Orbit Fit and Astrometric record for 03QL91

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: 03QL91    
# Created Thu Dec  9 02:09:36 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     59 observations of     59
# Arc:  18.11y
# First observation: 2003/08/25
#  Last observation: 2021/10/04
# Chi-squared of fit:    29.00 DOF:    112 RMS:  0.12
# Min/Max residuals:    -0.35    0.71
# Exact a, adot, b, bdot, g, gdot:
  1.562036E-05  2.316441E-02  1.588143E-07 -6.053803E-04  2.399146E-02 -1.241970E-04
# Covariance matrix:
  1.4917E-13 -4.4232E-14 -6.0803E-16  1.0133E-15  7.1786E-14 -9.4395E-14
 -4.4232E-14  4.2522E-14  7.6460E-16 -1.1225E-15 -2.5867E-14  1.0387E-13
 -6.0803E-16  7.6460E-16  9.7272E-14 -6.0749E-15 -2.2823E-16  1.8894E-15
  1.0133E-15 -1.1225E-15 -6.0749E-15  5.2188E-16  6.7293E-16 -2.7742E-15
  7.1786E-14 -2.5867E-14 -2.2823E-16  6.7293E-16  1.5122E-13 -6.4048E-14
 -9.4395E-14  1.0387E-13  1.8894E-15 -2.7742E-15 -6.4048E-14  2.5671E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.363293  -28.731611   -0.003692    0.006491   -1.015128  2452876.730483
# Heliocentric elements and errors
Epoch:              2452876.5000  =  2003/08/25
Mean Anomaly:          298.33610 +/-     0.040
Argument of Peri:      229.01570 +/-     0.042
Long of Asc Node:      164.59935 +/-     0.000
Inclination:             1.53883 +/-     0.000
Eccentricity:         0.00671459 +/-    0.0001
Semi-Major Axis:     42.82741331 +/-    0.0033
Time of Perihelion: 2470411.6589 +/-      15.0
Perihelion:          42.53984500 +/-    0.0041
Aphelion:            43.11498162 +/-    0.0042
Period (y)              280.2793 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           37.43842069 +/-    0.0006
Ecliptic Y          -20.51676345 +/-    0.0003
Ecliptic Z            0.26427912 +/-    0.0000
Ecliptic XDOT         0.00125344 +/-    0.0000
Ecliptic YDOT         0.00231889 +/-    0.0000
Ecliptic ZDOT        -0.00006900 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.69242427 +/-    0.0005
Geocenter to KBO     41.68154649 +/-    0.0007
# Hcoef:  7.01

The following table shows the complete astrometric record for 03QL91. 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 (03QL91) followed by the observatory code and reference code for the source of the astrometry.

