Orbit Fit and Astrometric record for 03QD112

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: 03QD112   
# Created Sun Oct 21 01:08:12 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   18 observations of   18
# Arc:   5.23y
# First observation: 2002/08/20
#  Last observation: 2007/11/11
# Chi-squared of fit:    70.44 DOF:   30 RMS:  0.35
# Min/Max residuals:    -0.91    0.81
# Exact a, adot, b, bdot, g, gdot:
  3.366693E-05  2.128006E-01  1.240311E-05  5.503750E-02  1.048978E-01  1.083785E-01
# Covariance matrix:
  4.5351E-13 -3.4004E-13  4.1917E-14 -7.7783E-14  1.3046E-13 -4.2222E-13
 -3.4004E-13  6.5417E-13 -8.8274E-14  1.6011E-13  2.4742E-13  8.5299E-13
  4.1917E-14 -8.8274E-14  2.7019E-13 -1.1672E-13 -2.3535E-14 -1.3006E-13
 -7.7783E-14  1.6011E-13 -1.1672E-13  1.0205E-13  3.8321E-14  2.3716E-13
  1.3046E-13  2.4742E-13 -2.3535E-14  3.8321E-14  6.8201E-13  1.8475E-13
 -4.2222E-13  8.5299E-13 -1.3006E-13  2.3716E-13  1.8475E-13  1.2692E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -4.344513  -12.971632    0.347660   -0.072288   -0.950791  2452506.957063
# Heliocentric elements and errors
Epoch:              2452506.5000  =  2002/08/20
Mean Anomaly:           18.42798 +/-     0.002
Argument of Peri:      274.01221 +/-     0.002
Long of Asc Node:        0.61847 +/-     0.000
Inclination:            14.50909 +/-     0.000
Eccentricity:         0.58080769 +/-    0.0000
Semi-Major Axis:     18.96556484 +/-    0.0012
Time of Perihelion: 2450962.2333 +/-       0.2
Perihelion:           7.95021896 +/-    0.0006
Aphelion:            29.98091073 +/-    0.0020
Period (y)               82.5956 +/-      0.01
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           10.11400418 +/-    0.0001
Ecliptic Y           -2.68101715 +/-    0.0000
Ecliptic Z           -0.72202378 +/-    0.0000
Ecliptic XDOT         0.00409365 +/-    0.0000
Ecliptic YDOT         0.00475215 +/-    0.0000
Ecliptic ZDOT         0.00121829 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   10.48805196 +/-    0.0001
Geocenter to KBO      9.53296070 +/-    0.0001
# Hcoef: 10.69

The following table shows the complete astrometric record for 03QD112. 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 (03QD112) followed by the observatory code and reference code for the source of the astrometry.

2002 08  20.45632  23 19 06.68   -09 07 18.6   20.2R 03QD112   644  Ck9589      
2002 08  29.49175  23 16 48.46   -09 17 52.7   20.2R 03QD112   644  Ck9589      
2002 09  15.44024  23 12 15.04   -09 37 13.5   20.6R 03QD112   644  Ck9589      
2003 08  26.29534  23 53 52.95   -02 12 15.2   20.3R 03QD112   807  Ci4592      
2003 08  26.40006  23 53 51.56   -02 12 21.4         03QD112   807  Ci4592      
2003 09  03.13917  23 52 05.71   -02 20 33.3   21.3R 03QD112   304  Ci4592      
2003 09  03.26274  23 52 03.91   -02 20 42.3         03QD112   304  Ci4592      
2003 10  22.15454  23 40 35.22   -03 11 33.7   21.5R 03QD112   695  Cj4700      
2003 10  22.24844  23 40 34.13   -03 11 37.6         03QD112   695  Cj4700      
2003 12  17.21507  23 37 28.00   -03 03 49.7   22.0R 03QD112   568  Ck9589      
2003 12  17.25579  23 37 28.20   -03 03 47.2         03QD112   568  Ck9589      
2005 09  28.27787  00 41 21.30   +07 53 42.0   22.0r 03QD112   705  C~0nK9      
2005 09  28.278368 00 41 21.32   +07 53 41.5   21.5V 03QD112   645  C~262W      
2005 09  28.279198 00 41 21.30   +07 53 41.5   21.5V 03QD112   645  C~262W      
2005 09  28.28119  00 41 21.25   +07 53 41.2         03QD112   705  C~0nK9      
2005 09  28.281685 00 41 21.26   +07 53 41.2   22.3V 03QD112   645  C~262W      
2007 11  11.26234  01 14 23.00   +14 39 52.8   22.4R 03QD112   688  Cw6790      
2007 11  11.32366  01 14 22.32   +14 39 49.9         03QD112   688  Cw6790      

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     0.03       0.00    -0.91
  2   0.0247      0.00    -0.50       0.00     0.32
  3   0.0711      0.00     0.37       0.00     0.26
  4   1.0153      0.00    -0.24       0.00    -0.18
  5   1.0156      0.00    -0.07       0.00    -0.04
  6   1.0368      0.00     0.44       0.00     0.62
  7   1.0371      0.00     0.27       0.00    -0.19
  8   1.1710      0.00    -0.07       0.00     0.43
  9   1.1712      0.00    -0.19       0.00     0.47
 10   1.3245      0.00    -0.00       0.00     0.07
 11   1.3246      0.00    -0.13       0.00     0.02
 12   3.1070      0.00    -0.08       0.00     0.10
 13   3.1070      0.00     0.33       0.00    -0.36
 14   3.1070      0.00     0.20       0.00    -0.31
 15   3.1070      0.00    -0.15       0.00    -0.48
 16   3.1070      0.00     0.10       0.00    -0.45
 17   5.2260      0.00     0.13       0.00    -0.07
 18   5.2262      0.00    -0.35       0.00     0.81

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.

03QD112    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        19.100    19.100    19.100
ecceobj         0.583     0.583     0.583
incobj         14.492    14.492    14.492
qmin            7.934     7.934     7.934
qmax           37.788    33.667    32.312
amean          20.985    19.844    19.444
amin           18.928    18.932    18.924
amax           23.016    20.909    20.265
emean           0.613     0.595     0.587
emin            0.581     0.581     0.581
emax            0.643     0.610     0.595
imean          15.059    15.360    15.514
imin           14.601    14.846    14.846
imax           15.651    15.896    15.950
excite_mean     0.666     0.651     0.645
fracstop        0.001     0.000     0.001
cjmean          2.709     2.774     2.799

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       292.1     279.9     280.1
kozaiamp         16.8       6.1       6.0