Orbit Fit and Astrometric record for 03QJ91

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: 03QJ91    
# Created Sat Dec 15 02:08:42 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   17 observations of   17
# Arc:  11.16y
# First observation: 2003/08/24
#  Last observation: 2014/10/22
# Chi-squared of fit:    47.59 DOF:   28 RMS:  0.30
# Min/Max residuals:    -0.41    0.79
# Exact a, adot, b, bdot, g, gdot:
  1.632885E-05  2.120154E-02 -1.070227E-06 -5.615560E-04  2.278205E-02 -9.221080E-04
# Covariance matrix:
  2.7277E-13 -6.6363E-14 -3.1091E-15  1.2497E-15  2.5659E-13 -2.5567E-13
 -6.6363E-14  1.0157E-13  1.2870E-15 -2.5871E-15  1.1120E-13  3.9603E-13
 -3.1091E-15  1.2870E-15  1.5880E-13 -1.7467E-14 -7.1304E-15  6.7935E-15
  1.2497E-15 -2.5871E-15 -1.7467E-14  4.5596E-15 -3.1535E-15 -1.0520E-14
  2.5659E-13  1.1120E-13 -7.1304E-15 -3.1535E-15  1.2207E-12  2.5757E-13
 -2.5567E-13  3.9603E-13  6.7935E-15 -1.0520E-14  2.5757E-13  1.6508E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.025018  -43.728583   -0.246903   -0.034761   -0.984335  2452875.553633
# Heliocentric elements and errors
Epoch:              2452876.5000  =  2003/08/25
Mean Anomaly:          245.65376 +/-     0.187
Argument of Peri:      351.47845 +/-     0.168
Long of Asc Node:       83.82026 +/-     0.004
Inclination:             2.48728 +/-     0.000
Eccentricity:         0.04247010 +/-    0.0001
Semi-Major Axis:     44.03938601 +/-    0.0079
Time of Perihelion: 2486782.7449 +/-      58.9
Perihelion:          42.16902906 +/-    0.0084
Aphelion:            45.90974295 +/-    0.0090
Period (y)              292.2605 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           32.57923194 +/-    0.0015
Ecliptic Y          -30.82089576 +/-    0.0015
Ecliptic Z           -1.55109016 +/-    0.0001
Ecliptic XDOT         0.00167421 +/-    0.0000
Ecliptic YDOT         0.00191366 +/-    0.0000
Ecliptic ZDOT        -0.00006335 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.87473724 +/-    0.0015
Geocenter to KBO     43.89428073 +/-    0.0021
# Hcoef:  6.73

The following table shows the complete astrometric record for 03QJ91. 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 (03QJ91) followed by the observatory code and reference code for the source of the astrometry.

2003 08  24.05289  21 17 27.49   -17 53 28.0   22.4R 03QJ91    807  Ci4137      
2003 08  25.06814  21 17 23.06   -17 53 47.6         03QJ91    807  Ci4137      
2003 08  25.15384  21 17 22.68   -17 53 49.3         03QJ91    807  Ci4137      
2003 08  26.20107  21 17 18.15   -17 54 09.3         03QJ91    807  Ci4137      
2003 10  01.27074  21 15 10.26   -18 02 56.8   22.7R 03QJ91    568  Ci6964      
2003 10  02.25084  21 15 07.87   -18 03 05.4         03QJ91    568  Ci6964      
2003 10  02.33532  21 15 07.65   -18 03 06.5         03QJ91    568  Ci6964      
2006 08  21.17719  21 32 18.23   -16 49 56.9   22.0R 03QJ91    807  Ct0451      
2006 08  21.26808  21 32 17.83   -16 49 58.8         03QJ91    807  Ct0451      
2006 10  19.10013  21 29 06.81   -17 03 43.7   23.6R 03QJ91    695  Ct0451      
2006 10  20.10237  21 29 05.52   -17 03 47.3         03QJ91    695  Ct0451      
2006 10  20.21783  21 29 05.37   -17 03 47.7         03QJ91    695  Ct0452      
2014 09  26.17168  22 08 33.59   -13 55 44.0   23.4R 03QJ91    695  C~1LJE      
2014 09  26.23310  22 08 33.29   -13 55 45.1         03QJ91    695  C~1LJE      
2014 09  26.29280  22 08 33.10   -13 55 46.4         03QJ91    695  C~1LJE      
2014 10  22.09851  22 07 21.71   -14 01 16.4   23.4R 03QJ91    G37  C~1BxD      
2014 10  22.20693  22 07 21.48   -14 01 17.1         03QJ91    G37  C~1BxD      

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    -0.38       0.00     0.03
  2   0.0028      0.00    -0.39       0.00    -0.00
  3   0.0030      0.00    -0.41       0.00    -0.05
  4   0.0059      0.00    -0.20       0.00    -0.06
  5   0.1046      0.00     0.50       0.00    -0.05
  6   0.1073      0.00     0.57       0.00     0.09
  7   0.1075      0.00     0.42       0.00    -0.28
  8   2.9928      0.00     0.32       0.00     0.09
  9   2.9931      0.00     0.47       0.00     0.12
 10   3.1541      0.00    -0.26       0.00     0.12
 11   3.1569      0.00    -0.31       0.00     0.08
 12   3.1572      0.00    -0.29       0.00     0.05
 13  11.0914      0.00     0.79       0.00     0.03
 14  11.0915      0.00    -0.37       0.00     0.01
 15  11.0917      0.00     0.02       0.00    -0.23
 16  11.1623      0.00    -0.04       0.00    -0.01
 17  11.1626      0.00    -0.35       0.00     0.09

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.

03QJ91    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.361    44.360    44.361
ecceobj         0.043     0.043     0.043
incobj          2.489     2.489     2.489
qmin           41.363    41.371    41.363
qmax           47.508    47.511    47.511
amean          44.317    44.317    44.317
amin           43.975    43.972    43.972
amax           44.683    44.681    44.683
emean           0.048     0.048     0.048
emin            0.032     0.032     0.032
emax            0.063     0.064     0.063
imean           0.921     0.921     0.921
imin            0.200     0.200     0.200
imax            1.450     1.449     1.450
excite_mean     0.051     0.051     0.051
fracstop        1.000     1.000     1.000
cjmean          3.102     3.102     3.102

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       164.7     164.6     164.6
kozaiamp        179.9     180.0     180.0