Orbit Fit and Astrometric record for 03QA112

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: 03QA112   
# Created Sun Oct 22 01:37:25 2017
# Orbit generated from Bernstein formalism
# Fitting   17 observations of   17
# Arc:   6.14y
# First observation: 2003/08/26
#  Last observation: 2009/10/15
Preliminary a, adot, b, bdot, g, gdot:
  -0.000116   0.017993  -0.000025   0.004899   0.021323   0.000000
# Chi-squared of fit:    53.97 DOF:   28 RMS:  0.31
# Min/Max residuals:    -0.54    0.66
# Exact a, adot, b, bdot, g, gdot:
  1.161975E-05  1.805259E-02  3.902780E-06  4.913339E-03  2.165347E-02  1.018441E-03
# Covariance matrix:
  2.3573E-13 -1.9690E-13  9.0451E-15 -4.8771E-14  1.4356E-14 -1.5839E-12
 -1.9690E-13  9.7890E-13 -6.2384E-14  2.8859E-13  1.5651E-13  9.3331E-12
  9.0451E-15 -6.2384E-14  2.0760E-13 -5.3022E-14 -2.0879E-14 -5.9593E-13
 -4.8771E-14  2.8859E-13 -5.3022E-14  9.6306E-14  4.3596E-14  2.7822E-12
  1.4356E-14  1.5651E-13 -2.0879E-14  4.3596E-14  3.3570E-13  1.3592E-12
 -1.5839E-12  9.3331E-12 -5.9593E-13  2.7822E-12  1.3592E-12  9.0001E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -5.211282  -17.210706    0.181641   -0.090635   -0.994389  2452877.772713
# Heliocentric elements and errors
Epoch:              2452870.5000  =  2003/08/19
Mean Anomaly:          152.93234 +/-     0.219
Argument of Peri:      182.73166 +/-     0.214
Long of Asc Node:        0.64772 +/-     0.000
Inclination:            16.05107 +/-     0.000
Eccentricity:         0.12117599 +/-    0.0001
Semi-Major Axis:     42.47792050 +/-    0.0059
Time of Perihelion: 2409912.8866 +/-      60.7
Perihelion:          37.33061632 +/-    0.0069
Aphelion:            47.62522468 +/-    0.0080
Period (y)              276.8554 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           44.82913983 +/-    0.0012
Ecliptic Y          -14.07297148 +/-    0.0004
Ecliptic Z           -4.19448556 +/-    0.0001
Ecliptic XDOT         0.00084653 +/-    0.0000
Ecliptic YDOT         0.00211998 +/-    0.0000
Ecliptic ZDOT         0.00060715 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   47.17302209 +/-    0.0011
Geocenter to KBO     46.18196409 +/-    0.0012
# Hcoef:  5.95

The following table shows the complete astrometric record for 03QA112. 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 (03QA112) followed by the observatory code and reference code for the source of the astrometry.

2003 08  26.27197  23 04 40.32   -11 34 07.6   21.5R 03QA112   807  Ci4592      
2003 08  26.36752  23 04 39.92   -11 34 09.7         03QA112   807  Ci4592      
2003 09  03.09799  23 04 07.67   -11 37 11.4   22.3R 03QA112   304  Ci4592      
2003 09  03.17448  23 04 07.34   -11 37 13.2         03QA112   304  Ci4592      
2003 11  20.08134  23 00 08.08   -11 52 30.8   22.7R 03QA112   695  Cj4700      
2003 11  22.08697  23 00 06.73   -11 52 18.8         03QA112   695  Cj4700      
2004 05  28.30263  23 10 46.50   -10 34 41.7   22.8R 03QA112   304  C~09at      
2004 05  28.43256  23 10 46.67   -10 34 40.6         03QA112   304  C~09at      
2009 08  20.39468  23 25 18.36   -07 33 19.2   22.6R 03QA112   688  C~09au      
2009 08  20.43944  23 25 18.21   -07 33 20.5         03QA112   688  C~09au      
2009 09  17.32882  23 23 25.59   -07 44 08.8   22.3R 03QA112   688  C~09au      
2009 09  17.38050  23 23 25.37   -07 44 10.2         03QA112   688  C~09au      
2009 09  18.31507  23 23 21.50   -07 44 31.4   22.3R 03QA112   688  C~09au      
2009 09  18.37524  23 23 21.22   -07 44 32.6         03QA112   688  C~09au      
2009 10  15.161086 23 21 38.06   -07 53 18.9         03QA112   645  C~1Q3G      
2009 10  15.161915 23 21 38.06   -07 53 18.8         03QA112   645  C~1Q3G      
2009 10  15.164403 23 21 38.05   -07 53 18.8         03QA112   645  C~1Q3G      

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     0.32       0.00    -0.06
  2   0.0003     -6.23     0.36       0.34     0.08
  3   0.0214   -513.49    -0.41      16.54     0.13
  4   0.0216   -518.66    -0.46      16.75     0.13
  5   0.2349  -4114.94     0.06     525.76    -0.06
  6   0.2404  -4128.63     0.09     544.46     0.01
  7   0.7557   6356.60    -0.10    1180.04    -0.38
  8   0.7561   6359.34     0.15    1180.07     0.09
  9   5.9853  22624.68    -0.44    6061.84     0.47
 10   5.9854  22622.09    -0.26    6061.54     0.08
 11   6.0618  20807.80     0.66    6136.80     0.31
 12   6.0619  20804.20     0.52    6136.82     0.11
 13   6.0645  20742.36     0.35    6140.36     0.09
 14   6.0646  20738.02     0.03    6140.92     0.40
 15   6.1380  19106.83    -0.35    6269.95    -0.54
 16   6.1380  19106.87    -0.26    6270.05    -0.45
 17   6.1380  19106.73    -0.27    6270.10    -0.41

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.

03QA112    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        42.819    42.836    42.801
ecceobj         0.112     0.113     0.112
incobj         15.968    15.968    15.968
qmin           36.570    36.608    36.545
qmax           49.141    49.214    49.124
amean          42.726    42.749    42.701
amin           42.374    42.378    42.339
amax           43.116    43.145    43.083
emean           0.124     0.124     0.124
emin            0.108     0.109     0.107
emax            0.141     0.141     0.141
imean          16.000    16.001    16.004
imin           15.209    15.220    15.209
imax           16.654    16.645    16.643
excite_mean     0.302     0.303     0.302
fracstop        1.000     1.000     1.000
cjmean          2.976     2.976     2.976

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       184.2     183.4     186.1
kozaiamp        180.0     179.9     180.0