Orbit Fit and Astrometric record for 13UN15

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: 13UN15    
# Created Sat Dec 16 02:37:57 2017
# Orbit generated from Bernstein formalism
# Fitting   44 observations of   44
# Arc:   3.98y
# First observation: 2013/08/02
#  Last observation: 2017/07/24
Preliminary a, adot, b, bdot, g, gdot:
  -0.000115   0.020944  -0.000005  -0.001049   0.022381   0.000000
# Chi-squared of fit:    19.26 DOF:   82 RMS:  0.12
# Min/Max residuals:    -0.63    0.39
# Exact a, adot, b, bdot, g, gdot:
  1.493503E-05  2.088137E-02 -6.975765E-07 -1.047925E-03  2.237944E-02  1.572144E-03
# Covariance matrix:
  1.1032E-13 -2.2453E-14  9.3013E-16 -5.9574E-16  7.0761E-14  1.4963E-13
 -2.2453E-14  1.2660E-13  2.2905E-15 -5.7432E-15  6.5635E-14  1.8112E-12
  9.3013E-16  2.2905E-15  5.9927E-14 -3.4011E-14  2.5732E-15  4.8190E-14
 -5.9574E-16 -5.7432E-15 -3.4011E-14  4.3032E-14 -4.2566E-15 -1.2425E-13
  7.0761E-14  6.5635E-14  2.5732E-15 -4.2566E-15  1.2950E-13  1.2940E-12
  1.4963E-13  1.8112E-12  4.8190E-14 -1.2425E-13  1.2940E-12  3.9258E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.709276   17.484968    0.938538   -0.011637   -0.390942  2456507.028758
# Heliocentric elements and errors
Epoch:              2456500.5000  =  2013/07/27
Mean Anomaly:           83.79190 +/-     0.059
Argument of Peri:      120.50321 +/-     0.049
Long of Asc Node:      166.07434 +/-     0.005
Inclination:             3.36272 +/-     0.000
Eccentricity:         0.05193743 +/-    0.0003
Semi-Major Axis:     45.21695394 +/-    0.0029
Time of Perihelion: 2430651.1329 +/-      17.9
Perihelion:          42.86850177 +/-    0.0138
Aphelion:            47.56540612 +/-    0.0138
Period (y)              304.0606 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           43.25509509 +/-    0.0007
Ecliptic Y           12.64502582 +/-    0.0002
Ecliptic Z           -1.33282270 +/-    0.0000
Ecliptic XDOT        -0.00059405 +/-    0.0000
Ecliptic YDOT         0.00249234 +/-    0.0000
Ecliptic ZDOT        -0.00013374 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.08521205 +/-    0.0007
Geocenter to KBO     44.68386262 +/-    0.0007
# Hcoef:  7.38

The following table shows the complete astrometric record for 13UN15. 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 (13UN15) followed by the observatory code and reference code for the source of the astrometry.

