Orbit Fit and Astrometric record for 03QM91

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: 03QM91    
# Created Sun Dec  5 02:09:37 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     58 observations of     58
# Arc:  17.14y
# First observation: 2003/08/25
#  Last observation: 2020/10/15
# Chi-squared of fit:    20.45 DOF:    110 RMS:  0.10
# Min/Max residuals:    -0.42    0.29
# Exact a, adot, b, bdot, g, gdot:
  1.709159E-05  2.461024E-02  5.977739E-07  1.260137E-03  2.472546E-02 -2.164454E-04
# Covariance matrix:
  2.9650E-13 -4.0239E-14  3.0850E-15 -1.2098E-15  2.1240E-14 -5.7820E-14
 -4.0239E-14  1.2341E-14 -1.4375E-15  5.5664E-16  1.3100E-14  2.6501E-14
  3.0850E-15 -1.4375E-15  2.2754E-13 -1.8494E-14 -1.4759E-15 -3.5900E-15
 -1.2098E-15  5.5664E-16 -1.8494E-14  1.6933E-15  5.4183E-16  1.3924E-15
  2.1240E-14  1.3100E-14 -1.4759E-15  5.4183E-16  1.0995E-13  2.5356E-14
 -5.7820E-14  2.6501E-14 -3.5900E-15  1.3924E-15  2.5356E-14  6.6323E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.860736   -7.466299    0.362537   -0.014177   -0.948053  2452876.866633
# Heliocentric elements and errors
Epoch:              2452876.5000  =  2003/08/25
Mean Anomaly:          333.65422 +/-     0.025
Argument of Peri:       12.54459 +/-     0.027
Long of Asc Node:        8.02110 +/-     0.000
Inclination:             3.05165 +/-     0.000
Eccentricity:         0.04137537 +/-    0.0000
Semi-Major Axis:     42.96833896 +/-    0.0023
Time of Perihelion: 2460405.3711 +/-      10.4
Perihelion:          41.19050814 +/-    0.0027
Aphelion:            44.74616978 +/-    0.0028
Period (y)              281.6638 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           40.98698602 +/-    0.0005
Ecliptic Y           -5.73320494 +/-    0.0001
Ecliptic Z           -0.60755852 +/-    0.0000
Ecliptic XDOT         0.00032717 +/-    0.0000
Ecliptic YDOT         0.00269910 +/-    0.0000
Ecliptic ZDOT         0.00014005 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.39049154 +/-    0.0005
Geocenter to KBO     40.44416828 +/-    0.0005
# Hcoef:  6.39

The following table shows the complete astrometric record for 03QM91. 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 (03QM91) followed by the observatory code and reference code for the source of the astrometry.

