Orbit Fit and Astrometric record for 11UD412

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: 11UD412   
# Created Sun Oct 21 01:09:02 2018
# Orbit generated from Bernstein formalism
# Fitting   25 observations of   25
# Arc:   4.11y
# First observation: 2011/08/29
#  Last observation: 2015/10/09
Preliminary a, adot, b, bdot, g, gdot:
  -0.000181   0.021968  -0.000011   0.001755   0.022678   0.000000
# Chi-squared of fit:     9.76 DOF:   44 RMS:  0.11
# Min/Max residuals:    -0.20    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.463324E-05  2.168680E-02  1.026483E-07  1.727459E-03  2.281145E-02 -6.180634E-04
# Covariance matrix:
  2.2058E-13 -1.0944E-13  2.8410E-15 -6.8264E-15  9.8392E-14 -8.3698E-13
 -1.0944E-13  2.8113E-13 -9.8864E-15  2.4465E-14  6.9334E-14  3.3249E-12
  2.8410E-15 -9.8864E-15  1.0407E-13 -4.0595E-14 -2.7334E-15 -1.3335E-13
 -6.8264E-15  2.4465E-14 -4.0595E-14  3.7139E-14  7.0117E-15  3.3021E-13
  9.8392E-14  6.9334E-14 -2.7334E-15  7.0117E-15  1.6297E-13  1.0633E-12
 -8.3698E-13  3.3249E-12 -1.3335E-13  3.3021E-13  1.0633E-12  4.4976E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.027835   32.312851    0.842156    0.029127   -0.551240  2455803.024546
# Heliocentric elements and errors
Epoch:              2455800.5000  =  2011/08/27
Mean Anomaly:          304.01344 +/-     0.161
Argument of Peri:       94.47812 +/-     0.197
Long of Asc Node:      358.29245 +/-     0.003
Inclination:             5.48722 +/-     0.000
Eccentricity:         0.05523565 +/-    0.0003
Semi-Major Axis:     45.71283599 +/-    0.0033
Time of Perihelion: 2473356.9588 +/-      50.4
Perihelion:          43.18785766 +/-    0.0123
Aphelion:            48.23781432 +/-    0.0124
Period (y)              309.0761 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           37.91736093 +/-    0.0007
Ecliptic Y           22.98491767 +/-    0.0004
Ecliptic Z            2.31557901 +/-    0.0000
Ecliptic XDOT        -0.00146635 +/-    0.0000
Ecliptic YDOT         0.00215975 +/-    0.0000
Ecliptic ZDOT         0.00020318 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.40038971 +/-    0.0006
Geocenter to KBO     43.83763956 +/-    0.0008
# Hcoef:  7.01

The following table shows the complete astrometric record for 11UD412. 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 (11UD412) followed by the observatory code and reference code for the source of the astrometry.

