Orbit Fit and Astrometric record for 13UT15

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: 13UT15    
# Created Sat Oct 21 01:38:18 2017
# Orbit generated from Bernstein formalism
# Fitting   38 observations of   38
# Arc:   3.50y
# First observation: 2013/08/02
#  Last observation: 2017/01/31
Preliminary a, adot, b, bdot, g, gdot:
  -0.000028   0.014935   0.000008  -0.002794   0.016558   0.000000
# Chi-squared of fit:    10.38 DOF:   70 RMS:  0.09
# Min/Max residuals:    -0.20    0.29
# Exact a, adot, b, bdot, g, gdot:
  1.438019E-05  1.475754E-02 -2.091546E-06 -2.747127E-03  1.641962E-02 -8.292715E-03
# Covariance matrix:
  1.0972E-13 -3.1645E-14 -9.7500E-16  3.5998E-15  5.6474E-14 -4.5965E-13
 -3.1645E-14  2.0709E-13  1.8984E-14 -5.7425E-14  1.0511E-13  6.8436E-12
 -9.7500E-16  1.8984E-14  7.0985E-14 -4.6161E-14  1.0307E-14  8.5941E-13
  3.5998E-15 -5.7425E-14 -4.6161E-14  7.1303E-14 -3.0353E-14 -2.6120E-12
  5.6474E-14  1.0511E-13  1.0307E-14 -3.0353E-14  1.3538E-13  3.5785E-12
 -4.5965E-13  6.8436E-12  8.5941E-13 -2.6120E-12  3.5785E-12  3.1187E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.516118   15.544151    0.924896   -0.003777   -0.422358  2456507.009328
# Heliocentric elements and errors
Epoch:              2456500.5000  =  2013/07/27
Mean Anomaly:          353.41385 +/-     0.056
Argument of Peri:      252.03437 +/-     0.044
Long of Asc Node:      191.95539 +/-     0.000
Inclination:            10.64664 +/-     0.001
Eccentricity:         0.78465261 +/-    0.0014
Semi-Major Axis:    203.93368452 +/-    1.1486
Time of Perihelion: 2475961.3091 +/-       7.0
Perihelion:          43.91658751 +/-    0.3760
Aphelion:           363.95078153 +/-    2.0693
Period (y)             2912.3372 +/-     24.60
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           59.32729513 +/-    0.0013
Ecliptic Y           15.54558117 +/-    0.0004
Ecliptic Z           -0.54868566 +/-    0.0000
Ecliptic XDOT        -0.00200175 +/-    0.0000
Ecliptic YDOT         0.00199824 +/-    0.0000
Ecliptic ZDOT        -0.00044545 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   61.33265116 +/-    0.0013
Geocenter to KBO     60.90274836 +/-    0.0014
# Hcoef:  6.36

The following table shows the complete astrometric record for 13UT15. 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 (13UT15) followed by the observatory code and reference code for the source of the astrometry.

2013 08  02.50855  00 58 03.912  +05 38 34.39  24.1r 13UT15    568  C~2GtD      
2013 08  02.55128  00 58 03.869  +05 38 34.17  24.1r 13UT15    568  C~2GtD      
2013 08  11.50755  00 57 53.274  +05 37 08.74  23.7r 13UT15    568  C~2GtD      
2013 08  30.42396  00 57 17.941  +05 32 48.57  23.9r 13UT15    568  C~2GtD      
2013 08  31.42817  00 57 15.630  +05 32 32.12  24.4r 13UT15    568  C~2GtD      
2013 08  31.47118  00 57 15.522  +05 32 31.46  24.2r 13UT15    568  C~2GtD      
2013 09  04.40817  00 57 06.103  +05 31 24.62  24.1r 13UT15    568  C~2GtD      
2013 09  04.45095  00 57 05.990  +05 31 23.85  23.8r 13UT15    568  C~2GtD      
2013 10  06.38359  00 55 34.642  +05 20 53.81  23.8r 13UT15    568  C~2GtD      
2013 10  06.44798  00 55 34.429  +05 20 52.39  24.1r 13UT15    568  C~2GtD      
2013 10  06.45762  00 55 34.413  +05 20 52.15  23.7r 13UT15    568  C~2GtD      
2013 10  06.46264  00 55 34.386  +05 20 52.04  23.9r 13UT15    568  C~2GtD      
2013 10  09.51275  00 55 25.000  +05 19 48.25  23.9r 13UT15    568  C~2GtD      
2013 10  31.23096  00 54 20.278  +05 12 29.10  24.2r 13UT15    568  C~2GtD      
2013 10  31.27407  00 54 20.136  +05 12 28.23  24.0r 13UT15    568  C~2GtD      
2013 10  31.31685  00 54 20.032  +05 12 27.56  24.2r 13UT15    568  C~2GtD      
2013 11  01.25731  00 54 17.416  +05 12 09.70  23.9r 13UT15    568  C~2GtD      
2013 11  01.37789  00 54 17.062  +05 12 07.52  23.7r 13UT15    568  C~2GtD      
2013 12  04.25882  00 53 06.346  +05 04 01.99  24.2r 13UT15    568  C~2GtD      
2013 12  04.31091  00 53 06.291  +05 04 01.59  24.1r 13UT15    568  C~2GtD      
2013 12  06.21580  00 53 03.756  +05 03 43.51  24.3r 13UT15    568  C~2GtD      
2014 06  27.57836  01 01 22.268  +05 50 15.47  24.4r 13UT15    568  C~2GtD      
2014 06  28.58343  01 01 23.488  +05 50 20.54  24.1r 13UT15    568  C~2GtD      
2014 07  23.55581  01 01 34.538  +05 50 28.93  24.2r 13UT15    568  C~2GtD      
2014 07  27.53499  01 01 32.877  +05 50 09.02  24.4r 13UT15    568  C~2GtD      
2014 08  22.54836  01 01 00.385  +05 45 46.87  24.5r 13UT15    568  C~2GtD      
2014 08  28.40993  01 00 48.407  +05 44 19.31  24.0r 13UT15    568  C~2GtD      
2014 08  28.44652  01 00 48.339  +05 44 18.79  24.3r 13UT15    568  C~2GtD      
2014 10  23.37180  00 58 08.440  +05 25 58.92  24.1r 13UT15    568  C~2GtD      
2014 10  27.41049  00 57 56.443  +05 24 38.12  23.9r 13UT15    568  C~2GtD      
2014 11  19.20228  00 56 57.026  +05 17 57.61  24.1r 13UT15    568  C~2GtD      
2014 11  19.26959  00 56 56.867  +05 17 56.58  23.9r 13UT15    568  C~2GtD      
2014 11  25.21887  00 56 44.607  +05 16 33.09  23.9r 13UT15    568  C~2GtD      
2015 01  17.27935  00 56 23.593  +05 13 31.93  24.3r 13UT15    568  C~2GtD      
2015 08  20.53131  01 04 33.202  +05 57 17.21  23.9r 13UT15    568  C~2GtD      
2015 12  07.36957  00 59 51.187  +05 25 08.41  24.4w 13UT15    568  C~2GtD      
2017 01  31.21678  01 03 37.834  +05 37 15.54  24.1w 13UT15    568  C~2GtD      
2017 01  31.22433  01 03 37.844  +05 37 15.65        13UT15    568  C~2GtD      

