Orbit Fit and Astrometric record for 11UO412

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: 11UO412   
# Created Mon Oct 23 01:37:59 2017
# Orbit generated from Bernstein formalism
# Fitting   26 observations of   26
# Arc:   1.41y
# First observation: 2011/09/05
#  Last observation: 2013/02/03
Preliminary a, adot, b, bdot, g, gdot:
  -0.000361   0.024273   0.000050   0.012368   0.026521   0.000000
# Chi-squared of fit:     4.59 DOF:   46 RMS:  0.07
# Min/Max residuals:    -0.16    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.367649E-05  2.413493E-02  7.289700E-06  1.255788E-02  2.687523E-02  4.026653E-03
# Covariance matrix:
  8.1578E-13  2.3511E-13 -1.2285E-13  7.5645E-13  1.0686E-12  4.6082E-11
  2.3511E-13  5.3890E-13 -7.9465E-14  4.9984E-13  5.9368E-13  3.0745E-11
 -1.2285E-13 -7.9465E-14  1.4493E-13 -2.8725E-13 -1.9489E-13 -9.4945E-12
  7.5645E-13  4.9984E-13 -2.8725E-13  1.2448E-12  1.2045E-12  5.9444E-11
  1.0686E-12  5.9368E-13 -1.9489E-13  1.2045E-12  1.6539E-12  7.3499E-11
  4.6082E-11  3.0745E-11 -9.4945E-12  5.9444E-11  7.3499E-11  3.6488E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    4.168930   30.060107    0.742684    0.049207   -0.675312  2455810.089596
# Heliocentric elements and errors
Epoch:              2455810.5000  =  2011/09/06
Mean Anomaly:           78.52944 +/-     0.256
Argument of Peri:      275.54789 +/-     0.067
Long of Asc Node:       21.10791 +/-     0.000
Inclination:            27.72939 +/-     0.001
Eccentricity:         0.12857243 +/-    0.0022
Semi-Major Axis:     38.24889235 +/-    0.0207
Time of Perihelion: 2436962.8709 +/-      59.4
Perihelion:          33.33113914 +/-    0.0853
Aphelion:            43.16664556 +/-    0.0866
Period (y)              236.5574 +/-      0.19
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           33.08064093 +/-    0.0016
Ecliptic Y           18.28651751 +/-    0.0009
Ecliptic Z            2.70527474 +/-    0.0001
Ecliptic XDOT        -0.00096119 +/-    0.0000
Ecliptic YDOT         0.00229171 +/-    0.0000
Ecliptic ZDOT         0.00130580 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.89517170 +/-    0.0014
Geocenter to KBO     37.20899036 +/-    0.0018
# Hcoef:  7.95

The following table shows the complete astrometric record for 11UO412. 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 (11UO412) followed by the observatory code and reference code for the source of the astrometry.

