Orbit Fit and Astrometric record for 13UE18

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: 13UE18    
# Created Sat Dec 16 02:37:58 2017
# Orbit generated from Bernstein formalism
# Fitting   30 observations of   30
# Arc:   1.46y
# First observation: 2013/08/02
#  Last observation: 2015/01/18
Preliminary a, adot, b, bdot, g, gdot:
  -0.000164   0.025102   0.000000   0.000996   0.024537   0.000000
# Chi-squared of fit:     9.50 DOF:   54 RMS:  0.10
# Min/Max residuals:    -0.24    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.642657E-05  2.489061E-02  6.314023E-07  9.958337E-04  2.443274E-02  1.142865E-03
# Covariance matrix:
  3.3727E-13  8.3942E-14 -1.7114E-15  2.2487E-14  3.6994E-13  1.7537E-11
  8.3942E-14  3.8681E-13 -2.3174E-15  2.4329E-14  3.3085E-13  1.8749E-11
 -1.7114E-15 -2.3174E-15  1.0857E-13 -1.0991E-13 -3.4166E-15 -2.7291E-13
  2.2487E-14  2.4329E-14 -1.0991E-13  2.0249E-13  4.0326E-14  2.5887E-12
  3.6994E-13  3.3085E-13 -3.4166E-15  4.0326E-14  6.1167E-13  3.1282E-11
  1.7537E-11  1.8749E-11 -2.7291E-13  2.5887E-12  3.1282E-11  1.9823E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.932644   18.924033    0.947963   -0.005953   -0.367620  2456507.044298
# Heliocentric elements and errors
Epoch:              2456500.5000  =  2013/07/27
Mean Anomaly:           11.63466 +/-     0.949
Argument of Peri:      323.73906 +/-     1.156
Long of Asc Node:       39.77059 +/-     0.009
Inclination:             2.44863 +/-     0.001
Eccentricity:         0.09307482 +/-    0.0005
Semi-Major Axis:     45.43057275 +/-    0.0054
Time of Perihelion: 2452885.8039 +/-     295.0
Perihelion:          41.20213037 +/-    0.0235
Aphelion:            49.65901514 +/-    0.0238
Period (y)              306.2179 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           39.36630237 +/-    0.0012
Ecliptic Y           12.49765735 +/-    0.0004
Ecliptic Z           -0.66612973 +/-    0.0000
Ecliptic XDOT        -0.00078795 +/-    0.0000
Ecliptic YDOT         0.00267970 +/-    0.0000
Ecliptic ZDOT         0.00010963 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.30787976 +/-    0.0012
Geocenter to KBO     40.92868927 +/-    0.0013
# Hcoef:  8.26

The following table shows the complete astrometric record for 13UE18. 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 (13UE18) followed by the observatory code and reference code for the source of the astrometry.

