Orbit Fit and Astrometric record for 11EZ90

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: 11EZ90    
# Created Fri Dec  3 02:11:09 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     69 observations of     69
# Arc:   9.91y
# First observation: 2011/03/14
#  Last observation: 2021/02/07
# Chi-squared of fit:    52.28 DOF:    132 RMS:  0.15
# Min/Max residuals:    -0.53    0.42
# Exact a, adot, b, bdot, g, gdot:
  1.871340E-05  2.749046E-02  2.358488E-06  5.810270E-03  2.672889E-02 -4.086290E-04
# Covariance matrix:
  2.0662E-13 -6.4917E-14  1.5362E-14 -8.9336E-15 -3.0925E-14 -1.6375E-13
 -6.4917E-14  2.7282E-14 -8.2906E-15  4.6775E-15  1.2951E-14  8.5308E-14
  1.5362E-14 -8.2906E-15  1.2673E-13 -2.3123E-14  1.8670E-15 -2.9972E-14
 -8.9336E-15  4.6775E-15 -2.3123E-14  5.4497E-15  2.7994E-15  1.7530E-14
 -3.0925E-14  1.2951E-14  1.8670E-15  2.7994E-15  9.7188E-14  6.2922E-14
 -1.6375E-13  8.5308E-14 -2.9972E-14  1.7530E-14  6.2922E-14  3.2161E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   25.616513  150.308836   -0.389596    0.397328   -0.828722  2455634.867346
# Heliocentric elements and errors
Epoch:              2455634.5000  =  2011/03/14
Mean Anomaly:          355.69752 +/-     0.016
Argument of Peri:       71.56370 +/-     0.018
Long of Asc Node:       86.91058 +/-     0.000
Inclination:            27.43665 +/-     0.000
Eccentricity:         0.06733548 +/-    0.0000
Semi-Major Axis:     40.99349265 +/-    0.0020
Time of Perihelion: 2456780.2421 +/-       8.2
Perihelion:          38.23317626 +/-    0.0024
Aphelion:            43.75380904 +/-    0.0026
Period (y)              262.4706 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -30.29373070 +/-    0.0003
Ecliptic Y           16.82582854 +/-    0.0002
Ecliptic Z           16.17530340 +/-    0.0002
Ecliptic XDOT        -0.00113991 +/-    0.0000
Ecliptic YDOT        -0.00258629 +/-    0.0000
Ecliptic ZDOT         0.00051857 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.24211451 +/-    0.0003
Geocenter to KBO     37.41275369 +/-    0.0004
# Hcoef:  6.50

The following table shows the complete astrometric record for 11EZ90. 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 (11EZ90) followed by the observatory code and reference code for the source of the astrometry.

