Orbit Fit and Astrometric record for 06HW122

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: 06HW122   
# Created Fri Dec 15 02:37:24 2017
# Orbit generated from Bernstein formalism
# Fitting   14 observations of   14
# Arc:   8.99y
# First observation: 2006/04/27
#  Last observation: 2015/04/24
Preliminary a, adot, b, bdot, g, gdot:
  -0.000002   0.022581   0.000003  -0.000605   0.023187   0.000000
# Chi-squared of fit:    19.91 DOF:   22 RMS:  0.21
# Min/Max residuals:    -0.57    0.35
# Exact a, adot, b, bdot, g, gdot:
  1.498542E-05  2.257479E-02 -8.248147E-07 -6.042927E-04  2.337278E-02  1.346056E-03
# Covariance matrix:
  3.0248E-13 -7.5417E-14 -6.5476E-16  1.0993E-15  2.2002E-13 -2.0163E-13
 -7.5417E-14  1.8802E-13  2.3488E-15 -4.8334E-15  7.7808E-14  8.9570E-13
 -6.5476E-16  2.3488E-15  1.5130E-13 -2.2541E-14  1.1213E-15  1.1925E-14
  1.0993E-15 -4.8334E-15 -2.2541E-14  1.1378E-14 -2.7535E-15 -2.4662E-14
  2.2002E-13  7.7808E-14  1.1213E-15 -2.7535E-15  4.7167E-13  5.1402E-13
 -2.0163E-13  8.9570E-13  1.1925E-14 -2.4662E-14  5.1402E-13  4.5713E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.065478 -131.151110    0.209804   -0.001006   -0.979809  2453852.761234
# Heliocentric elements and errors
Epoch:              2453850.5000  =  2006/04/25
Mean Anomaly:           48.25631 +/-     0.058
Argument of Peri:      127.73579 +/-     0.070
Long of Asc Node:       46.17766 +/-     0.001
Inclination:             1.53136 +/-     0.000
Eccentricity:         0.07058634 +/-    0.0001
Semi-Major Axis:     45.78473426 +/-    0.0055
Time of Perihelion: 2438682.4040 +/-      17.9
Perihelion:          42.55295760 +/-    0.0069
Aphelion:            49.01651092 +/-    0.0075
Period (y)              309.8056 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -28.96015888 +/-    0.0008
Ecliptic Y          -32.81898319 +/-    0.0009
Ecliptic Z           -0.04892783 +/-    0.0000
Ecliptic XDOT         0.00189126 +/-    0.0000
Ecliptic YDOT        -0.00186450 +/-    0.0000
Ecliptic ZDOT        -0.00007099 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.76961107 +/-    0.0009
Geocenter to KBO     42.78480560 +/-    0.0013
# Hcoef:  6.37

The following table shows the complete astrometric record for 06HW122. 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 (06HW122) followed by the observatory code and reference code for the source of the astrometry.

2006 04  27.26048  15 05 29.74   -17 29 29.6   22.1R 06HW122   807  Cr3609      
2006 04  27.33297  15 05 29.40   -17 29 28.1         06HW122   807  Cr3609      
2006 04  28.17517  15 05 25.57   -17 29 12.9         06HW122   807  Cr3609      
2006 06  20.01817  15 01 38.81   -17 13 54.9   23.3R 06HW122   304  Cr4858      
2006 06  20.11242  15 01 38.48   -17 13 53.6         06HW122   304  Cr4858      
2006 08  21.04147  15 00 44.70   -17 10 25.0   22.0R 06HW122   807  Cs2782      
2006 08  22.03683  15 00 46.58   -17 10 33.2         06HW122   807  Cs2782      
2006 08  23.03895  15 00 48.54   -17 10 41.0         06HW122   807  Cs2782      
2007 04  21.19885  15 11 09.47   -17 54 22.8   21.3R 06HW122   807  Cv1549      
2007 04  22.26735  15 11 04.77   -17 54 04.0         06HW122   807  Cv1549      
2009 06  23.21173  15 16 56.63   -18 21 31.6   23.0R 06HW122   688  C~07c5      
2009 06  23.27900  15 16 56.43   -18 21 30.4         06HW122   688  C~07c5      
2015 04  24.35661  15 52 37.20   -20 35 46.3   23.2R 06HW122   G37  C~1ReK      
2015 04  24.45047  15 52 36.79   -20 35 45.6         06HW122   G37  C~1ReK      

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     0.09
  2   0.0002     -5.09    -0.06       0.11     0.23
  3   0.0025    -61.95    -0.07      -0.32     0.07
  4   0.1472  -3435.99     0.02     -17.18     0.06
  5   0.1474  -3440.89    -0.15     -17.25     0.05
  6   0.3170  -4239.37    -0.05     -32.62    -0.19
  7   0.3197  -4211.20     0.22     -32.94    -0.28
  8   0.3225  -4182.03    -0.02     -32.55     0.34
  9   0.9827   5078.72     0.30    -122.52    -0.28
 10   0.9856   5009.00    -0.20    -122.33     0.35
 11   3.1566  10289.27    -0.20    -390.39    -0.57
 12   3.1568  10286.20     0.14    -389.97    -0.12
 13   8.9914  42164.47     0.05   -1121.37     0.35
 14   8.9916  42158.45    -0.04   -1121.90    -0.12

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.

06HW122    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        45.170    45.186    45.154
ecceobj         0.062     0.063     0.062
incobj          1.538     1.538     1.538
qmin           41.752    41.756    41.741
qmax           49.570    49.558    49.490
amean          45.515    45.531    45.500
amin           45.146    45.163    45.136
amax           45.900    45.915    45.882
emean           0.066     0.066     0.065
emin            0.052     0.053     0.052
emax            0.080     0.080     0.079
imean           1.369     1.368     1.369
imin            0.869     0.872     0.866
imax            1.776     1.775     1.779
excite_mean     0.070     0.070     0.070
fracstop        1.000     1.000     1.000
cjmean          3.114     3.114     3.114

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       171.1     171.1     171.9
kozaiamp        179.8     180.0     179.9