Orbit Fit and Astrometric record for 06HG123

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: 06HG123   
# Created Wed Oct 18 01:37:39 2017
# Orbit generated from Bernstein formalism
# Fitting    8 observations of    8
# Arc:   0.99y
# First observation: 2006/04/26
#  Last observation: 2007/04/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000002   0.025341  -0.000014   0.012495   0.027521   0.000000
# Chi-squared of fit:     6.40 DOF:   10 RMS:  0.16
# Min/Max residuals:    -0.33    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.452817E-05  2.495219E-02  6.898078E-06  1.231460E-02  2.768224E-02 -1.357077E-02
# Covariance matrix:
  3.7792E-13  4.1171E-13 -1.2140E-14  3.9341E-13  6.8947E-13  3.1202E-11
  4.1171E-13  3.2541E-10 -5.6721E-12  1.5580E-10  1.0616E-10  1.2309E-08
 -1.2140E-14 -5.6721E-12  3.7270E-13 -3.0348E-12 -1.8544E-12 -2.1524E-10
  3.9341E-13  1.5580E-10 -3.0348E-12  7.5926E-11  5.1200E-11  5.9143E-09
  6.8947E-13  1.0616E-10 -1.8544E-12  5.1200E-11  3.6746E-11  4.0456E-09
  3.1202E-11  1.2309E-08 -2.1524E-10  5.9143E-09  4.0456E-09  4.6726E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.152075 -148.462155   -0.071354    0.037647   -0.998458  2453851.596784
# Heliocentric elements and errors
Epoch:              2453850.5000  =  2006/04/25
Mean Anomaly:          317.40921 +/-     1.972
Argument of Peri:      100.20050 +/-     0.189
Long of Asc Node:      207.39328 +/-     0.001
Inclination:            26.22874 +/-     0.003
Eccentricity:         0.46572005 +/-    0.0233
Semi-Major Axis:     45.31042742 +/-    1.2347
Time of Perihelion: 2467030.3011 +/-     286.4
Perihelion:          24.20845275 +/-    1.2468
Aphelion:            66.41240209 +/-    2.0963
Period (y)              305.0039 +/-     12.47
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -31.58428204 +/-    0.0067
Ecliptic Y          -19.46866782 +/-    0.0041
Ecliptic Z            1.35677516 +/-    0.0003
Ecliptic XDOT         0.00247674 +/-    0.0001
Ecliptic YDOT        -0.00138357 +/-    0.0000
Ecliptic ZDOT         0.00116666 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.12730447 +/-    0.0061
Geocenter to KBO     36.12425016 +/-    0.0079
# Hcoef:  7.16

The following table shows the complete astrometric record for 06HG123. 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 (06HG123) followed by the observatory code and reference code for the source of the astrometry.

2006 04  26.09603  14 00 33.53   -09 59 21.0   22.5R 06HG123   807  Cr3950      
2006 04  26.17946  14 00 33.10   -09 59 18.5         06HG123   807  Cr3950      
2006 04  27.15246  14 00 28.10   -09 58 44.0         06HG123   807  Cr3950      
2006 04  27.20233  14 00 27.84   -09 58 42.1         06HG123   807  Cr3950      
2006 06  19.98328  13 56 49.28   -09 33 59.4   23.1R 06HG123   304  Cr4858      
2006 06  20.07744  13 56 49.06   -09 33 57.9         06HG123   304  Cr4858      
2007 04  22.24032  14 07 27.221  -09 51 14.69  21.8R 06HG123   807              
2007 04  22.30373  14 07 26.846  -09 51 12.61        06HG123   807              

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     0.03
  2   0.0002     -6.82     0.17       0.16    -0.33
  3   0.0029    -88.05    -0.03       7.12     0.08
  4   0.0030    -92.31    -0.08       7.58     0.23
  5   0.1503  -3636.85    -0.02     282.44     0.01
  6   0.1505  -3640.42     0.03     282.72    -0.02
  7   0.9888   5579.83     0.24    2547.05     0.18
  8   0.9889   5573.90    -0.24    2547.13    -0.18

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.

06HG123    quality flag:1

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        44.719    48.818    41.714
ecceobj         0.464     0.532     0.397
incobj         26.384    26.379    26.389
qmin           23.831    22.670    25.133
qmax           67.694    77.002    59.707
amean          45.077    49.198    41.722
amin           44.531    48.443    40.808
amax           45.867    50.093    42.540
emean           0.465     0.532     0.388
emin            0.457     0.523     0.374
emax            0.476     0.539     0.404
imean          26.528    26.650    26.940
imin           26.324    26.476    26.604
imax           26.703    26.836    27.176
excite_mean     0.645     0.696     0.596
fracstop        0.012     0.012     0.022
cjmean          2.617     2.557     2.666

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       107.1     105.5     112.8
kozaiamp          6.1       5.2      11.0