Orbit Fit and Astrometric record for 03QF91

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: 03QF91    
# Created Thu Dec  9 02:09:35 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     19 observations of     19
# Arc:  18.11y
# First observation: 2003/08/23
#  Last observation: 2021/10/03
# Chi-squared of fit:    21.62 DOF:     32 RMS:  0.19
# Min/Max residuals:    -0.40    0.36
# Exact a, adot, b, bdot, g, gdot:
  1.537440E-05  2.405649E-02 -8.460514E-07  2.156391E-04  2.446199E-02  7.008709E-04
# Covariance matrix:
  2.0329E-13 -1.6710E-14 -9.6027E-16 -5.0566E-17  1.3365E-13 -2.2055E-14
 -1.6710E-14  3.9423E-14 -5.4395E-16  3.5989E-16  4.3464E-14  8.5714E-14
 -9.6027E-16 -5.4395E-16  1.3827E-13 -8.3713E-15 -3.0579E-15 -1.1580E-15
 -5.0566E-17  3.5989E-16 -8.3713E-15  1.0846E-15  4.7080E-16  8.0305E-16
  1.3365E-13  4.3464E-14 -3.0579E-15  4.7080E-16  3.7316E-13  8.9468E-14
 -2.2055E-14  8.5714E-14 -1.1580E-15  8.0305E-16  8.9468E-14  1.9180E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.174061  -16.331177    0.248654   -0.037309   -0.984027  2452874.670673
# Heliocentric elements and errors
Epoch:              2452874.5000  =  2003/08/23
Mean Anomaly:           45.00137 +/-     0.096
Argument of Peri:      235.75025 +/-     0.103
Long of Asc Node:       60.03011 +/-     0.002
Inclination:             2.18163 +/-     0.000
Eccentricity:         0.03052530 +/-    0.0000
Semi-Major Axis:     42.76321182 +/-    0.0041
Time of Perihelion: 2440106.3748 +/-      27.3
Perihelion:          41.45785214 +/-    0.0046
Aphelion:            44.06857149 +/-    0.0048
Period (y)              279.6493 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           40.07456367 +/-    0.0010
Ecliptic Y          -11.99794074 +/-    0.0003
Ecliptic Z           -1.55083271 +/-    0.0000
Ecliptic XDOT         0.00082793 +/-    0.0000
Ecliptic YDOT         0.00255582 +/-    0.0000
Ecliptic ZDOT         0.00002132 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.86078296 +/-    0.0009
Geocenter to KBO     40.87976487 +/-    0.0010
# Hcoef:  7.39

The following table shows the complete astrometric record for 03QF91. 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 (03QF91) followed by the observatory code and reference code for the source of the astrometry.

2003 08  23.16993  23 03 11.25   -08 25 42.6   22.5R 03QF91    807  Ci4137      
2003 08  23.23867  23 03 10.97   -08 25 44.9         03QF91    807  Ci4137      
2003 08  24.25771  23 03 06.51   -08 26 12.9         03QF91    807  Ci4137      
2003 10  22.13867  22 59 05.26   -08 49 59.2   23.7R 03QF91    695  Cj4699      
2003 10  22.21847  22 59 05.02   -08 50 00.2         03QF91    695  Cj4699      
2003 10  23.11946  22 59 02.41   -08 50 13.8   23.2R 03QF91    304  Ci9429      
2003 10  23.14623  22 59 02.32   -08 50 14.1         03QF91    304  Ci9429      
2004 07  16.34709  23 10 26.07   -07 38 35.1   22.8R 03QF91    807  Cl8405      
2004 07  16.39874  23 10 25.92   -07 38 36.3         03QF91    807  Cl8405      
2004 10  12.14227  23 04 40.48   -08 14 59.2   23.2R 03QF91    695  Cl8405      
2004 10  12.24748  23 04 40.09   -08 15 01.1         03QF91    695  Cl8405      
2014 10  22.15971  23 54 13.11   -02 45 55.7   23.9R 03QF91    G37  C~1BxD      
2014 10  22.26675  23 54 12.75   -02 45 57.8         03QF91    G37  C~1BxD      
2021 09  12.328030 00 31 27.260  +01 27 46.41  23.7G 03QF91    G37  C~553k      
2021 09  12.387900 00 31 27.006  +01 27 44.66        03QF91    G37  C~553k      
2021 09  12.448460 00 31 26.757  +01 27 43.24        03QF91    G37  C~553k      
2021 10  03.163600 00 29 56.579  +01 18 02.51  23.6G 03QF91    G37  C~553k      
2021 10  03.216730 00 29 56.329  +01 18 00.99        03QF91    G37  C~553k      
2021 10  03.269410 00 29 56.080  +01 17 59.60        03QF91    G37  C~553k      

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    -0.05       0.00     0.20
     2   0.0002      0.00     0.30       0.00    -0.20
     3   0.0030      0.00    -0.12       0.00    -0.05
     4   0.1642      0.00    -0.15       0.00     0.05
     5   0.1644      0.00    -0.15       0.00     0.27
     6   0.1669      0.00    -0.11       0.00     0.12
     7   0.1669      0.00    -0.28       0.00     0.22
     8   0.8985      0.00     0.22       0.00    -0.10
     9   0.8986      0.00    -0.13       0.00    -0.40
    10   1.1389      0.00     0.36       0.00    -0.17
    11   1.1392      0.00     0.26       0.00     0.03
    12  11.1649      0.00    -0.40       0.00    -0.09
    13  11.1652      0.00     0.29       0.00     0.19
    14  18.0566      0.00    -0.02       0.00    -0.03
    15  18.0567      0.00    -0.03       0.00    -0.15
    16  18.0569      0.00     0.07       0.00     0.08
    17  18.1136      0.00     0.16       0.00     0.00
    18  18.1137      0.00    -0.01       0.00    -0.02
    19  18.1139      0.00    -0.18       0.00     0.07

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.

03QF91    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.181    43.181    43.181
ecceobj         0.037     0.037     0.037
incobj          2.180     2.180     2.180
qmin           40.816    40.816    40.815
qmax           45.379    45.380    45.377
amean          43.002    43.002    43.002
amin           42.673    42.672    42.675
amax           43.334    43.333    43.341
emean           0.030     0.030     0.030
emin            0.008     0.008     0.008
emax            0.047     0.047     0.047
imean           1.010     1.010     1.010
imin            0.239     0.239     0.239
imax            1.654     1.654     1.654
excite_mean     0.035     0.035     0.035
fracstop        1.000     1.000     1.000
cjmean          3.088     3.088     3.088

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       182.9     182.7     182.9
kozaiamp        180.0     180.0     180.0