2011 03  14.36658  10 52 26.985  +35 03 10.28  22.2G 11EZ90    F51  C~345U      
2011 03  14.37978  10 52 26.935  +35 03 10.27  22.4G 11EZ90    F51  C~345U      
2011 03  14.39504  10 52 26.864  +35 03 10.23  22.3G 11EZ90    F51  C~345U      
2011 03  14.40699  10 52 26.790  +35 03 10.42  21.5G 11EZ90    F51  C~345U      
2011 05  01.30831  10 48 55.502  +35 01 13.01  22.7G 11EZ90    F51  C~345U      
2012 02  05.40614  11 03 35.535  +34 18 26.27  22.8G 11EZ90    F51  C~345U      
2012 02  12.55366  11 02 58.236  +34 23 49.26  22.0G 11EZ90    F51  C~345U      
2012 02  12.56555  11 02 58.185  +34 23 49.85  22.2G 11EZ90    F51  C~345U      
2014 01  23.63296  11 19 24.375  +33 15 47.96  22.9G 11EZ90    F51  C~345U      
2014 01  25.44891  11 19 17.575  +33 17 21.29  22.9G 11EZ90    F51  C~345U      
2014 01  26.61533  11 19 13.003  +33 18 21.79  22.4G 11EZ90    F51  C~345U      
2014 06  09.35839  11 10 47.919  +33 27 58.09  22.0G 11EZ90    F51  C~345U      
2015 01  14.62731  11 27 12.472  +32 38 58.86  22.2G 11EZ90    F51  C~345U      
2015 01  30.56957  11 26 18.886  +32 52 47.63  22.4G 11EZ90    F51  C~345U      
2015 03  16.47341  11 22 21.489  +33 22 40.94  22.1G 11EZ90    F51  C~345U      
2015 03  16.48398  11 22 21.420  +33 22 41.03  21.8G 11EZ90    F51  C~345U      
2015 03  16.49457  11 22 21.371  +33 22 41.32  22.3G 11EZ90    F51  C~345U      
2015 03  16.50518  11 22 21.294  +33 22 41.49  22.2G 11EZ90    F51  C~345U      
2015 03  17.47888  11 22 15.683  +33 23 04.64  21.7G 11EZ90    F51  C~345U      
2015 03  17.48934  11 22 15.627  +33 23 04.91  22.0G 11EZ90    F51  C~345U      
2015 03  17.49988  11 22 15.560  +33 23 05.03  22.1G 11EZ90    F51  C~345U      
2015 03  17.54130  11 22 15.320  +33 23 06.03  21.9G 11EZ90    F51  C~345U      
2015 05  11.30555  11 18 16.842  +33 20 34.39  22.8G 11EZ90    F51  C~345U      
2015 05  11.31778  11 18 16.817  +33 20 34.18  22.3G 11EZ90    F51  C~345U      
2015 05  11.33000  11 18 16.791  +33 20 33.43  22.0G 11EZ90    F51  C~345U      
2015 05  11.34229  11 18 16.755  +33 20 33.14  23.3G 11EZ90    F51  C~345U      
2016 01  31.47598  11 33 32.713  +32 23 07.57  21.7G 11EZ90    F51  C~345U      
2016 02  11.43341  11 32 44.660  +32 32 12.14  22.1G 11EZ90    F51  C~345U      
2016 02  11.44479  11 32 44.608  +32 32 12.97  22.1G 11EZ90    F51  C~345U      
2016 02  11.45622  11 32 44.571  +32 32 13.56  22.4G 11EZ90    F51  C~345V      
2016 02  11.46760  11 32 44.496  +32 32 14.28  22.2G 11EZ90    F51  C~345V      
2016 02  14.43608  11 32 30.035  +32 34 33.93  22.0G 11EZ90    F51  C~345V      
2016 02  14.44782  11 32 29.980  +32 34 34.41  22.0G 11EZ90    F51  C~345V      
2016 02  14.45956  11 32 29.919  +32 34 34.94  22.2G 11EZ90    F51  C~345V      
2016 02  14.47136  11 32 29.856  +32 34 35.48  22.5G 11EZ90    F51  C~345V      
