Orbit Fit and Astrometric record for 11UA412

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: 11UA412   
# Created Fri Oct 20 01:38:01 2017
# Orbit generated from Bernstein formalism
# Fitting   12 observations of   12
# Arc:   1.15y
# First observation: 2011/08/29
#  Last observation: 2012/10/21
Preliminary a, adot, b, bdot, g, gdot:
  -0.000081   0.027666   0.000002  -0.001046   0.025780   0.000000
# Chi-squared of fit:     4.98 DOF:   18 RMS:  0.11
# Min/Max residuals:    -0.21    0.27
# Exact a, adot, b, bdot, g, gdot:
  1.733733E-05  2.749831E-02  2.621273E-07 -1.039805E-03  2.570076E-02 -1.028713E-04
# Covariance matrix:
  5.2300E-13  6.2137E-13 -2.8111E-15 -4.2607E-14  8.7023E-13  4.2194E-11
  6.2137E-13  5.9116E-12 -2.1895E-15 -2.7026E-13  3.5635E-12  2.7000E-10
 -2.8111E-15 -2.1895E-15  2.4716E-13 -2.4977E-13 -6.8219E-15 -8.6810E-14
 -4.2607E-14 -2.7026E-13 -2.4977E-13  5.0818E-13 -1.7590E-13 -1.3478E-11
  8.7023E-13  3.5635E-12 -6.8219E-15 -1.7590E-13  2.9944E-12  1.7492E-10
  4.2194E-11  2.7000E-10 -8.6810E-14 -1.3478E-11  1.7492E-10  1.3469E-08
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.087850   29.693301    0.816181    0.021454   -0.589356  2455803.011756
# Heliocentric elements and errors
Epoch:              2455800.5000  =  2011/08/27
Mean Anomaly:          352.38126 +/-     1.286
Argument of Peri:      146.32551 +/-     1.787
Long of Asc Node:      252.64069 +/-     0.020
Inclination:             2.95147 +/-     0.001
Eccentricity:         0.15419906 +/-    0.0007
Semi-Major Axis:     46.60953847 +/-    0.0096
Time of Perihelion: 2458260.2513 +/-     415.3
Perihelion:          39.42239131 +/-    0.0337
Aphelion:            53.79668563 +/-    0.0346
Period (y)              318.2148 +/-      0.10
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           34.69767851 +/-    0.0023
Ecliptic Y           18.84564391 +/-    0.0013
Ecliptic Z            1.41757103 +/-    0.0001
Ecliptic XDOT        -0.00146023 +/-    0.0000
Ecliptic YDOT         0.00254666 +/-    0.0000
Ecliptic ZDOT        -0.00011103 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.51071622 +/-    0.0021
Geocenter to KBO     38.90935093 +/-    0.0026
# Hcoef:  8.75

The following table shows the complete astrometric record for 11UA412. 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 (11UA412) followed by the observatory code and reference code for the source of the astrometry.

2011 08  29.51099  01 47 26.789  +13 19 00.77  24.8r 11UA412   568  C~1C6P      
2011 08  29.55464  01 47 26.681  +13 19 00.40  24.3r 11UA412   568  C~1C6P      
2011 09  05.54123  01 47 07.177  +13 17 26.66  24.3r 11UA412   568  C~1C6P      
2011 10  24.42047  01 43 37.223  +12 58 28.49        11UA412   568  C~1C6P      
2011 10  24.46320  01 43 37.006  +12 58 27.32  24.7r 11UA412   568  C~1C6P      
2011 10  24.50589  01 43 36.790  +12 58 26.12        11UA412   568  C~1C6P      
2011 10  29.32439  01 43 13.339  +12 56 10.12  24.4r 11UA412   568  C~1C6P      
2012 08  23.56668  01 53 48.159  +13 49 52.25        11UA412   568  C~1C6P      
2012 08  24.59051  01 53 46.126  +13 49 43.64        11UA412   568  C~1C6P      
2012 10  21.31891  01 50 01.712  +13 30 15.09  24.5r 11UA412   568  C~1C6P      
2012 10  21.34463  01 50 01.590  +13 30 14.22  24.8r 11UA412   568  C~1C6P      
2012 10  21.37029  01 50 01.443  +13 30 13.57  24.4r 11UA412   568  C~1C6P      

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    -0.19
  2   0.0001     -1.61     0.04       0.21    -0.08
  3   0.0192   -301.04     0.04      13.73    -0.09
  4   0.1531  -3572.57     0.05      45.56     0.02
  5   0.1532  -3575.95     0.01      45.60     0.08
  6   0.1533  -3579.33    -0.04      45.61     0.10
  7   0.1665  -3948.23    -0.01      41.68     0.27
  8   0.9858   5858.12    -0.13    -224.88    -0.21
  9   0.9886   5827.34     0.13    -222.61    -0.12
 10   1.1466   2352.94     0.06    -169.25     0.15
 11   1.1467   2350.97     0.09    -169.43    -0.04
 12   1.1468   2348.73    -0.14    -169.28     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.

11UA412    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        46.712    46.739    46.687
ecceobj         0.156     0.156     0.156
incobj          2.951     2.950     2.951
qmin           38.543    38.636    38.534
qmax           54.511    54.376    54.398
amean          46.307    46.336    46.280
amin           45.917    45.924    45.884
amax           46.771    46.765    46.726
emean           0.152     0.151     0.151
emin            0.138     0.138     0.138
emax            0.166     0.163     0.165
imean           4.594     4.620     4.594
imin            3.998     4.059     3.995
imax            5.132     5.126     5.133
excite_mean     0.171     0.171     0.171
fracstop        1.000     1.000     1.000
cjmean          3.093     3.094     3.093

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       183.8     182.1     183.7
kozaiamp        180.0     180.0     180.0