Orbit Fit and Astrometric record for 12EE18

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: 12EE18    
# Created Thu Apr 18 01:09:35 2019
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   61 observations of   61
# Arc:   6.13y
# First observation: 2011/04/02
#  Last observation: 2017/05/19
# Chi-squared of fit:    66.01 DOF:  116 RMS:  0.18
# Min/Max residuals:    -0.47    0.83
# Exact a, adot, b, bdot, g, gdot:
  1.891653E-05  3.051048E-02  3.014592E-06  6.389382E-03  2.617817E-02 -3.941656E-03
# Covariance matrix:
  2.2371E-13 -1.1502E-13  1.9175E-14 -1.8509E-14 -2.6982E-14 -4.2790E-13
 -1.1502E-13  9.7854E-14 -2.0726E-14  1.9533E-14  4.8819E-14  4.5309E-13
  1.9175E-14 -2.0726E-14  1.4210E-13 -3.3153E-14 -1.4013E-14 -1.0433E-13
 -1.8509E-14  1.9533E-14 -3.3153E-14  1.1530E-14  1.1108E-14  9.7873E-14
 -2.6982E-14  4.8819E-14 -1.4013E-14  1.1108E-14  1.2023E-13  2.6458E-13
 -4.2790E-13  4.5309E-13 -1.0433E-13  9.7873E-14  2.6458E-13  2.2718E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
  -11.591776 -159.328251    0.149203   -0.199428   -0.972065  2455653.931716
# Heliocentric elements and errors
Epoch:              2455654.5000  =  2011/04/03
Mean Anomaly:          351.33154 +/-     0.003
Argument of Peri:      340.13257 +/-     0.008
Long of Asc Node:      243.50366 +/-     0.000
Inclination:            16.31668 +/-     0.000
Eccentricity:         0.43987199 +/-    0.0001
Semi-Major Axis:     68.02667777 +/-    0.0072
Time of Perihelion: 2460589.1519 +/-      31.6
Perihelion:          38.10364733 +/-    0.0055
Aphelion:            97.94970822 +/-    0.0110
Period (y)              561.0830 +/-      0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -35.98823485 +/-    0.0005
Ecliptic Y          -13.42153617 +/-    0.0002
Ecliptic Z           -7.67562294 +/-    0.0001
Ecliptic XDOT         0.00137701 +/-    0.0000
Ecliptic YDOT        -0.00288437 +/-    0.0000
Ecliptic ZDOT         0.00073746 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.16903274 +/-    0.0004
Geocenter to KBO     38.19988263 +/-    0.0005
# Hcoef:  6.47

The following table shows the complete astrometric record for 12EE18. 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 (12EE18) followed by the observatory code and reference code for the source of the astrometry.

