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: 03QU90
# Created Wed Dec 25 02:08:25 2024
# Orbit generated from Bernstein formalism
# Fitting 9 observations of 9
# Arc: 0.97y
# First observation: 2003/08/23
# Last observation: 2004/08/12
Preliminary a, adot, b, bdot, g, gdot:
-0.000011 0.022878 0.000000 -0.000166 0.023587 0.000000
# Chi-squared of fit: 7.32 DOF: 12 RMS: 0.16
# Min/Max residuals: -0.27 0.40
# Exact a, adot, b, bdot, g, gdot:
1.647806E-05 2.287311E-02 -4.853459E-08 -1.660006E-04 2.378785E-02 1.381610E-03
# Covariance matrix:
5.2083E-13 4.4268E-12 1.0518E-14 -4.1865E-14 2.0866E-12 2.0314E-10
4.4268E-12 6.7003E-10 9.8056E-13 -5.3197E-12 2.0798E-10 2.7093E-08
1.0518E-14 9.8056E-13 2.5565E-13 -3.2983E-13 3.1421E-13 3.9883E-11
-4.1865E-14 -5.3197E-12 -3.2983E-13 1.1994E-12 -1.6648E-12 -2.1567E-10
2.0866E-12 2.0798E-10 3.1421E-13 -1.6648E-12 6.6265E-11 8.4525E-09
2.0314E-10 2.7093E-08 3.9883E-11 -2.1567E-10 8.4525E-09 1.0979E-06
# lat0 lon0 xBary yBary zBary JD0
1.820609 -28.347151 0.037555 0.032295 -1.014426 2452874.708073
# Heliocentric elements and errors
Epoch: 2452870.5000 = 2003/08/19
Mean Anomaly: 80.69694 +/- 3.879
Argument of Peri: 15.44012 +/- 0.763
Long of Asc Node: 228.68308 +/- 0.102
Inclination: 1.82402 +/- 0.001
Eccentricity: 0.05924523 +/- 0.0461
Semi-Major Axis: 43.31283809 +/- 0.2808
Time of Perihelion: 2429531.7311 +/- 1098.8
Perihelion: 40.74675911 +/- 2.0133
Aphelion: 45.87891706 +/- 2.0179
Period (y) 285.0580 +/- 2.77
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 37.85157704 +/- 0.0126
Ecliptic Y -20.46094011 +/- 0.0068
Ecliptic Z 1.33555443 +/- 0.0005
Ecliptic XDOT 0.00138512 +/- 0.0001
Ecliptic YDOT 0.00223542 +/- 0.0001
Ecliptic ZDOT -0.00001387 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 43.04852681 +/- 0.0116
Geocenter to KBO 42.03826701 +/- 0.0144
# Hcoef: 7.15
The following table shows the complete astrometric record for 03QU90. 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 (03QU90) followed by the observatory code and reference code for the source of the astrometry.
2003 08 23.20733 22 12 01.87 -09 11 06.6 22.5R 03QU90 807 Ci4137 2003 08 24.10783 22 11 57.89 -09 11 29.0 03QU90 807 Ci4137 2003 08 24.20369 22 11 57.46 -09 11 31.7 03QU90 807 Ci4137 2003 10 01.37300 22 09 21.51 -09 26 41.3 23.8R 03QU90 568 Ci6964 2003 10 02.36925 22 09 18.21 -09 27 02.1 03QU90 568 Ci6964 2003 10 24.11947 22 08 22.53 -09 33 00.4 23.4R 03QU90 695 Cj4699 2003 10 24.24205 22 08 22.31 -09 33 01.6 03QU90 695 Cj4699 2004 08 12.27681 22 17 43.638 -08 39 32.84 22.9R 03QU90 807 2004 08 12.34629 22 17 43.351 -08 39 34.49 03QU90 807
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 -0.26 0.00 -0.01
2 0.0025 -63.05 0.16 -0.05 0.02
3 0.0027 -69.96 0.12 -0.31 -0.27
4 0.1072 -2550.98 0.07 -34.58 0.40
5 0.1100 -2604.01 -0.11 -36.82 -0.13
6 0.1695 -3501.38 -0.07 -81.74 -0.11
7 0.1698 -3504.85 0.08 -81.72 0.15
8 0.9721 5408.07 -0.12 -35.84 0.02
9 0.9723 5403.51 0.12 -35.86 -0.06
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.
03QU90 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.684 45.406 43.451 ecceobj 0.058 0.196 0.012 incobj 1.823 1.822 1.824 qmin 40.359 35.822 41.817 qmax 47.025 55.283 45.008 amean 43.576 45.304 43.331 amin 43.239 44.900 43.007 amax 43.934 45.786 43.667 emean 0.053 0.188 0.016 emin 0.035 0.170 0.000 emax 0.070 0.208 0.031 imean 3.576 4.271 3.503 imin 2.791 2.962 2.694 imax 4.312 5.544 4.232 excite_mean 0.082 0.203 0.063 fracstop 1.000 1.000 1.000 cjmean 3.088 3.066 3.089 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 172.8 178.5 187.3 kozaiamp 179.9 179.9 180.0