Orbit Fit and Astrometric record for 03QT91

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: 03QT91    
# Created Sun Dec  5 02:09:39 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     46 observations of     46
# Arc:  18.05y
# First observation: 2003/08/25
#  Last observation: 2021/09/12
# Chi-squared of fit:    31.64 DOF:     86 RMS:  0.15
# Min/Max residuals:    -0.43    0.44
# Exact a, adot, b, bdot, g, gdot:
  1.620019E-05  2.549745E-02 -5.555468E-07 -7.802830E-05  2.504859E-02  1.114064E-03
# Covariance matrix:
  1.7646E-13 -2.6702E-14 -1.1248E-16  5.1878E-17  5.0484E-15 -3.9459E-14
 -2.6702E-14  1.6015E-14  7.8680E-17 -4.4380E-17  3.7680E-14  3.3454E-14
 -1.1248E-16  7.8680E-17  1.3756E-13 -1.0440E-14  1.3905E-16  1.7958E-16
  5.1878E-17 -4.4380E-17 -1.0440E-14  1.0186E-15 -1.0340E-16 -9.9563E-17
  5.0484E-15  3.7680E-14  1.3905E-16 -1.0340E-16  1.9378E-13  7.7187E-14
 -3.9459E-14  3.3454E-14  1.7958E-16 -9.9563E-17  7.7187E-14  7.5106E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.072242  -12.188542    0.283312   -0.001163   -0.974769  2452876.862803
# Heliocentric elements and errors
Epoch:              2452876.5000  =  2003/08/25
Mean Anomaly:           24.76655 +/-     0.018
Argument of Peri:      173.31569 +/-     0.025
Long of Asc Node:      145.19966 +/-     0.014
Inclination:             0.18667 +/-     0.000
Eccentricity:         0.07857970 +/-    0.0000
Semi-Major Axis:     43.97935323 +/-    0.0031
Time of Perihelion: 2445547.6705 +/-       5.3
Perihelion:          40.52346885 +/-    0.0034
Aphelion:            47.43523760 +/-    0.0038
Period (y)              291.6631 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           39.91274995 +/-    0.0007
Ecliptic Y           -8.90726178 +/-    0.0001
Ecliptic Z           -0.05038425 +/-    0.0000
Ecliptic XDOT         0.00070216 +/-    0.0000
Ecliptic YDOT         0.00269266 +/-    0.0000
Ecliptic ZDOT        -0.00000851 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.89459135 +/-    0.0007
Geocenter to KBO     39.92240641 +/-    0.0007
# Hcoef:  7.09

The following table shows the complete astrometric record for 03QT91. 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 (03QT91) followed by the observatory code and reference code for the source of the astrometry.

