Orbit Fit and Astrometric record for 03QU91

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: 03QU91    
# Created Fri Oct 20 01:37:27 2017
# Orbit generated from Bernstein formalism
# Fitting    7 observations of    7
# Arc:  57.87d
# First observation: 2003/08/25
#  Last observation: 2003/10/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000003   0.041852   0.000002   0.012898   0.029721   0.000000
# WARNING Fitting with energy constraint
# Chi-squared of fit:     9.26 DOF:    9 RMS:  0.20
# Min/Max residuals:    -0.39    0.41
# Exact a, adot, b, bdot, g, gdot:
  1.276014E-05  2.278570E-02  9.542943E-06  1.290713E-02  2.665212E-02  1.638852E-02
# Covariance matrix:
  1.1151E-12  1.4494E-09 -2.3111E-14 -4.7273E-12  2.2671E-10 -4.4729E-09
  1.4494E-09  3.7033E-06 -4.9449E-11 -1.8458E-08  5.6661E-07 -1.4606E-05
 -2.3111E-14 -4.9449E-11  4.9767E-13 -3.1952E-12 -7.9068E-12  9.8918E-11
 -4.7273E-12 -1.8458E-08 -3.1952E-12  2.5903E-10 -2.5934E-09  1.3783E-07
  2.2671E-10  5.6661E-07 -7.9068E-12 -2.5934E-09  8.7102E-08 -2.1194E-06
 -4.4729E-09 -1.4606E-05  9.8918E-11  1.3783E-07 -2.1194E-06  9.0120E-05
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.627806   -4.948512    0.403776    0.026523   -0.930966  2452876.870633
# Heliocentric elements and errors
Epoch:              2452870.5000  =  2003/08/19
Mean Anomaly:           30.14380 +/-    25.222
Argument of Peri:      268.07183 +/-     6.495
Long of Asc Node:      351.64448 +/-     0.235
Inclination:            29.49508 +/-     2.003
Eccentricity:         0.58258604 +/-    0.3345
Semi-Major Axis:     55.15802518 +/-   29.3060
Time of Perihelion: 2440341.7706 +/-    3193.1
Perihelion:          23.02372992 +/-   22.1361
Aphelion:            87.29232044 +/-   49.9140
Period (y)              409.6578 +/-    326.48
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           38.25577989 +/-    0.4138
Ecliptic Y           -3.71373929 +/-    0.0358
Ecliptic Z            1.06616607 +/-    0.0118
Ecliptic XDOT         0.00183570 +/-    0.0010
Ecliptic YDOT         0.00218431 +/-    0.0002
Ecliptic ZDOT         0.00137335 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.45040006 +/-    0.4117
Geocenter to KBO     37.52046478 +/-    0.4155
# Hcoef:  7.14

The following table shows the complete astrometric record for 03QU91. 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 (03QU91) followed by the observatory code and reference code for the source of the astrometry.

2003 08  25.36989  23 39 15.03   -00 28 18.8   22.1R 03QU91    807  Ci4137      
2003 08  26.29153  23 39 10.66   -00 28 38.4         03QU91    807  Ci4137      
2003 08  26.39615  23 39 10.11   -00 28 40.5         03QU91    807  Ci4137      
2003 10  19.20231  23 34 45.14   -00 50 23.5   23.4V 03QU91    645  C~2Jx8      
2003 10  19.20604  23 34 45.14   -00 50 23.5   23.2V 03QU91    645  C~2Jx8      
2003 10  22.16381  23 34 32.83   -00 51 24.8   22.8R 03QU91    695  Cj4699      
2003 10  22.24392  23 34 32.50   -00 51 26.6         03QU91    695  Cj4699      

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     0.16       0.00    -0.39
  2   0.0025    -67.95     0.19       7.98    -0.02
  3   0.0028    -76.35    -0.35       9.32     0.41
  4   0.1501  -4242.24    -0.13     387.68     0.04
  5   0.1501  -4242.24     0.12     387.68     0.02
  6   0.1582  -4436.14     0.02     404.53     0.06
  7   0.1585  -4441.40    -0.01     404.84    -0.12

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.

03QU91    quality flag:0

Type:      ERR2LARGE ERR2LARGE ERR2LARGE

axisobj         0.000     0.000     0.000
ecceobj        -1.000    -1.000    -1.000
incobj         -1.000    -1.000    -1.000
qmin            0.000     0.000     0.000
qmax            0.000     0.000     0.000
amean           0.000     0.000     0.000
amin            0.000     0.000     0.000
amax            0.000     0.000     0.000
emean           0.000     0.000     0.000
emin            0.000     0.000     0.000
emax            0.000     0.000     0.000
imean           0.000     0.000     0.000
imin            0.000     0.000     0.000
imax            0.000     0.000     0.000
excite_mean     0.000     0.000     0.000
fracstop        0.000     0.000     0.000
cjmean          0.000     0.000     0.000

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         0.0       0.0       0.0
kozaiamp          0.0       0.0       0.0