Orbit Fit and Astrometric record for 03QT90

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: 03QT90    
# Created Sun Dec  5 02:09:35 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     12 observations of     12
# Arc:  13.20y
# First observation: 2003/08/23
#  Last observation: 2016/11/05
# Chi-squared of fit:    15.15 DOF:     18 RMS:  0.20
# Min/Max residuals:    -0.43    0.54
# Exact a, adot, b, bdot, g, gdot:
  1.411591E-05  2.000115E-02 -9.924197E-07 -7.672370E-04  2.217318E-02 -5.283110E-04
# Covariance matrix:
  6.0102E-13  9.8346E-14 -4.3437E-16 -4.7270E-15  5.0696E-13  4.5138E-13
  9.8346E-14  3.6853E-13  1.3769E-15 -1.4575E-14  3.8508E-13  1.4283E-12
 -4.3437E-16  1.3769E-15  3.7184E-13 -2.9283E-14 -3.9432E-16  5.6244E-15
 -4.7270E-15 -1.4575E-14 -2.9283E-14  4.0818E-15 -1.4636E-14 -5.7124E-14
  5.0696E-13  3.8508E-13 -3.9432E-16 -1.4636E-14  1.1574E-12  1.4103E-12
  4.5138E-13  1.4283E-12  5.6244E-15 -5.7124E-14  1.4103E-12  5.6009E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.034105  -13.812655    0.291484   -0.017511   -0.972757  2452874.682813
# Heliocentric elements and errors
Epoch:              2452874.5000  =  2003/08/23
Mean Anomaly:          214.52665 +/-     0.120
Argument of Peri:      353.99528 +/-     0.110
Long of Asc Node:      141.19450 +/-     0.002
Inclination:             2.42759 +/-     0.000
Eccentricity:         0.06351266 +/-    0.0001
Semi-Major Axis:     43.72898606 +/-    0.0067
Time of Perihelion: 2495555.3913 +/-      38.2
Perihelion:          40.95164202 +/-    0.0077
Aphelion:            46.50633010 +/-    0.0085
Period (y)              289.1760 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           44.66071646 +/-    0.0021
Ecliptic Y          -11.27675105 +/-    0.0005
Ecliptic Z           -0.81398986 +/-    0.0000
Ecliptic XDOT         0.00051936 +/-    0.0000
Ecliptic YDOT         0.00240851 +/-    0.0000
Ecliptic ZDOT        -0.00009337 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.06961372 +/-    0.0021
Geocenter to KBO     45.09957647 +/-    0.0022
# Hcoef:  6.74

The following table shows the complete astrometric record for 03QT90. 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 (03QT90) followed by the observatory code and reference code for the source of the astrometry.

2003 08  23.18207  23 10 46.15   -06 24 08.8   22.1R 03QT90    807  Ci4137      
2003 08  23.25045  23 10 45.85   -06 24 10.1         03QT90    807  Ci4137      
2003 08  24.27753  23 10 41.85   -06 24 37.0         03QT90    807  Ci4137      
2003 10  23.17487  23 06 56.02   -06 48 18.8   23.0R 03QT90    304  Ci9429      
2003 10  23.19823  23 06 55.95   -06 48 19.1         03QT90    304  Ci9429      
2014 10  23.19731  23 54 18.53   -02 14 55.5   23.6r 03QT90    W84  C~3cWO      
2015 11  07.05344  23 57 52.42   -01 54 03.9   23.9r 03QT90    W84  C~3cWO      
2016 09  11.23186  00 05 42.84   -01 05 50.6   23.0i 03QT90    W84  C~3cWO      
2016 09  22.10524  00 04 58.41   -01 10 46.5   23.2r 03QT90    W84  C~3cWO      
2016 10  05.15688  00 04 04.71   -01 16 37.8   23.4r 03QT90    W84  C~3cWO      
2016 11  05.05885  00 02 14.70   -01 28 11.5   23.3r 03QT90    W84  C~3cWO      
2016 11  05.06023  00 02 14.70   -01 28 11.7   23.0i 03QT90    W84  C~3cWO      

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    -0.01       0.00     0.10
     2   0.0002      0.00    -0.43       0.00     0.54
     3   0.0030      0.00     0.03       0.00    -0.14
     4   0.1670      0.00     0.24       0.00    -0.28
     5   0.1671      0.00     0.18       0.00    -0.20
     6  11.1677      0.00     0.23       0.00    -0.04
     7  12.2077      0.00    -0.17       0.00    -0.10
     8  13.0542      0.00     0.08       0.00     0.04
     9  13.0840      0.00     0.12       0.00     0.20
    10  13.1197      0.00    -0.09       0.00     0.01
    11  13.2043      0.00    -0.08       0.00     0.04
    12  13.2043      0.00    -0.02       0.00    -0.14

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.

03QT90    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.142    44.142    44.142
ecceobj         0.056     0.056     0.056
incobj          2.420     2.420     2.420
qmin           40.274    40.273    40.277
qmax           47.838    47.844    47.831
amean          43.958    43.958    43.958
amin           43.615    43.617    43.615
amax           44.322    44.321    44.323
emean           0.064     0.064     0.064
emin            0.047     0.047     0.047
emax            0.080     0.080     0.079
imean           1.978     1.978     1.978
imin            1.164     1.163     1.164
imax            2.708     2.708     2.709
excite_mean     0.073     0.073     0.073
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       187.5     187.5     187.5
kozaiamp        180.0     180.0     180.0