Orbit Fit and Astrometric record for 06QG181

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: 06QG181   
# Created Thu Apr 26 01:37:33 2018
# Orbit generated from Bernstein formalism
# Fitting   17 observations of   17
# Arc:   8.17y
# First observation: 2006/08/21
#  Last observation: 2014/10/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.002915   0.055711   0.000461   0.007032   0.033451   0.000000
# Chi-squared of fit:     4.35 DOF:   28 RMS:  0.09
# Min/Max residuals:    -0.17    0.22
# Exact a, adot, b, bdot, g, gdot:
  2.264602E-05  6.228874E-02  3.651749E-06  7.961540E-03  4.206068E-02  2.586887E-02
# Covariance matrix:
  4.5624E-13  4.2179E-13 -2.8240E-14  5.8660E-14  7.7373E-13  1.0588E-12
  4.2179E-13  1.1785E-12 -7.0041E-14  1.5528E-13  1.4554E-12  2.7572E-12
 -2.8240E-14 -7.0041E-14  1.4543E-13 -2.9470E-14 -8.9803E-14 -1.6520E-13
  5.8660E-14  1.5528E-13 -2.9470E-14  2.8584E-14  1.9312E-13  3.6576E-13
  7.7373E-13  1.4554E-12 -8.9803E-14  1.9312E-13  2.1489E-12  3.4551E-12
  1.0588E-12  2.7572E-12 -1.6520E-13  3.6576E-13  3.4551E-12  6.4967E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.710527   46.784312    0.992010    0.002640   -0.202262  2453968.832664
# Heliocentric elements and errors
Epoch:              2453960.5000  =  2006/08/13
Mean Anomaly:            9.69049 +/-     0.004
Argument of Peri:      313.33098 +/-     0.007
Long of Asc Node:       38.86663 +/-     0.000
Inclination:             7.24475 +/-     0.000
Eccentricity:         0.64392770 +/-    0.0001
Semi-Major Axis:     57.14367995 +/-    0.0137
Time of Perihelion: 2449713.3863 +/-       0.3
Perihelion:          20.34728150 +/-    0.0061
Aphelion:            93.94007840 +/-    0.0229
Period (y)              431.9769 +/-      0.16
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           17.13677858 +/-    0.0006
Ecliptic Y           16.79055270 +/-    0.0006
Ecliptic Z            0.29489679 +/-    0.0000
Ecliptic XDOT        -0.00180181 +/-    0.0000
Ecliptic YDOT         0.00399384 +/-    0.0000
Ecliptic ZDOT         0.00053904 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   23.99330749 +/-    0.0006
Geocenter to KBO     23.77517163 +/-    0.0008
# Hcoef:  9.02

The following table shows the complete astrometric record for 06QG181. 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 (06QG181) followed by the observatory code and reference code for the source of the astrometry.

2006 08  21.33191  02 56 25.50   +17 31 57.2   21.6R 06QG181   807  Cs5502      
2006 08  22.31581  02 56 25.58   +17 32 04.3         06QG181   807  Cs5502      
2006 08  23.30379  02 56 25.52   +17 32 10.4         06QG181   807  Cs5502      
2006 10  19.29748  02 52 23.03   +17 20 41.6   22.4R 06QG181   695  Ct0530      
2006 10  19.30906  02 52 22.94   +17 20 41.3         06QG181   695  Ct0530      
2006 10  20.22801  02 52 16.12   +17 20 16.7         06QG181   695  Ct0530      
2006 10  20.23969  02 52 16.03   +17 20 16.4         06QG181   695  Ct0530      
2006 10  20.35183  02 52 15.17   +17 20 13.6         06QG181   695  Ct0530      
2006 10  20.36327  02 52 15.10   +17 20 13.0         06QG181   695  Ct0530      
2008 12  22.25751  03 12 05.04   +19 40 53.3       R 06QG181   695              
2008 12  22.34023  03 12 04.58   +19 40 51.5       R 06QG181   695              
2008 12  22.34565  03 12 04.55   +19 40 51.4       R 06QG181   695              
2014 09  26.37438  04 32 58.04   +25 37 35.4   24.2R 06QG181   695  C~1T0Z      
2014 09  26.41964  04 32 57.94   +25 37 35.6         06QG181   695  C~1T0Z      
2014 09  26.46437  04 32 57.86   +25 37 35.7         06QG181   695  C~1T0Z      
2014 10  22.36933  04 31 21.98   +25 38 16.6   23.8R 06QG181   G37  C~1T0Z      
2014 10  22.46231  04 31 21.47   +25 38 16.3         06QG181   G37  C~1T0Z      

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     0.16       0.00    -0.14
  2   0.0027      3.12    -0.06       6.48     0.17
  3   0.0054      4.04    -0.10      12.57     0.05
  4   0.1614  -3517.71     0.10     353.05    -0.07
  5   0.1615  -3519.03     0.06     353.14    -0.05
  6   0.1640  -3619.65    -0.03     358.00    -0.03
  7   0.1640  -3620.97    -0.05     358.09    -0.01
  8   0.1643  -3633.57    -0.11     358.99     0.22
  9   0.1644  -3634.70     0.03     358.71    -0.13
 10   2.3379  14997.23     0.03    3765.89     0.06
 11   2.3381  14990.45    -0.01    3765.87    -0.04
 12   2.3382  14990.01    -0.01    3765.89    -0.03
 13   8.0987  90253.24     0.03   11808.22     0.12
 14   8.0988  90251.68    -0.10   11808.61     0.04
 15   8.0989  90250.42     0.08   11808.86    -0.17
 16   8.1698  88730.64     0.05   12025.38     0.02
 17   8.1701  88722.49    -0.07   12025.98    -0.01

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.

06QG181    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        58.844    58.893    58.794
ecceobj         0.654     0.654     0.653
incobj          7.222     7.222     7.222
qmin           19.954    20.110    19.866
qmax          100.999   110.188    97.203
amean          57.732    61.033    54.957
amin           54.350    57.304    52.570
amax           60.894    65.757    58.794
emean           0.645     0.662     0.630
emin            0.623     0.641     0.614
emax            0.663     0.684     0.655
imean           7.140     7.326     7.512
imin            6.316     6.717     6.680
imax            8.297     9.298     9.486
excite_mean     0.657     0.674     0.644
fracstop        0.048     0.051     0.042
cjmean          2.618     2.607     2.624

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       163.3     159.2     152.7
kozaiamp        179.9     179.7     179.6