2013 08  02.54352  01 11 16.175  +06 32 56.60  24.6r 13UE18    568  C~2NKc      
2013 08  02.58624  01 11 16.132  +06 32 56.44  25.1r 13UE18    568  C~2NKc      
2013 08  31.46342  01 10 12.166  +06 26 08.39  24.1r 13UE18    568  C~2NKc      
2013 08  31.52899  01 10 11.947  +06 26 06.98  24.2r 13UE18    568  C~2NKc      
2013 09  04.44319  01 09 58.751  +06 24 45.42  24.2r 13UE18    568  C~2NKc      
2013 09  04.51807  01 09 58.511  +06 24 43.64  23.8r 13UE18    568  C~2NKc      
2013 10  06.42466  01 07 45.818  +06 11 14.08  23.9r 13UE18    568  C~2NKc      
2013 10  09.55440  01 07 31.459  +06 09 47.62  23.9r 13UE18    568  C~2NKc      
2013 10  31.26631  01 05 53.951  +06 00 07.31  24.0r 13UE18    568  C~2NKc      
2013 10  31.30910  01 05 53.767  +06 00 06.30  24.3r 13UE18    568  C~2NKc      
2013 10  31.35182  01 05 53.576  +06 00 05.17  24.4r 13UE18    568  C~2NKc      
2013 11  01.29289  01 05 49.591  +05 59 41.77  24.3r 13UE18    568  C~2NKc      
2013 11  01.42381  01 05 49.020  +05 59 38.44  24.4r 13UE18    568  C~2NKc      
2013 11  05.47053  01 05 32.246  +05 58 00.47  24.0r 13UE18    568  C~2NKc      
2013 11  07.44359  01 05 24.329  +05 57 14.16  24.3r 13UE18    568  C~2NKc      
2013 11  07.45135  01 05 24.290  +05 57 14.01  24.5r 13UE18    568  C~2NKc      
2013 11  07.48378  01 05 24.188  +05 57 13.16  24.4r 13UE18    568  C~2NKc      
2013 12  04.28292  01 03 58.623  +05 49 09.04  24.6r 13UE18    568  C~2NKc      
2013 12  04.33509  01 03 58.502  +05 49 08.38  24.0r 13UE18    568  C~2NKc      
2014 06  27.61338  01 16 07.060  +07 06 32.44  25.0r 13UE18    568  C~2NKc      
2014 07  24.57652  01 16 34.991  +07 09 00.41  24.7r 13UE18    568  C~2NKc      
2014 07  27.60731  01 16 34.123  +07 08 53.01  24.9r 13UE18    568  C~2NKc      
2014 08  22.60340  01 15 54.834  +07 04 39.19  24.5r 13UE18    568  C~2NKc      
2014 08  28.44260  01 15 38.780  +07 02 59.64  24.0r 13UE18    568  C~2NKc      
2014 10  27.38719  01 11 29.494  +06 38 02.55  24.0r 13UE18    568  C~2NKc      
2014 11  19.19777  01 09 58.112  +06 29 13.82  23.9r 13UE18    568  C~2NKc      
2014 11  19.26507  01 09 57.878  +06 29 12.43  24.6r 13UE18    568  C~2NKc      
2014 11  25.21441  01 09 38.480  +06 27 23.51  23.8r 13UE18    568  C~2NKc      
2014 12  17.23891  01 08 49.523  +06 23 03.10  23.6r 13UE18    568  C~2NKc      
2015 01  18.22533  01 08 54.787  +06 24 38.24  24.6r 13UE18    568  C~2NKc      

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    -0.07       0.00     0.00
  2   0.0001     -0.65     0.08       0.09     0.11
  3   0.0792  -1037.53     0.05     -16.21    -0.02
  4   0.0794  -1041.08     0.01     -16.27    -0.09
  5   0.0901  -1254.02    -0.24     -17.13     0.28
  6   0.0903  -1258.01     0.07     -17.42    -0.03
  7   0.1776  -3395.90    -0.01     -14.86     0.03
  8   0.1862  -3626.90     0.02     -13.38    -0.08
  9   0.2456  -5193.41     0.04       3.82    -0.07
 10   0.2458  -5196.34     0.08       3.94    -0.02
 11   0.2459  -5199.40    -0.02       3.98    -0.05
 12   0.2485  -5263.32     0.03       5.00    -0.00
 13   0.2488  -5272.47    -0.11       5.17    -0.04
 14   0.2599  -5541.35    -0.09       9.99     0.17
 15   0.2653  -5668.29     0.01      12.22     0.03
 16   0.2653  -5668.89    -0.09      12.30     0.10
 17   0.2654  -5670.62     0.28      12.10    -0.15
 18   0.3388  -7036.75    -0.04      51.86    -0.08
 19   0.3389  -7038.68    -0.04      51.94    -0.11
 20   0.9009   4773.61     0.06     230.77    -0.01
 21   0.9748   5214.72     0.10     211.42    -0.09
 22   0.9831   5199.96     0.12     209.42    -0.00
 23   1.0542   4562.27    -0.04     194.35    -0.07
 24   1.0702   4303.27    -0.24     192.12     0.02
 25   1.2343    299.55    -0.05     208.01    -0.03
 26   1.2968  -1161.02     0.10     234.82     0.02
 27   1.2970  -1164.77     0.11     234.86    -0.07
 28   1.3133  -1473.61    -0.08     243.78     0.22
 29   1.3736  -2247.65     0.02     279.95     0.07
 30   1.4611  -2138.91    -0.07     338.15    -0.06

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.

13UE18    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        45.695    45.720    45.672
ecceobj         0.099     0.101     0.097
incobj          2.444     2.444     2.444
qmin           40.383    40.339    40.444
qmax           50.635    50.756    50.543
amean          45.372    45.397    45.350
amin           45.001    45.028    44.981
amax           45.776    45.796    45.748
emean           0.093     0.095     0.092
emin            0.079     0.080     0.077
emax            0.107     0.109     0.105
imean           1.875     1.873     1.877
imin            1.267     1.263     1.274
imax            2.403     2.404     2.401
excite_mean     0.099     0.101     0.098
fracstop        1.000     1.000     1.000
cjmean          3.106     3.106     3.106

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       179.0     179.1     178.5
kozaiamp        180.0     180.0     179.9