Orbit Fit and Astrometric record for 13UE17

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: 13UE17    
# Created Fri Dec 15 02:37:54 2017
# Orbit generated from Bernstein formalism
# Fitting   26 observations of   26
# Arc:   2.05y
# First observation: 2013/08/02
#  Last observation: 2015/08/20
Preliminary a, adot, b, bdot, g, gdot:
  -0.000243   0.023879  -0.000001  -0.000021   0.024120   0.000000
# Chi-squared of fit:     9.70 DOF:   46 RMS:  0.11
# Min/Max residuals:    -0.20    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.551148E-05  2.372652E-02  4.984023E-07 -2.120365E-05  2.412922E-02  1.400287E-03
# Covariance matrix:
  2.7368E-13 -4.3454E-14  8.9333E-16 -8.2341E-16  1.9146E-13  3.5847E-12
 -4.3454E-14  3.6715E-13  7.0018E-16 -8.5389E-16  1.5525E-13  8.3296E-12
  8.9333E-16  7.0018E-16  1.1837E-13 -1.1044E-13  1.2616E-15  3.5587E-14
 -8.2341E-16 -8.5389E-16 -1.1044E-13  1.9555E-13 -1.2690E-15 -4.2712E-14
  1.9146E-13  1.5525E-13  1.2616E-15 -1.2690E-15  2.7302E-13  7.8736E-12
  3.5847E-12  8.3296E-12  3.5587E-14 -4.2712E-14  7.8736E-12  4.0518E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.720841   15.762786    0.926501   -0.005242   -0.418810  2456507.009328
# Heliocentric elements and errors
Epoch:              2456500.5000  =  2013/07/27
Mean Anomaly:           47.43526 +/-     0.569
Argument of Peri:      213.26955 +/-     0.668
Long of Asc Node:      109.78214 +/-     0.085
Inclination:             0.71640 +/-     0.000
Eccentricity:         0.04548055 +/-    0.0007
Semi-Major Axis:     43.14929656 +/-    0.0044
Time of Perihelion: 2442859.1374 +/-     163.6
Perihelion:          41.18684267 +/-    0.0304
Aphelion:            45.11175045 +/-    0.0304
Period (y)              283.4450 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           40.53643346 +/-    0.0009
Ecliptic Y           10.48271013 +/-    0.0002
Ecliptic Z           -0.52132465 +/-    0.0000
Ecliptic XDOT        -0.00058470 +/-    0.0000
Ecliptic YDOT         0.00263325 +/-    0.0000
Ecliptic ZDOT        -0.00000426 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.87315881 +/-    0.0008
Geocenter to KBO     41.44353597 +/-    0.0009
# Hcoef:  8.39

The following table shows the complete astrometric record for 13UE17. 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 (13UE17) followed by the observatory code and reference code for the source of the astrometry.