2016 03  13.34068  11 29 56.363  +32 52 11.46  22.1G 11EZ90    F51  C~345V      
2016 03  13.35170  11 29 56.302  +32 52 11.76  22.0G 11EZ90    F51  C~345V      
2016 03  13.36266  11 29 56.240  +32 52 12.03  21.8G 11EZ90    F51  C~345V      
2016 03  13.37360  11 29 56.174  +32 52 12.35  22.1G 11EZ90    F51  C~345V      
2016 05  03.38920  11 25 51.672  +32 55 19.25  22.4G 11EZ90    F51  C~345V      
2016 05  30.31373  11 25 07.154  +32 41 08.95  22.0G 11EZ90    F51  C~345V      
2016 05  30.32596  11 25 07.142  +32 41 08.40  22.2G 11EZ90    F51  C~345V      
2016 05  30.33820  11 25 07.151  +32 41 07.94  21.9G 11EZ90    F51  C~345V      
2016 05  30.35043  11 25 07.151  +32 41 07.45  22.4G 11EZ90    F51  C~345V      
2017 01  31.47480  11 40 41.238  +31 52 05.02  22.0G 11EZ90    F51  C~345V      
2017 01  31.47544  11 40 41.224  +31 52 05.02  22.3G 11EZ90    F51  C~345V      
2017 01  31.48605  11 40 41.183  +31 52 05.52  21.9G 11EZ90    F51  C~345V      
2017 01  31.48669  11 40 41.182  +31 52 05.30  22.1G 11EZ90    F51  C~345V      
2017 01  31.49723  11 40 41.143  +31 52 05.84  21.8G 11EZ90    F51  C~345V      
2017 01  31.49787  11 40 41.153  +31 52 05.98  22.0G 11EZ90    F51  C~345V      
2017 01  31.50846  11 40 41.085  +31 52 06.44  22.1G 11EZ90    F51  C~345V      
2017 01  31.50911  11 40 41.102  +31 52 06.42  22.1G 11EZ90    F51  C~345V      
2017 02  17.57679  11 39 24.522  +32 06 01.37  22.0G 11EZ90    F51  C~345V      
2017 02  17.58842  11 39 24.447  +32 06 01.91  22.2G 11EZ90    F51  C~345V      
2017 02  17.60003  11 39 24.407  +32 06 02.53  22.0G 11EZ90    F51  C~345V      
2017 02  17.61167  11 39 24.348  +32 06 02.63  21.7G 11EZ90    F51  C~345V      
2017 02  20.63210  11 39 08.856  +32 08 17.71  22.3G 11EZ90    F51  C~345V      
2017 02  23.43527  11 38 54.104  +32 10 18.53  22.2G 11EZ90    F51  C~345V      
2017 03  06.42727  11 37 53.448  +32 17 22.47  22.3G 11EZ90    F51  C~345V      
2017 03  18.34418  11 36 45.368  +32 23 18.90  22.1G 11EZ90    F51  C~345V      
2017 03  18.35511  11 36 45.307  +32 23 19.33  22.1G 11EZ90    F51  C~345V      
2017 03  18.36609  11 36 45.242  +32 23 19.53  22.2G 11EZ90    F51  C~345V      
2017 03  18.37715  11 36 45.182  +32 23 19.93  22.2G 11EZ90    F51  C~345V      
2017 04  11.45424  11 34 35.119  +32 28 48.30  21.9G 11EZ90    F51  C~345V      
2018 03  06.37616  11 45 05.711  +31 44 34.75  22.7G 11EZ90    F51  C~345V      
2021 02  07.63331  12 08 06.225  +29 38 07.17  22.1w 11EZ90    F51  C~4Z3F      
2021 02  07.64024  12 08 06.191  +29 38 07.42  22.1w 11EZ90    F51  C~4Z3F      
2021 02  07.64722  12 08 06.179  +29 38 07.82  22.1w 11EZ90    F51  C~4Z3F      
2021 02  07.65416  12 08 06.142  +29 38 08.03  22.1w 11EZ90    F51  C~4Z3F      

