Orbit Fit and Astrometric record for 13UD17

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: 13UD17    
# Created Fri Dec 15 02:37:54 2017
# Orbit generated from Bernstein formalism
# Fitting   15 observations of   15
# Arc:   1.37y
# First observation: 2013/08/02
#  Last observation: 2014/12/17
Preliminary a, adot, b, bdot, g, gdot:
  -0.000261   0.033773   0.000063   0.016630   0.029830   0.000000
# Chi-squared of fit:     6.64 DOF:   24 RMS:  0.12
# Min/Max residuals:    -0.31    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.823326E-05  3.394994E-02  8.412791E-06  1.688346E-02  2.991785E-02  3.829732E-03
# Covariance matrix:
  4.6431E-13  1.1524E-13 -6.8690E-14  4.4033E-13  4.7527E-13  2.0359E-11
  1.1524E-13  1.6242E-12 -1.8334E-13  1.1625E-12  8.8818E-13  5.3624E-11
 -6.8690E-14 -1.8334E-13  2.3561E-13 -5.0912E-13 -1.7141E-13 -1.1085E-11
  4.4033E-13  1.1625E-12 -5.0912E-13  2.2417E-12  1.0914E-12  7.0174E-11
  4.7527E-13  8.8818E-13 -1.7141E-13  1.0914E-12  9.6529E-13  5.0387E-11
  2.0359E-11  5.3624E-11 -1.1085E-11  7.0174E-11  5.0387E-11  3.2359E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.317057   15.752597    0.926427   -0.009603   -0.418897  2456507.009328
# Heliocentric elements and errors
Epoch:              2456500.5000  =  2013/07/27
Mean Anomaly:            5.98258 +/-     0.110
Argument of Peri:      342.00299 +/-     0.285
Long of Asc Node:       16.81273 +/-     0.000
Inclination:            26.36706 +/-     0.001
Eccentricity:         0.39766703 +/-    0.0006
Semi-Major Axis:     55.65977257 +/-    0.0348
Time of Perihelion: 2453979.9444 +/-      46.3
Perihelion:          33.52571620 +/-    0.0404
Aphelion:            77.79382895 +/-    0.0596
Period (y)              415.2602 +/-      0.39
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           32.81559597 +/-    0.0011
Ecliptic Y            8.29713955 +/-    0.0003
Ecliptic Z           -0.76794408 +/-    0.0000
Ecliptic XDOT        -0.00047829 +/-    0.0000
Ecliptic YDOT         0.00309409 +/-    0.0000
Ecliptic ZDOT         0.00153672 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.85698749 +/-    0.0010
Geocenter to KBO     33.42486655 +/-    0.0011
# Hcoef:  9.21

The following table shows the complete astrometric record for 13UD17. 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 (13UD17) followed by the observatory code and reference code for the source of the astrometry.

2013 08  02.50855  01 00 04.549  +04 59 01.53  24.3r 13UD17    568  C~2NKY      
2013 08  02.55128  01 00 04.487  +04 59 01.43  24.8r 13UD17    568  C~2NKY      
2013 09  04.40817  00 58 17.954  +04 52 36.94  24.7r 13UD17    568  C~2NKY      
2013 09  04.45095  00 58 17.745  +04 52 35.98  24.2r 13UD17    568  C~2NKY      
2013 10  31.23096  00 53 11.133  +04 30 22.01  24.6r 13UD17    568  C~2NKY      
2013 10  31.27407  00 53 10.902  +04 30 21.19  23.9r 13UD17    568  C~2NKY      
2013 10  31.31685  00 53 10.679  +04 30 20.32  24.4r 13UD17    568  C~2NKY      
2013 11  01.25731  00 53 05.875  +04 30 00.95  24.1r 13UD17    568  C~2NKY      
2013 11  29.22005  00 51 09.651  +04 23 19.26  24.3r 13UD17    568  C~2NKY      
2013 12  04.24712  00 50 55.743  +04 22 52.47  24.2r 13UD17    568  C~2NKY      
2013 12  04.29457  00 50 55.627  +04 22 52.19  24.8r 13UD17    568  C~2NKY      
2013 12  06.21068  00 50 51.005  +04 22 45.95  24.5r 13UD17    568  C~2NKY      
2014 06  27.59003  01 05 34.628  +06 30 00.45  24.9r 13UD17    568  C~2NKY      
2014 06  28.59510  01 05 36.840  +06 30 23.69  24.5r 13UD17    568  C~2NKY      
2014 12  17.31110  00 56 13.358  +06 01 01.69  24.1r 13UD17    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    -0.06       0.00     0.11
  2   0.0001     -0.89     0.16       0.26     0.03
  3   0.0901  -1618.43     0.12     257.67     0.05
  4   0.0902  -1621.68    -0.07     257.98    -0.01
  5   0.2456  -6367.27    -0.03     795.73    -0.06
  6   0.2458  -6370.77    -0.07     796.31     0.05
  7   0.2459  -6374.19    -0.05     796.80     0.06
  8   0.2485  -6448.00     0.09     806.71     0.15
  9   0.3250  -8208.44     0.05    1109.17    -0.04
 10   0.3388  -8410.93    -0.00    1165.09     0.08
 11   0.3389  -8412.64     0.07    1165.50    -0.06
 12   0.3442  -8478.90    -0.19    1186.55    -0.28
 13   0.9010   6644.93    -0.02    3155.61    -0.31
 14   0.9037   6684.33    -0.10    3164.51     0.00
 15   1.3739  -1753.80     0.10    4763.34     0.24

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.

13UD17    quality flag:3

Type:         5:2EEE    5:2EEE    5:2EEE

axisobj        56.082    56.237    55.931
ecceobj         0.403     0.405     0.400
incobj         26.319    26.320    26.319
qmin           32.841    32.740    32.893
qmax           79.364    79.580    79.382
amean          55.461    55.462    55.462
amin           54.709    54.630    54.738
amax           56.368    56.493    56.365
emean           0.358     0.389     0.349
emin            0.300     0.367     0.254
emax            0.408     0.412     0.408
imean          28.065    26.703    28.278
imin           26.033    25.938    26.040
imax           30.137    27.492    31.480
excite_mean     0.593     0.595     0.591
fracstop        1.000     1.000     1.000
cjmean          2.776     2.775     2.778

libcent 0       181.7     180.1     181.4
libamp  0       140.3     149.0     150.8
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       102.3     158.0      85.2
kozaiamp        180.0     180.0     180.0