2003 08  25.36206  23 15 16.55   -04 53 02.5   22.0R 03QT91    807  Ci4137      
2003 08  26.26631  23 15 12.64   -04 53 27.4         03QT91    807  Ci4137      
2003 08  26.37140  23 15 12.16   -04 53 30.4         03QT91    807  Ci4137      
2003 10  23.17707  23 11 10.86   -05 18 55.9   22.8R 03QT91    304  Ci9429      
2003 10  23.20064  23 11 10.81   -05 18 56.5         03QT91    304  Ci9429      
2004 07  16.37831  23 22 51.53   -04 05 00.9   22.1R 03QT91    807  Cl4360      
2004 07  16.43063  23 22 51.43   -04 05 01.6         03QT91    807  Cl4360      
2004 08  23.15117  23 20 45.80   -04 18 27.5   23.0R 03QT91    304  Cl4360      
2004 08  23.28649  23 20 45.22   -04 18 31.1         03QT91    304  Cl4360      
2008 10  30.240455 23 37 26.22   -02 32 34.2         03QT91    645  C~1Ghp      
2008 10  30.241284 23 37 26.22   -02 32 34.2         03QT91    645  C~1Ghp      
2008 10  30.243772 23 37 26.21   -02 32 34.3         03QT91    645  C~1Ghp      
2013 09  09.19622  00 07 23.652  +00 40 36.47  23.8g 03QT91    W84  C~4yD1      
2013 09  30.16242  00 05 50.378  +00 30 29.65  22.7r 03QT91    W84  C~4yD1      
2013 09  30.16242  00 05 50.38   +00 30 29.5   23.4r 03QT91    W84  C~3cWO      
2013 10  13.06662  00 04 53.977  +00 24 22.89  23.4z 03QT91    W84  C~4yD1      
2013 10  13.10922  00 04 53.794  +00 24 21.60  23.4i 03QT91    W84  C~4yD1      
2013 10  13.10922  00 04 53.79   +00 24 21.6   23.4i 03QT91    W84  C~3cWO      
2013 11  22.06982  00 02 45.352  +00 10 29.84  23.6r 03QT91    W84  C~4yD1      
2013 11  22.06982  00 02 45.35   +00 10 29.8   23.7r 03QT91    W84  C~3cWO      
2013 11  22.07119  00 02 45.344  +00 10 29.57  22.7i 03QT91    W84  C~4yD1      
2013 11  23.08855  00 02 43.494  +00 10 17.72  23.4r 03QT91    W84  C~4yD1      
2014 10  22.16685  00 09 31.68   +00 54 13.5   23.0R 03QT91    G37  C~1BxD      
2014 10  22.27376  00 09 31.26   +00 54 10.8         03QT91    G37  C~1BxD      
2014 10  29.13068  00 09 05.311  +00 51 22.57  23.1z 03QT91    W84  C~4yD1      
2016 10  02.18024  00 21 20.812  +02 10 21.41  22.7i 03QT91    W84  C~4yD1      
2016 10  02.18024  00 21 20.81   +02 10 21.4   22.7i 03QT91    W84  C~3cWO      
2016 10  02.18163  00 21 20.817  +02 10 21.14  22.9r 03QT91    W84  C~4yD1      
2016 10  02.18301  00 21 20.808  +02 10 21.30  24.1g 03QT91    W84  C~4yD1      
2016 11  30.10514  00 18 00.057  +01 48 46.89  22.8i 03QT91    W84  C~4yD1      
2016 11  30.10514  00 18 00.06   +01 48 46.9   23.2i 03QT91    W84  C~3cWO      
2016 12  05.08896  00 17 53.499  +01 48 05.07  23.2r 03QT91    W84  C~4yD1      
2016 12  05.08896  00 17 53.50   +01 48 05.1   23.3r 03QT91    W84  C~3cWO      
2017 08  28.26891  00 29 01.190  +02 59 39.82  24.0r 03QT91    W84  C~4yD1      
2017 08  28.27027  00 29 01.184  +02 59 39.73  24.3g 03QT91    W84  C~4yD1      
2017 09  27.17455  00 26 56.427  +02 46 13.82  22.4z 03QT91    W84  C~4yD1      
2017 10  29.13756  00 24 39.210  +02 31 29.44  22.4z 03QT91    W84  C~4yD1      
2018 09  09.32306  00 33 26.282  +03 27 46.93  22.5i 03QT91    W84  C~4yD1      
2018 09  09.32445  00 33 26.276  +03 27 46.94  23.5r 03QT91    W84  C~4yD1      
2018 09  09.32583  00 33 26.287  +03 27 46.85  23.9g 03QT91    W84  C~4yD2      
2018 10  18.15348  00 30 35.934  +03 09 31.98  22.5z 03QT91    W84  C~4yD2      
2018 10  18.19053  00 30 35.762  +03 09 30.99  22.9i 03QT91    W84  C~4yD2      
2018 11  09.14631  00 29 11.039  +03 00 27.93  23.8r 03QT91    W84  C~4yD2      
2021 09  12.347260 00 48 44.809  +05 04 29.54  23.2G 03QT91    G37  C~553k      
2021 09  12.408180 00 48 44.554  +05 04 28.13        03QT91    G37  C~553k      