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    -0.44       0.00     0.42
     2   0.0000      0.00    -0.02       0.00     0.14
     3   0.0001      0.00     0.26       0.00    -0.20
     4   0.0001      0.00     0.21       0.00    -0.24
     5   0.1313      0.00    -0.09       0.00     0.08
     6   0.8981      0.00     0.38       0.00    -0.06
     7   0.9177      0.00    -0.09       0.00    -0.05
     8   0.9177      0.00     0.13       0.00     0.03
     9   2.8645      0.00    -0.46       0.00    -0.22
    10   2.8695      0.00     0.04       0.00    -0.53
    11   2.8727      0.00     0.06       0.00     0.07
    12   3.2389      0.00    -0.10       0.00     0.33
    13   3.8392      0.00     0.02       0.00    -0.04
    14   3.8828      0.00    -0.27       0.00    -0.18
    15   4.0058      0.00     0.11       0.00     0.14
    16   4.0058      0.00     0.00       0.00    -0.02
    17   4.0058      0.00     0.20       0.00     0.02
    18   4.0059      0.00    -0.02       0.00    -0.06
    19   4.0085      0.00    -0.03       0.00     0.12
    20   4.0085      0.00     0.05       0.00     0.15
    21   4.0086      0.00    -0.03       0.00     0.03
    22   4.0087      0.00     0.00       0.00     0.09
    23   4.1586      0.00    -0.05       0.00     0.03
    24   4.1587      0.00    -0.01       0.00     0.17
    25   4.1587      0.00     0.01       0.00    -0.24
    26   4.1587      0.00    -0.12       0.00    -0.18
    27   4.8846      0.00    -0.03       0.00     0.17
    28   4.9146      0.00    -0.15       0.00    -0.17
    29   4.9147      0.00    -0.10       0.00     0.11
    30   4.9147      0.00     0.18       0.00     0.15
    31   4.9147      0.00    -0.11       0.00     0.32
    32   4.9228      0.00    -0.03       0.00     0.07
    33   4.9229      0.00     0.04       0.00    -0.00
    34   4.9229      0.00     0.02       0.00    -0.02
    35   4.9229      0.00    -0.03       0.00    -0.03
    36   4.9992      0.00    -0.03       0.00    -0.01
    37   4.9993      0.00     0.03       0.00    -0.02
    38   4.9993      0.00     0.06       0.00    -0.06
    39   4.9993      0.00     0.03       0.00    -0.04
    40   5.1390      0.00    -0.03       0.00     0.03
    41   5.2127      0.00     0.00       0.00     0.01
    42   5.2128      0.00    -0.12       0.00    -0.03
    43   5.2128      0.00     0.07       0.00     0.03
    44   5.2128      0.00     0.12       0.00     0.05
    45   5.8867      0.00     0.06       0.00     0.27
    46   5.8867      0.00    -0.11       0.00     0.24
    47   5.8867      0.00    -0.10       0.00     0.19
    48   5.8867      0.00    -0.08       0.00    -0.07
    49   5.8867      0.00    -0.04       0.00    -0.07
    50   5.8867      0.00     0.15       0.00     0.03
    51   5.8868      0.00    -0.25       0.00    -0.05
    52   5.8868      0.00     0.05       0.00    -0.11
    53   5.9335      0.00     0.07       0.00     0.01
    54   5.9335      0.00    -0.16       0.00     0.02
    55   5.9336      0.00     0.13       0.00     0.12
    56   5.9336      0.00     0.15       0.00    -0.31
    57   5.9419      0.00     0.01       0.00    -0.05
    58   5.9495      0.00    -0.06       0.00     0.12
    59   5.9796      0.00     0.11       0.00    -0.07
    60   6.0123      0.00    -0.03       0.00    -0.09
    61   6.0123      0.00     0.01       0.00     0.06
    62   6.0123      0.00    -0.01       0.00    -0.02
    63   6.0123      0.00     0.05       0.00     0.11
    64   6.0783      0.00    -0.32       0.00    -0.43
    65   6.9788      0.00     0.40       0.00    -0.12
    66   9.9063      0.00     0.00       0.00     0.09
    67   9.9063      0.00    -0.11       0.00    -0.01
    68   9.9063      0.00     0.11       0.00     0.03
    69   9.9063      0.00    -0.05       0.00    -0.11

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.

11EZ90    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        41.081    41.081    41.081
ecceobj         0.068     0.068     0.068
incobj         27.410    27.410    27.410
qmin           37.411    37.476    37.485
qmax           45.126    45.246    45.211
amean          41.196    41.193    41.188
amin           40.811    40.812    40.817
amax           41.574    41.571    41.562
emean           0.067     0.067     0.066
emin            0.050     0.050     0.049
emax            0.087     0.089     0.088
imean          25.863    25.868    25.872
imin           25.471    25.477    25.470
imax           26.289    26.297    26.302
excite_mean     0.441     0.441     0.441
fracstop        1.000     1.000     1.000
cjmean          2.831     2.831     2.831

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       179.4     179.2     179.4
kozaiamp        179.9     180.0     179.9