Orbit Fit and Astrometric record for 03QS91

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: 03QS91    
# Created Fri Dec 15 02:37:14 2017
# Orbit generated from Bernstein formalism
# Fitting   11 observations of   13
# Arc:  10.93y
# First observation: 2003/08/25
#  Last observation: 2014/07/29
Preliminary a, adot, b, bdot, g, gdot:
  -0.000359   0.028062   0.000017  -0.001313   0.025324   0.000000
# Chi-squared of fit:     7.99 DOF:   16 RMS:  0.15
# Min/Max residuals:    -0.36    0.34
# Exact a, adot, b, bdot, g, gdot:
  1.707007E-05  2.683672E-02 -1.473079E-07 -1.262213E-03  2.553161E-02 -1.591870E-03
# Covariance matrix:
  3.4255E-13 -3.3724E-13 -6.5150E-16  1.3551E-14  2.6166E-13 -9.3259E-13
 -3.3724E-13  1.2050E-12  1.2779E-14 -5.4308E-14 -4.1009E-14  3.6951E-12
 -6.5150E-16  1.2779E-14  1.7415E-13 -1.8040E-14  7.8759E-15  4.1212E-14
  1.3551E-14 -5.4308E-14 -1.8040E-14  9.6990E-15 -9.9872E-16 -1.6815E-13
  2.6166E-13 -4.1009E-14  7.8759E-15 -9.9872E-16  7.5646E-13  3.6139E-14
 -9.3259E-13  3.6951E-12  4.1212E-14 -1.6815E-13  3.6139E-14  1.1434E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.766260  -29.112033   -0.010102    0.049043   -1.013926  2452876.711283
# Heliocentric elements and errors
Epoch:              2452870.5000  =  2003/08/19
Mean Anomaly:          338.07635 +/-     0.053
Argument of Peri:      163.91833 +/-     0.072
Long of Asc Node:      195.84203 +/-     0.002
Inclination:             3.81508 +/-     0.000
Eccentricity:         0.13831461 +/-    0.0001
Semi-Major Axis:     45.91951910 +/-    0.0087
Time of Perihelion: 2459792.0730 +/-      16.7
Perihelion:          39.56817861 +/-    0.0090
Aphelion:            52.27085958 +/-    0.0111
Period (y)              311.1746 +/-      0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           35.06857738 +/-    0.0012
Ecliptic Y          -19.51418913 +/-    0.0007
Ecliptic Z            1.89025020 +/-    0.0001
Ecliptic XDOT         0.00125160 +/-    0.0000
Ecliptic YDOT         0.00258830 +/-    0.0000
Ecliptic ZDOT        -0.00014326 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.17688070 +/-    0.0011
Geocenter to KBO     39.16714087 +/-    0.0013
# Hcoef:  7.41

The following table shows the complete astrometric record for 03QS91. 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 (03QS91) followed by the observatory code and reference code for the source of the astrometry.

2003 08  25.21054  22 07 47.08   -08 34 12.8   22.4R 03QS91    807  Ci4137      
2003 08  25.31519  22 07 46.60   -08 34 15.3         03QS91    807  Ci4137      
2003 08  26.18847  22 07 42.50   -08 34 39.0         03QS91    807  Ci4137      
2003 10  01.32926  22 05 09.69   -08 50 11.5   23.9R 03QS91    568  Ci6964      
2003 10  01.38409  22 05 09.48   -08 50 12.6         03QS91    568  Ci6964      
2003 10  24.10892  22 04 10.29   -08 57 14.6   23.1R 03QS91    695  Cj4699      
2003 10  24.23668  22 04 10.07   -08 57 16.5         03QS91    695  Cj4699      
2004 07  17.19796  22 16 25.35   -07 50 38.8   22.3R 03QS91    807  Cl8405      
2004 07  17.29984  22 16 24.98   -07 50 40.8         03QS91    807  Cl8405      
2004 10  11.16468  22 10 29.28   -08 25 48.3   23.9R 03QS91    695  Cl8405      
2004 10  11.26623  22 10 29.01   -08 25 51.1         03QS91    695  Cl8405      
2014 07  29.38896  23 14 50.59   -02 50 40.6   23.2R 03QS91    G37  C~16aI      
2014 07  29.43695  23 14 50.43   -02 50 41.5         03QS91    G37  C~16aI      

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    -0.09       0.00    -0.13
  2   0.0003     -7.54     0.26       0.16     0.07
  3   0.0027    -72.81    -0.08      -0.66     0.05
  4   0.1016  -2521.78     0.14     -79.55    -0.36
  5   0.1018  -2525.08    -0.06     -79.49    -0.15
  6   0.1640  -3494.64    -0.11    -168.31     0.22
  7   0.1643  -3498.36    -0.08    -168.95     0.09
  8   0.8952   8125.68 (   0.07)   -279.27 (   0.46)
  9   0.8955   8119.82    -0.07    -279.18     0.34
 10   1.1306   2429.86 (   0.06)   -375.51 (   0.76)
 11   1.1309   2425.13     0.08    -376.72    -0.10
 12  10.9273  65479.91     0.03   -2980.20    -0.03
 13  10.9274  65477.09    -0.03   -2980.11     0.01

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.

03QS91    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        46.402    46.428    46.375
ecceobj         0.147     0.148     0.147
incobj          3.805     3.805     3.805
qmin           38.743    38.802    38.759
qmax           53.971    54.153    53.969
amean          46.209    46.235    46.190
amin           45.812    45.842    45.804
amax           46.654    46.695    46.635
emean           0.145     0.145     0.145
emin            0.131     0.132     0.131
emax            0.158     0.160     0.158
imean           4.677     4.675     4.678
imin            4.077     4.077     4.076
imax            5.277     5.266     5.276
excite_mean     0.166     0.166     0.166
fracstop        1.000     1.000     1.000
cjmean          3.094     3.095     3.094

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       182.2     181.9     182.3
kozaiamp        180.0     180.0     179.9