2011 09  05.58883  01 45 48.004  +15 23 31.13  23.8r 11UO412   568  C~1C6Q      
2011 10  25.33804  01 41 43.800  +15 09 28.35  23.5r 11UO412   568  C~1C6Q      
2011 10  25.38684  01 41 43.524  +15 09 27.14  23.3r 11UO412   568  C~1C6Q      
2011 10  25.43648  01 41 43.250  +15 09 25.97  23.5r 11UO412   568  C~1C6Q      
2011 10  25.44205  01 41 43.221  +15 09 25.87  23.4r 11UO412   568  C~1C6Q      
2011 10  25.44723  01 41 43.187  +15 09 25.69  23.5r 11UO412   568  C~1C6Q      
2011 10  25.45234  01 41 43.152  +15 09 25.73  23.3r 11UO412   568  C~1C6Q      
2011 10  25.45781  01 41 43.125  +15 09 25.47  23.4r 11UO412   568  C~1C6Q      
2011 10  26.28698  01 41 38.589  +15 09 05.98  23.4r 11UO412   568  C~1C6Q      
2011 10  26.33962  01 41 38.293  +15 09 04.74  23.4r 11UO412   568  C~1C6Q      
2011 10  26.38266  01 41 38.053  +15 09 03.78  23.6r 11UO412   568  C~1C6Q      
2011 10  26.39884  01 41 37.969  +15 09 03.38        11UO412   568  C~1C6Q      
2011 10  26.40555  01 41 37.929  +15 09 03.29  23.4r 11UO412   568  C~1C6Q      
2011 11  24.23661  01 39 11.954  +14 57 52.42  23.7r 11UO412   568  C~1C6Q      
2011 11  26.45630  01 39 02.382  +14 57 05.58  23.6r 11UO412   568  C~1C6Q      
2012 01  25.29229  01 37 30.468  +14 49 11.90  24.3r 11UO412   568  C~1C6Q      
2012 01  26.27710  01 37 32.019  +14 49 20.40  24.0r 11UO412   568  C~1C6Q      
2012 08  17.58141  01 50 57.149  +16 33 14.57  23.6r 11UO412   568  C~1C6Q      
2012 08  17.59430  01 50 57.136  +16 33 14.75  23.8r 11UO412   568  C~1C6Q      
2012 08  17.60362  01 50 57.109  +16 33 14.78  23.5r 11UO412   568  C~1C6Q      
2012 08  22.44017  01 50 46.685  +16 33 30.49  23.6r 11UO412   568  C~1C6Q      
2012 08  24.53923  01 50 41.473  +16 33 33.31  23.7r 11UO412   568  C~1C6Q      
2012 10  17.38671  01 46 43.777  +16 22 41.64  23.4r 11UO412   568  C~1C6Q      
2012 10  20.48174  01 46 26.646  +16 21 33.01  23.4r 11UO412   568  C~1C6Q      
2013 01  14.35013  01 41 32.955  +15 57 27.33  23.7r 11UO412   568  C~1C6Q      
2013 02  03.27546  01 42 00.499  +15 59 31.74  23.8r 11UO412   568  C~1C6Q      

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     0.11       0.00     0.02
  2   0.1362  -3600.88     0.01     483.09     0.03
  3   0.1363  -3605.04    -0.05     483.41    -0.02
  4   0.1365  -3609.16    -0.01     483.75    -0.04
  5   0.1365  -3609.59     0.03     483.81    -0.03
  6   0.1365  -3610.11    -0.05     483.82    -0.05
  7   0.1365  -3610.57    -0.08     484.04     0.13
  8   0.1365  -3611.03    -0.08     483.94    -0.01
  9   0.1388  -3679.33    -0.02     489.51     0.02
 10   0.1389  -3683.78    -0.06     489.90     0.02
 11   0.1391  -3687.36    -0.04     490.26     0.07
 12   0.1391  -3688.64     0.04     490.33     0.02
 13   0.1391  -3689.22     0.03     490.46     0.10
 14   0.2181  -5904.21     0.03     632.62    -0.08
 15   0.2241  -6050.58     0.24     639.52    -0.16
 16   0.3880  -7465.52    -0.03     685.09     0.08
 17   0.3907  -7441.44    -0.10     684.77     0.01
 18   0.9500   5652.53    -0.08    2333.69    -0.11
 19   0.9500   5652.42     0.14    2333.92    -0.06
 20   0.9501   5652.06     0.02    2334.08    -0.03
 21   0.9633   5517.17    -0.01    2401.47    -0.05
 22   0.9691   5447.96    -0.03    2430.46    -0.03
 23   1.1165   2017.96     0.01    3030.53    -0.07
 24   1.1250   1763.09    -0.14    3054.22     0.06
 25   1.3601  -2705.86     0.04    3224.45     0.13
 26   1.4146  -2290.43     0.05    3196.80     0.07

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.

11UO412    quality flag:2

Type:       SCATEXTD  CENTAURS  SCATEXTD

axisobj        38.309    38.372    38.249
ecceobj         0.130     0.135     0.124
incobj         27.708    27.709    27.707
qmin           32.501    28.347    32.809
qmax           43.902    48.485    43.556
amean          38.109    38.192    38.042
amin           37.797    37.843    37.729
amax           38.439    38.611    38.378
emean           0.116     0.196     0.113
emin            0.092     0.118     0.093
emax            0.143     0.256     0.136
imean          27.384    26.056    27.335
imin           26.460    24.147    26.572
imax           28.179    27.763    28.049
excite_mean     0.475     0.483     0.473
fracstop        1.000     1.000     1.000
cjmean          2.774     2.770     2.775

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       181.7     179.7     179.9
kozaiamp        179.8     180.0     180.0