Orbit Fit and Astrometric record for 11UN411

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: 11UN411   
# Created Sat Oct 21 01:37:57 2017
# Orbit generated from Bernstein formalism
# Fitting   23 observations of   23
# Arc:   1.44y
# First observation: 2011/08/30
#  Last observation: 2013/02/06
Preliminary a, adot, b, bdot, g, gdot:
  -0.000337   0.036571   0.000011   0.000816   0.030183   0.000000
# Chi-squared of fit:    10.71 DOF:   40 RMS:  0.12
# Min/Max residuals:    -0.34    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.917247E-05  3.633715E-02  4.531194E-07  8.202757E-04  3.041434E-02  1.347816E-03
# Covariance matrix:
  6.1214E-13  6.9552E-13 -1.5903E-14  4.7062E-14  8.8623E-13  3.6697E-11
  6.9552E-13  2.6460E-12 -3.5226E-14  1.1706E-13  1.8988E-12  9.6601E-11
 -1.5903E-14 -3.5226E-14  1.4935E-13 -1.6248E-13 -3.2420E-14 -1.4803E-12
  4.7062E-14  1.1706E-13 -1.6248E-13  3.0840E-13  1.0034E-13  4.8653E-12
  8.8623E-13  1.8988E-12 -3.2420E-14  1.0034E-13  1.7846E-12  8.0065E-11
  3.6697E-11  9.6601E-11 -1.4803E-12  4.8653E-12  8.0065E-11  3.9949E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.981372   32.856893    0.837777    0.029001   -0.557402  2455804.028486
# Heliocentric elements and errors
Epoch:              2455800.5000  =  2011/08/27
Mean Anomaly:            2.41391 +/-     0.348
Argument of Peri:       61.16725 +/-     0.556
Long of Asc Node:      326.42637 +/-     0.014
Inclination:             3.23300 +/-     0.000
Eccentricity:         0.21673121 +/-    0.0002
Semi-Major Axis:     42.68921413 +/-    0.0059
Time of Perihelion: 2455117.3848 +/-      98.5
Perihelion:          33.43712913 +/-    0.0101
Aphelion:            51.94129913 +/-    0.0114
Period (y)              278.9237 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           28.50885436 +/-    0.0012
Ecliptic Y           17.41454345 +/-    0.0008
Ecliptic Z            1.71012709 +/-    0.0001
Ecliptic XDOT        -0.00167927 +/-    0.0000
Ecliptic YDOT         0.00281679 +/-    0.0000
Ecliptic ZDOT         0.00008011 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.45064477 +/-    0.0011
Geocenter to KBO     32.87923110 +/-    0.0014
# Hcoef:  9.29

The following table shows the complete astrometric record for 11UN411. 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 (11UN411) followed by the observatory code and reference code for the source of the astrometry.

