Orbit Fit and Astrometric record for 13UG17

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: 13UG17    
# Created Fri Dec 15 02:37:54 2017
# Orbit generated from Bernstein formalism
# Fitting   45 observations of   45
# Arc:   4.08y
# First observation: 2013/08/02
#  Last observation: 2017/08/30
Preliminary a, adot, b, bdot, g, gdot:
  -0.000179   0.024151   0.000009  -0.003200   0.024319   0.000000
# Chi-squared of fit:    25.03 DOF:   84 RMS:  0.13
# Min/Max residuals:    -0.50    0.33
# Exact a, adot, b, bdot, g, gdot:
  1.555421E-05  2.383039E-02 -2.327066E-06 -3.162321E-03  2.419487E-02 -9.122435E-04
# Covariance matrix:
  1.2497E-13 -3.9581E-14 -1.8878E-16  1.2438E-15  6.5832E-14 -9.9580E-14
 -3.9581E-14  1.4818E-13  8.0323E-15 -1.8769E-14  6.2317E-14  1.5038E-12
 -1.8878E-16  8.0323E-15  5.7849E-14 -2.6583E-14  4.9035E-15  9.9313E-14
  1.2438E-15 -1.8769E-14 -2.6583E-14  2.8392E-14 -1.0570E-14 -2.3115E-13
  6.5832E-14  6.2317E-14  4.9035E-15 -1.0570E-14  1.1254E-13  8.4693E-13
 -9.9580E-14  1.5038E-12  9.9313E-14 -2.3115E-13  8.4693E-13  1.8521E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.924654   15.892394    0.927447   -0.006697   -0.416692  2456507.009328
# Heliocentric elements and errors
Epoch:              2456500.5000  =  2013/07/27
Mean Anomaly:          310.44946 +/-     0.068
Argument of Peri:      243.63066 +/-     0.087
Long of Asc Node:      187.78275 +/-     0.000
Inclination:             7.63884 +/-     0.000
Eccentricity:         0.07761855 +/-    0.0002
Semi-Major Axis:     43.80066671 +/-    0.0024
Time of Perihelion: 2471074.0518 +/-      19.8
Perihelion:          40.40092236 +/-    0.0070
Aphelion:            47.20041105 +/-    0.0071
Period (y)              289.8874 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           40.40067835 +/-    0.0006
Ecliptic Y           10.54152569 +/-    0.0001
Ecliptic Z           -0.66703504 +/-    0.0000
Ecliptic XDOT        -0.00084947 +/-    0.0000
Ecliptic YDOT         0.00256287 +/-    0.0000
Ecliptic ZDOT        -0.00035599 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.75863397 +/-    0.0005
Geocenter to KBO     41.33107477 +/-    0.0006
# Hcoef:  8.28

The following table shows the complete astrometric record for 13UG17. 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 (13UG17) followed by the observatory code and reference code for the source of the astrometry.

