Orbit Fit and Astrometric record for 13UA17

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: 13UA17    
# Created Mon Dec 18 02:37:58 2017
# Orbit generated from Bernstein formalism
# Fitting   32 observations of   32
# Arc:   2.32y
# First observation: 2013/08/11
#  Last observation: 2015/12/07
Preliminary a, adot, b, bdot, g, gdot:
  -0.000225   0.033091   0.000001   0.001101   0.029298   0.000000
# WARNING -- MRQMIN stopped after  17 iterations
# Chi-squared of fit:     9.51 DOF:   58 RMS:  0.10
# Min/Max residuals:    -0.19    0.19
# Exact a, adot, b, bdot, g, gdot:
  1.858249E-05  3.304776E-02  7.598081E-07  1.107837E-03  2.937808E-02  3.714301E-03
# Covariance matrix:
  1.5600E-13 -1.7484E-14 -2.8364E-16  2.5737E-15  1.1250E-13  1.3889E-12
 -1.7484E-14  3.9938E-13 -2.9046E-15  1.5848E-14  2.1553E-13  8.0685E-12
 -2.8364E-16 -2.9046E-15  9.7781E-14 -7.9009E-14 -1.7216E-15 -8.6667E-14
  2.5737E-15  1.5848E-14 -7.9009E-14  1.2025E-13  1.0888E-14  4.6419E-13
  1.1250E-13  2.1553E-13 -1.7216E-15  1.0888E-14  2.6098E-13  5.6579E-12
  1.3889E-12  8.0685E-12 -8.6667E-14  4.6419E-13  5.6579E-12  2.3567E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.556523   15.639418    0.850821   -0.005344   -0.553817  2456516.008328
# Heliocentric elements and errors
Epoch:              2456510.5000  =  2013/08/06
Mean Anomaly:           29.31099 +/-     0.098
Argument of Peri:      304.56672 +/-     0.147
Long of Asc Node:       30.28435 +/-     0.004
Inclination:             1.97910 +/-     0.001
Eccentricity:         0.15056392 +/-    0.0003
Semi-Major Axis:     39.52724359 +/-    0.0049
Time of Perihelion: 2449120.0445 +/-      24.7
Perihelion:          33.57586683 +/-    0.0142
Aphelion:            45.47862035 +/-    0.0147
Period (y)              248.5152 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           33.53965131 +/-    0.0006
Ecliptic Y            8.50897352 +/-    0.0002
Ecliptic Z           -0.33055741 +/-    0.0000
Ecliptic XDOT        -0.00050220 +/-    0.0000
Ecliptic YDOT         0.00305850 +/-    0.0000
Ecliptic ZDOT         0.00010002 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.60375859 +/-    0.0006
Geocenter to KBO     34.03898651 +/-    0.0006
# Hcoef:  8.93

The following table shows the complete astrometric record for 13UA17. 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 (13UA17) followed by the observatory code and reference code for the source of the astrometry.

