Orbit Fit and Astrometric record for 03QC112

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: 03QC112   
# Created Tue Nov 20 02:08:18 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   12 observations of   12
# Arc:   6.07y
# First observation: 2003/08/24
#  Last observation: 2009/09/18
# Chi-squared of fit:    13.41 DOF:   18 RMS:  0.19
# Min/Max residuals:    -0.47    0.34
# Exact a, adot, b, bdot, g, gdot:
  1.730002E-05  4.070475E-02 -5.176871E-06 -1.334957E-02  4.036809E-02  4.975034E-03
# Covariance matrix:
  4.1402E-13 -5.4685E-13 -4.0278E-14  1.8195E-13  3.6620E-13 -2.1967E-12
 -5.4685E-13  1.7741E-12  1.3311E-13 -6.1707E-13 -3.5778E-13  7.4566E-12
 -4.0278E-14  1.3311E-13  1.7306E-13 -7.8596E-14 -3.0034E-14  5.6749E-13
  1.8195E-13 -6.1707E-13 -7.8596E-14  2.4277E-13  1.2669E-13 -2.6308E-12
  3.6620E-13 -3.5778E-13 -3.0034E-14  1.2669E-13  7.5796E-13 -1.5257E-12
 -2.1967E-12  7.4566E-12  5.6749E-13 -2.6308E-12 -1.5257E-12  3.1790E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.856335  -15.364966    0.247027   -0.031847   -0.984361  2452875.770213
# Heliocentric elements and errors
Epoch:              2452876.5000  =  2003/08/25
Mean Anomaly:          152.78851 +/-     0.033
Argument of Peri:       21.86543 +/-     0.024
Long of Asc Node:      158.67913 +/-     0.000
Inclination:            18.28930 +/-     0.000
Eccentricity:         0.27815769 +/-    0.0001
Semi-Major Axis:     20.45625539 +/-    0.0019
Time of Perihelion: 2438533.9680 +/-       3.7
Perihelion:          14.76619067 +/-    0.0018
Aphelion:            26.14632011 +/-    0.0027
Period (y)               92.5225 +/-      0.01
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           24.75561073 +/-    0.0005
Ecliptic Y           -7.05543536 +/-    0.0002
Ecliptic Z           -0.80259792 +/-    0.0000
Ecliptic XDOT         0.00102314 +/-    0.0000
Ecliptic YDOT         0.00257470 +/-    0.0000
Ecliptic ZDOT        -0.00091568 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   25.75386080 +/-    0.0005
Geocenter to KBO     24.77203174 +/-    0.0005
# Hcoef:  8.48

The following table shows the complete astrometric record for 03QC112. 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 (03QC112) followed by the observatory code and reference code for the source of the astrometry.

2003 08  24.26947  23 06 17.37   -07 45 44.1   21.8R 03QC112   807  Ci4592      
2003 08  24.36129  23 06 16.76   -07 45 48.7         03QC112   807  Ci4592      
2003 09  03.10301  23 05 07.92   -07 54 24.7   22.6R 03QC112   304  Ci4592      
2003 09  03.17936  23 05 07.37   -07 54 29.3         03QC112   304  Ci4592      
2003 10  22.13867  22 59 53.62   -08 32 03.6   22.7R 03QC112   695  Cj4700      
2003 10  22.21847  22 59 53.24   -08 32 06.3         03QC112   695  Cj4700      
2003 10  23.12160  22 59 49.17   -08 32 34.9         03QC112   304  Ci9432      
2003 10  23.14826  22 59 49.02   -08 32 35.6         03QC112   304  Ci9432      
2004 08  13.17600  23 17 12.68   -07 24 46.6   21.6R 03QC112   807  C~2i4D      
2004 08  13.28230  23 17 12.00   -07 24 51.8         03QC112   807  C~2i4D      
2009 09  18.33000  00 01 17.68   -06 45 24.3   22.5R 03QC112   688  C~2i4D      
2009 09  18.36047  00 01 17.47   -06 45 25.8         03QC112   688  C~2i4D      

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    -0.12
  2   0.0003      0.00     0.27       0.00     0.09
  3   0.0269      0.00     0.05       0.00     0.06
  4   0.0271      0.00     0.16       0.00    -0.47
  5   0.1612      0.00    -0.17       0.00     0.06
  6   0.1614      0.00    -0.22       0.00    -0.03
  7   0.1639      0.00     0.30       0.00     0.19
  8   0.1639      0.00    -0.11       0.00     0.34
  9   0.9717      0.00     0.13       0.00    -0.10
 10   0.9720      0.00    -0.08       0.00     0.02
 11   6.0700      0.00    -0.07       0.00    -0.07
 12   6.0701      0.00     0.06       0.00     0.07

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.

03QC112    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        20.554    20.554    20.554
ecceobj         0.272     0.272     0.272
incobj         18.216    18.216    18.216
qmin           14.816    14.816    14.816
qmax           26.436    26.436    26.436
amean          20.594    20.471    20.627
amin           20.427    19.967    20.444
amax           20.740    20.709    20.976
emean           0.250     0.248     0.259
emin            0.211     0.202     0.221
emax            0.279     0.279     0.279
imean          17.706    17.916    17.557
imin           17.167    17.168    17.167
imax           18.410    19.130    18.474
excite_mean     0.394     0.396     0.398
fracstop        0.008     0.007     0.006
cjmean          2.990     2.993     2.987

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        60.6      61.7      55.1
kozaiamp         31.0      38.5      31.6