Orbit Fit and Astrometric record for 03QX90

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: 03QX90    
# Created Thu Dec  9 02:09:34 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     17 observations of     17
# Arc:  16.97y
# First observation: 2003/08/24
#  Last observation: 2020/08/12
# Chi-squared of fit:    44.23 DOF:     28 RMS:  0.29
# Min/Max residuals:    -0.54    0.76
# Exact a, adot, b, bdot, g, gdot:
  1.616995E-05  2.130556E-02 -1.742173E-07 -3.458577E-04  2.288856E-02  5.910093E-05
# Covariance matrix:
  1.6586E-13 -3.6471E-14  4.5102E-16  3.7350E-16 -3.7534E-14 -7.2662E-14
 -3.6471E-14  3.1364E-14 -6.0319E-17 -4.4545E-16  2.2422E-14  8.3419E-14
  4.5102E-16 -6.0319E-17  1.4170E-13 -1.0898E-14 -4.1716E-15  2.1851E-17
  3.7350E-16 -4.4545E-16 -1.0898E-14  2.3447E-15 -1.4705E-16 -1.2895E-15
 -3.7534E-14  2.2422E-14 -4.1716E-15 -1.4705E-16  2.0162E-13  5.5718E-14
 -7.2662E-14  8.3419E-14  2.1851E-17 -1.2895E-15  5.5718E-14  2.4015E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   -3.137493  -45.548729   -0.277791   -0.053414   -0.975226  2452875.537223
# Heliocentric elements and errors
Epoch:              2452876.5000  =  2003/08/25
Mean Anomaly:          159.67962 +/-     0.064
Argument of Peri:       92.78989 +/-     0.060
Long of Asc Node:       61.32489 +/-     0.002
Inclination:             3.20099 +/-     0.000
Eccentricity:         0.02703951 +/-    0.0001
Semi-Major Axis:     43.55346864 +/-    0.0031
Time of Perihelion: 2406309.3631 +/-      19.2
Perihelion:          42.37580433 +/-    0.0038
Aphelion:            44.73113295 +/-    0.0039
Period (y)              287.4368 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           31.43027859 +/-    0.0006
Ecliptic Y          -31.63970056 +/-    0.0006
Ecliptic Z           -2.39125796 +/-    0.0000
Ecliptic XDOT         0.00181733 +/-    0.0000
Ecliptic YDOT         0.00177558 +/-    0.0000
Ecliptic ZDOT        -0.00004152 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.66151201 +/-    0.0006
Geocenter to KBO     43.68997709 +/-    0.0009
# Hcoef:  6.69

The following table shows the complete astrometric record for 03QX90. 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 (03QX90) followed by the observatory code and reference code for the source of the astrometry.

2003 08  24.03648  21 11 32.05   -19 29 45.8   21.8R 03QX90    807  Ci4137      
2003 08  24.14308  21 11 31.58   -19 29 47.7         03QX90    807  Ci4137      
2003 08  25.05255  21 11 27.60   -19 30 03.9         03QX90    807  Ci4137      
2003 10  01.26065  21 09 15.43   -19 38 07.9   23.2R 03QX90    568  Ci6964      
2003 10  01.35035  21 09 15.18   -19 38 08.7         03QX90    568  Ci6964      
2003 10  02.30460  21 09 12.93   -19 38 15.1         03QX90    568  Ci6964      
2003 10  22.12061  21 08 42.83   -19 39 07.4   23.4R 03QX90    695  Cj8802      
2003 10  23.10437  21 08 42.24   -19 39 05.9         03QX90    695  Cj8802      
2004 05  28.24123  21 21 31.37   -18 43 12.3         03QX90    304  Cn6523      
2004 05  28.29809  21 21 31.29   -18 43 12.7         03QX90    304  Cn6523      
2005 06  07.39127  21 26 09.46   -18 23 27.8   23.2R 03QX90    304  Cn6523      
2005 06  07.43225  21 26 09.39   -18 23 28.2         03QX90    304  Cn6523      
2013 10  05.17090  21 57 25.79   -15 54 41.2   22.8R 03QX90    695  C~0zdV      
2013 10  05.27332  21 57 25.46   -15 54 42.7         03QX90    695  C~0zdV      
2013 10  06.20861  21 57 22.82   -15 54 53.0         03QX90    695  C~0zdV      
2020 08  12.271170 22 33 46.768  -12 33 55.10  23.1G 03QX90    G37  C~43qE      
2020 08  12.320530 22 33 46.553  -12 33 56.15        03QX90    G37  C~43qE      

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    -0.30       0.00    -0.10
     2   0.0003      0.00    -0.19       0.00    -0.05
     3   0.0028      0.00     0.01       0.00     0.17
     4   0.1047      0.00     0.76       0.00     0.04
     5   0.1049      0.00     0.36       0.00    -0.14
     6   0.1075      0.00     0.44       0.00    -0.15
     7   0.1618      0.00    -0.54       0.00    -0.17
     8   0.1645      0.00    -0.38       0.00    -0.19
     9   0.7617      0.00     0.44       0.00    -0.17
    10   0.7618      0.00     0.06       0.00    -0.07
    11   1.7888      0.00    -0.26       0.00     0.26
    12   1.7889      0.00    -0.27       0.00     0.33
    13  10.1167      0.00     0.09       0.00     0.28
    14  10.1170      0.00    -0.32       0.00    -0.03
    15  10.1196      0.00     0.05       0.00     0.44
    16  16.9698      0.00     0.14       0.00    -0.33
    17  16.9700      0.00     0.01       0.00    -0.13

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.

03QX90    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.843    43.843    43.843
ecceobj         0.019     0.019     0.019
incobj          3.204     3.204     3.204
qmin           41.815    41.814    41.818
qmax           46.020    46.023    46.020
amean          43.825    43.825    43.825
amin           43.497    43.496    43.498
amax           44.163    44.161    44.164
emean           0.026     0.026     0.026
emin            0.009     0.009     0.009
emax            0.042     0.042     0.042
imean           1.893     1.893     1.893
imin            1.122     1.122     1.122
imax            2.492     2.492     2.492
excite_mean     0.043     0.043     0.043
fracstop        1.000     1.000     1.000
cjmean          3.097     3.097     3.097

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       168.9     168.9     168.9
kozaiamp        180.0     179.9     180.0