Orbit Fit and Astrometric record for 11JA32

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: 11JA32    
# Created Mon Dec 10 02:09:14 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   25 observations of   25
# Arc:   5.10y
# First observation: 2011/05/02
#  Last observation: 2016/06/05
# Chi-squared of fit:     6.96 DOF:   44 RMS:  0.09
# Min/Max residuals:    -0.25    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.573770E-05  2.295547E-02  4.064176E-07  9.618363E-04  2.337002E-02 -2.179673E-03
# Covariance matrix:
  8.7265E-14 -5.1561E-14  2.5764E-16 -1.5462E-15  4.8622E-16 -3.3105E-13
 -5.1561E-14  4.4014E-13 -3.2631E-15  1.3020E-14  8.2939E-13  3.4818E-12
  2.5764E-16 -3.2631E-15  8.1762E-14 -2.2359E-14 -5.9599E-15 -2.7844E-14
 -1.5462E-15  1.3020E-14 -2.2359E-14  2.1435E-14  1.5073E-14  1.2415E-13
  4.8622E-16  8.2939E-13 -5.9599E-15  1.5073E-14  2.6234E-12  5.4158E-12
 -3.3105E-13  3.4818E-12 -2.7844E-14  1.2415E-13  5.4158E-12  3.1124E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.125193  -82.333299    0.842216    0.020699   -0.558532  2455683.784186
# Heliocentric elements and errors
Epoch:              2455684.5000  =  2011/05/03
Mean Anomaly:          308.05464 +/-     0.047
Argument of Peri:      106.07087 +/-     0.063
Long of Asc Node:      236.00109 +/-     0.004
Inclination:             3.22376 +/-     0.000
Eccentricity:         0.13553617 +/-    0.0003
Semi-Major Axis:     46.65394891 +/-    0.0135
Time of Perihelion: 2472479.3189 +/-      45.8
Perihelion:          40.33065150 +/-    0.0176
Aphelion:            52.97724632 +/-    0.0202
Period (y)              318.6697 +/-      0.14
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            4.94923399 +/-    0.0004
Ecliptic Y          -43.04436891 +/-    0.0029
Ecliptic Z            1.58681203 +/-    0.0001
Ecliptic XDOT         0.00262871 +/-    0.0000
Ecliptic YDOT         0.00062175 +/-    0.0000
Ecliptic ZDOT         0.00010317 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.35709031 +/-    0.0029
Geocenter to KBO     42.78996582 +/-    0.0030
# Hcoef:  9.75

The following table shows the complete astrometric record for 11JA32. 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 (11JA32) followed by the observatory code and reference code for the source of the astrometry.

2011 05  02.28342  18 32 51.70   -21 05 44.6         11JA32    268  C~0pNL      
2011 05  02.28856  18 32 51.69   -21 05 44.6         11JA32    268  C~0pNL      
2011 05  02.30851  18 32 51.65   -21 05 44.5         11JA32    268  C~0pNL      
2011 05  02.32221  18 32 51.62   -21 05 44.6         11JA32    268  C~0pNL      
2011 05  02.33338  18 32 51.59   -21 05 44.4         11JA32    268  C~0pNL      
2011 05  02.35124  18 32 51.54   -21 05 44.5         11JA32    268  C~0pNL      
2011 05  02.35411  18 32 51.53   -21 05 44.5         11JA32    268  C~0pNL      
2011 05  03.28524  18 32 49.38   -21 05 43.5         11JA32    268  C~0pNL      
2011 05  03.29159  18 32 49.37   -21 05 43.5         11JA32    268  C~0pNL      
2011 05  03.30873  18 32 49.34   -21 05 43.4         11JA32    268  C~0pNL      
2011 05  03.32834  18 32 49.28   -21 05 43.3         11JA32    268  C~0pNL      
2011 05  03.34419  18 32 49.24   -21 05 43.3         11JA32    268  C~0pNL      
2011 05  03.36010  18 32 49.20   -21 05 43.3         11JA32    268  C~0pNL      
2011 05  03.36568  18 32 49.18   -21 05 43.4         11JA32    268  C~0pNL      
2011 05  27.25954  18 31 31.26   -21 05 40.4         11JA32    268  C~0pNL      
2011 05  28.29575  18 31 27.04   -21 05 41.2   25.8R 11JA32    268  C~0pNL      
2012 04  21.32330  18 38 46.31   -20 57 52.9         11JA32    268  C~0pNL      
2012 04  21.37086  18 38 46.23   -20 57 52.8         11JA32    268  C~0pNL      
2012 04  21.40842  18 38 46.18   -20 57 52.7         11JA32    268  C~0pNL      
2014 06  25.39079  18 46 20.342  -20 40 57.45        11JA32    266  C~2Gt7      
2014 06  25.45257  18 46 20.032  -20 40 57.78        11JA32    266  C~2Gt7      
2014 06  25.50827  18 46 19.760  -20 40 57.94        11JA32    266  C~2Gt7      
2014 06  25.54018  18 46 19.591  -20 40 58.01        11JA32    266  C~2Gt7      
2016 06  05.50446  18 59 18.002  -20 18 31.86        11JA32    266  C~2Gt7      
2016 06  05.54180  18 59 17.850  -20 18 31.87        11JA32    266  C~2Gt7      

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    -0.05       0.00     0.05
  2   0.0000      0.00    -0.02       0.00     0.04
  3   0.0001      0.00     0.09       0.00     0.12
  4   0.0001      0.00     0.12       0.00     0.00
  5   0.0001      0.00     0.07       0.00     0.19
  6   0.0002      0.00    -0.05       0.00     0.07
  7   0.0002      0.00    -0.10       0.00     0.06
  8   0.0027      0.00    -0.02       0.00    -0.10
  9   0.0028      0.00     0.06       0.00    -0.11
 10   0.0028      0.00     0.24       0.00    -0.03
 11   0.0029      0.00     0.06       0.00     0.05
 12   0.0029      0.00     0.04       0.00     0.03
 13   0.0029      0.00     0.02       0.00     0.01
 14   0.0030      0.00    -0.07       0.00    -0.09
 15   0.0684      0.00    -0.11       0.00    -0.25
 16   0.0712      0.00    -0.13       0.00    -0.09
 17   0.9720      0.00     0.12       0.00    -0.02
 18   0.9722      0.00    -0.14       0.00    -0.03
 19   0.9723      0.00    -0.14       0.00    -0.01
 20   3.1488      0.00     0.02       0.00     0.02
 21   3.1490      0.00     0.01       0.00    -0.02
 22   3.1491      0.00     0.11       0.00     0.07
 23   3.1492      0.00    -0.03       0.00     0.14
 24   5.0957      0.00    -0.07       0.00    -0.12
 25   5.0958      0.00     0.06       0.00     0.01

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.

11JA32    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        46.453    46.453    46.453
ecceobj         0.135     0.135     0.135
incobj          3.230     3.230     3.230
qmin           39.678    39.666    39.656
qmax           54.027    54.041    53.972
amean          46.664    46.664    46.664
amin           46.269    46.265    46.271
amax           47.119    47.108    47.113
emean           0.134     0.134     0.134
emin            0.121     0.121     0.121
emax            0.147     0.147     0.147
imean           4.759     4.759     4.759
imin            4.293     4.294     4.293
imax            5.209     5.206     5.207
excite_mean     0.158     0.158     0.158
fracstop        1.000     1.000     1.000
cjmean          3.104     3.104     3.104

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       180.6     180.8     180.3
kozaiamp        180.0     180.0     180.0