Orbit Fit and Astrometric record for 11UL412

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: 11UL412   
# Created Wed Oct 18 01:37:59 2017
# Orbit generated from Bernstein formalism
# Fitting   21 observations of   21
# Arc:   1.44y
# First observation: 2011/08/30
#  Last observation: 2013/02/06
Preliminary a, adot, b, bdot, g, gdot:
  -0.000172   0.022458  -0.000002  -0.003608   0.023518   0.000000
# Chi-squared of fit:     6.60 DOF:   36 RMS:  0.10
# Min/Max residuals:    -0.16    0.23
# Exact a, adot, b, bdot, g, gdot:
  1.437346E-05  2.236497E-02 -3.027042E-06 -3.653857E-03  2.365926E-02  2.333672E-03
# Covariance matrix:
  3.3468E-13  8.5497E-14  6.5417E-15 -9.6132E-14  4.0309E-13  1.9746E-11
  8.5497E-14  5.9248E-13  1.0435E-14 -1.2799E-13  4.4230E-13  2.5649E-11
  6.5417E-15  1.0435E-14  1.2448E-13 -1.4292E-13  1.5911E-14  1.4462E-12
 -9.6132E-14 -1.2799E-13 -1.4292E-13  4.1865E-13 -2.0969E-13 -1.5359E-11
  4.0309E-13  4.4230E-13  1.5911E-14 -2.0969E-13  7.8943E-13  4.2462E-11
  1.9746E-11  2.5649E-11  1.4462E-12 -1.5359E-11  4.2462E-11  3.0057E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    4.950168   32.740203    0.836838    0.048254   -0.557492  2455804.008306
# Heliocentric elements and errors
Epoch:              2455800.5000  =  2011/08/27
Mean Anomaly:           77.85635 +/-     0.189
Argument of Peri:       64.27314 +/-     0.065
Long of Asc Node:      239.51126 +/-     0.004
Inclination:            10.35045 +/-     0.001
Eccentricity:         0.08395091 +/-    0.0024
Semi-Major Axis:     43.30170145 +/-    0.0183
Time of Perihelion: 2433291.9557 +/-      52.8
Perihelion:          39.66648406 +/-    0.1059
Aphelion:            46.93691883 +/-    0.1064
Period (y)              284.9480 +/-      0.18
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           36.34594140 +/-    0.0013
Ecliptic Y           22.37386575 +/-    0.0008
Ecliptic Z            3.64706407 +/-    0.0001
Ecliptic XDOT        -0.00114588 +/-    0.0000
Ecliptic YDOT         0.00234755 +/-    0.0000
Ecliptic ZDOT        -0.00039788 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.83594753 +/-    0.0012
Geocenter to KBO     42.26675650 +/-    0.0016
# Hcoef:  7.72

The following table shows the complete astrometric record for 11UL412. 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 (11UL412) followed by the observatory code and reference code for the source of the astrometry.

2011 08  30.50754  01 55 03.637  +17 04 02.66  23.9r 11UL412   568  C~1C6Q      
2011 08  30.55405  01 55 03.509  +17 04 02.13        11UL412   568  C~1C6Q      
2011 08  30.60048  01 55 03.405  +17 04 01.81  23.7r 11UL412   568  C~1C6Q      
2011 09  05.60174  01 54 47.867  +17 03 01.59  23.8r 11UL412   568  C~1C6Q      
2011 10  25.35082  01 51 26.571  +16 45 42.05  23.7r 11UL412   568  C~1C6Q      
2011 10  25.40068  01 51 26.327  +16 45 40.61        11UL412   568  C~1C6Q      
2011 10  26.29977  01 51 22.138  +16 45 15.81  23.8r 11UL412   568  C~1C6Q      
2011 10  26.30951  01 51 22.094  +16 45 15.59  23.8r 11UL412   568  C~1C6Q      
2011 10  26.35267  01 51 21.894  +16 45 14.38  23.8r 11UL412   568  C~1C6Q      
2011 10  26.41016  01 51 21.612  +16 45 12.71  23.8r 11UL412   568  C~1C6Q      
2011 10  31.40135  01 50 58.445  +16 42 53.44  23.7r 11UL412   568  C~1C6Q      
2011 10  31.44834  01 50 58.218  +16 42 52.11  23.9r 11UL412   568  C~1C6Q      
2011 11  24.27497  01 49 16.060  +16 31 44.09  23.8r 11UL412   568  C~1C6Q      
2011 11  30.32106  01 48 54.093  +16 29 04.39  24.1r 11UL412   568  C~1C6Q      
2012 01  26.30218  01 47 48.470  +16 14 39.29  23.9r 11UL412   568  C~1C6Q      
2012 01  27.23615  01 47 49.878  +16 14 38.19  24.4r 11UL412   568  C~1C6Q      
2012 08  17.57715  02 00 45.272  +17 19 59.22  24.1r 11UL412   568  C~1C6Q      
2012 08  24.53489  02 00 34.504  +17 19 32.86  24.1r 11UL412   568  C~1C6Q      
2012 10  17.37819  01 57 23.311  +17 04 21.25  23.9r 11UL412   568  C~1C6Q      
2013 01  14.34579  01 52 53.748  +16 31 04.71  23.6r 11UL412   568  C~1C6Q      
2013 02  06.27606  01 53 24.393  +16 30 18.21  24.2r 11UL412   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     0.12       0.00     0.12
  2   0.0001     -1.90    -0.12       0.15     0.06
  3   0.0003     -3.41     0.03       0.37     0.09
  4   0.0167   -233.21     0.03      21.98    -0.07
  5   0.1529  -3303.45     0.03      66.90    -0.12
  6   0.1530  -3307.23    -0.09      66.80    -0.15
  7   0.1555  -3372.30    -0.08      64.93    -0.09
  8   0.1555  -3372.97    -0.03      64.95    -0.06
  9   0.1556  -3376.09     0.02      64.83    -0.11
 10   0.1558  -3380.47    -0.13      64.71    -0.14
 11   0.1695  -3741.12     0.17      52.50     0.03
 12   0.1696  -3744.65     0.08      52.41     0.06
 13   0.2348  -5355.38    -0.02     -49.41     0.23
 14   0.2514  -5707.75    -0.02     -85.80     0.14
 15   0.4074  -6900.39    -0.09    -555.86    -0.09
 16   0.4099  -6881.83     0.10    -564.16     0.06
 17   0.9667   4924.41    -0.02    -799.42     0.16
 18   0.9857   4770.46    -0.08    -771.24     0.05
 19   1.1331   1883.72     0.15    -680.78    -0.16
 20   1.3767  -2441.33    -0.04   -1196.74    -0.07
 21   1.4395  -2045.19    -0.01   -1395.51     0.06

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.

11UL412    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.389    43.446    43.335
ecceobj         0.085     0.092     0.078
incobj         10.345    10.345    10.345
qmin           38.792    38.631    39.009
qmax           47.669    47.906    47.282
amean          43.094    43.129    43.039
amin           42.752    42.780    42.706
amax           43.457    43.503    43.403
emean           0.083     0.088     0.076
emin            0.068     0.072     0.063
emax            0.097     0.101     0.090
imean          11.964    11.941    11.951
imin           11.327    11.268    11.323
imax           12.577    12.617    12.568
excite_mean     0.223     0.225     0.221
fracstop        1.000     1.000     1.000
cjmean          3.031     3.031     3.032

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     177.1     180.4
kozaiamp        179.9     180.0     179.9