2013 08  02.52798  01 07 06.250  +05 17 02.80  23.9r 13UN15    568  C~2NKU      
2013 08  02.57069  01 07 06.200  +05 17 02.41  24.2r 13UN15    568  C~2NKU      
2013 08  30.44360  01 06 07.590  +05 09 47.12  23.8r 13UN15    568  C~2NKU      
2013 08  31.44775  01 06 04.540  +05 09 25.96  23.8r 13UN15    568  C~2NKU      
2013 08  31.49065  01 06 04.416  +05 09 25.02  24.0r 13UN15    568  C~2NKU      
2013 08  31.50871  01 06 04.355  +05 09 24.57  23.8r 13UN15    568  C~2NKU      
2013 09  04.42758  01 05 51.955  +05 07 59.60  23.8r 13UN15    568  C~2NKU      
2013 09  04.47051  01 05 51.797  +05 07 58.52  23.8r 13UN15    568  C~2NKU      
2013 09  04.47904  01 05 51.797  +05 07 58.34  23.7r 13UN15    568  C~2NKU      
2013 09  04.49657  01 05 51.738  +05 07 58.42  23.9r 13UN15    568  C~2NKU      
2013 09  04.50244  01 05 51.692  +05 07 57.85  24.1r 13UN15    568  C~2NKU      
2013 09  04.52303  01 05 51.620  +05 07 57.24  24.1r 13UN15    568  C~2NKU      
2013 10  06.40889  01 03 48.506  +04 54 29.71  23.6r 13UN15    568  C~2NKU      
2013 10  06.49158  01 03 48.144  +04 54 27.42  23.5r 13UN15    568  C~2NKU      
2013 10  06.49617  01 03 48.129  +04 54 27.44  23.4r 13UN15    568  C~25nm      
2013 10  09.53885  01 03 35.239  +04 53 05.41  23.7r 13UN15    568  C~2NKU      
2013 10  31.25056  01 02 05.906  +04 43 49.00  24.0r 13UN15    568  C~25nm      
2013 10  31.29355  01 02 05.728  +04 43 47.91  23.3r 13UN15    568  C~25nm      
2013 10  31.33628  01 02 05.557  +04 43 46.98  23.5r 13UN15    568  C~25nm      
2013 11  01.27683  01 02 01.927  +04 43 24.70  24.0r 13UN15    568  C~2NKU      
2013 11  01.40318  01 02 01.439  +04 43 21.82  24.4r 13UN15    568  C~2NKU      
2013 11  05.45493  01 01 46.118  +04 41 48.70  23.7r 13UN15    568  C~2NKU      
2013 11  29.31710  01 00 32.178  +04 34 33.91  24.0r 13UN15    568  C~2NKU      
2013 12  04.26738  01 00 21.234  +04 33 33.30  23.4r 13UN15    568  C~2NKU      
2013 12  04.31956  01 00 21.135  +04 33 32.62  24.1r 13UN15    568  C~2NKU      
2014 06  27.59782  01 11 22.524  +05 41 16.43  23.8r 13UN15    568  C~2NKU      
2014 06  28.60286  01 11 24.369  +05 41 24.40  24.1r 13UN15    568  C~2NKU      
2014 07  24.56087  01 11 44.118  +05 42 03.10  23.8r 13UN15    568  C~2NKU      
2014 08  22.56426  01 11 03.609  +05 36 30.40  23.8r 13UN15    568  C~2NKU      
2014 08  29.52684  01 10 45.116  +05 34 19.83  24.2r 13UN15    568  C~2NKU      
2014 08  29.61463  01 10 44.857  +05 34 18.12  23.9r 13UN15    568  C~2NKU      
2014 10  23.36016  01 07 13.740  +05 11 32.26  23.4r 13UN15    568  C~2NKU      
2014 10  27.39884  01 06 57.226  +05 09 50.85  23.6r 13UN15    568  C~2NKU      
2014 11  24.24000  01 05 19.295  +05 00 08.23  23.7r 13UN15    568  C~2NKU      
2014 11  25.23617  01 05 16.517  +04 59 52.43  23.6r 13UN15    568  C~2NKU      
2014 12  17.25486  01 04 32.936  +04 55 59.42  23.7r 13UN15    568  C~2NKU      
2015 01  17.23854  01 04 38.128  +04 57 33.88  23.9r 13UN15    568  C~2NKU      
2015 08  20.51066  01 15 41.787  +06 01 00.49  23.6r 13UN15    568  C~2NKU      
2015 10  15.30155  01 12 23.405  +05 39 17.77  23.5r 13UN15    568  C~2NKU      
2015 10  15.30564  01 12 23.384  +05 39 17.55  23.7r 13UN15    568  C~2NKU      
2015 10  15.35250  01 12 23.188  +05 39 16.38  23.4r 13UN15    568  C~2NKU      
2015 10  15.35660  01 12 23.165  +05 39 16.30  23.3r 13UN15    568  C~2NKU      
2015 12  07.37779  01 09 20.416  +05 21 18.02  24.3w 13UN15    568  C~2NKU      
2017 07  24.60098  01 25 13.488  +06 52 11.04  23.9w 13UN15    568  C~2NKU      