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    -0.03       0.00    -0.11
  2   0.0001     -0.68     0.00       0.04     0.00
  3   0.0246   -179.54    -0.15     -17.88     0.03
  4   0.0764   -766.54    -0.03     -54.74    -0.03
  5   0.0792   -804.72    -0.04     -56.62    -0.02
  6   0.0793   -806.46    -0.11     -56.61     0.06
  7   0.0901   -961.98    -0.06     -64.08    -0.03
  8   0.0902   -963.84    -0.14     -64.14    -0.03
  9   0.1776  -2465.47    -0.02    -119.22     0.04
 10   0.1778  -2468.95    -0.20    -119.30     0.04
 11   0.1778  -2469.27    -0.02    -119.43    -0.07
 12   0.1778  -2469.68    -0.17    -119.37    -0.01
 13   0.1862  -2623.64     0.22    -124.10     0.02
 14   0.2456  -3685.22     0.14    -155.70    -0.06
 15   0.2458  -3687.52    -0.15    -155.69     0.00
 16   0.2459  -3689.21     0.15    -155.70     0.03
 17   0.2485  -3732.17     0.02    -157.07    -0.07
 18   0.2488  -3737.89    -0.15    -157.04     0.09
 19   0.3388  -4900.45    -0.03    -196.22     0.03
 20   0.3390  -4901.37     0.29    -196.27     0.01
 21   0.3442  -4943.31     0.18    -198.28     0.05
 22   0.9009   3002.66     0.08    -490.91     0.09
 23   0.9037   3021.42     0.07    -493.22    -0.01
 24   0.9721   3176.94     0.16    -548.75    -0.07
 25   0.9830   3146.40     0.13    -557.63    -0.12
 26   1.0542   2597.93     0.04    -613.59     0.06
 27   1.0702   2399.22    -0.10    -625.80    -0.02
 28   1.0703   2398.08     0.10    -625.89    -0.05
 29   1.2234   -228.53     0.14    -723.25     0.01
 30   1.2345   -424.98     0.04    -728.82    -0.03
 31   1.2969  -1398.18     0.01    -756.48     0.08
 32   1.2971  -1400.76    -0.11    -756.52     0.10
 33   1.3134  -1601.93    -0.03    -762.95    -0.04
 34   1.4586  -1961.43    -0.07    -809.05     0.11
 35   2.0480   5797.10     0.02   -1193.08     0.05
 36   2.3460   1168.28    -0.11   -1360.19    -0.09
 37   3.4982   4573.12    -0.01   -1987.27    -0.04
 38   3.4982   4573.30    -0.07   -1987.22     0.01

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.

13UT15    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj       207.647   211.160   204.272
ecceobj         0.787     0.792     0.783
incobj         10.611    10.610    10.611
qmin           41.888    41.807    42.061
qmax          378.711   382.953   369.164
amean         199.907   201.895   196.084
amin          193.334   194.477   189.245
amax          211.337   213.386   206.589
emean           0.780     0.783     0.775
emin            0.770     0.772     0.764
emax            0.792     0.795     0.787
imean          10.525    10.521    10.526
imin           10.384    10.368    10.384
imax           10.788    10.816    10.816
excite_mean     0.801     0.804     0.796
fracstop        1.000     1.000     1.000
cjmean          3.321     3.318     3.324

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       279.9     283.0     281.0
kozaiamp         28.6      30.2      29.9