2021 09  12.468340 00 48 44.312  +05 04 26.51        03QT91    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    -0.06       0.00     0.09
     2   0.0025      0.00     0.18       0.00     0.17
     3   0.0028      0.00    -0.03       0.00     0.08
     4   0.1610      0.00    -0.16       0.00     0.15
     5   0.1611      0.00     0.20       0.00     0.01
     6   0.8926      0.00    -0.30       0.00    -0.06
     7   0.8927      0.00    -0.07       0.00    -0.05
     8   0.9960      0.00    -0.07       0.00     0.14
     9   0.9964      0.00     0.00       0.00     0.22
    10   5.1824      0.00     0.12       0.00    -0.39
    11   5.1824      0.00     0.16       0.00    -0.37
    12   5.1824      0.00     0.12       0.00    -0.43
    13  10.0420      0.00     0.44       0.00    -0.12
    14  10.0994      0.00     0.05       0.00     0.05
    15  10.0994      0.00     0.02       0.00     0.20
    16  10.1347      0.00    -0.02       0.00     0.01
    17  10.1348      0.00    -0.09       0.00    -0.11
    18  10.1348      0.00    -0.03       0.00    -0.11
    19  10.2442      0.00     0.07       0.00     0.06
    20  10.2442      0.00     0.10       0.00     0.10
    21  10.2442      0.00     0.02       0.00    -0.16
    22  10.2470      0.00     0.17       0.00    -0.04
    23  11.1589      0.00    -0.43       0.00     0.21
    24  11.1592      0.00    -0.28       0.00     0.24
    25  11.1780      0.00     0.06       0.00     0.06
    26  13.1056      0.00     0.03       0.00     0.05
    27  13.1056      0.00     0.06       0.00     0.06
    28  13.1056      0.00     0.23       0.00    -0.17
    29  13.1056      0.00     0.19       0.00     0.03
    30  13.2669      0.00    -0.03       0.00     0.08
    31  13.2669      0.00    -0.08       0.00     0.07
    32  13.2806      0.00    -0.01       0.00     0.04
    33  13.2806      0.00    -0.02       0.00     0.01
    34  14.0093      0.00    -0.05       0.00     0.02
    35  14.0093      0.00    -0.07       0.00    -0.04
    36  14.0912      0.00    -0.10       0.00     0.07
    37  14.1787      0.00    -0.16       0.00    -0.13
    38  15.0416      0.00    -0.04       0.00    -0.02
    39  15.0416      0.00    -0.04       0.00     0.02
    40  15.0417      0.00     0.21       0.00    -0.03
    41  15.1480      0.00     0.12       0.00    -0.02
    42  15.1481      0.00    -0.04       0.00     0.01
    43  15.2082      0.00    -0.18       0.00    -0.01
    44  18.0506      0.00     0.01       0.00    -0.04
    45  18.0508      0.00    -0.05       0.00     0.11
    46  18.0509      0.00     0.04       0.00     0.04

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.

03QT91    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.448    44.448    44.448
ecceobj         0.087     0.087     0.087
incobj          0.188     0.188     0.188
qmin           39.888    39.889    39.886
qmax           48.884    48.885    48.883
amean          44.224    44.224    44.224
amin           43.877    43.877    43.877
amax           44.596    44.597    44.595
emean           0.080     0.080     0.080
emin            0.065     0.065     0.065
emax            0.096     0.096     0.096
imean           1.849     1.849     1.849
imin            1.127     1.127     1.127
imax            2.459     2.459     2.459
excite_mean     0.087     0.087     0.087
fracstop        1.000     1.000     1.000
cjmean          3.095     3.095     3.095

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       179.8     179.8     179.9
kozaiamp        179.9     179.9     180.0