Orbit Fit and Astrometric record for 149560

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: 149560    
# Created Tue Apr 23 01:06:49 2019
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   17 observations of   17
# Arc:   2.94y
# First observation: 2003/08/24
#  Last observation: 2006/08/03
# Chi-squared of fit:   124.82 DOF:   28 RMS:  0.48
# Min/Max residuals:    -0.78    0.82
# Exact a, adot, b, bdot, g, gdot:
  1.999596E-05  5.151529E-02 -1.306058E-05 -3.553477E-02  4.274246E-02  1.641301E-02
# Covariance matrix:
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
#      lat0       lon0       xBary       yBary       zBary        JD0
   -3.417666  -45.067726   -0.269651   -0.058318   -0.977228  2452875.541333
# Heliocentric elements and errors
Epoch:              2452876.5000  =  2003/08/25
Mean Anomaly:           16.51788 +/-     0.000
Argument of Peri:      137.11675 +/-     0.000
Long of Asc Node:      130.85219 +/-     0.000
Inclination:            34.88292 +/-     0.000
Eccentricity:         0.47457964 +/-    0.0000
Semi-Major Axis:     41.32100228 +/-    0.0000
Time of Perihelion: 2448424.9978 +/-       0.0
Perihelion:          21.71089600 +/-    0.0000
Aphelion:            60.93110855 +/-    0.0000
Period (y)              265.6223 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           17.37429007 +/-    0.0000
Ecliptic Y          -17.03214835 +/-    0.0000
Ecliptic Z           -1.39503675 +/-    0.0000
Ecliptic XDOT         0.00297617 +/-    0.0000
Ecliptic YDOT         0.00167793 +/-    0.0000
Ecliptic ZDOT        -0.00233462 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   24.37004449 +/-    0.0000
Geocenter to KBO     23.39583399 +/-    0.0000
# Hcoef:  7.78

The following table shows the complete astrometric record for 149560. 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 (149560) followed by the observatory code and reference code for the source of the astrometry.

2003 08  24.04059  21 13 50.03   -19 37 15.7   20.7R 149560    807  Ci4137      
2003 08  24.14712  21 13 49.23   -19 37 21.1         149560    807  Ci4137      
2003 08  25.05638  21 13 42.54   -19 38 07.3         149560    807  Ci4137      
2003 10  02.24064  21 10 03.50   -20 03 47.2   22.3R 149560    568  Ci6964      
2003 10  02.35859  21 10 03.08   -20 03 50.4         149560    568  Ci6964      
2004 08  12.13921  21 29 36.46   -20 27 57.8   20.8R 149560    807  Cp9888      
2004 08  12.24922  21 29 35.60   -20 28 03.9         149560    807  Cp9888      
2005 12  01.08797  21 38 21.25   -21 58 14.3   21.6R 149560    695  Cp9888      
2005 12  02.06934  21 38 26.21   -21 57 50.8         149560    695  Cp9888      
2005 12  02.09457  21 38 26.34   -21 57 50.3         149560    695  Cp9888      
2006 04  26.39761  22 00 46.69   -20 50 19.6         149560    807  Cr3580      
2006 04  27.40990  22 00 52.35   -20 50 28.3         149560    807  Cr3580      
2006 04  28.40019  22 00 57.78   -20 50 37.3         149560    807  Cr3580      
2006 08  03.49795  21 58 27.74   -22 01 10.7   21.8R 149560    250  S~06He      
2006 08  03.50235  21 58 27.70   -22 01 11.1         149560    250  S~06He      
2006 08  03.50674  21 58 27.67   -22 01 11.3         149560    250  S~06He      
2006 08  03.51114  21 58 27.64   -22 01 11.6         149560    250  S~06He      

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    -0.07
  2   0.0003      0.00    -0.16       0.00    -0.01
  3   0.0028      0.00    -0.10       0.00     0.02
  4   0.1073      0.00     0.17       0.00     0.52
  5   0.1076      0.00     0.33       0.00     0.59
  6   0.9695      0.00     0.33       0.00    -0.34
  7   0.9698      0.00     0.24       0.00    -0.32
  8   2.2725      0.00    -0.26       0.00    -0.58
  9   2.2752      0.00    -0.52       0.00    -0.57
 10   2.2753      0.00    -0.47       0.00    -0.69
 11   2.6731      0.00    -0.21       0.00    -0.55
 12   2.6759      0.00    -0.29       0.00    -0.78
 13   2.6786      0.00     0.08       0.00    -0.63
 14   2.9444      0.00     0.59       0.00     0.82
 15   2.9445      0.00     0.45       0.00     0.69
 16   2.9445      0.00     0.46       0.00     0.75
 17   2.9445      0.00     0.48       0.00     0.72

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.

149560    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        41.537    41.538    41.537
ecceobj         0.476     0.476     0.476
incobj         34.819    34.819    34.819
qmin           20.160    20.409    20.350
qmax           64.651    63.771    69.125
amean          41.895    41.280    42.978
amin           40.666    39.146    40.606
amax           43.686    42.233    45.105
emean           0.482     0.493     0.501
emin            0.385     0.470     0.434
emax            0.520     0.510     0.534
imean          33.086    32.109    32.661
imin           31.189    31.581    31.367
imax           37.835    33.480    36.637
excite_mean     0.729     0.725     0.737
fracstop        0.179     0.077     0.174
cjmean          2.456     2.464     2.449

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       197.2     163.1     196.4
kozaiamp         51.3      28.5      54.7