Orbit Fit and Astrometric record for 13EZ27

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: 13EZ27    
# Created Thu Apr 18 01:09:43 2019
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   70 observations of   70
# Arc:   6.08y
# First observation: 2010/05/09
#  Last observation: 2016/06/06
# Chi-squared of fit:    86.86 DOF:  134 RMS:  0.20
# Min/Max residuals:    -0.64    0.58
# Exact a, adot, b, bdot, g, gdot:
  3.265115E-05  1.854205E-01 -7.447370E-06 -4.334078E-02  9.083713E-02 -8.903762E-02
# Covariance matrix:
  1.1084E-12 -2.5220E-13 -3.8072E-14  7.8839E-15 -1.3558E-14  1.3480E-15
 -2.5220E-13  7.3168E-14  8.6246E-15 -4.1313E-15 -1.5323E-15 -1.0092E-15
 -3.8072E-14  8.6246E-15  1.1550E-12 -2.5212E-13  3.8903E-14 -4.1237E-16
  7.8839E-15 -4.1313E-15 -2.5212E-13  7.4132E-14  3.3175E-15  1.1973E-15
 -1.3558E-14 -1.5323E-15  3.8903E-14  3.3175E-15  3.6178E-14  2.0357E-15
  1.3480E-15 -1.0092E-15 -4.1237E-16  1.1973E-15  2.0357E-15  3.4829E-16
#      lat0       lon0       xBary       yBary       zBary        JD0
    6.251424  118.242722   -0.950309   -0.037471    0.341716  2455325.760506
# Heliocentric elements and errors
Epoch:              2455326.5000  =  2010/05/10
Mean Anomaly:          343.26024 +/-     0.000
Argument of Peri:      213.02833 +/-     0.000
Long of Asc Node:      328.90693 +/-     0.000
Inclination:            14.64141 +/-     0.000
Eccentricity:         0.54467509 +/-    0.0000
Semi-Major Axis:     19.45072225 +/-    0.0000
Time of Perihelion: 2456783.4636 +/-       0.0
Perihelion:           8.85639833 +/-    0.0000
Aphelion:            30.04504618 +/-    0.0000
Period (y)               85.7851 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -5.84920676 +/-    0.0000
Ecliptic Y            8.88558855 +/-    0.0000
Ecliptic Z            1.19870148 +/-    0.0000
Ecliptic XDOT        -0.00372650 +/-    0.0000
Ecliptic YDOT        -0.00486337 +/-    0.0000
Ecliptic ZDOT        -0.00159080 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   10.70545278 +/-    0.0000
Geocenter to KBO     11.00892841 +/-    0.0000
# Hcoef: 12.68

The following table shows the complete astrometric record for 13EZ27. 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 (13EZ27) followed by the observatory code and reference code for the source of the astrometry.

