396   -574.80    -0.09      10.31    -0.03
 51   1.2969  -1749.22    -0.03      42.29    -0.01
 52   1.3134  -2015.82    -0.06      54.20    -0.09
 53   1.3739  -2634.81     0.02     106.16     0.29
 54   1.4586  -2405.83     0.03     186.49    -0.00
 55   3.4982   6547.68     0.02     351.63    -0.07
 56   3.4982   6547.96    -0.04     351.70    -0.02
 57   3.9756  17290.01     0.00     281.06    -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.

13UW16    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.674    44.681    44.667
ecceobj         0.072     0.072     0.071
incobj          1.972     1.972     1.972
qmin           40.056    40.057    40.073
qmax           49.001    49.052    48.946
amean          44.415    44.421    44.408
amin           44.067    44.069    44.045
amax           44.799    44.790    44.754
emean           0.079     0.080     0.079
emin            0.064     0.064     0.063
emax            0.095     0.095     0.094
imean           0.756     0.756     0.756
imin            0.063     0.059     0.063
imax            1.219     1.220     1.219
excite_mean     0.081     0.081     0.080
fracstop        1.000     1.000     1.000
cjmean          3.099     3.099     3.099

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       167.6     167.8     167.8
kozaiamp        180.0     180.0     180.0