2011 04  02.43095  12 58 04.461  -18 46 43.18  22.2G 12EE18    F51  C~2rXt      
2011 04  03.40679  12 57 59.776  -18 46 14.01  21.7i 12EE18    F51  C~1w3q      
2011 04  03.41821  12 57 59.706  -18 46 13.84  22.0i 12EE18    F51  C~1w3q      
2011 06  08.27965  12 53 54.926  -18 08 35.75  22.3G 12EE18    F51  C~2rXt      
2012 03  14.50069  13 06 54.257  -19 14 43.63  21.9i 12EE18    F51  C~1w3q      
2012 03  14.51258  13 06 54.188  -19 14 43.23  21.7i 12EE18    F51  C~1w3q      
2012 04  24.35374  13 03 42.084  -18 54 50.37  22.2w 12EE18    F51  C~1w3q      
2012 04  24.36851  13 03 42.014  -18 54 50.06  22.5w 12EE18    F51  C~1w3q      
2012 04  24.38324  13 03 41.957  -18 54 49.50  22.0w 12EE18    F51  C~1w3q      
2012 04  24.39805  13 03 41.902  -18 54 49.00  22.1w 12EE18    F51  C~1w3q      
2013 05  04.35105  13 10 28.596  -19 08 49.97  22.1w 12EE18    F51  C~1w3q      
2013 05  04.36738  13 10 28.512  -19 08 49.42  22.0w 12EE18    F51  C~1w3q      
2013 05  04.38372  13 10 28.443  -19 08 48.62  22.1w 12EE18    F51  C~1w3q      
2013 05  04.40007  13 10 28.428  -19 08 47.94  22.0w 12EE18    F51  C~1w3q      
2014 01  18.62683  13 23 51.384  -19 52 45.17  21.7i 12EE18    F51  C~1w3q      
2014 04  10.39494  13 19 58.082  -19 41 14.57  21.4i 12EE18    F51  C~1w3q      
2014 04  10.41879  13 19 57.952  -19 41 13.99  21.3i 12EE18    F51  C~1w3q      
2014 04  10.43070  13 19 57.902  -19 41 13.56  21.7i 12EE18    F51  C~1w3q      
2014 04  30.35989  13 18 22.326  -19 30 10.83  21.8G 12EE18    F51  C~2rXt      
2014 04  30.37069  13 18 22.278  -19 30 10.30  22.1G 12EE18    F51  C~2rXt      
2014 04  30.38150  13 18 22.229  -19 30 09.90  21.8G 12EE18    F51  C~2rXt      
2014 04  30.39229  13 18 22.161  -19 30 09.34  21.9G 12EE18    F51  C~2rXt      
2015 01  31.61810  13 31 25.044  -20 12 14.69  22.3G 12EE18    F51  C~2rXt      
2015 01  31.62912  13 31 25.033  -20 12 15.11  22.0G 12EE18    F51  C~2rXt      
2015 01  31.64011  13 31 25.030  -20 12 15.19  22.7G 12EE18    F51  C~2rXt      
2015 01  31.65113  13 31 25.032  -20 12 15.18  22.5G 12EE18    F51  C~2rXt      
2015 02  01.59695  13 31 24.537  -20 12 24.30  22.1G 12EE18    F51  C~2rXt      
2015 06  16.33023  13 23 25.502  -19 22 05.82  22.0G 12EE18    F51  C~2rXt      
2016 02  03.62042  13 39 01.927  -20 28 14.28  22.1G 12EE18    F51  C~2rXt      
2016 03  05.50398  13 37 59.034  -20 27 35.17  22.6G 12EE18    F51  C~2rXt      
2016 03  05.51561  13 37 58.954  -20 27 35.15  22.5G 12EE18    F51  C~2rXt      
2016 03  05.52725  13 37 58.916  -20 27 35.04  21.8G 12EE18    F51  C~2rXt      
2016 03  05.53887  13 37 58.880  -20 27 34.89  22.3G 12EE18    F51  C~2rXt      
2016 03  06.48574  13 37 55.650  -20 27 24.09  22.0G 12EE18    F51  C~2rXt      
2016 03  06.49670  13 37 55.615  -20 27 23.88  22.2G 12EE18    F51  C~2rXt      
2016 03  06.50772  13 37 55.576  -20 27 23.93  22.3G 12EE18    F51  C~2rXt      
2016 04  09.43558  13 35 27.837  -20 15 30.81  22.1G 12EE18    F51  C~2rXt      
2016 04  09.44586  13 35 27.796  -20 15 30.48  22.2G 12EE18    F51  C~2rXt      
2016 04  09.45615  13 35 27.747  -20 15 30.13  22.1G 12EE18    F51  C~2rXt      
2016 04  09.46644  13 35 27.694  -20 15 29.95  22.4G 12EE18    F51  C~2rXt      
2016 05  02.35489  13 33 36.130  -20 03 15.90  23.4G 12EE18    F51  C~2rXt      
2016 05  02.36649  13 33 36.037  -20 03 15.52  22.4G 12EE18    F51  C~2rXt      
2016 05  02.37812  13 33 35.995  -20 03 14.86  22.0G 12EE18    F51  C~2rXt      
2016 05  02.38974  13 33 35.947  -20 03 14.45  22.4G 12EE18    F51  C~2rXt      
2016 06  08.29520  13 31 19.022  -19 42 32.08  22.3G 12EE18    F51  C~2rXt      
2016 06  08.30551  13 31 19.016  -19 42 31.79  22.3G 12EE18    F51  C~2rXt      
2016 06  08.31579  13 31 18.973  -19 42 31.49  22.3G 12EE18    F51  C~2rXt      
2016 06  08.32609  13 31 18.957  -19 42 31.18  22.3G 12EE18    F51  C~2rXt      
2017 02  03.62432  13 46 43.842  -20 42 47.17  21.5G 12EE18    F51  C~2rXt      
2017 02  21.57185  13 46 20.051  -20 43 41.77  20.3G 12EE18    F51  C~2rXt      
2017 03  04.58336  13 45 50.499  -20 42 33.96  22.3G 12EE18    F51  C~2rXt      
2017 03  04.60704  13 45 50.426  -20 42 33.84  22.5G 12EE18    F51  C~2rXt      
2017 03  04.61800  13 45 50.382  -20 42 33.50  23.7G 12EE18    F51  C~2rXt      
2017 03  04.62895  13 45 50.338  -20 42 33.27  22.6G 12EE18    F51  C~2rXt      
2017 03  18.51498  13 44 59.770  -20 39 22.93  20.2G 12EE18    F51  C~2rXt      
2017 03  19.49499  13 44 55.696  -20 39 05.79  22.8G 12EE18    F51  C~2rXt      
2017 03  27.50879  13 44 20.792  -20 36 22.64  22.0G 12EE18    F51  C~2rXt      
2017 03  27.51877  13 44 20.713  -20 36 22.41  22.3G 12EE18    F51  C~2rXt      
2017 03  27.52879  13 44 20.684  -20 36 22.22  21.8G 12EE18    F51  C~2rXt      
2017 03  27.53878  13 44 20.637  -20 36 22.01  21.7G 12EE18    F51  C~2rXt      
2017 05  19.36670  13 40 11.064  -20 09 18.72  22.0G 12EE18    F51  C~2rXt      