2010 05  09.25974  08 07 00.099  +26 37 51.98  23.0G 13EZ27    F51  C~2rXw      
2011 01  27.56504  09 05 41.458  +21 40 02.92  22.2G 13EZ27    F51  C~2rXw      
2011 01  30.49114  09 04 48.442  +21 42 10.24  22.6w 13EZ27    F51  C~1vWw      
2011 01  30.50742  09 04 48.137  +21 42 10.90  22.5w 13EZ27    F51  C~1vWw      
2011 01  30.52250  09 04 47.850  +21 42 11.62  22.5w 13EZ27    F51  C~1vWw      
2012 02  03.54155  09 58 05.797  +13 24 55.99  21.7i 13EZ27    F51  C~1vWw      
2012 02  03.55443  09 58 05.567  +13 24 56.57  21.9i 13EZ27    F51  C~1vWw      
2012 02  03.58741  09 58 04.988  +13 24 58.24  22.1r 13EZ27    F51  C~1vWw      
2012 02  04.51292  09 57 49.076  +13 25 44.39  22.4G 13EZ27    F51  C~2rXw      
2012 02  04.52520  09 57 48.825  +13 25 44.90  22.1G 13EZ27    F51  C~2rXw      
2012 02  04.52659  09 57 48.834  +13 25 45.26  22.5G 13EZ27    F51  C~2rXw      
2012 02  04.59190  09 57 47.658  +13 25 47.97  22.4G 13EZ27    F51  C~2rXw      
2012 02  04.60275  09 57 47.466  +13 25 49.01  21.8G 13EZ27    F51  C~2rXw      
2012 02  15.38050  09 54 36.200  +13 35 01.96  22.3G 13EZ27    F51  C~2rXw      
2012 02  15.39448  09 54 35.942  +13 35 02.70  22.4G 13EZ27    F51  C~2rXw      
2013 02  02.58044  10 55 01.526  +03 16 57.48  22.4G 13EZ27    F51  C~2rXw      
2013 03  05.41133  10 46 26.756  +03 41 43.93  22.0w 13EZ27    F51  C@0613      
2013 03  05.42627  10 46 26.488  +03 41 44.85  22.1w 13EZ27    F51  C@0613      
2013 03  05.44122  10 46 26.214  +03 41 45.72  22.0w 13EZ27    F51  C@0613      
2013 03  05.45617  10 46 25.946  +03 41 46.68  22.1w 13EZ27    F51  C@0613      
2013 03  06.367112 10 46 09.828  +03 42 42.92  21.3R 13EZ27    568  C~0psa      
2013 03  06.368366 10 46 09.804  +03 42 42.94  21.3R 13EZ27    568  C~0psa      
2013 03  06.369625 10 46 09.784  +03 42 43.10  21.3R 13EZ27    568  C~0psa      
2013 03  08.336820 10 45 35.07   +03 44 45.2   21.9R 13EZ27    F65  C~0psa      
2013 03  08.342957 10 45 34.97   +03 44 45.1   21.9R 13EZ27    F65  C~0psa      
2013 03  08.345967 10 45 34.89   +03 44 45.3   21.3R 13EZ27    F65  C~0psa      
2013 03  08.348989 10 45 34.84   +03 44 46.0   21.7R 13EZ27    F65  C~0psa      
2013 04  03.32972  10 38 49.056  +04 09 36.35  21.9G 13EZ27    F51  C~2rXw      
2013 12  14.63431  11 53 16.013  -06 14 10.83  22.7w 13EZ27    F51  C~1vWw      
2013 12  14.63864  11 53 16.062  -06 14 11.46  22.4w 13EZ27    F51  C~1vWw      
2013 12  14.64264  11 53 16.107  -06 14 11.92  22.5w 13EZ27    F51  C~1vWw      
2014 02  21.50975  11 50 09.799  -07 36 51.72  23.2G 13EZ27    F51  C~2rXw      
2014 02  21.52197  11 50 09.644  -07 36 51.51  22.3G 13EZ27    F51  C~2rXw      
2014 02  21.52810  11 50 09.549  -07 36 52.36  21.5G 13EZ27    F51  C~2rXw      
2014 03  24.40427  11 41 25.266  -07 10 24.73  21.8w 13EZ27    F51  C~1vWw      
