Orbit Fit and Astrometric record for 06QR181

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: 06QR181   
# Created Wed Oct 18 01:37:40 2017
# Orbit generated from Bernstein formalism
# Fitting   18 observations of   18
# Arc:   8.17y
# First observation: 2006/08/22
#  Last observation: 2014/10/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000088   0.027129   0.000006   0.000812   0.025428   0.000000
# Chi-squared of fit:    13.88 DOF:   30 RMS:  0.16
# Min/Max residuals:    -0.39    0.37
# Exact a, adot, b, bdot, g, gdot:
  1.586574E-05  2.746018E-02 -7.329592E-07  8.139982E-04  2.583988E-02  4.139652E-03
# Covariance matrix:
  2.7361E-13 -9.9109E-14  4.1307E-15 -4.0532E-15  1.3880E-13 -3.8634E-13
 -9.9109E-14  2.0474E-13 -3.2026E-15  6.8706E-15  6.8039E-14  9.3387E-13
  4.1307E-15 -3.2026E-15  1.3272E-13 -2.0663E-14  3.2075E-15 -1.5558E-14
 -4.0532E-15  6.8706E-15 -2.0663E-14  8.6492E-15  4.0615E-16  3.2828E-14
  1.3880E-13  6.8039E-14  3.2075E-15  4.0615E-16  2.7520E-13  3.0463E-13
 -3.8634E-13  9.3387E-13 -1.5558E-14  3.2828E-14  3.0463E-13  4.4432E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    9.846907   10.994670    0.674317    0.129246   -0.743876  2453969.785404
# Heliocentric elements and errors
Epoch:              2453960.5000  =  2006/08/13
Mean Anomaly:           33.52387 +/-     0.011
Argument of Peri:       29.73515 +/-     0.017
Long of Asc Node:      291.06708 +/-     0.001
Inclination:             9.83829 +/-     0.000
Eccentricity:         0.20052881 +/-    0.0001
Semi-Major Axis:     46.46721074 +/-    0.0050
Time of Perihelion: 2443186.6731 +/-       3.0
Perihelion:          37.14919611 +/-    0.0059
Aphelion:            55.78522536 +/-    0.0074
Period (y)              316.7584 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           38.29652514 +/-    0.0008
Ecliptic Y            6.75115129 +/-    0.0001
Ecliptic Z            6.61826113 +/-    0.0001
Ecliptic XDOT        -0.00014062 +/-    0.0000
Ecliptic YDOT         0.00293083 +/-    0.0000
Ecliptic ZDOT         0.00015994 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.44620720 +/-    0.0007
Geocenter to KBO     38.69987330 +/-    0.0008
# Hcoef:  7.19

The following table shows the complete astrometric record for 06QR181. 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 (06QR181) followed by the observatory code and reference code for the source of the astrometry.

2006 08  22.28465  00 24 38.25   +13 23 39.2   22.3R 06QR181   807  Cs5502      
2006 08  23.20556  00 24 34.92   +13 23 28.0         06QR181   807  Cs5502      
2006 08  23.27405  00 24 34.65   +13 23 27.4         06QR181   807  Cs5502      
2006 10  19.25145  00 20 17.01   +12 59 38.5   23.1R 06QR181   695  Ct0530      
2006 10  19.35491  00 20 16.54   +12 59 35.3         06QR181   695  Ct0530      
2006 10  20.30911  00 20 12.31   +12 59 03.4         06QR181   695  Ct0530      
2006 12  21.10999  00 17 47.23   +12 31 24.2   23.0R 06QR181   695  Ct5545      
2006 12  21.25788  00 17 47.31   +12 31 22.6         06QR181   695  Ct5545      
2007 07  12.39645  00 31 46.97   +14 01 42.8         06QR181   304  C~02IB      
2007 07  12.45109  00 31 46.94   +14 01 43.7         06QR181   304  C~02IB      
2008 10  23.33819  00 31 39.22   +14 17 37.9   23.0r 06QR181   695  C~02IB      
2008 10  23.40014  00 31 38.93   +14 17 35.8   22.9r 06QR181   695  C~02IB      
2008 10  24.22652  00 31 35.32   +14 17 08.7   22.5r 06QR181   695  C~02IB      
2008 10  24.30257  00 31 34.99   +14 17 06.3   22.3r 06QR181   695  C~02IB      
2014 09  27.42341  01 08 42.32   +18 11 38.1   23.9R 06QR181   695  C~1LJh      
2014 09  27.47707  01 08 42.08   +18 11 37.3         06QR181   695  C~1LJh      
2014 10  22.18754  01 06 43.44   +18 00 24.6   23.4R 06QR181   G37  C~1BxM      
2014 10  22.29501  01 06 42.92   +18 00 21.4         06QR181   G37  C~1BxM      

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     0.19       0.00     0.25
  2   0.0025    -49.00     0.01       9.25    -0.23
  3   0.0027    -52.85    -0.10      10.28     0.05
  4   0.1587  -4072.66     0.01     220.74    -0.01
  5   0.1590  -4080.24     0.10     220.60     0.21
  6   0.1616  -4149.72     0.03     216.50    -0.09
  7   0.3308  -6765.27    -0.39    -436.93    -0.06
  8   0.3312  -6764.85     0.22    -438.87     0.15
  9   0.8874   6642.51     0.05    -391.94    -0.11
 10   0.8875   6642.46    -0.18    -390.94     0.03
 11   2.1713   6916.17     0.05     530.62    -0.17
 12   2.1714   6911.46    -0.14     530.35    -0.13
 13   2.1737   6852.48    -0.01     526.16    -0.02
 14   2.1739   6847.12     0.16     525.85     0.04
 15   8.0989  42432.23    -0.23    1575.10     0.03
 16   8.0991  42428.60     0.12    1575.56     0.37
 17   8.1667  40534.77     0.04    1543.22    -0.21
 18   8.1670  40526.38     0.07    1542.85    -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.

06QR181    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        47.027    47.042    47.011
ecceobj         0.207     0.207     0.206
incobj          9.840     9.840     9.840
qmin           36.361    36.352    36.353
qmax           57.486    57.600    57.432
amean          46.686    46.699    46.670
amin           46.279    46.288    46.249
amax           47.199    47.200    47.156
emean           0.204     0.205     0.204
emin            0.190     0.190     0.190
emax            0.219     0.221     0.219
imean          11.424    11.424    11.424
imin           10.775    10.777    10.769
imax           12.120    12.119    12.121
excite_mean     0.285     0.285     0.284
fracstop        1.000     1.000     1.000
cjmean          3.034     3.034     3.034

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       179.1     179.1     179.4
kozaiamp        179.9     180.0     180.0