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     0.20
  2   0.0027      0.00     0.12       0.00     0.12
  3   0.0027      0.00    -0.09       0.00    -0.06
  4   0.1830      0.00    -0.14       0.00    -0.06
  5   0.9502      0.00     0.12       0.00    -0.12
  6   0.9503      0.00    -0.12       0.00     0.04
  7   1.0621      0.00    -0.13       0.00     0.10
  8   1.0621      0.00    -0.15       0.00    -0.12
  9   1.0622      0.00     0.03       0.00    -0.08
 10   1.0622      0.00     0.24       0.00    -0.10
 11   2.0888      0.00     0.12       0.00    -0.05
 12   2.0888      0.00    -0.06       0.00    -0.09
 13   2.0889      0.00    -0.02       0.00     0.12
 14   2.0889      0.00     0.83       0.00     0.22
 15   2.7986      0.00     0.03       0.00     0.15
 16   3.0225      0.00     0.20       0.00     0.21
 17   3.0226      0.00     0.04       0.00     0.06
 18   3.0226      0.00     0.18       0.00     0.13
 19   3.0771      0.00    -0.19       0.00    -0.22
 20   3.0772      0.00    -0.15       0.00    -0.07
 21   3.0772      0.00    -0.13       0.00    -0.05
 22   3.0772      0.00    -0.39       0.00     0.13
 23   3.8335      0.00    -0.08       0.00     0.13
 24   3.8335      0.00    -0.15       0.00    -0.18
 25   3.8336      0.00    -0.11       0.00    -0.15
 26   3.8336      0.00     0.02       0.00    -0.03
 27   3.8362      0.00    -0.11       0.00    -0.08
 28   4.2051      0.00    -0.10       0.00    -0.15
 29   4.8410      0.00     0.30       0.00     0.01
 30   4.9256      0.00     0.48       0.00     0.07
 31   4.9256      0.00    -0.12       0.00    -0.04
 32   4.9257      0.00    -0.08       0.00    -0.06
 33   4.9257      0.00    -0.01       0.00    -0.04
 34   4.9283      0.00    -0.08       0.00    -0.08
 35   4.9283      0.00    -0.03       0.00     0.01
 36   4.9283      0.00    -0.03       0.00    -0.17
 37   5.0212      0.00    -0.19       0.00    -0.06
 38   5.0213      0.00    -0.03       0.00    -0.03
 39   5.0213      0.00     0.01       0.00     0.03
 40   5.0213      0.00    -0.01       0.00    -0.09
 41   5.0840      0.00     0.34       0.00    -0.15
 42   5.0840      0.00    -0.23       0.00    -0.16
 43   5.0840      0.00    -0.03       0.00     0.10
 44   5.0841      0.00     0.08       0.00     0.11
 45   5.1851      0.00    -0.26       0.00    -0.09
 46   5.1851      0.00     0.04       0.00    -0.11
 47   5.1852      0.00    -0.21       0.00    -0.13
 48   5.1852      0.00    -0.06       0.00    -0.13
 49   5.8431      0.00     0.08       0.00    -0.01
 50   5.8922      0.00    -0.47       0.00     0.10
 51   5.9224      0.00     0.04       0.00     0.22
 52   5.9225      0.00     0.10       0.00     0.11
 53   5.9225      0.00    -0.03       0.00     0.34
 54   5.9225      0.00    -0.15       0.00     0.47
 55   5.9605      0.00     0.73       0.00     0.17
 56   5.9632      0.00     0.19       0.00    -0.28
 57   5.9852      0.00     0.12       0.00    -0.00
 58   5.9852      0.00    -0.37       0.00     0.00
 59   5.9852      0.00    -0.11       0.00    -0.03
 60   5.9852      0.00    -0.12       0.00    -0.05
 61   6.1299      0.00     0.09       0.00     0.02

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.

12EE18    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        67.795    67.795    67.796
ecceobj         0.438     0.438     0.438
incobj         16.323    16.323    16.323
qmin           36.880    36.932    36.878
qmax          101.695   101.920   101.977
amean          68.470    68.566    68.549
amin           67.569    67.689    67.635
amax           69.635    69.759    69.746
emean           0.446     0.446     0.447
emin            0.432     0.433     0.432
emax            0.460     0.461     0.462
imean          17.151    17.193    17.112
imin           16.481    16.522    16.417
imax           17.856    17.856    17.853
excite_mean     0.534     0.535     0.535
fracstop        1.000     1.000     1.000
cjmean          3.019     3.019     3.019

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       164.3     162.3     160.4
kozaiamp        180.0     180.0     180.0