Orbit Fit and Astrometric record for 03QE91

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: 03QE91    
# Created Wed Dec 13 02:37:16 2017
# Orbit generated from Bernstein formalism
# Fitting   16 observations of   16
# Arc:  11.09y
# First observation: 2003/08/23
#  Last observation: 2014/09/26
Preliminary a, adot, b, bdot, g, gdot:
  -0.000543   0.025154  -0.000033   0.001194   0.025053   0.000000
# Chi-squared of fit:    47.65 DOF:   26 RMS:  0.31
# Min/Max residuals:    -0.63    0.58
# Exact a, adot, b, bdot, g, gdot:
  1.629470E-05  2.483155E-02  2.642940E-07  1.180272E-03  2.488083E-02  6.682490E-04
# Covariance matrix:
  2.6773E-13 -1.1172E-13  4.7487E-15 -4.5716E-15  4.0933E-14 -3.3966E-13
 -1.1172E-13  9.3839E-14 -4.9436E-15  4.2708E-15  4.0358E-14  3.1548E-13
  4.7487E-15 -4.9436E-15  1.5853E-13 -2.2943E-14 -4.0437E-15 -1.7840E-14
 -4.5716E-15  4.2708E-15 -2.2943E-14  7.9770E-15  1.2681E-15  1.5772E-14
  4.0933E-14  4.0358E-14 -4.0437E-15  1.2681E-15  4.1102E-13  8.4400E-14
 -3.3966E-13  3.1548E-13 -1.7840E-14  1.5772E-14  8.4400E-14  1.1666E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.218860  -24.528655    0.106183   -0.039062   -1.009327  2452874.642723
# Heliocentric elements and errors
Epoch:              2452870.5000  =  2003/08/19
Mean Anomaly:           31.22181 +/-     0.060
Argument of Peri:      287.53174 +/-     0.066
Long of Asc Node:       13.78002 +/-     0.002
Inclination:             3.47831 +/-     0.000
Eccentricity:         0.04377766 +/-    0.0001
Semi-Major Axis:     42.77477605 +/-    0.0045
Time of Perihelion: 2444008.4201 +/-      17.0
Perihelion:          40.90219642 +/-    0.0054
Aphelion:            44.64735568 +/-    0.0057
Period (y)              279.7627 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           37.40933429 +/-    0.0009
Ecliptic Y          -17.18466206 +/-    0.0004
Ecliptic Z           -1.55608161 +/-    0.0000
Ecliptic XDOT         0.00120051 +/-    0.0000
Ecliptic YDOT         0.00244753 +/-    0.0000
Ecliptic ZDOT         0.00012710 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.19699373 +/-    0.0009
Geocenter to KBO     40.19158038 +/-    0.0010
# Hcoef:  7.24

The following table shows the complete astrometric record for 03QE91. 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 (03QE91) followed by the observatory code and reference code for the source of the astrometry.

2003 08  23.14198  22 32 27.12   -11 34 05.6   22.5R 03QE91    807  Ci4137      
2003 08  23.21118  22 32 26.76   -11 34 07.2         03QE91    807  Ci4137      
2003 08  24.22582  22 32 22.11   -11 34 34.2         03QE91    807  Ci4137      
2003 10  23.01853  22 28 26.19   -11 55 14.2   23.4R 03QE91    304  Ci9429      
2003 10  23.06236  22 28 26.08   -11 55 14.6         03QE91    304  Ci9429      
2004 07  17.21052  22 40 07.79   -10 44 00.2   22.7R 03QE91    807  Cs2453      
2004 07  17.31127  22 40 07.52   -10 44 02.0         03QE91    807  Cs2453      
2006 08  21.18903  22 48 18.37   -09 46 18.9   22.6R 03QE91    807  Cs2453      
2006 08  22.21960  22 48 13.72   -09 46 46.3         03QE91    807  Cs2453      
2006 08  23.14697  22 48 09.59   -09 47 11.7         03QE91    807  Cs2453      
2006 08  23.21392  22 48 09.26   -09 47 13.7         03QE91    807  Cs2453      
2006 10  19.12417  22 44 13.73   -10 09 11.0   23.3R 03QE91    695  Ct0451      
2006 10  19.21879  22 44 13.42   -10 09 11.9         03QE91    695  Ct0451      
2006 10  20.12660  22 44 10.83   -10 09 24.2         03QE91    695  Ct0451      
2014 09  26.28801  23 26 36.42   -05 07 49.3   23.9R 03QE91    695  C~1LJE      
2014 09  26.34456  23 26 36.14   -05 07 50.1         03QE91    695  C~1LJE      

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    -0.11       0.00     0.10
  2   0.0002     -5.51    -0.49       0.47     0.52
  3   0.0030    -78.98     0.18       0.61     0.26
  4   0.1667  -3757.28     0.10     121.45    -0.57
  5   0.1668  -3758.93     0.07     121.67    -0.52
  6   0.9009   7414.30    -0.18     264.40     0.22
  7   0.9012   7409.93     0.58     264.23     0.15
  8   2.9953  15452.38    -0.12     729.80    -0.06
  9   2.9982  15377.98    -0.24     730.67     0.46
 10   3.0007  15311.49     0.27     730.45    -0.09
 11   3.0009  15306.19    -0.11     730.46    -0.13
 12   3.1567  11571.12     0.05     833.05    -0.63
 13   3.1570  11566.52    -0.16     833.95    -0.06
 14   3.1594  11526.35     0.15     837.03     0.30
 15  11.0942  54638.54     0.04    2755.16    -0.40
 16  11.0943  54634.09    -0.04    2756.13     0.44

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.

03QE91    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.172    43.186    43.158
ecceobj         0.051     0.051     0.050
incobj          3.465     3.465     3.465
qmin           40.293    40.274    40.299
qmax           45.975    45.988    45.944
amean          43.031    43.045    43.018
amin           42.695    42.706    42.686
amax           43.377    43.390    43.358
emean           0.042     0.042     0.041
emin            0.020     0.021     0.022
emax            0.060     0.060     0.060
imean           3.188     3.189     3.186
imin            2.191     2.202     2.183
imax            4.119     4.117     4.119
excite_mean     0.070     0.070     0.069
fracstop        1.000     1.000     1.000
cjmean          3.084     3.084     3.084

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       192.2     191.8     192.2
kozaiamp        180.0     180.0     179.9