2013 08  02.50855  00 59 11.571  +05 32 17.05  24.9r 13UE17    568  C~2NKY      
2013 08  02.55128  00 59 11.507  +05 32 16.59  24.3r 13UE17    568  C~2NKY      
2013 09  04.40817  00 57 47.534  +05 23 04.86  24.6r 13UE17    568  C~2NKY      
2013 10  06.38359  00 55 33.408  +05 08 56.37  24.3r 13UE17    568  C~2NKY      
2013 10  06.44798  00 55 33.125  +05 08 54.55  24.2r 13UE17    568  C~2NKY      
2013 10  06.45762  00 55 33.078  +05 08 54.15  24.5r 13UE17    568  C~2NKY      
2013 10  06.46264  00 55 33.062  +05 08 53.91  24.1r 13UE17    568  C~2NKY      
2013 10  31.23096  00 53 44.458  +04 57 39.88  24.7r 13UE17    568  C~2NKY      
2013 10  31.27407  00 53 44.278  +04 57 38.52  24.2r 13UE17    568  C~2NKY      
2013 10  31.31685  00 53 44.097  +04 57 37.48  24.3r 13UE17    568  C~2NKY      
2013 11  01.25731  00 53 40.303  +04 57 14.02  24.1r 13UE17    568  C~2NKY      
2013 11  01.37789  00 53 39.804  +04 57 11.02  24.3r 13UE17    568  C~2NKY      
2013 11  05.38291  00 53 23.983  +04 55 34.12  24.6r 13UE17    568  C~2NKY      
2013 11  29.22005  00 52 08.221  +04 47 56.78  24.6r 13UE17    568  C~2NKY      
2013 12  04.24712  00 51 57.227  +04 46 52.57  24.3r 13UE17    568  C~2NKY      
2013 12  04.29457  00 51 57.151  +04 46 52.22  24.0r 13UE17    568  C~2NKY      
2013 12  06.21068  00 51 53.499  +04 46 31.20  25.1r 13UE17    568  C~2NKY      
2014 06  27.57836  01 04 02.603  +06 02 57.23  24.6r 13UE17    568  C~2NKY      
2014 06  28.58343  01 04 04.449  +06 03 07.57  24.8r 13UE17    568  C~2NKY      
2014 07  24.54140  01 04 21.866  +06 04 25.92  24.9r 13UE17    568  C~2NKY      
2014 07  27.57207  01 04 20.106  +06 04 11.49  24.4r 13UE17    568  C~2NKY      
2014 11  19.20228  00 57 40.855  +05 22 23.93  24.1r 13UE17    568  C~2NKY      
2014 11  19.26959  00 57 40.623  +05 22 22.70  24.4r 13UE17    568  C~2NKY      
2014 11  25.21887  00 57 22.807  +05 20 36.31  24.4r 13UE17    568  C~2NKY      
2015 01  17.27935  00 56 52.493  +05 18 24.86  25.1r 13UE17    568  C~2NKY      
2015 08  20.52313  01 08 44.332  +06 30 49.43  24.6r 13UE17    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     0.01       0.00    -0.11
  2   0.0001     -1.06    -0.07      -0.06    -0.14
  3   0.0901  -1370.72     0.05     -26.69    -0.08
  4   0.1776  -3546.69    -0.14     -37.13     0.11
  5   0.1778  -3551.29     0.05     -37.18     0.03
  6   0.1778  -3552.09    -0.04     -37.28    -0.07
  7   0.1778  -3552.41     0.02     -37.41    -0.20
  8   0.2456  -5310.36    -0.05     -32.25     0.25
  9   0.2458  -5313.37    -0.17     -32.47    -0.01
 10   0.2459  -5316.27    -0.20     -32.38     0.04
 11   0.2485  -5377.67     0.07     -32.09    -0.05
 12   0.2488  -5385.71     0.03     -31.98    -0.05
 13   0.2598  -5641.41     0.19     -29.91     0.08
 14   0.3250  -6863.63     0.17     -13.45     0.06
 15   0.3388  -7040.21    -0.14      -9.02     0.02
 16   0.3389  -7041.39     0.24      -8.90     0.07
 17   0.3442  -7099.93    -0.05      -7.14     0.10
 18   0.9009   4717.63    -0.04      33.16     0.04
 19   0.9037   4747.04     0.12      32.17     0.08
 20   0.9748   5017.20     0.04       5.17     0.12
 21   0.9831   4987.40     0.00       1.88    -0.11
 22   1.2969  -1478.53     0.08     -26.04    -0.09
 23   1.2971  -1482.21    -0.06     -25.84     0.03
 24   1.3134  -1768.74     0.11     -21.52    -0.20
 25   1.4586  -2237.22    -0.17      31.68     0.11
 26   2.0480   9243.78    -0.03     -24.25    -0.02

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.

13UE17    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.383    43.398    43.368
ecceobj         0.051     0.052     0.049
incobj          0.716     0.716     0.716
qmin           40.213    40.166    40.242
qmax           46.237    46.283    46.122
amean          43.128    43.127    43.106
amin           42.796    42.788    42.766
amax           43.468    43.487    43.452
emean           0.046     0.048     0.045
emin            0.026     0.025     0.023
emax            0.064     0.065     0.062
imean           1.699     1.709     1.714
imin            0.557     0.563     0.566
imax            2.362     2.398     2.398
excite_mean     0.055     0.056     0.054
fracstop        1.000     1.000     1.000
cjmean          3.087     3.087     3.087

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       181.0     180.6     179.1
kozaiamp        180.0     179.9     179.9