2011 08  30.52772  01 58 22.189  +15 15 44.29  24.5r 11UN411   568  C~1C6O      
2011 08  30.57409  01 58 22.052  +15 15 43.79  24.0r 11UN411   568  C~1C6O      
2011 10  25.32517  01 53 58.742  +14 55 05.26        11UN411   568  C~1C6O      
2011 10  25.36849  01 53 58.472  +14 55 04.02  24.3r 11UN411   568  C~1C6O      
2011 10  25.42298  01 53 58.156  +14 55 02.25  24.1r 11UN411   568  C~1C6O      
2011 10  25.48274  01 53 57.795  +14 55 00.60  24.2r 11UN411   568  C~1C6O      
2011 10  26.27399  01 53 53.261  +14 54 36.24  24.5r 11UN411   568  C~1C6O      
2011 10  26.32667  01 53 52.953  +14 54 34.38  24.2r 11UN411   568  C~1C6O      
2011 10  26.36985  01 53 52.701  +14 54 32.94  24.0r 11UN411   568  C~1C6O      
2011 10  31.54242  01 53 22.961  +14 51 52.29  24.5r 11UN411   568  C~1C6O      
2011 11  24.28350  01 51 17.109  +14 39 52.10        11UN411   568  C~1C6O      
2011 11  30.32972  01 50 50.039  +14 37 06.52        11UN411   568  C~1C6O      
2012 01  26.26197  01 49 34.599  +14 25 41.63  24.3r 11UN411   568  C~1C6O      
2012 01  27.33942  01 49 36.783  +14 25 47.86  24.5r 11UN411   568  C~1C6O      
2012 08  17.55584  02 06 49.153  +16 01 57.30  24.8r 11UN411   568  C~1C6O      
2012 08  22.61130  02 06 41.563  +16 01 47.94  24.7r 11UN411   568  C~1C6O      
2012 08  23.52913  02 06 39.919  +16 01 44.50  24.9r 11UN411   568  C~1C6O      
2012 08  24.48353  02 06 38.091  +16 01 40.63        11UN411   568  C~1C6O      
2012 08  24.56487  02 06 37.913  +16 01 40.23        11UN411   568  C~1C6O      
2012 10  21.32322  02 02 26.546  +15 43 19.83  24.3r 11UN411   568  C~1C6O      
2012 10  21.34894  02 02 26.390  +15 43 19.02  24.4r 11UN411   568  C~1C6O      
2012 10  21.37460  02 02 26.233  +15 43 18.27  24.4r 11UN411   568  C~1C6O      
2013 02  06.29902  01 57 54.730  +15 12 56.63  24.2r 11UN411   568  C~1C6O      

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    -0.06       0.00    -0.01
  2   0.0001     -2.03    -0.16       0.22    -0.05
  3   0.1528  -4008.50     0.24     169.23    -0.11
  4   0.1529  -4012.61     0.05     169.45     0.05
  5   0.1530  -4017.52     0.08     169.40    -0.06
  6   0.1532  -4023.00     0.02     169.69     0.17
  7   0.1554  -4093.11     0.17     169.95     0.18
  8   0.1555  -4097.95     0.09     169.78    -0.05
  9   0.1556  -4101.88     0.07     169.71    -0.16
 10   0.1698  -4562.16    -0.03     170.81    -0.00
 11   0.2348  -6525.75    -0.03     140.86    -0.01
 12   0.2513  -6952.24     0.09     125.10     0.07
 13   0.4072  -8221.17    -0.22    -126.56    -0.09
 14   0.4102  -8189.25    -0.34    -132.02    -0.09
 15   0.9665   7833.09    -0.07     103.77    -0.01
 16   0.9804   7726.77    -0.23     131.86     0.14
 17   0.9829   7703.26     0.03     136.61    -0.03
 18   0.9855   7677.11     0.12     141.86     0.12
 19   0.9857   7674.55    -0.02     142.35     0.12
 20   1.1439   3886.62     0.08     338.88     0.02
 21   1.1439   3884.22    -0.00     338.89    -0.01
 22   1.1440   3881.84    -0.08     338.96     0.02
 23   1.4395   -430.88     0.19     -19.52    -0.23

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.

11UN411    quality flag:3

Type:          5:3EE     5:3EE     5:3EE

axisobj        42.782    42.817    42.750
ecceobj         0.218     0.220     0.217
incobj          3.232     3.232     3.232
qmin           32.966    32.982    32.988
qmax           52.127    52.378    52.181
amean          42.327    42.327    42.327
amin           41.926    41.878    41.927
amax           42.789    42.849    42.790
emean           0.204     0.204     0.204
emin            0.190     0.188     0.191
emax            0.220     0.223     0.219
imean           4.679     4.792     4.643
imin            4.225     4.218     4.257
imax            5.262     5.524     5.163
excite_mean     0.220     0.221     0.220
fracstop        1.000     1.000     1.000
cjmean          3.024     3.024     3.025

libcent 0       179.0     180.4     180.2
libamp  0        52.8      72.0      32.6
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       158.4     180.1     158.5
kozaiamp        180.0     180.0     180.0