2003 08  25.22974  22 12 40.28   -10 41 02.6   21.9R 03QL91    807  Ci4137      
2003 08  26.21790  22 12 35.82   -10 41 27.5         03QL91    807  Ci4137      
2003 08  26.32469  22 12 35.34   -10 41 30.4         03QL91    807  Ci4137      
2003 09  28.21164  22 10 18.06   -10 54 34.0   22.8R 03QL91    688  Ci6257      
2003 09  28.33720  22 10 17.66   -10 54 36.3         03QL91    688  Ci6257      
2003 10  23.01618  22 09 09.21   -11 01 15.0   23.1R 03QL91    304  Ci9429      
2003 10  23.04322  22 09 09.16   -11 01 15.4         03QL91    304  Ci9429      
2003 10  23.14171  22 09 08.98   -11 01 16.8   22.6R 03QL91    695  Cj8802      
2003 10  24.17136  22 09 07.09   -11 01 28.0         03QL91    695  Cj8802      
2004 07  17.30741  22 20 20.98   -09 59 43.3         03QL91    807  C~0Col      
2004 08  12.28135  22 18 39.31   -10 09 26.7   22.0R 03QL91    807  Cl8405      
2004 08  12.35092  22 18 38.99   -10 09 28.3         03QL91    807  Cl8405      
2004 10  10.16522  22 14 40.60   -10 32 27.5   22.9R 03QL91    695  Cl8405      
2004 10  10.29698  22 14 40.21   -10 32 29.7         03QL91    695  Cl8405      
2004 11  10.14154  22 13 48.85   -10 37 42.8   23.0R 03QL91    695  Cl9847      
2004 11  11.11617  22 13 48.55   -10 37 45.3         03QL91    695  Cl9847      
2014 07  29.38518  23 09 43.45   -05 24 53.7   22.9R 03QL91    G37  C~16aI      
2014 07  29.43316  23 09 43.29   -05 24 54.6         03QL91    G37  C~16aI      
2019 08  28.21047  23 32 37.29   -03 10 48.6   23.8V 03QL91    W84  C~3GHs      
2019 08  28.23217  23 32 37.20   -03 10 48.8         03QL91    W84  C~3GHs      
2019 08  28.23734  23 32 37.17   -03 10 49.0         03QL91    W84  C~3GHs      
2019 08  28.24595  23 32 37.13   -03 10 49.2         03QL91    W84  C~3GHs      
2019 08  28.25284  23 32 37.10   -03 10 49.5         03QL91    W84  C~3GHs      
2019 08  28.25974  23 32 37.07   -03 10 49.8         03QL91    W84  C~3GHs      
2019 08  28.26662  23 32 37.04   -03 10 49.7         03QL91    W84  C~3GHs      
2019 08  28.27180  23 32 37.02   -03 10 49.9         03QL91    W84  C~3GHs      
2019 08  28.27871  23 32 37.00   -03 10 50.5         03QL91    W84  C~3GHs      
2019 08  28.28042  23 32 36.98   -03 10 50.2         03QL91    W84  C~3GHs      
2019 08  28.28733  23 32 36.95   -03 10 50.3         03QL91    W84  C~3GHs      
2019 08  28.32901  23 32 36.78   -03 10 51.6         03QL91    W84  C~3GHs      
2019 08  28.33591  23 32 36.75   -03 10 51.6         03QL91    W84  C~3GHs      
2019 08  28.34111  23 32 36.73   -03 10 51.8         03QL91    W84  C~3GHs      
2019 08  28.34807  23 32 36.70   -03 10 52.2         03QL91    W84  C~3GHs      
2019 08  28.34979  23 32 36.70   -03 10 52.0         03QL91    W84  C~3GHs      
2019 08  28.35669  23 32 36.66   -03 10 52.2         03QL91    W84  C~3GHs      
2019 08  28.36359  23 32 36.63   -03 10 52.4         03QL91    W84  C~3GHs      
2019 08  28.37050  23 32 36.60   -03 10 52.6         03QL91    W84  C~3GHs      
2019 08  28.37591  23 32 36.58   -03 10 52.8         03QL91    W84  C~3GHs      
2019 08  28.38279  23 32 36.56   -03 10 53.0         03QL91    W84  C~3GHs      
2019 08  28.38451  23 32 36.55   -03 10 53.1         03QL91    W84  C~3GHs      
2019 09  29.01843  23 30 20.11   -03 25 42.9   23.7V 03QL91    W84  C~3GHs      
2019 09  29.03743  23 30 20.04   -03 25 43.5         03QL91    W84  C~3GHs      
2019 09  29.04089  23 30 20.02   -03 25 43.7   23.8V 03QL91    W84  C~3GHs      
2019 09  29.05123  23 30 19.97   -03 25 43.8         03QL91    W84  C~3GHs      
2019 09  29.07020  23 30 19.89   -03 25 44.4         03QL91    W84  C~3GHs      
2019 09  29.08399  23 30 19.83   -03 25 44.8         03QL91    W84  C~3GHs      
2019 09  29.10293  23 30 19.75   -03 25 45.3         03QL91    W84  C~3GHs      
2019 09  29.10638  23 30 19.74   -03 25 45.4         03QL91    W84  C~3GHs      
2019 09  29.11673  23 30 19.69   -03 25 45.6         03QL91    W84  C~3GHs      
2019 09  29.13570  23 30 19.61   -03 25 46.1         03QL91    W84  C~3GHs      
2019 09  29.13915  23 30 19.59   -03 25 46.3         03QL91    W84  C~3GHs      
2020 10  21.00568  23 33 48.63   -03 05 44.7   23.8V 03QL91    W84  C~4Iov      
2020 10  21.06146  23 33 48.45   -03 05 46.0         03QL91    W84  C~4Iov      
2020 10  21.08897  23 33 48.35   -03 05 46.5         03QL91    W84  C~4Iov      
2020 10  21.14619  23 33 48.15   -03 05 47.9         03QL91    W84  C~4Iov      