2014 03  24.41657  11 41 25.054  -07 10 23.84  21.9w 13EZ27    F51  C~1vWw      
2014 03  24.42886  11 41 24.826  -07 10 22.86  22.2w 13EZ27    F51  C~1vWw      
2014 03  24.44118  11 41 24.602  -07 10 22.13  21.9w 13EZ27    F51  C~1vWw      
2014 04  28.30750  11 33 09.144  -06 27 22.01  22.0w 13EZ27    F51  C~1vWw      
2014 04  28.31980  11 33 09.013  -06 27 21.41  22.1w 13EZ27    F51  C~1vWw      
2014 04  28.33207  11 33 08.895  -06 27 20.48  22.1w 13EZ27    F51  C~1vWw      
2014 04  28.34436  11 33 08.758  -06 27 19.77  22.4w 13EZ27    F51  C~1vWw      
2014 05  24.26477  11 31 12.599  -06 10 08.54  22.1w 13EZ27    F51  C~1vWw      
2014 05  24.27805  11 31 12.601  -06 10 08.76  22.1w 13EZ27    F51  C~1vWw      
2014 05  24.29132  11 31 12.597  -06 10 08.28  22.4w 13EZ27    F51  C~1vWw      
2014 05  24.30460  11 31 12.608  -06 10 08.11  22.4w 13EZ27    F51  C~1vWw      
2015 01  26.57192  12 54 53.817  -17 31 28.00  22.6G 13EZ27    F51  C~2rXw      
2015 01  28.57014  12 54 53.641  -17 35 08.86  22.0G 13EZ27    F51  C~2rXw      
2015 01  28.58203  12 54 53.608  -17 35 10.35  22.0G 13EZ27    F51  C~2rXw      
2015 01  28.59391  12 54 53.607  -17 35 11.55  22.8G 13EZ27    F51  C~2rXw      
2015 01  28.60578  12 54 53.601  -17 35 12.83  22.9G 13EZ27    F51  C~2rXw      
2015 01  31.61243  12 54 50.022  -17 40 24.21  22.6G 13EZ27    F51  C~2rXw      
2015 01  31.62346  12 54 49.969  -17 40 25.52  22.4G 13EZ27    F51  C~2rXw      
2015 01  31.63447  12 54 49.979  -17 40 26.54  22.6G 13EZ27    F51  C~2rXw      
2015 01  31.64547  12 54 49.949  -17 40 27.74  22.0G 13EZ27    F51  C~2rXw      
2015 04  14.06337  12 39 06.49   -17 36 26.7   22.4V 13EZ27    W84  C~2Jxu      
2015 04  14.14229  12 39 05.12   -17 36 20.0         13EZ27    W84  C~2Jxu      
2015 04  14.23919  12 39 03.42   -17 36 11.7         13EZ27    W84  C~2Jxu      
2016 02  14.61179  13 56 36.900  -26 16 20.46  22.2G 13EZ27    F51  C~2rXw      
2016 02  14.64629  13 56 36.878  -26 16 23.93  22.6G 13EZ27    F51  C~2rXw      
2016 04  27.36169  13 41 07.916  -26 24 37.59  22.2G 13EZ27    F51  C~2rXw      
2016 04  27.37161  13 41 07.722  -26 24 36.94  23.0G 13EZ27    F51  C~2rXw      
2016 04  27.38146  13 41 07.519  -26 24 35.91  22.4G 13EZ27    F51  C~2rXx      
2016 04  27.39138  13 41 07.373  -26 24 35.37  21.5G 13EZ27    F51  C~2rXx      
2016 05  15.32084  13 36 15.005  -25 56 21.55  22.0G 13EZ27    F51  C~2rXx      
2016 05  15.33050  13 36 14.790  -25 56 20.80  22.2G 13EZ27    F51  C~2rXx      
2016 06  06.26707  13 32 14.747  -25 19 21.63  22.5G 13EZ27    F51  C~2rXx      
2016 06  06.27673  13 32 14.682  -25 19 20.87  22.3G 13EZ27    F51  C~2rXx      
2016 06  06.28640  13 32 14.606  -25 19 19.85  22.9G 13EZ27    F51  C~2rXx      
2016 06  06.29607  13 32 14.532  -25 19 18.80  22.4G 13EZ27    F51  C~2rXx      

