Orbit Fit and Astrometric record for 03QT91

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: 03QT91    
# Created Tue Oct 24 01:37:24 2017
# Orbit generated from Bernstein formalism
# Fitting   14 observations of   14
# Arc:  11.16y
# First observation: 2003/08/25
#  Last observation: 2014/10/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000273   0.025647   0.000001  -0.000078   0.025440   0.000000
# Chi-squared of fit:    17.50 DOF:   22 RMS:  0.20
# Min/Max residuals:    -0.48    0.31
# Exact a, adot, b, bdot, g, gdot:
  1.624462E-05  2.549724E-02 -5.420141E-07 -7.799940E-05  2.504799E-02  1.113871E-03
# Covariance matrix:
  2.1379E-13 -7.1808E-14 -1.3776E-16  1.7437E-16  1.8303E-14 -2.1113E-13
 -7.1808E-14  1.0397E-13  1.9514E-16 -2.8949E-16  1.2195E-13  3.4362E-13
 -1.3776E-16  1.9514E-16  1.6949E-13 -2.1123E-14  8.0396E-17  7.5463E-16
  1.7437E-16 -2.8949E-16 -2.1123E-14  6.9330E-15 -2.5732E-16 -1.0663E-15
  1.8303E-14  1.2195E-13  8.0396E-17 -2.5732E-16  5.3045E-13  2.8630E-13
 -2.1113E-13  3.4362E-13  7.5463E-16 -1.0663E-15  2.8630E-13  1.2730E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.072242  -12.188542    0.283312   -0.001163   -0.974770  2452876.862803
# Heliocentric elements and errors
Epoch:              2452870.5000  =  2003/08/19
Mean Anomaly:           24.72290 +/-     0.035
Argument of Peri:      173.34699 +/-     0.049
Long of Asc Node:      145.19251 +/-     0.026
Inclination:             0.18661 +/-     0.000
Eccentricity:         0.07862853 +/-    0.0001
Semi-Major Axis:     43.98313707 +/-    0.0051
Time of Perihelion: 2445553.6417 +/-      10.2
Perihelion:          40.52480784 +/-    0.0057
Aphelion:            47.44146631 +/-    0.0064
Period (y)              291.7007 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           39.91368354 +/-    0.0011
Ecliptic Y           -8.90746161 +/-    0.0002
Ecliptic Z           -0.05038491 +/-    0.0000
Ecliptic XDOT         0.00070215 +/-    0.0000
Ecliptic YDOT         0.00269270 +/-    0.0000
Ecliptic ZDOT        -0.00000851 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.89556877 +/-    0.0011
Geocenter to KBO     39.92336329 +/-    0.0012
# Hcoef:  6.77

The following table shows the complete astrometric record for 03QT91. 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 (03QT91) followed by the observatory code and reference code for the source of the astrometry.

2003 08  25.36206  23 15 16.55   -04 53 02.5   22.0R 03QT91    807  Ci4137      
2003 08  26.26631  23 15 12.64   -04 53 27.4         03QT91    807  Ci4137      
2003 08  26.37140  23 15 12.16   -04 53 30.4         03QT91    807  Ci4137      
2003 10  23.17707  23 11 10.86   -05 18 55.9   22.8R 03QT91    304  Ci9429      
2003 10  23.20064  23 11 10.81   -05 18 56.5         03QT91    304  Ci9429      
2004 07  16.37831  23 22 51.53   -04 05 00.9   22.1R 03QT91    807  Cl4360      
2004 07  16.43063  23 22 51.43   -04 05 01.6         03QT91    807  Cl4360      
2004 08  23.15117  23 20 45.80   -04 18 27.5   23.0R 03QT91    304  Cl4360      
2004 08  23.28649  23 20 45.22   -04 18 31.1         03QT91    304  Cl4360      
2008 10  30.240455 23 37 26.22   -02 32 34.2         03QT91    645  C~1Ghp      
2008 10  30.241284 23 37 26.22   -02 32 34.2         03QT91    645  C~1Ghp      
2008 10  30.243772 23 37 26.21   -02 32 34.3         03QT91    645  C~1Ghp      
2014 10  22.16685  00 09 31.68   +00 54 13.5   23.0R 03QT91    G37  C~1BxD      
2014 10  22.27376  00 09 31.26   +00 54 10.8         03QT91    G37  C~1BxD      

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     0.10
  2   0.0025    -63.52     0.22      -0.12     0.08
  3   0.0028    -71.30    -0.01      -0.09     0.08
  4   0.1610  -3986.41    -0.21      -0.94     0.20
  5   0.1611  -3987.33     0.07      -1.20    -0.08
  6   0.8926   7391.98    -0.22     -11.72     0.05
  7   0.8927   7390.32     0.01     -11.77    -0.02
  8   0.9960   5343.46     0.02     -15.78     0.15
  9   0.9964   5334.06     0.12     -15.69     0.19
 10   5.1824  21692.15    -0.01     -81.30    -0.44
 11   5.1824  21692.15     0.04     -81.30    -0.44
 12   5.1824  21691.97    -0.02     -81.33    -0.48
 13  11.1589  54241.00    -0.08    -179.08     0.31
 14  11.1592  54233.67     0.08    -179.05     0.28

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.

03QT91    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.451    44.466    44.435
ecceobj         0.087     0.087     0.087
incobj          0.187     0.187     0.187
qmin           39.816    39.840    39.829
qmax           48.900    48.906    48.786
amean          44.226    44.242    44.211
amin           43.884    43.890    43.863
amax           44.598    44.621    44.579
emean           0.080     0.081     0.080
emin            0.065     0.065     0.064
emax            0.096     0.096     0.095
imean           1.849     1.846     1.851
imin            1.126     1.127     1.126
imax            2.456     2.453     2.465
excite_mean     0.087     0.087     0.087
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       179.9     179.9     180.1
kozaiamp        180.0     179.9     180.0