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    -0.04       0.00    -0.01
  2   0.0001     -0.84    -0.02      -0.08     0.01
  3   0.0764   -976.17     0.06     -68.76     0.12
  4   0.0792  -1026.36    -0.09     -70.94     0.05
  5   0.0793  -1028.43     0.04     -71.11    -0.04
  6   0.0793  -1029.45    -0.05     -71.18    -0.08
  7   0.0901  -1233.11     0.06     -79.06     0.02
  8   0.0902  -1235.70    -0.18     -79.16    -0.02
  9   0.0902  -1235.77     0.21     -79.32    -0.17
 10   0.0903  -1236.56     0.39     -78.91     0.27
 11   0.0903  -1237.41    -0.14     -79.18     0.01
 12   0.0903  -1238.64    -0.24     -79.33    -0.11
 13   0.1776  -3247.47     0.05    -123.25    -0.08
 14   0.1779  -3253.35    -0.07    -123.29    -0.10
 15   0.1779  -3253.55     0.05    -123.19     0.00
 16   0.1862  -3462.97    -0.63    -125.36    -0.14
 17   0.2456  -4910.14     0.09    -128.67     0.02
 18   0.2458  -4913.02    -0.05    -128.66    -0.00
 19   0.2459  -4915.74    -0.04    -128.54     0.09
 20   0.2485  -4974.43     0.04    -128.36     0.00
 21   0.2488  -4982.28     0.20    -128.22     0.03
 22   0.2599  -5229.67     0.08    -126.56    -0.04
 23   0.3252  -6418.32     0.12    -104.69     0.01
 24   0.3388  -6592.86     0.01     -97.94     0.06
 25   0.3389  -6594.49     0.12     -98.00    -0.10
 26   0.9009   4092.35     0.09    -110.40     0.24
 27   0.9037   4120.86     0.06    -113.47     0.05
 28   0.9748   4408.41     0.00    -189.48     0.09
 29   1.0542   3722.45    -0.11    -267.93    -0.04
 30   1.0732   3417.39     0.07    -283.94     0.02
 31   1.0735   3413.16     0.09    -284.05     0.06
 32   1.2234    -22.49    -0.03    -348.24     0.03
 33   1.2344   -289.22     0.07    -348.00    -0.04
 34   1.3106  -1864.07    -0.02    -328.58    -0.09
 35   1.3134  -1908.47    -0.08    -327.34    -0.06
 36   1.3737  -2599.45    -0.13    -294.04    -0.07
 37   1.4585  -2491.64    -0.04    -236.37     0.02
 38   2.0479   8125.04    -0.02    -478.95     0.00
 39   2.2006   4888.63     0.05    -564.89     0.04
 40   2.2006   4888.25    -0.04    -564.98    -0.04
 41   2.2008   4885.10     0.06    -564.95    -0.02
 42   2.2008   4884.75     0.00    -564.90     0.04
 43   2.3459   1950.21     0.01    -526.66     0.04
 44   3.9756  17211.39    -0.02    -834.25    -0.05

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.

13UN15    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        45.467    45.476    45.458
ecceobj         0.055     0.055     0.054
incobj          3.354     3.353     3.354
qmin           42.110    42.137    42.124
qmax           48.455    48.511    48.459
amean          45.190    45.198    45.183
amin           44.835    44.841    44.838
amax           45.561    45.575    45.560
emean           0.051     0.051     0.051
emin            0.037     0.037     0.037
emax            0.064     0.064     0.064
imean           3.361     3.360     3.361
imin            2.859     2.860     2.857
imax            3.801     3.811     3.813
excite_mean     0.078     0.078     0.078
fracstop        1.000     1.000     1.000
cjmean          3.109     3.109     3.109

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       176.7     176.4     177.4
kozaiamp        180.0     180.0     179.9