2003 08  25.36589  23 33 56.24   -03 45 12.8   20.0R 03QM91    807  Ci4137      
2003 08  26.28761  23 33 52.41   -03 45 37.2         03QM91    807  Ci4137      
2003 08  26.39198  23 33 51.98   -03 45 39.9         03QM91    807  Ci4137      
2003 10  22.14651  23 29 50.38   -04 10 37.4   22.2R 03QM91    695  Cj4699      
2003 10  22.23381  23 29 50.07   -04 10 39.4         03QM91    695  Cj4699      
2013 09  08.19297  00 23 43.856  +02 26 18.19  23.7g 03QM91    W84  C~4yD1      
2013 09  08.19297  00 23 43.85   +02 26 18.2   23.9g 03QM91    W84  C~3cWO      
2013 09  09.201343 00 23 39.59   +02 25 51.2   23.4g 03QM91    W84  C~351P      
2013 09  11.30726  00 23 30.643  +02 24 55.30  23.3g 03QM91    W84  C~4yD1      
2013 09  11.30726  00 23 30.66   +02 24 55.3   23.6g 03QM91    W84  C~3cWO      
2013 09  28.10761  00 22 15.797  +02 17 04.64  23.1g 03QM91    W84  C~4yD1      
2013 09  28.10761  00 22 15.80   +02 17 04.6   23.3g 03QM91    W84  C~3cWO      
2013 09  30.154525 00 22 06.47   +02 16 06.2   22.4r 03QM91    W84  C~351P      
2013 09  30.15804  00 22 06.453  +02 16 06.07  22.1i 03QM91    W84  C~4yD1      
2013 09  30.15804  00 22 06.45   +02 16 06.1   22.2i 03QM91    W84  C~3cWO      
2013 10  03.09360  00 21 53.116  +02 14 42.36  23.1g 03QM91    W84  C~4yD1      
2013 10  03.09360  00 21 53.12   +02 14 42.3   23.6g 03QM91    W84  C~3cWO      
2013 10  04.15441  00 21 48.299  +02 14 12.07  22.9g 03QM91    W84  C~4yD1      
2013 10  04.15441  00 21 48.30   +02 14 12.1   23.3g 03QM91    W84  C~3cWO      
2013 10  13.09473  00 21 08.327  +02 10 01.19  21.8z 03QM91    W84  C~4yD1      
2013 10  13.09473  00 21 08.33   +02 10 01.2   22.0z 03QM91    W84  C~3cWO      
2013 10  13.11927  00 21 08.216  +02 10 00.52  22.1i 03QM91    W84  C~4yD1      
2013 10  13.11927  00 21 08.22   +02 10 00.5   22.1i 03QM91    W84  C~3cWO      
2013 11  22.07262  00 18 48.213  +01 55 31.03  22.4r 03QM91    W84  C~4yD1      
2013 11  22.07262  00 18 48.21   +01 55 31.0   22.5r 03QM91    W84  C~3cWO      
2013 11  22.07399  00 18 48.207  +01 55 31.02  22.4i 03QM91    W84  C~4yD1      
2013 11  22.07399  00 18 48.21   +01 55 31.0   22.5i 03QM91    W84  C~3cWO      
2013 11  23.09414  00 18 45.95   +01 55 17.3   22.1i 03QM91    W84  C~3cWO      
2014 10  29.13917  00 25 07.887  +02 40 57.70  21.9z 03QM91    W84  C~4yD1      
2014 10  29.13917  00 25 07.89   +02 40 57.7   22.2z 03QM91    W84  C~3cWO      
2014 11  13.09322  00 24 15.810  +02 35 34.01  22.1z 03QM91    W84  C~4yD1      
2014 11  13.09322  00 24 15.81   +02 35 34.0   22.1z 03QM91    W84  C~3cWO      
2016 08  14.255914 00 40 25.94   +04 27 49.7   21.9z 03QM91    W84  C~351P      
2016 08  14.25644  00 40 25.950  +04 27 49.58  22.3z 03QM91    W84  C~4yD1      
2016 09  09.29019  00 38 55.877  +04 18 39.64  22.4i 03QM91    W84  C~4yD1      
2016 09  09.29019  00 38 55.88   +04 18 39.6   22.4i 03QM91    W84  C~3cWO      
2016 09  09.29156  00 38 55.876  +04 18 39.60  22.5r 03QM91    W84  C~4yD1      
2016 09  09.29156  00 38 55.88   +04 18 39.6   22.5r 03QM91    W84  C~3cWO      
2016 09  09.29293  00 38 55.862  +04 18 39.49  23.5g 03QM91    W84  C~4yD1      
2016 09  09.29293  00 38 55.86   +04 18 39.5   23.5g 03QM91    W84  C~3cWO      
2016 09  11.17435  00 38 48.070  +04 17 51.75  21.9z 03QM91    W84  C~4yD1      
2016 09  11.17435  00 38 48.07   +04 17 51.7   22.0z 03QM91    W84  C~3cWO      
2016 11  08.14735  00 34 38.843  +03 52 04.82  22.5i 03QM91    W84  C~4yD1      
2016 11  08.14735  00 34 38.84   +03 52 04.8   22.5i 03QM91    W84  C~3cWO      
2016 11  08.14874  00 34 38.839  +03 52 04.70  22.2z 03QM91    W84  C~4yD1      
2016 11  08.14874  00 34 38.84   +03 52 04.8   22.2z 03QM91    W84  C~3cWO      
2016 11  26.11142  00 33 46.695  +03 46 42.59  22.5r 03QM91    W84  C~4yD1      
2016 11  26.11142  00 33 46.69   +03 46 42.6   22.4r 03QM91    W84  C~3cWO      
2016 11  30.09280  00 33 38.364  +03 45 51.83  22.2i 03QM91    W84  C~4yD1      
2016 11  30.09280  00 33 38.36   +03 45 51.9   22.4i 03QM91    W84  C~3cWO      
2016 11  30.09417  00 33 38.363  +03 45 51.78  22.9g 03QM91    W84  C~4yD1      
2016 11  30.09417  00 33 38.36   +03 45 51.8   23.0g 03QM91    W84  C~3cWO      
2017 09  27.26238  00 42 45.454  +04 48 10.30  22.2i 03QM91    W84  C~4yD1      
2017 09  27.26376  00 42 45.448  +04 48 10.31  22.6r 03QM91    W84  C~4yD1      
2017 09  27.26512  00 42 45.440  +04 48 10.33  23.6g 03QM91    W84  C~4yD1      
2020 10  15.34187  00 56 47.776  +06 31 23.72  22.3w 03QM91    F51  C~49MH      
2020 10  15.35295  00 56 47.724  +06 31 23.14  22.6w 03QM91    F51  C~49MH      
2020 10  15.36406  00 56 47.670  +06 31 23.23  22.4w 03QM91    F51  C~49MH      