2013 08  02.50855  00 59 59.306  +05 23 59.07  24.4r 13UG17    568  C~2NKY      
2013 08  02.55128  00 59 59.245  +05 23 58.57  24.3r 13UG17    568  C~2NKY      
2013 08  11.50755  00 59 44.526  +05 21 57.64  25.5r 13UG17    568  C~2NKY      
2013 08  30.42396  00 58 54.136  +05 15 46.80  23.9r 13UG17    568  C~2NKY      
2013 08  31.42817  00 58 50.823  +05 15 23.23  24.4r 13UG17    568  C~2NKY      
2013 08  31.47118  00 58 50.664  +05 15 22.38  24.5r 13UG17    568  C~2NKY      
2013 09  04.40817  00 58 37.075  +05 13 46.30  24.2r 13UG17    568  C~2NKY      
2013 09  04.45095  00 58 36.935  +05 13 45.37  24.4r 13UG17    568  C~2NKY      
2013 10  06.38359  00 56 24.257  +04 58 40.59  24.0r 13UG17    568  C~2NKY      
2013 10  06.44798  00 56 23.960  +04 58 38.41  24.4r 13UG17    568  C~2NKY      
2013 10  06.45762  00 56 23.907  +04 58 38.24  24.2r 13UG17    568  C~2NKY      
2013 10  06.46264  00 56 23.890  +04 58 38.33  25.0r 13UG17    568  C~2NKY      
2013 10  09.51275  00 56 10.198  +04 57 06.64  24.3r 13UG17    568  C~2NKY      
2013 10  31.23096  00 54 36.014  +04 46 42.37  24.1r 13UG17    568  C~2NKY      
2013 10  31.27407  00 54 35.805  +04 46 40.99  24.5r 13UG17    568  C~2NKY      
2013 10  31.31685  00 54 35.625  +04 46 40.00  24.0r 13UG17    568  C~2NKY      
2013 11  01.25731  00 54 31.846  +04 46 14.91  24.2r 13UG17    568  C~2NKY      
2013 11  05.38291  00 54 15.608  +04 44 28.16  24.6r 13UG17    568  C~2NKY      
2013 11  29.22005  00 53 00.351  +04 36 14.82  24.6r 13UG17    568  C~2NKY      
2013 12  04.24712  00 52 49.460  +04 35 03.50  24.6r 13UG17    568  C~2NKY      
2013 12  04.29457  00 52 49.359  +04 35 02.72  25.2r 13UG17    568  C~2NKY      
2013 12  06.21068  00 52 45.765  +04 34 39.35  23.5r 13UG17    568  C~2NKY      
2014 06  27.59003  01 05 06.240  +05 46 04.18  24.5r 13UG17    568  C~2NKY      
2014 06  28.59510  01 05 08.162  +05 46 12.48  24.3r 13UG17    568  C~2NKY      
2014 07  24.54140  01 05 27.570  +05 46 38.43  24.5r 13UG17    568  C~2NKY      
2014 07  27.57207  01 05 26.026  +05 46 17.99  24.3r 13UG17    568  C~2NKY      
2014 08  22.59325  01 04 41.860  +05 40 15.68  25.0r 13UG17    568  C~2NKY      
2014 08  28.43479  01 04 25.051  +05 38 13.11  24.6r 13UG17    568  C~2NKY      
2014 10  23.35625  01 00 34.695  +05 12 13.41  24.2r 13UG17    568  C~2NKY      
2014 10  23.37571  01 00 34.630  +05 12 12.88  24.4r 13UG17    568  C~2NKY      
2014 10  26.45174  01 00 21.328  +05 10 45.71  21.9r 13UG17    568  C~2NKY      
2014 10  27.39496  01 00 17.296  +05 10 19.63  24.3r 13UG17    568  C~2NKY      
2014 10  27.41437  01 00 17.203  +05 10 19.09  25.2r 13UG17    568  C~2NKY      
2014 11  24.24776  00 58 35.703  +04 59 21.58  24.0r 13UG17    568  C~2NKY      
2014 11  24.27889  00 58 35.606  +04 59 21.04  25.1r 13UG17    568  C~2NKY      
2014 11  25.24396  00 58 32.891  +04 59 03.80  24.8r 13UG17    568  C~2NKY      
2014 11  25.30520  00 58 32.709  +04 59 02.11  23.2r 13UG17    568  C~2NKY      
2014 12  17.27056  00 57 50.487  +04 54 32.50  24.1r 13UG17    568  C~2NKY      
2015 01  17.27935  00 58 03.501  +04 55 52.63  24.6r 13UG17    568  C~2NKY      
2015 08  20.52313  01 10 11.756  +06 02 21.52  24.3r 13UG17    568  C~2NKY      
2015 12  07.37370  01 03 26.762  +05 17 32.30  24.8w 13UG17    568  C~2NKY      
2017 07  24.60098  01 21 32.734  +06 49 28.35  24.2w 13UG17    568  C~2NKY      
2017 08  25.51775  01 20 49.059  +06 42 50.69  24.6w 13UG17    568  C~2NKY      
