Orbit Fit and Astrometric record for 13UN17

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: 13UN17    
# Created Sat Dec 16 02:37:58 2017
# Orbit generated from Bernstein formalism
# Fitting   38 observations of   39
# Arc:   4.08y
# First observation: 2013/08/02
#  Last observation: 2017/08/30
Preliminary a, adot, b, bdot, g, gdot:
  -0.000162   0.021467  -0.000004   0.000829   0.022818   0.000000
# Chi-squared of fit:    11.02 DOF:   70 RMS:  0.10
# Min/Max residuals:    -0.18    0.37
# Exact a, adot, b, bdot, g, gdot:
  1.518204E-05  2.126849E-02  2.209199E-07  8.233873E-04  2.276328E-02  9.520556E-05
# Covariance matrix:
  1.7615E-13 -2.7860E-14  9.6147E-16  2.9248E-16  1.0697E-13  1.5432E-13
 -2.7860E-14  1.9028E-13 -1.7081E-15  6.8477E-15  7.2671E-14  2.2170E-12
  9.6147E-16 -1.7081E-15  6.0043E-14 -2.4164E-14  1.0509E-16 -2.1500E-14
  2.9248E-16  6.8477E-15 -2.4164E-14  2.6870E-14  3.4611E-15  9.3533E-14
  1.0697E-13  7.2671E-14  1.0509E-16  3.4611E-15  1.3397E-13  1.1763E-12
  1.5432E-13  2.2170E-12 -2.1500E-14  9.3533E-14  1.1763E-12  3.0387E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.009338   16.286800    0.930238   -0.014364   -0.410221  2456507.017088
# Heliocentric elements and errors
Epoch:              2456500.5000  =  2013/07/27
Mean Anomaly:          228.92080 +/-     0.368
Argument of Peri:       90.70380 +/-     0.367
Long of Asc Node:       57.55211 +/-     0.006
Inclination:             2.94650 +/-     0.000
Eccentricity:         0.02538940 +/-    0.0002
Semi-Major Axis:     43.60816548 +/-    0.0025
Time of Perihelion: 2494798.9715 +/-     107.4
Perihelion:          42.50098052 +/-    0.0091
Aphelion:            44.71535044 +/-    0.0091
Period (y)              287.9784 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           42.79618123 +/-    0.0007
Ecliptic Y           11.53786770 +/-    0.0002
Ecliptic Z           -1.54025123 +/-    0.0000
Ecliptic XDOT        -0.00070931 +/-    0.0000
Ecliptic YDOT         0.00245877 +/-    0.0000
Ecliptic ZDOT         0.00009871 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.35096270 +/-    0.0007
Geocenter to KBO     43.93039765 +/-    0.0007
# Hcoef:  7.96

The following table shows the complete astrometric record for 13UN17. 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 (13UN17) followed by the observatory code and reference code for the source of the astrometry.

2013 08  02.51631  01 03 07.272  +04 32 57.54  24.4r 13UN17    568  C~2NKZ      
2013 08  02.55904  01 03 07.222  +04 32 57.01  24.6r 13UN17    568  C~2NKZ      
2013 08  30.43177  01 02 04.939  +04 25 38.29  24.2r 13UN17    568  C~2NKZ      
2013 08  31.43593  01 02 01.766  +04 25 17.35  24.5r 13UN17    568  C~2NKZ      
2013 08  31.47896  01 02 01.623  +04 25 16.36  24.1r 13UN17    568  C~2NKZ      
2013 09  04.41593  01 01 48.651  +04 23 50.79  24.1r 13UN17    568  C~2NKZ      
2013 10  06.39713  00 59 41.475  +04 10 26.41  24.3r 13UN17    568  C~2NKZ      
2013 10  06.47088  00 59 41.178  +04 10 24.38  24.1r 13UN17    568  C~2NKZ      
2013 10  06.47992  00 59 41.113  +04 10 23.98  23.8r 13UN17    568  C~2NKZ      
2013 10  09.52057  00 59 27.977  +04 09 03.75  24.2r 13UN17    568  C~2NKZ      
2013 10  31.23884  00 57 57.029  +04 00 01.89  24.1r 13UN17    568  C~2NKZ      
2013 10  31.28183  00 57 56.860  +04 00 01.18  24.5r 13UN17    568  C~2NKZ      
2013 10  31.32461  00 57 56.697  +03 59 59.98  24.0r 13UN17    568  C~2NKZ      
2013 11  01.26510  00 57 53.001  +03 59 38.58  24.4r 13UN17    568  C~2NKZ      
2013 11  01.38800  00 57 52.509  +03 59 36.01  24.1r 13UN17    568  C~2NKZ      
2013 11  05.42210  00 57 37.094  +03 58 07.28  24.3r 13UN17    568  C~2NKZ      
2013 11  29.22781  00 56 22.986  +03 51 23.64  24.8r 13UN17    568  C~2NKZ      
2013 11  29.23325  00 56 22.932  +03 51 23.57  24.3r 13UN17    568  C~2NKZ      
2013 11  29.23812  00 56 22.920  +03 51 23.58  24.4r 13UN17    568  C~2NKZ      
2013 11  29.27951  00 56 22.815  +03 51 22.93  24.4r 13UN17    568  C~2NKZ      
2013 11  29.28398  00 56 22.797  +03 51 22.91  23.6r 13UN17    568  C~2NKZ      
2013 11  29.30546  00 56 22.744  +03 51 22.74  24.5r 13UN17    568  C~2NKZ      
2013 12  04.25494  00 56 11.917  +03 50 29.90  24.3r 13UN17    568  C~2NKZ      
2013 12  04.30703  00 56 11.805  +03 50 29.33  24.6r 13UN17    568  C~2NKZ      
2013 12  05.25309  00 56 09.941  +03 50 20.80  24.4r 13UN17    568  C~2NKZ      
2014 06  28.59119  01 07 24.146  +05 03 52.04  24.8r 13UN17    568  C~2NKZ      
2014 07  24.54916  01 07 41.232  +05 04 35.84  24.1r 13UN17    568  C~2NKZ      
2014 07  27.57991  01 07 39.638  +05 04 18.87  24.1r 13UN17    568  C~2NKZ      
2014 10  23.36792  01 02 59.754  +04 34 18.09  24.2r 13UN17    568  C~2NKZ      
2014 10  27.40661  01 02 42.942  +04 32 39.63  24.1r 13UN17    568  C~2NKZ      
2014 11  24.23611  01 01 04.114  +04 23 24.97  24.6r 13UN17    568  C~2NKZ      
2014 11  25.23226  01 01 01.340  +04 23 10.43  24.9r 13UN17    568  C~2NKZ      
2014 12  17.26663  01 00 18.288  +04 19 50.48  24.3r 13UN17    568  C~2NKZ      
2015 01  17.29797  01 00 25.878  +04 22 23.59  24.4r 13UN17    568  C~2NKZ      
2015 12  07.37370  01 05 00.494  +04 51 32.45  24.2w 13UN17    568  C~2NKZ      
2017 07  24.60098  01 21 00.604  +06 35 06.34  24.5w 13UN17    568  C~2NKZ      
2017 08  25.51775  01 20 16.218  +06 29 40.26  24.6w 13UN17    568  C~2NKZ      
2017 08  30.45989  01 20 02.736  +06 28 12.25  24.5w 13UN17    568  C~2NKZ      
2017 08  30.50665  01 20 02.603  +06 28 11.28  24.6w 13UN17    568  C~2NKZ      