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    -0.27       0.00    -0.07
     2   0.0025      0.00    -0.08       0.00     0.04
     3   0.0028      0.00     0.14       0.00     0.12
     4   0.1582      0.00     0.08       0.00     0.15
     5   0.1584      0.00     0.05       0.00    -0.06
     6  10.0392      0.00    -0.10       0.00     0.06
     7  10.0392      0.00    -0.19       0.00     0.07
     8  10.0420      0.00    -0.42       0.00    -0.29
     9  10.0478      0.00     0.00       0.00     0.11
    10  10.0478      0.00     0.26       0.00     0.11
    11  10.0937      0.00     0.17       0.00    -0.17
    12  10.0937      0.00     0.12       0.00    -0.13
    13  10.0994      0.00     0.03       0.00    -0.03
    14  10.0994      0.00    -0.03       0.00    -0.03
    15  10.0994      0.00     0.02       0.00    -0.06
    16  10.1074      0.00     0.19       0.00     0.01
    17  10.1074      0.00     0.13       0.00     0.07
    18  10.1103      0.00     0.15       0.00     0.03
    19  10.1103      0.00     0.13       0.00     0.00
    20  10.1348      0.00     0.11       0.00    -0.07
    21  10.1348      0.00     0.07       0.00    -0.08
    22  10.1348      0.00     0.11       0.00    -0.09
    23  10.1348      0.00     0.05       0.00    -0.07
    24  10.2442      0.00    -0.04       0.00    -0.07
    25  10.2442      0.00     0.01       0.00    -0.04
    26  10.2442      0.00     0.01       0.00    -0.06
    27  10.2442      0.00    -0.04       0.00    -0.04
    28  10.2470      0.00     0.01       0.00    -0.09
    29  11.1780      0.00    -0.00       0.00     0.13
    30  11.1780      0.00    -0.05       0.00     0.13
    31  11.2190      0.00     0.05       0.00    -0.04
    32  11.2190      0.00     0.05       0.00    -0.05
    33  12.9716      0.00    -0.19       0.00     0.09
    34  12.9716      0.00    -0.02       0.00    -0.02
    35  13.0429      0.00     0.03       0.00    -0.01
    36  13.0429      0.00    -0.01       0.00     0.03
    37  13.0429      0.00     0.12       0.00     0.02
    38  13.0429      0.00     0.06       0.00     0.02
    39  13.0429      0.00    -0.09       0.00    -0.05
    40  13.0429      0.00    -0.06       0.00    -0.06
    41  13.0481      0.00    -0.05       0.00     0.24
    42  13.0481      0.00    -0.05       0.00     0.29
    43  13.2068      0.00    -0.06       0.00     0.00
    44  13.2068      0.00    -0.02       0.00     0.02
    45  13.2068      0.00     0.01       0.00     0.03
    46  13.2068      0.00    -0.00       0.00    -0.07
    47  13.2560      0.00    -0.09       0.00    -0.08
    48  13.2560      0.00    -0.02       0.00    -0.09
    49  13.2669      0.00    -0.11       0.00     0.09
    50  13.2669      0.00    -0.05       0.00     0.02
    51  13.2669      0.00    -0.06       0.00     0.01
    52  13.2669      0.00    -0.02       0.00    -0.01
    53  14.0914      0.00     0.01       0.00     0.01
    54  14.0914      0.00     0.02       0.00     0.06
    55  14.0914      0.00    -0.01       0.00     0.12
    56  17.1416      0.00     0.07       0.00     0.03
    57  17.1416      0.00     0.06       0.00    -0.25
    58  17.1417      0.00     0.03       0.00     0.15

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.

03QM91    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.418    43.418    43.418
ecceobj         0.050     0.050     0.051
incobj          3.036     3.036     3.036
qmin           40.086    40.087    40.087
qmax           46.455    46.450    46.460
amean          43.183    43.183    43.183
amin           42.849    42.852    42.848
amax           43.534    43.531    43.532
emean           0.050     0.050     0.050
emin            0.029     0.029     0.029
emax            0.068     0.068     0.068
imean           2.954     2.955     2.954
imin            1.945     1.945     1.945
imax            3.916     3.915     3.916
excite_mean     0.072     0.072     0.072
fracstop        1.000     1.000     1.000
cjmean          3.085     3.085     3.085

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       180.2     180.0     180.1
kozaiamp        179.9     180.0     180.0