2017 08  30.45989  01 20 35.232  +06 41 08.63  24.6w 13UG17    568  C~2NKY      
2017 08  30.50665  01 20 35.096  +06 41 07.51  24.7w 13UG17    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     0.00       0.00     0.05
  2   0.0001     -1.03    -0.05      -0.11     0.05
  3   0.0246   -250.44    -0.50     -27.27    -0.36
  4   0.0764  -1087.78    -0.01     -80.21     0.05
  5   0.0792  -1142.53     0.16     -82.93     0.01
  6   0.0793  -1145.05     0.06     -82.80     0.23
  7   0.0901  -1369.38    -0.05     -93.38    -0.01
  8   0.0902  -1371.67     0.22     -93.44     0.03
  9   0.1776  -3549.83     0.03    -164.86     0.01
 10   0.1778  -3554.77    -0.10    -165.16    -0.21
 11   0.1778  -3555.57    -0.18    -165.01    -0.05
 12   0.1778  -3555.77    -0.00    -164.83     0.14
 13   0.1862  -3779.98     0.15    -170.53    -0.05
 14   0.2456  -5320.28     0.33    -203.19    -0.00
 15   0.2458  -5323.69    -0.19    -203.25    -0.03
 16   0.2459  -5326.56    -0.18    -203.13     0.12
 17   0.2485  -5388.40    -0.05    -204.46    -0.04
 18   0.2598  -5653.71    -0.18    -209.17    -0.07
 19   0.3250  -6883.20     0.25    -229.31    -0.04
 20   0.3388  -7061.15     0.10    -232.11    -0.00
 21   0.3389  -7062.85    -0.02    -232.24    -0.14
 22   0.3442  -7121.51     0.14    -233.01     0.12
 23   0.9010   4740.96    -0.01    -532.46    -0.04
 24   0.9037   4770.65     0.06    -535.76    -0.02
 25   0.9748   5048.38     0.03    -622.52     0.02
 26   0.9831   5019.26     0.06    -632.60     0.01
 27   1.0543   4271.25     0.05    -715.38     0.16
 28   1.0703   3992.43     0.13    -732.65     0.20
 29   1.2234    216.91    -0.26    -854.57     0.00
 30   1.2235    215.81     0.05    -854.69    -0.10
 31   1.2319     -1.14     0.08    -858.85    -0.25
 32   1.2345    -66.77     0.05    -859.79     0.01
 33   1.2345    -68.26    -0.07    -859.75     0.06
 34   1.3107  -1721.06     0.02    -883.67     0.03
 35   1.3108  -1722.61    -0.05    -883.61     0.09
 36   1.3134  -1766.69     0.04    -883.91     0.28
 37   1.3136  -1769.85    -0.28    -884.42    -0.23
 38   1.3737  -2456.07     0.05    -890.39    -0.01
 39   1.4586  -2245.69     0.05    -891.32     0.04
 40   2.0480   9333.37     0.11   -1367.65    -0.00
 41   2.3460   2713.08    -0.02   -1545.89    -0.04
 42   3.9756  19855.11     0.13   -2590.33     0.03
 43   4.0630  19096.18    -0.07   -2714.96     0.02
 44   4.0765  18864.99    -0.08   -2732.15     0.03
 45   4.0767  18862.68    -0.03   -2732.43    -0.12

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.

13UG17    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.028    44.035    44.021
ecceobj         0.079     0.079     0.079
incobj          7.617     7.617     7.617
qmin           39.249    38.962    39.507
qmax           48.499    48.780    48.315
amean          43.722    43.734    43.729
amin           43.344    43.328    43.331
amax           44.136    44.146    44.134
emean           0.080     0.083     0.076
emin            0.055     0.060     0.053
emax            0.100     0.106     0.095
imean           8.124     7.967     8.356
imin            7.298     7.103     7.364
imax            8.878     8.880     9.129
excite_mean     0.162     0.162     0.164
fracstop        1.000     1.000     1.000
cjmean          3.067     3.067     3.066

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       180.4     180.5     178.4
kozaiamp        179.9     179.9     180.0