Orbit Fit and Astrometric record for 13QQ95

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: 13QQ95    
# Created Tue Oct 24 01:38:17 2017
# Orbit generated from Bernstein formalism
# Fitting   10 observations of   11
# Arc:   3.10y
# First observation: 2010/08/30
#  Last observation: 2013/10/06
Preliminary a, adot, b, bdot, g, gdot:
  -0.000720   0.028998   0.000434  -0.014192   0.031330   0.000000
# Chi-squared of fit:    10.24 DOF:   14 RMS:  0.18
# Min/Max residuals:    -0.28    0.34
# Exact a, adot, b, bdot, g, gdot:
  1.243594E-05  2.661384E-02 -7.553500E-06 -1.291233E-02  3.068739E-02 -2.790029E-02
# Covariance matrix:
  7.0850E-13 -6.4186E-13 -7.9037E-14  2.1849E-13 -5.2319E-13 -4.5218E-12
 -6.4186E-13  1.6288E-12  3.0020E-13 -8.3510E-13  3.6663E-13  1.7483E-11
 -7.9037E-14  3.0020E-13  4.8188E-13 -3.1990E-13  2.2308E-14  3.5092E-12
  2.1849E-13 -8.3510E-13 -3.1990E-13  5.4626E-13 -5.7822E-14 -9.7723E-12
 -5.2319E-13  3.6663E-13  2.2308E-14 -5.7822E-14  1.3428E-12  1.0494E-12
 -4.5218E-12  1.7483E-11  3.5092E-12 -9.7723E-12  1.0494E-12  2.0498E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.845941  -37.488880   -0.247750   -0.031422   -0.973743  2455438.923476
# Heliocentric elements and errors
Epoch:              2455430.5000  =  2010/08/22
Mean Anomaly:          343.94838 +/-     0.033
Argument of Peri:      288.96064 +/-     0.008
Long of Asc Node:      139.20218 +/-     0.000
Inclination:            25.65950 +/-     0.001
Eccentricity:         0.77263149 +/-    0.0004
Semi-Major Axis:     66.82430219 +/-    0.0907
Time of Perihelion: 2464326.9424 +/-       2.8
Perihelion:          15.19374199 +/-    0.0320
Aphelion:           118.45486239 +/-    0.1627
Period (y)              546.2731 +/-      1.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           26.77142927 +/-    0.0010
Ecliptic Y          -20.21971710 +/-    0.0007
Ecliptic Z           -1.04990975 +/-    0.0000
Ecliptic XDOT        -0.00055779 +/-    0.0000
Ecliptic YDOT         0.00342709 +/-    0.0000
Ecliptic ZDOT        -0.00107125 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.56558796 +/-    0.0009
Geocenter to KBO     32.58667379 +/-    0.0012
# Hcoef:  6.94

The following table shows the complete astrometric record for 13QQ95. 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 (13QQ95) followed by the observatory code and reference code for the source of the astrometry.

2010 08  30.42271  21 41 57.309  -15 45 16.75  21.9r 13QQ95    F51  C~1w3u      
2010 08  30.43406  21 41 57.217  -15 45 17.71  21.9r 13QQ95    F51  C~1w3u      
2011 07  31.48401  21 52 08.235  -15 37 35.29  22.0g 13QQ95    F51  C~1w3u      
2011 07  31.51039  21 52 08.057  -15 37 36.63  21.1r 13QQ95    F51  C~1w3u      
2011 07  31.52139  21 52 07.989  -15 37 36.97  21.4r 13QQ95    F51  C~1w3u      
2012 09  04.43852  21 56 16.212  -16 12 06.91  20.9i 13QQ95    F51  C~1w3u      
2013 08  27.37380  22 05 14.299  -16 17 54.21  21.5r 13QQ95    F51  C~1w3u      
2013 08  27.38426  22 05 14.244  -16 17 54.27  21.5r 13QQ95    F51  C~1w3u      
2013 10  06.32084  22 01 37.377  -16 40 32.09  22.3w 13QQ95    F51  C~1w3v      
2013 10  06.33508  22 01 37.326  -16 40 32.13  22.6w 13QQ95    F51  C~1w3v      
2013 10  06.34934  22 01 37.253  -16 40 32.32  22.6w 13QQ95    F51  C~1w3v      

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     0.26       0.00     0.19
  2   0.0000     -1.57    -0.28      -0.47    -0.22
  3   0.9173   8476.03     0.34   -2509.86     0.09
  4   0.9174   8473.15    -0.14   -2510.24    -0.08
  5   0.9175   8472.11    -0.18   -2510.23     0.03
  6   2.0151  11138.05 (  -0.83)  -5685.24 (   0.86)
  7   2.9923  18323.05    -0.15   -8737.54    -0.07
  8   2.9924  18322.28     0.14   -8737.32     0.23
  9   3.1017  14899.72    -0.09   -8903.73    -0.28
 10   3.1017  14899.02     0.12   -8903.51    -0.04
 11   3.1018  14897.96    -0.02   -8903.32     0.16

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.

13QQ95    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        66.631    66.879    66.386
ecceobj         0.773     0.774     0.772
incobj         25.680    25.680    25.681
qmin           14.687    14.732    14.775
qmax          122.927   121.541   123.357
amean          66.569    66.903    67.525
amin           64.613    65.964    65.810
amax           68.985    68.286    69.241
emean           0.773     0.774     0.775
emin            0.767     0.768     0.767
emax            0.782     0.780     0.784
imean          23.971    24.049    23.927
imin           23.413    23.681    23.382
imax           24.402    24.431    24.408
excite_mean     0.873     0.875     0.875
fracstop        0.012     0.009     0.012
cjmean          2.181     2.179     2.181

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       292.6     291.6     292.4
kozaiamp          4.1       2.7       3.9