2021 10  04.00215  23 39 51.92   -02 28 54.6   23.7V 03QL91    W84  C~553k      
2021 10  04.04430  23 39 51.75   -02 28 55.7   23.5V 03QL91    W84  C~553k      
2021 10  04.08737  23 39 51.56   -02 28 56.8   23.8V 03QL91    W84  C~553k      
2021 10  04.14136  23 39 51.33   -02 28 58.4   23.5V 03QL91    W84  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    -0.03       0.00    -0.13
     2   0.0027      0.00    -0.15       0.00     0.26
     3   0.0030      0.00    -0.03       0.00     0.08
     4   0.0930      0.00    -0.13       0.00     0.11
     5   0.0934      0.00     0.71       0.00     0.38
     6   0.1609      0.00    -0.04       0.00     0.08
     7   0.1610      0.00     0.00       0.00    -0.02
     8   0.1613      0.00     0.05       0.00    -0.11
     9   0.1641      0.00    -0.11       0.00    -0.05
    10   0.8955      0.00    -0.03       0.00    -0.31
    11   0.9666      0.00     0.09       0.00    -0.15
    12   0.9668      0.00    -0.09       0.00    -0.02
    13   1.1278      0.00     0.09       0.00    -0.15
    14   1.1282      0.00     0.04       0.00    -0.13
    15   1.2126      0.00    -0.12       0.00     0.05
    16   1.2153      0.00    -0.15       0.00     0.06
    17  10.9272      0.00    -0.01       0.00     0.11
    18  10.9273      0.00    -0.10       0.00     0.18
    19  16.0082      0.00     0.19       0.00    -0.29
    20  16.0082      0.00     0.21       0.00     0.09
    21  16.0082      0.00     0.08       0.00     0.03
    22  16.0083      0.00     0.03       0.00     0.07
    23  16.0083      0.00     0.01       0.00    -0.05
    24  16.0083      0.00    -0.01       0.00    -0.16
    25  16.0083      0.00    -0.02       0.00     0.12
    26  16.0083      0.00     0.00       0.00     0.06
    27  16.0083      0.00     0.14       0.00    -0.35
    28  16.0084      0.00    -0.05       0.00    -0.00
    29  16.0084      0.00    -0.07       0.00     0.08
    30  16.0085      0.00     0.00       0.00    -0.09
    31  16.0085      0.00    -0.01       0.00     0.09
    32  16.0085      0.00     0.01       0.00     0.03
    33  16.0085      0.00    -0.00       0.00    -0.18
    34  16.0085      0.00     0.11       0.00     0.07
    35  16.0086      0.00    -0.06       0.00     0.06
    36  16.0086      0.00    -0.08       0.00     0.04
    37  16.0086      0.00    -0.09       0.00     0.03
    38  16.0086      0.00    -0.06       0.00    -0.03
    39  16.0086      0.00     0.08       0.00    -0.04
    40  16.0086      0.00     0.03       0.00    -0.09
    41  16.0952      0.00    -0.05       0.00     0.06
    42  16.0953      0.00     0.13       0.00    -0.02
    43  16.0953      0.00     0.05       0.00    -0.12
    44  16.0953      0.00    -0.03       0.00     0.06
    45  16.0954      0.00    -0.01       0.00    -0.01
    46  16.0954      0.00    -0.02       0.00    -0.03
    47  16.0955      0.00     0.01       0.00    -0.01
    48  16.0955      0.00     0.08       0.00    -0.02
    49  16.0955      0.00     0.00       0.00     0.07
    50  16.0956      0.00     0.03       0.00     0.09
    51  16.0956      0.00    -0.05       0.00    -0.01
    52  17.1575      0.00    -0.23       0.00     0.08
    53  17.1577      0.00    -0.00       0.00     0.02
    54  17.1577      0.00    -0.06       0.00     0.13
    55  17.1579      0.00    -0.06       0.00    -0.00
    56  18.1103      0.00    -0.08       0.00    -0.04
    57  18.1104      0.00     0.04       0.00     0.01
    58  18.1105      0.00    -0.08       0.00     0.08
    59  18.1106      0.00    -0.09       0.00    -0.05

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.

03QL91    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.203    43.203    43.203
ecceobj         0.014     0.014     0.014
incobj          1.533     1.533     1.533
qmin           41.408    41.409    41.408
qmax           44.917    44.915    44.918
amean          43.087    43.087    43.087
amin           42.759    42.759    42.759
amax           43.419    43.419    43.419
emean           0.020     0.020     0.020
emin            0.001     0.001     0.000
emax            0.035     0.035     0.035
imean           2.463     2.463     2.463
imin            1.467     1.467     1.467
imax            3.168     3.168     3.168
excite_mean     0.048     0.048     0.048
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       187.5     187.6     187.6
kozaiamp        179.9     180.0     180.0