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    -0.09       0.00    -0.00
  2   0.7209      0.00    -0.28       0.00    -0.06
  3   0.7289      0.00     0.04       0.00     0.02
  4   0.7289      0.00     0.01       0.00    -0.01
  5   0.7290      0.00    -0.09       0.00     0.08
  6   1.7393      0.00     0.33       0.00     0.02
  7   1.7393      0.00     0.26       0.00    -0.03
  8   1.7394      0.00     0.24       0.00     0.02
  9   1.7420      0.00     0.21       0.00    -0.08
 10   1.7420      0.00    -0.30       0.00    -0.19
 11   1.7420      0.00     0.20       0.00     0.10
 12   1.7422      0.00    -0.16       0.00    -0.41
 13   1.7422      0.00    -0.17       0.00     0.09
 14   1.7717      0.00     0.20       0.00    -0.02
 15   1.7718      0.00     0.20       0.00    -0.01
 16   2.7387      0.00     0.45       0.00     0.24
 17   2.8231      0.00     0.07       0.00     0.05
 18   2.8232      0.00     0.12       0.00     0.05
 19   2.8232      0.00     0.09       0.00     0.00
 20   2.8233      0.00     0.14       0.00     0.04
 21   2.8258      0.00    -0.14       0.00     0.04
 22   2.8258      0.00    -0.16       0.00    -0.02
 23   2.8258      0.00    -0.12       0.00     0.07
 24   2.8311      0.00    -0.41       0.00     0.12
 25   2.8312      0.00    -0.25       0.00    -0.36
 26   2.8312      0.00    -0.64       0.00    -0.35
 27   2.8312      0.00    -0.58       0.00     0.16
 28   2.9023      0.00     0.01       0.00     0.12
 29   3.6013      0.00     0.11       0.00    -0.06
 30   3.6013      0.00     0.14       0.00     0.00
 31   3.6013      0.00     0.17       0.00     0.18
 32   3.7899      0.00    -0.30       0.00     0.58
 33   3.7899      0.00     0.19       0.00     0.53
 34   3.7899      0.00     0.18       0.00    -0.45
 35   3.8745      0.00     0.02       0.00     0.09
 36   3.8745      0.00     0.14       0.00     0.08
 37   3.8745      0.00     0.01       0.00     0.16
 38   3.8746      0.00    -0.05       0.00    -0.01
 39   3.9700      0.00     0.25       0.00    -0.00
 40   3.9700      0.00     0.10       0.00    -0.17
 41   3.9701      0.00     0.14       0.00     0.00
 42   3.9701      0.00    -0.11       0.00    -0.05
 43   4.0411      0.00     0.14       0.00     0.11
 44   4.0411      0.00     0.11       0.00    -0.29
 45   4.0412      0.00    -0.00       0.00     0.00
 46   4.0412      0.00     0.11       0.00    -0.01
 47   4.7182      0.00     0.09       0.00     0.05
 48   4.7236      0.00     0.09       0.00     0.15
 49   4.7237      0.00    -0.24       0.00    -0.05
 50   4.7237      0.00    -0.09       0.00     0.03
 51   4.7237      0.00    -0.01       0.00     0.03
 52   4.7320      0.00     0.01       0.00     0.06
 53   4.7320      0.00    -0.41       0.00    -0.16
 54   4.7320      0.00     0.11       0.00    -0.09
 55   4.7321      0.00     0.04       0.00    -0.20
 56   4.9303      0.00    -0.17       0.00    -0.07
 57   4.9305      0.00     0.01       0.00    -0.06
 58   4.9308      0.00    -0.03       0.00    -0.06
 59   5.7696      0.00    -0.26       0.00    -0.11
 60   5.7697      0.00     0.02       0.00     0.12
 61   5.9688      0.00     0.25       0.00     0.05
 62   5.9688      0.00     0.04       0.00    -0.12
 63   5.9688      0.00    -0.31       0.00     0.09
 64   5.9689      0.00     0.21       0.00    -0.20
 65   6.0180      0.00     0.46       0.00     0.15
 66   6.0180      0.00    -0.62       0.00    -0.08
 67   6.0780      0.00    -0.03       0.00     0.04
 68   6.0781      0.00     0.08       0.00    -0.12
 69   6.0781      0.00     0.03       0.00    -0.02
 70   6.0781      0.00     0.01       0.00     0.10

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.

13EZ27    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        19.565    19.565    19.565
ecceobj         0.544     0.544     0.544
incobj         14.621    14.621    14.621
qmin            8.767     8.401     8.421
qmax           32.070    32.069    32.071
amean          19.279    17.326    18.050
amin           18.615    16.011    16.685
amax           20.485    20.485    20.486
emean           0.540     0.501     0.516
emin            0.525     0.460     0.492
emax            0.566     0.566     0.566
imean          15.795    15.010    15.262
imin           15.670    14.302    14.144
imax           15.876    15.965    17.803
excite_mean     0.605     0.564     0.580
fracstop        0.000     0.002     0.002
cjmean          2.857     3.010     2.951

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       218.5     264.0     265.8
kozaiamp          5.6      49.9      51.9