The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory.
# Object: 03QG91 # Created Fri May 2 02:36:52 2008 # Orbit generated from Bernstein formalism # Fitting 9 observations of 9 # Arc: 2.68y # First observation: 2003/08/24 # Last observation: 2006/04/28 Preliminary a, adot, b, bdot, g, gdot: 0.000277 0.022608 -0.000004 0.000126 0.024271 0.000000 # Chi-squared of fit: 22.79 DOF: 12 RMS: 0.28 # Min/Max residuals: -0.67 0.40 # Exact a, adot, b, bdot, g, gdot: 1.475611E-05 2.343366E-02 -9.540311E-07 1.356613E-04 2.418293E-02 -5.803338E-04 # Covariance matrix: 4.9552E-13 -1.1878E-12 -7.2814E-16 -1.5269E-14 4.7179E-13 -8.3222E-12 -1.1878E-12 5.3629E-12 -5.2454E-16 7.3599E-14 -1.7727E-12 4.4120E-11 -7.2814E-16 -5.2454E-16 2.7013E-13 -1.2707E-13 -9.6251E-15 -6.3218E-14 -1.5269E-14 7.3599E-14 -1.2707E-13 1.5613E-13 -2.8327E-14 6.0390E-13 4.7179E-13 -1.7727E-12 -9.6251E-15 -2.8327E-14 1.9036E-12 -7.2236E-12 -8.3222E-12 4.4120E-11 -6.3218E-14 6.0390E-13 -7.2236E-12 4.2052E-10 # lat0 lon0 xBary yBary zBary JD0 -2.228799 -50.339795 -0.358017 -0.036912 -0.949500 2452875.513503 # Heliocentric elements and errors Epoch: 2452870.5000 = 2003/08/19 Mean Anomaly: 274.10297 +/- 1.102 Argument of Peri: 7.00600 +/- 1.217 Long of Asc Node: 30.84129 +/- 0.025 Inclination: 2.20799 +/- 0.000 Eccentricity: 0.01597726 +/- 0.0009 Semi-Major Axis: 42.33576628 +/- 0.0148 Time of Perihelion: 2476877.3525 +/- 307.8 Perihelion: 41.65935656 +/- 0.0395 Aphelion: 43.01217600 +/- 0.0397 Period (y) 275.4668 +/- 0.14 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 27.25165385 +/- 0.0015 Ecliptic Y -32.30906437 +/- 0.0018 Ecliptic Z -1.60820364 +/- 0.0001 Ecliptic XDOT 0.00199563 +/- 0.0000 Ecliptic YDOT 0.00173761 +/- 0.0000 Ecliptic ZDOT 0.00001808 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.29792663 +/- 0.0017 Geocenter to KBO 41.35147475 +/- 0.0024 # Hcoef: 7.07
The following table shows the complete astrometric record for 03QG91. 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 (03QG91) followed by the observatory code and reference code for the source of the astrometry.
2003 08 24.01276 20 50 56.04 -19 58 44.3 22.7R 03QG91 807 Ci4137 2003 08 24.11630 20 50 55.56 -19 58 46.2 03QG91 807 Ci4137 2003 08 25.02086 20 50 51.49 -19 59 01.1 03QG91 807 Ci4137 2003 10 23.09315 20 48 18.64 -20 06 26.9 23.2R 03QG91 695 Cj4699 2003 10 24.09751 20 48 18.63 -20 06 22.7 03QG91 695 Cj4699 2004 07 16.11984 20 59 25.47 -19 23 56.9 22.8R 03QG91 807 Cr3580 2004 07 16.22312 20 59 25.04 -19 23 59.3 03QG91 807 Cr3580 2006 04 27.34719 21 12 32.85 -18 23 03.5 23.5R 03QG91 807 Cr3580 2006 04 28.36019 21 12 34.58 -18 22 58.1 03QG91 807 Cr3580
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 0.12 0.00 0.22 2 0.0003 -7.03 0.00 0.00 0.07 3 0.0028 -66.30 -0.10 1.15 0.04 4 0.1645 -2260.90 -0.23 149.33 -0.67 5 0.1672 -2259.91 0.21 153.41 0.14 6 0.8956 7494.57 -0.27 19.30 0.38 7 0.8959 7488.05 0.27 18.71 -0.14 8 2.6758 19301.03 0.24 262.60 -0.46 9 2.6786 19326.36 -0.24 260.36 0.40
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.
03QG91 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 42.599 42.599 42.599 ecceobj 0.021 0.021 0.021 incobj 2.207 2.207 2.207 qmin 40.393 40.390 40.396 qmax 44.720 44.711 44.727 amean 42.602 42.602 42.602 amin 42.279 42.277 42.282 amax 42.929 42.929 42.927 emean 0.029 0.029 0.029 emin 0.007 0.007 0.007 emax 0.045 0.045 0.045 imean 1.812 1.813 1.812 imin 0.367 0.367 0.367 imax 2.674 2.674 2.674 fracstop 1.000 1.000 1.000 cjmean 3.083 3.083 3.083 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 177.5 177.6 177.5 kozaiamp 180.0 180.0 180.0