Orbit Fit and Astrometric record for 06HC123

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: 06HC123   
# Created Wed Jan 24 02:37:33 2018
# Orbit generated from Bernstein formalism
# Fitting    8 observations of    8
# Arc:   0.98y
# First observation: 2006/04/28
#  Last observation: 2007/04/21
Preliminary a, adot, b, bdot, g, gdot:
  -0.000008   0.022999   0.000005  -0.005137   0.025018   0.000000
# Chi-squared of fit:     7.27 DOF:   10 RMS:  0.17
# Min/Max residuals:    -0.27    0.44
# Exact a, adot, b, bdot, g, gdot:
  1.452516E-05  2.303297E-02 -2.500581E-06 -5.152536E-03  2.535042E-02  2.293543E-03
# Covariance matrix:
  4.1104E-13  3.8617E-12  4.8636E-14 -9.1350E-13  2.0247E-12  1.7754E-10
  3.8617E-12  6.3018E-10  7.1180E-12 -1.3429E-10  2.6271E-10  2.6101E-08
  4.8636E-14  7.1180E-12  3.7534E-13 -1.8751E-12  2.9756E-12  2.9538E-10
 -9.1350E-13 -1.3429E-10 -1.8751E-12  2.9826E-11 -5.6126E-11 -5.5727E-09
  2.0247E-12  2.6271E-10  2.9756E-12 -5.6126E-11  1.1051E-10  1.0909E-08
  1.7754E-10  2.6101E-08  2.9538E-10 -5.5727E-09  1.0909E-08  1.0831E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.417961 -124.202915    0.310873    0.007065   -0.952820  2453853.749114
# Heliocentric elements and errors
Epoch:              2453850.5000  =  2006/04/25
Mean Anomaly:          132.97046 +/-    14.151
Argument of Peri:       35.10268 +/-    13.755
Long of Asc Node:       57.18458 +/-     0.001
Inclination:            12.57282 +/-     0.006
Eccentricity:         0.13416861 +/-    0.0225
Semi-Major Axis:     36.73593713 +/-    0.2694
Time of Perihelion: 2423811.3391 +/-    3179.8
Perihelion:          31.80712735 +/-    0.8578
Aphelion:            41.66474691 +/-    0.8802
Period (y)              222.6614 +/-      2.45
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -22.96937071 +/-    0.0092
Ecliptic Y          -33.24046126 +/-    0.0135
Ecliptic Z            0.28765876 +/-    0.0001
Ecliptic XDOT         0.00191964 +/-    0.0001
Ecliptic YDOT        -0.00161224 +/-    0.0001
Ecliptic ZDOT        -0.00055468 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.40548234 +/-    0.0123
Geocenter to KBO     39.44708426 +/-    0.0164
# Hcoef:  7.21

The following table shows the complete astrometric record for 06HC123. 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 (06HC123) followed by the observatory code and reference code for the source of the astrometry.

2006 04  28.24836  15 34 17.61   -18 48 03.3   22.0R 06HC123   807  Cr3609      
2006 04  28.30820  15 34 17.32   -18 48 02.6         06HC123   807  Cr3609      
2006 05  01.37825  15 34 01.99   -18 47 17.7   23.8R 06HC123   695  Cr3609      
2006 05  01.45083  15 34 01.64   -18 47 17.2         06HC123   695  Cr3609      
2006 07  28.01709  15 28 09.49   -18 31 18.5   23.5R 06HC123   304  Cr5556      
2006 07  28.12370  15 28 09.36   -18 31 18.3         06HC123   304  Cr5556      
2007 04  21.22080  15 40 01.004  -19 25 14.48  22.5R 06HC123   807              
2007 04  21.31409  15 40 00.553  -19 25 13.15        06HC123   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    -0.03       0.00    -0.15
  2   0.0002     -4.17     0.15      -0.29    -0.27
  3   0.0086   -226.30    -0.27      -8.12     0.44
  4   0.0088   -231.25     0.15      -8.81    -0.04
  5   0.2485  -5320.80     0.03    -282.24    -0.05
  6   0.2488  -5322.64    -0.02    -282.50     0.06
  7   0.9801   5253.28     0.12   -1040.03    -0.07
  8   0.9803   5246.76    -0.12   -1040.19     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.

06HC123    quality flag:2

Type:           4:3E  CENTAURR  CENTAURR

axisobj        36.360    37.649    36.048
ecceobj         0.141     0.223     0.122
incobj         12.642    12.625    12.656
qmin           30.705    28.863    29.429
qmax           42.610    61.989    47.659
amean          36.478    38.909    36.242
amin           36.108    35.933    34.486
amax           36.894    45.632    39.338
emean           0.136     0.221     0.136
emin            0.111     0.141     0.076
emax            0.158     0.359     0.212
imean           8.242    13.791    11.913
imin            6.297    11.516     9.665
imax           11.741    15.761    14.465
excite_mean     0.199     0.328     0.249
fracstop        1.000     0.246     0.741
cjmean          2.984     2.926     2.957

libcent 0       179.1    -180.0    -180.0
libamp  0        79.9    -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       179.0     187.1     171.7
kozaiamp        180.0     179.8     180.0