2013 08  11.50755  00 58 28.867  +05 38 32.18  24.7r 13UA17    568  C~2NKX      
2013 08  30.42396  00 57 28.629  +05 32 14.87  24.5r 13UA17    568  C~2NKX      
2013 08  31.42817  00 57 24.655  +05 31 50.16  24.1r 13UA17    568  C~2NKX      
2013 08  31.47118  00 57 24.473  +05 31 48.91  23.9r 13UA17    568  C~2NKX      
2013 09  04.40817  00 57 08.203  +05 30 07.72  23.9r 13UA17    568  C~2NKX      
2013 09  04.45095  00 57 08.010  +05 30 06.77  24.6r 13UA17    568  C~2NKX      
2013 10  06.38359  00 54 29.104  +05 13 45.56  23.9r 13UA17    568  C~2NKX      
2013 10  06.44798  00 54 28.774  +05 13 43.43  23.9r 13UA17    568  C~2NKX      
2013 10  06.45762  00 54 28.710  +05 13 43.23  24.0r 13UA17    568  C~2NKX      
2013 10  06.46264  00 54 28.694  +05 13 42.93  24.1r 13UA17    568  C~2NKX      
2013 10  09.51275  00 54 12.292  +05 12 02.36  24.1r 13UA17    568  C~2NKX      
2013 10  31.23096  00 52 20.147  +05 00 39.32  24.0r 13UA17    568  C~2NKX      
2013 10  31.27407  00 52 19.934  +05 00 38.31  24.0r 13UA17    568  C~2NKX      
2013 10  31.31685  00 52 19.727  +05 00 36.94  24.2r 13UA17    568  C~2NKX      
2013 11  01.25731  00 52 15.236  +05 00 09.67  23.9r 13UA17    568  C~2NKX      
2013 11  01.37789  00 52 14.661  +05 00 06.30  24.1r 13UA17    568  C~2NKX      
2013 12  06.21068  00 50 11.347  +04 47 59.82  24.6r 13UA17    568  C~2NKX      
2014 06  27.59003  01 05 19.658  +06 25 13.68  24.3r 13UA17    568  C~2NKX      
2014 06  28.59510  01 05 22.024  +06 25 28.04  23.8r 13UA17    568  C~2NKX      
2014 07  27.57207  01 05 45.680  +06 27 46.29  23.9r 13UA17    568  C~2NKX      
2014 08  22.57202  01 04 54.413  +06 22 27.13  24.5r 13UA17    568  C~2NKX      
2014 08  22.59325  01 04 54.350  +06 22 26.83  24.0r 13UA17    568  C~2NKX      
2014 08  26.44705  01 04 41.551  +06 21 07.62  25.4u 13UA17    568  C~2NKX      
2014 08  28.43479  01 04 34.474  +06 20 24.35  24.0r 13UA17    568  C~2NKX      
2014 10  23.37959  01 00 00.079  +05 52 32.71  24.4r 13UA17    568  C~2NKX      
2014 10  27.39496  00 59 39.483  +05 50 28.64  24.6r 13UA17    568  C~2NKX      
2014 11  19.20228  00 57 57.236  +05 40 19.00  24.1r 13UA17    568  C~2NKX      
2014 11  19.26959  00 57 56.962  +05 40 17.41  24.4r 13UA17    568  C~2NKX      
2014 11  25.21887  00 57 36.092  +05 38 15.18  24.4r 13UA17    568  C~2NKX      
2015 01  17.28768  00 57 05.898  +05 36 27.99  24.5r 13UA17    568  C~2NKX      
2015 08  20.50656  01 11 55.608  +07 09 34.38  24.4r 13UA17    568  C~2NKX      
2015 12  07.39423  01 03 55.892  +06 21 53.26  24.5w 13UA17    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    -0.16       0.00    -0.03
  2   0.0518   -975.23    -0.07      -1.89     0.02
  3   0.0545  -1039.50     0.07      -1.83     0.05
  4   0.0547  -1042.49    -0.08      -1.93    -0.08
  5   0.0654  -1305.65     0.08      -1.69    -0.02
  6   0.0656  -1308.68     0.06      -1.45     0.19
  7   0.1530  -3877.08    -0.12       9.26     0.09
  8   0.1532  -3882.46     0.19       9.20    -0.05
  9   0.1532  -3883.41     0.08       9.39     0.13
 10   0.1532  -3883.75     0.18       9.20    -0.06
 11   0.1615  -4148.69    -0.17      11.14    -0.11
 12   0.2210  -5959.07    -0.05      29.52    -0.06
 13   0.2211  -5962.40     0.01      29.82     0.18
 14   0.2212  -5965.79    -0.00      29.75     0.04
 15   0.2238  -6038.28    -0.03      30.60    -0.06
 16   0.2241  -6047.52     0.14      30.82    -0.04
 17   0.3195  -8030.30    -0.18      75.49    -0.02
 18   0.8763   6735.96     0.17     237.43    -0.08
 19   0.8791   6774.08    -0.03     237.23    -0.05
 20   0.9584   7153.18    -0.09     230.34    -0.06
 21   1.0296   6324.14    -0.14     227.30    -0.02
 22   1.0297   6323.16    -0.01     227.38     0.05
 23   1.0402   6116.38    -0.06     227.12    -0.19
 24   1.0457   6002.25    -0.00     227.47     0.07
 25   1.1988   1579.87     0.11     252.32     0.03
 26   1.2098   1248.45     0.11     255.91    -0.00
 27   1.2723   -394.63     0.17     280.37     0.06
 28   1.2724   -399.01    -0.08     280.48     0.05
 29   1.2887   -733.59    -0.01     287.68    -0.15
 30   1.4340  -1190.82    -0.03     362.47     0.03
 31   2.0233  13217.96     0.07     454.71     0.03
 32   2.3214   5504.43    -0.12     529.72     0.07

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.

13UA17    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.746    39.765    39.728
ecceobj         0.156     0.157     0.155
incobj          1.975     1.975     1.975
qmin           32.886    32.851    32.927
qmax           46.604    46.647    46.633
amean          39.458    39.458    39.458
amin           39.000    38.990    39.006
amax           39.993    39.963    39.975
emean           0.149     0.149     0.148
emin            0.132     0.130     0.131
emax            0.168     0.168     0.167
imean           1.849     1.839     1.849
imin            1.129     1.102     1.142
imax            2.458     2.488     2.457
excite_mean     0.152     0.153     0.152
fracstop        1.000     1.000     1.000
cjmean          3.025     3.025     3.026

libcent 0       179.9     179.7     179.0
libamp  0        96.1      97.9      95.3
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       178.9     182.6     176.8
kozaiamp        179.9     179.9     180.0