Orbit Fit and Astrometric record for 06QS181

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: 06QS181   
# Created Tue Oct 24 01:37:39 2017
# Orbit generated from Bernstein formalism
# Fitting    8 observations of    8
# Arc: 120.96d
# First observation: 2006/08/22
#  Last observation: 2006/12/21
Preliminary a, adot, b, bdot, g, gdot:
  -0.000039   0.042589  -0.000067  -0.005572   0.029581   0.000000
# Chi-squared of fit:    17.90 DOF:   10 RMS:  0.26
# Min/Max residuals:    -0.64    0.43
# Exact a, adot, b, bdot, g, gdot:
  1.851171E-05  3.141583E-02 -4.357524E-06 -6.327215E-03  2.769760E-02  9.057093E-03
# Covariance matrix:
  5.0218E-13 -8.6316E-13  3.5891E-16 -1.6593E-13  6.6948E-13  7.6734E-11
 -8.6316E-13  2.3811E-09 -1.4484E-11  1.8586E-10  3.2071E-10 -2.3255E-08
  3.5891E-16 -1.4484E-11  5.0035E-13 -2.7564E-12 -1.9294E-12  1.4671E-10
 -1.6593E-13  1.8586E-10 -2.7564E-12  2.6533E-11  2.3743E-11 -2.0326E-09
  6.6948E-13  3.2071E-10 -1.9294E-12  2.3743E-11  4.6982E-11 -2.6186E-09
  7.6734E-11 -2.3255E-08  1.4671E-10 -2.0326E-09 -2.6186E-09  3.0636E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
   10.081050   10.613355    0.669220    0.133077   -0.747792  2453969.789764
# Heliocentric elements and errors
Epoch:              2453960.5000  =  2006/08/13
Mean Anomaly:           21.01738 +/-     0.675
Argument of Peri:       85.54387 +/-     1.944
Long of Asc Node:      230.64554 +/-     0.049
Inclination:            14.83191 +/-     0.014
Eccentricity:         0.42173985 +/-    0.0160
Semi-Major Axis:     56.36332866 +/-    0.8577
Time of Perihelion: 2444937.1164 +/-     203.6
Perihelion:          32.59266716 +/-    1.0286
Aphelion:            80.13399015 +/-    1.5162
Period (y)              423.1586 +/-      9.66
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           35.80538349 +/-    0.0086
Ecliptic Y            6.02628290 +/-    0.0016
Ecliptic Z            6.31955039 +/-    0.0016
Ecliptic XDOT         0.00040656 +/-    0.0001
Ecliptic YDOT         0.00322988 +/-    0.0000
Ecliptic ZDOT        -0.00045911 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.85482722 +/-    0.0084
Geocenter to KBO     36.10421281 +/-    0.0089
# Hcoef:  7.98

The following table shows the complete astrometric record for 06QS181. 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 (06QS181) followed by the observatory code and reference code for the source of the astrometry.

2006 08  22.28901  00 22 50.18   +13 27 28.0   22.8R 06QS181   807  Cs5502      
2006 08  23.20946  00 22 46.78   +13 27 13.4         06QS181   807  Cs5502      
2006 08  23.27814  00 22 46.49   +13 27 12.2         06QS181   807  Cs5502      
2006 10  19.24752  00 18 20.61   +12 58 27.3   23.3R 06QS181   695  Ct0530      
2006 10  19.35113  00 18 20.06   +12 58 23.4         06QS181   695  Ct0530      
2006 10  20.30517  00 18 15.80   +12 57 46.5         06QS181   695  Ct0530      
2006 12  21.10622  00 15 54.72   +12 24 53.3   24.0R 06QS181   695  Ct5545      
2006 12  21.25352  00 15 54.84   +12 24 51.1         06QS181   695  Ct5545      

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     0.15
  2   0.0025    -51.28     0.25       6.57    -0.11
  3   0.0027    -55.64    -0.13       7.18    -0.05
  4   0.1587  -4304.76     0.21      -1.65    -0.25
  5   0.1590  -4313.70    -0.64      -1.95     0.27
  6   0.1616  -4385.62     0.43     -10.38    -0.01
  7   0.3308  -7076.85    -0.31    -972.40    -0.08
  8   0.3312  -7076.15     0.31    -975.13     0.08

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.

06QS181    quality flag:2

Type:       SCATNEAR  CENTAURS  SCATNEAR

axisobj        57.154    60.123    54.969
ecceobj         0.427     0.475     0.384
incobj         14.784    14.814    14.754
qmin           32.118    29.551    33.318
qmax           82.174    93.020    76.646
amean          56.341    57.750    54.156
amin           55.334    52.369    53.249
amax           57.489    61.861    55.225
emean           0.406     0.457     0.362
emin            0.385     0.405     0.335
emax            0.432     0.504     0.388
imean          17.066    15.551    17.089
imin           15.538    12.508    15.637
imax           18.251    18.101    18.570
excite_mean     0.501     0.530     0.466
fracstop        1.000     1.000     1.000
cjmean          2.923     2.894     2.945

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       184.9     174.9     177.3
kozaiamp        180.0     180.0     180.0