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    -0.08       0.00     0.07
  2   0.0001     -0.89    -0.05      -0.20    -0.06
  3   0.0764  -1029.30    -0.06     -48.55    -0.08
  4   0.0792  -1081.16     0.03     -49.69     0.06
  5   0.0793  -1083.51    -0.04     -49.79     0.00
  6   0.0901  -1295.51     0.07     -54.44     0.05
  7   0.1776  -3361.13     0.03     -67.22     0.08
  8   0.1778  -3366.01     0.37     -67.38    -0.15
  9   0.1779  -3367.06    -0.04     -67.38    -0.15
 10   0.1862  -3579.38    -0.14     -65.97    -0.11
 11   0.2456  -5044.54    -0.02     -43.18    -0.08
 12   0.2458  -5047.15     0.12     -42.87     0.15
 13   0.2459  -5049.86     0.16     -43.04    -0.10
 14   0.2485  -5109.18    -0.04     -41.52    -0.07
 15   0.2488  -5116.97    -0.00     -41.06     0.13
 16   0.2598  -5364.18     0.08     -34.24    -0.02
 17   0.3250  -6544.12 (   0.55)     20.03 (  -0.18)
 18   0.3250  -6544.89    -0.01      20.27     0.05
 19   0.3250  -6545.05     0.01      20.35     0.11
 20   0.3252  -6546.75    -0.10      20.36    -0.01
 21   0.3252  -6547.01    -0.18      20.44     0.06
 22   0.3252  -6547.81    -0.15      20.59     0.14
 23   0.3388  -6717.88     0.08      34.22    -0.01
 24   0.3389  -6719.64     0.00      34.34    -0.06
 25   0.3415  -6748.71    -0.02      37.21     0.12
 26   0.9037   4257.47     0.09     245.76    -0.02
 27   0.9748   4510.27    -0.02     188.83    -0.01
 28   0.9831   4481.77    -0.08     182.23    -0.18
 29   1.2234    -72.99     0.06     117.47    -0.10
 30   1.2345   -342.91    -0.03     122.82     0.10
 31   1.3107  -1920.60    -0.09     177.20    -0.02
 32   1.3134  -1964.49    -0.08     179.69    -0.04
 33   1.3737  -2635.92     0.13     242.19     0.20
 34   1.4587  -2472.29     0.08     340.00    -0.08
 35   2.3459   1990.50    -0.04     382.26     0.04
 36   3.9756  17648.87     0.00     697.00    -0.09
 37   4.0630  16908.17     0.02     643.42     0.01
 38   4.0765  16687.42    -0.03     637.46     0.09
 39   4.0766  16685.21     0.01     637.31    -0.03

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.

13UN17    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.831    43.839    43.823
ecceobj         0.020     0.020     0.020
incobj          2.944     2.944     2.944
qmin           41.333    41.364    41.338
qmax           45.998    45.976    46.015
amean          43.577    43.584    43.569
amin           43.243    43.246    43.236
amax           43.921    43.932    43.916
emean           0.030     0.030     0.030
emin            0.012     0.011     0.011
emax            0.047     0.047     0.048
imean           1.711     1.713     1.709
imin            0.863     0.866     0.858
imax            2.413     2.411     2.416
excite_mean     0.043     0.043     0.043
fracstop        1.000     1.000     1.000
cjmean          3.094     3.094     3.094

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       170.7     170.6     170.7
kozaiamp        180.0     179.9     180.0