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 Apr 23 01:37:51 2018
# Orbit generated from Bernstein formalism
# Fitting   27 observations of   28
# Arc:   6.29y
# First observation: 2011/09/05
#  Last observation: 2017/12/20
Preliminary a, adot, b, bdot, g, gdot:
  -0.000104   0.023824   0.000074   0.012316   0.026594   0.000000
# Chi-squared of fit:     5.38 DOF:   48 RMS:  0.08
# Min/Max residuals:    -0.14    0.21
# Exact a, adot, b, bdot, g, gdot:
  1.351654E-05  2.413454E-02  7.195526E-06  1.255786E-02  2.687482E-02  4.004541E-03
# Covariance matrix:
  1.8595E-13 -9.6135E-14  2.1366E-14 -5.7245E-14  1.1164E-13 -7.9877E-13
 -9.6135E-14  2.4549E-13 -5.6047E-14  1.4721E-13  2.6769E-14  2.0136E-12
  2.1366E-14 -5.6047E-14  8.8831E-14 -6.7781E-14 -3.7296E-15 -5.5238E-13
 -5.7245E-14  1.4721E-13 -6.7781E-14  1.4588E-13  8.2833E-15  1.4525E-12
  1.1164E-13  2.6769E-14 -3.7296E-15  8.2833E-15  1.6591E-13  9.2042E-14
 -7.9877E-13  2.0136E-12 -5.5238E-13  1.4525E-12  9.2042E-14  1.9889E-11
#      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:           78.64580 +/-     0.037
Argument of Peri:      275.52268 +/-     0.031
Long of Asc Node:       21.10816 +/-     0.000
Inclination:            27.73008 +/-     0.000
Eccentricity:         0.12777391 +/-    0.0002
Semi-Major Axis:     38.24110942 +/-    0.0040
Time of Perihelion: 2436940.7048 +/-       8.3
Perihelion:          33.35489347 +/-    0.0071
Aphelion:            43.12732537 +/-    0.0076
Period (y)              236.4852 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           33.08112482 +/-    0.0005
Ecliptic Y           18.28679069 +/-    0.0003
Ecliptic Z            2.70531173 +/-    0.0000
Ecliptic XDOT        -0.00096313 +/-    0.0000
Ecliptic YDOT         0.00229058 +/-    0.0000
Ecliptic ZDOT         0.00130566 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.89572859 +/-    0.0004
Geocenter to KBO     37.20954723 +/-    0.0006
# Hcoef:  7.93

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      
2017 12  20.10524  02 03 34.269  +21 38 02.84  23.1R 11UO412   G37  C~2UwX      
2017 12  20.17681  02 03 34.043  +21 38 00.46        11UO412   G37  C~2UwX      

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     0.14       0.00     0.04
  2   0.1362  -3600.88     0.00     483.09     0.05
  3   0.1363  -3605.04    -0.06     483.41    -0.00
  4   0.1365  -3609.16    -0.02     483.75    -0.02
  5   0.1365  -3609.59     0.03     483.81    -0.01
  6   0.1365  -3610.11    -0.06     483.82    -0.03
  7   0.1365  -3610.57    -0.09     484.04     0.15
  8   0.1365  -3611.03    -0.09     483.94     0.01
  9   0.1388  -3679.33    -0.03     489.51     0.04
 10   0.1389  -3683.78    -0.07     489.90     0.04
 11   0.1391  -3687.36    -0.05     490.26     0.09
 12   0.1391  -3688.64     0.03     490.33     0.04
 13   0.1391  -3689.22     0.02     490.46     0.12
 14   0.2181  -5904.21     0.01     632.62    -0.07
 15   0.2241  -6050.58     0.21     639.52    -0.14
 16   0.3880  -7465.52    -0.04     685.09     0.09
 17   0.3907  -7441.44    -0.11     684.77     0.02
 18   0.9500   5652.53    -0.08    2333.69    -0.13
 19   0.9500   5652.42     0.14    2333.92    -0.09
 20   0.9501   5652.06     0.03    2334.08    -0.06
 21   0.9633   5517.17    -0.00    2401.47    -0.08
 22   0.9691   5447.96    -0.03    2430.46    -0.06
 23   1.1165   2017.96     0.03    3030.53    -0.12
 24   1.1250   1763.09    -0.12    3054.22     0.01
 25   1.3601  -2705.86     0.12    3224.45     0.05
 26   1.4146  -2290.43     0.12    3196.80    -0.01
 27   6.2903  22127.03 (   0.45)  15925.28 (   0.94)
 28   6.2905  22123.21    -0.04   15924.06     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  SCATNEAR  SCATEXTD

axisobj        38.301    38.313    38.289
ecceobj         0.129     0.129     0.128
incobj         27.709    27.709    27.708
qmin           32.782    32.667    32.759
qmax           43.627    44.159    43.553
amean          38.080    38.169    38.074
amin           37.780    37.792    37.769
amax           38.406    38.591    38.394
emean           0.114     0.115     0.115
emin            0.093     0.089     0.093
emax            0.137     0.145     0.136
imean          27.413    27.429    27.390
imin           26.611    26.573    26.599
imax           28.132    28.199    28.116
excite_mean     0.474     0.475     0.474
fracstop        1.000     1.000     1.000
cjmean          2.774     2.774     2.774

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     181.0     180.0
kozaiamp        180.0     179.9     179.9