2011 08  29.52378  01 56 11.475  +15 07 01.88  23.6r 11UD412   568  C~1C6P      
2011 08  29.56781  01 56 11.377  +15 07 01.47  23.5r 11UD412   568  C~1C6P      
2011 08  29.61470  01 56 11.255  +15 07 01.12  23.4r 11UD412   568  C~1C6P      
2011 09  05.55403  01 55 54.028  +15 06 00.46  23.2r 11UD412   568  C~1C6P      
2011 10  24.43329  01 52 42.820  +14 51 08.14  23.2r 11UD412   568  C~1C6P      
2011 10  24.47598  01 52 42.620  +14 51 07.10  23.2r 11UD412   568  C~1C6P      
2011 10  24.51878  01 52 42.424  +14 51 06.09  23.0r 11UD412   568  C~1C6P      
2011 10  31.53810  01 52 10.711  +14 48 19.05  23.3r 11UD412   568  C~1C6P      
2011 11  24.28350  01 50 31.496  +14 39 06.03  23.3r 11UD412   568  C~1C6P      
2012 01  25.27722  01 49 00.350  +14 27 48.01  23.4r 11UD412   568  C~1C6P      
2012 01  26.26197  01 49 01.590  +14 27 51.30  23.3r 11UD412   568  C~1C6P      
2012 01  27.31913  01 49 02.971  +14 27 55.23  23.6r 11UD412   568  C~1C6P      
2012 01  27.33942  01 49 03.009  +14 27 55.26  23.7r 11UD412   568  C~1C6P      
2012 08  17.56862  02 01 13.158  +15 39 11.41  23.5r 11UD412   568  C~1C6P      
2012 08  24.52636  02 01 02.459  +15 38 50.84  23.3r 11UD412   568  C~1C6P      
2012 10  17.37393  01 57 55.913  +15 25 33.54  23.2r 11UD412   568  C~1C6P      
2012 10  20.46885  01 57 41.878  +15 24 23.54  23.2r 11UD412   568  C~1C6P      
2013 02  02.26555  01 53 49.765  +14 59 58.32  23.7r 11UD412   568  C~1C6P      
2013 02  03.26646  01 53 51.687  +15 00 05.15        11UD412   568  C~1C6P      
2013 09  30.48442  02 03 56.30   +16 02 58.0         11UD412   568  C~1CKy      
2013 09  30.56006  02 03 55.99   +16 02 56.6         11UD412   568  C~1CKy      
2013 09  30.63607  02 03 55.68   +16 02 55.2         11UD412   568  C~1CKy      
2015 10  09.41854  02 12 58.696  +17 02 18.61  23.4w 11UD412   568  C~2jM3      
2015 10  09.46193  02 12 58.508  +17 02 17.70  23.5w 11UD412   568  C~2jM3      
2015 10  09.49526  02 12 58.358  +17 02 17.10  23.3w 11UD412   568  C~2jM3      

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     0.08       0.00     0.23
  2   0.0001     -1.47     0.10       0.11     0.12
  3   0.0002     -3.25    -0.09       0.40     0.18
  4   0.0192   -258.23    -0.05      30.45     0.11
  5   0.1531  -3166.20     0.09     165.03    -0.17
  6   0.1532  -3169.29     0.03     165.08    -0.19
  7   0.1533  -3172.30     0.05     165.13    -0.19
  8   0.1725  -3661.66     0.02     170.75    -0.09
  9   0.2375  -5204.26    -0.03     161.96    -0.09
 10   0.4073  -6683.29    -0.02      -2.27    -0.02
 11   0.4100  -6665.26     0.20      -5.61    -0.09
 12   0.4129  -6645.10    -0.19      -9.07    -0.05
 13   0.4129  -6644.57    -0.06      -9.24    -0.15
 14   0.9693   4761.88    -0.08     303.24     0.25
 15   0.9884   4609.58    -0.20     336.91     0.11
 16   1.1358   1803.31     0.01     517.63    -0.09
 17   1.1443   1588.66    -0.05     522.28     0.06
 18   1.4312  -2071.32    -0.06     320.53     0.15
 19   1.4339  -2042.84     0.00     317.16     0.13
 20   2.0889   7463.90     0.08     841.26    -0.01
 21   2.0891   7459.21     0.09     841.46    -0.05
 22   2.0893   7454.53     0.12     841.66    -0.08
 23   4.1120  16033.82    -0.01    1590.97     0.03
 24   4.1121  16030.96    -0.00    1591.00    -0.06
 25   4.1122  16028.72    -0.04    1591.14    -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.

11UD412    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        45.811    45.821    45.801
ecceobj         0.056     0.055     0.056
incobj          5.483     5.483     5.483
qmin           42.214    42.225    42.196
qmax           48.962    48.948    48.953
amean          45.479    45.477    45.460
amin           45.117    45.110    45.104
amax           45.859    45.862    45.835
emean           0.056     0.056     0.056
emin            0.044     0.043     0.043
emax            0.068     0.068     0.068
imean           5.905     5.907     5.903
imin            5.501     5.509     5.496
imax            6.316     6.312     6.315
excite_mean     0.117     0.117     0.117
fracstop        1.000     1.000     1.000
cjmean          3.103     3.103     3.103

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       177.8     178.2     177.6
kozaiamp        180.0     180.0     180.0