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 Tue Feb 18 02:09:04 2020
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   24 observations of   24
# Arc:  13.27y
# First observation: 2003/08/25
#  Last observation: 2016/11/30
# Chi-squared of fit:    12.70 DOF:   42 RMS:  0.13
# Min/Max residuals:    -0.37    0.27
# Exact a, adot, b, bdot, g, gdot:
  1.700639E-05  2.461021E-02  6.744664E-07  1.260135E-03  2.472532E-02 -2.164958E-04
# Covariance matrix:
  3.1848E-13 -3.6592E-14  5.0481E-16 -7.8463E-16  7.2677E-14 -4.8753E-14
 -3.6592E-14  4.2014E-14 -1.5182E-15  2.0729E-15  4.2820E-14  1.2768E-13
  5.0481E-16 -1.5182E-15  2.8030E-13 -2.4416E-14 -1.5720E-15 -4.9343E-15
 -7.8463E-16  2.0729E-15 -2.4416E-14  2.7722E-15  1.9081E-15  6.7621E-15
  7.2677E-14  4.2820E-14 -1.5720E-15  1.9081E-15  2.6155E-13  1.1647E-13
 -4.8753E-14  1.2768E-13 -4.9343E-15  6.7621E-15  1.1647E-13  4.1662E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.860736   -7.466299    0.362537   -0.014177   -0.948054  2452876.866633
# Heliocentric elements and errors
Epoch:              2452876.5000  =  2003/08/25
Mean Anomaly:          333.66166 +/-     0.044
Argument of Peri:       12.53746 +/-     0.048
Long of Asc Node:        8.02103 +/-     0.000
Inclination:             3.05164 +/-     0.000
Eccentricity:         0.04139005 +/-    0.0001
Semi-Major Axis:     42.96926444 +/-    0.0035
Time of Perihelion: 2460403.4880 +/-      17.1
Perihelion:          41.19076434 +/-    0.0041
Aphelion:            44.74776454 +/-    0.0043
Period (y)              281.6729 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           40.98721041 +/-    0.0008
Ecliptic Y           -5.73323782 +/-    0.0001
Ecliptic Z           -0.60755883 +/-    0.0000
Ecliptic XDOT         0.00032717 +/-    0.0000
Ecliptic YDOT         0.00269912 +/-    0.0000
Ecliptic ZDOT         0.00014005 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.39071831 +/-    0.0008
Geocenter to KBO     40.44439502 +/-    0.0008
# Hcoef:  6.74

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  08.192442 00 23 43.85   +02 26 18.2   23.4g 03QM91    W84  C~351P      
2013 09  09.201343 00 23 39.59   +02 25 51.2   23.4g 03QM91    W84  C~351P      
2013 09  11.306736 00 23 30.66   +02 24 55.3   23.5g 03QM91    W84  C~351P      
2013 09  28.107083 00 22 15.80   +02 17 04.6   23.1g 03QM91    W84  C~351P      
2013 09  30.154525 00 22 06.47   +02 16 06.2   22.4r 03QM91    W84  C~351P      
2013 09  30.157512 00 22 06.45   +02 16 06.1   22.2i 03QM91    W84  C~351P      
2013 10  03.093067 00 21 53.12   +02 14 42.3   23.6g 03QM91    W84  C~351P      
2013 10  04.153877 00 21 48.30   +02 14 12.1   23.2g 03QM91    W84  C~351P      
2013 11  22.072095 00 18 48.21   +01 55 31.0   22.6r 03QM91    W84  C~351P      
2013 11  22.073461 00 18 48.21   +01 55 31.0   22.3i 03QM91    W84  C~351P      
2014 10  29.138646 00 25 07.89   +02 40 57.7   22.1z 03QM91    W84  C~351P      
2014 11  13.092697 00 24 15.81   +02 35 34.0   21.9z 03QM91    W84  C~351P      
2016 08  14.255914 00 40 25.94   +04 27 49.7   21.9z 03QM91    W84  C~351P      
2016 09  09.289664 00 38 55.88   +04 18 39.6   22.1i 03QM91    W84  C~351P      
2016 09  09.291042 00 38 55.88   +04 18 39.6   22.4r 03QM91    W84  C~351P      
2016 09  11.173831 00 38 48.07   +04 17 51.7   22.0z 03QM91    W84  C~351P      
2016 11  08.146829 00 34 38.84   +03 52 04.8   22.2i 03QM91    W84  C~351P      
2016 11  26.110891 00 33 46.69   +03 46 42.6   22.6r 03QM91    W84  C~351P      
2016 11  30.092269 00 33 38.36   +03 45 51.9   22.2i 03QM91    W84  C~351P      

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    -0.25       0.00    -0.08
  2   0.0025      0.00    -0.06       0.00     0.03
  3   0.0028      0.00     0.16       0.00     0.11
  4   0.1582      0.00     0.08       0.00     0.13
  5   0.1584      0.00     0.05       0.00    -0.08
  6  10.0392      0.00    -0.17       0.00     0.06
  7  10.0420      0.00    -0.37       0.00    -0.28
  8  10.0478      0.00     0.27       0.00     0.10
  9  10.0937      0.00     0.17       0.00    -0.18
 10  10.0994      0.00     0.07       0.00    -0.03
 11  10.0994      0.00    -0.02       0.00    -0.04
 12  10.1074      0.00     0.19       0.00     0.00
 13  10.1103      0.00     0.15       0.00     0.02
 14  10.2442      0.00    -0.04       0.00    -0.09
 15  10.2442      0.00     0.01       0.00    -0.07
 16  11.1780      0.00    -0.00       0.00     0.12
 17  11.2190      0.00     0.05       0.00    -0.06
 18  12.9716      0.00    -0.12       0.00     0.11
 19  13.0429      0.00     0.06       0.00    -0.01
 20  13.0429      0.00     0.15       0.00     0.02
 21  13.0481      0.00    -0.02       0.00     0.24
 22  13.2068      0.00    -0.06       0.00    -0.00
 23  13.2560      0.00    -0.08       0.00    -0.08
 24  13.2669      0.00    -0.09       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.

03QM91    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.419    43.419    43.419
ecceobj         0.051     0.051     0.051
incobj          3.036     3.036     3.036
qmin           40.124    40.126    40.122
qmax           46.424    46.425    46.424
amean          43.184    43.184    43.184
amin           42.851    42.849    42.853
amax           43.537    43.535    43.539
emean           0.050     0.050     0.050
emin            0.030     0.030     0.030
emax            0.067     0.067     0.067
imean           2.955     2.955     2.955
imin            1.946     1.945     1.946
imax            3.917     3.917     3.917
excite_mean     0.072     0.072     0.072
fracstop        1.000     1.000     1.000
cjmean          3.086     3.086     3.086

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       180.4     180.3     180.4
kozaiamp        180.0     180.0     180.0