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: 03QX91 # Created Sun Dec 22 02:08:32 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 16 observations of 16 # Arc: 18.11y # First observation: 2003/08/23 # Last observation: 2021/10/03 # Chi-squared of fit: 8.37 DOF: 26 RMS: 0.13 # Min/Max residuals: -0.30 0.28 # Exact a, adot, b, bdot, g, gdot: 1.715996E-05 3.356970E-02 9.383726E-06 1.744836E-02 3.114226E-02 2.772438E-03 # Covariance matrix: 1.9319E-13 -4.0956E-14 2.0771E-14 -1.6349E-14 -3.5021E-15 -4.8311E-14 -4.0956E-14 2.6362E-14 -1.6552E-14 1.2964E-14 1.7400E-14 3.8222E-14 2.0771E-14 -1.6552E-14 1.6624E-13 -1.9472E-14 -3.3465E-15 -2.6230E-14 -1.6349E-14 1.2964E-14 -1.9472E-14 8.6534E-15 1.0317E-15 2.0660E-14 -3.5021E-15 1.7400E-14 -3.3465E-15 1.0317E-15 3.6360E-13 9.2352E-16 -4.8311E-14 3.8222E-14 -2.6230E-14 2.0660E-14 9.2352E-16 6.1072E-14 # lat0 lon0 xBary yBary zBary JD0 -4.126131 -15.275936 0.265467 -0.070483 -0.977779 2452874.747293 # Heliocentric elements and errors Epoch: 2452874.5000 = 2003/08/23 Mean Anomaly: 11.36855 +/- 0.003 Argument of Peri: 332.07106 +/- 0.004 Long of Asc Node: 351.92023 +/- 0.000 Inclination: 27.73100 +/- 0.000 Eccentricity: 0.24730168 +/- 0.0001 Semi-Major Axis: 43.46671122 +/- 0.0048 Time of Perihelion: 2449569.0061 +/- 1.1 Perihelion: 32.71732039 +/- 0.0047 Aphelion: 54.21610206 +/- 0.0067 Period (y) 286.5783 +/- 0.05 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 31.76898521 +/- 0.0006 Ecliptic Y -8.94842590 +/- 0.0002 Ecliptic Z -2.31015407 +/- 0.0000 Ecliptic XDOT 0.00111328 +/- 0.0000 Ecliptic YDOT 0.00274814 +/- 0.0000 Ecliptic ZDOT 0.00151262 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 33.08590137 +/- 0.0006 Geocenter to KBO 32.11070128 +/- 0.0006 # Hcoef: 8.46
The following table shows the complete astrometric record for 03QX91. 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 (03QX91) followed by the observatory code and reference code for the source of the astrometry.
2003 08 23.24655 23 10 11.28 -09 49 10.2 22.5R 03QX91 807 Ci4137 2003 08 24.27332 23 10 05.48 -09 49 37.5 03QX91 807 Ci4137 2003 08 24.36527 23 10 04.95 -09 49 39.9 03QX91 807 Ci4137 2003 10 23.12616 23 04 42.08 -10 10 16.6 03QX91 304 Ci9429 2003 10 23.17031 23 04 41.92 -10 10 16.8 03QX91 304 Ci9429 2004 08 13.18163 23 16 34.13 -08 05 16.9 22.6R 03QX91 807 Cr5111 2004 08 13.28838 23 16 33.57 -08 05 19.7 03QX91 807 Cr5111 2006 06 20.30997 23 29 47.08 -04 39 17.5 23.6R 03QX91 304 Cr5111 2006 06 20.41475 23 29 47.10 -04 39 16.4 03QX91 304 Cr5111 2006 07 28.34581 23 28 35.75 -04 41 41.3 23.9R 03QX91 304 Cr5531 2006 07 28.38623 23 28 35.59 -04 41 41.9 03QX91 304 Cr5531 2014 10 22.16373 00 02 56.42 +07 32 39.4 23.9R 03QX91 G37 C~1BxD 2014 10 22.27064 00 02 55.87 +07 32 36.2 03QX91 G37 C~1BxD 2021 10 03.275200 00 40 19.032 +17 57 35.02 24.3G 03QX91 G37 C~553k 2021 10 03.311950 00 40 18.817 +17 57 34.03 03QX91 G37 C~553k 2021 10 03.348600 00 40 18.616 +17 57 33.19 03QX91 G37 C~553k
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 0.02 0.00 -0.11
2 0.0028 0.00 0.00 0.00 -0.08
3 0.0031 0.00 -0.01 0.00 -0.04
4 0.1667 0.00 -0.13 0.00 -0.02
5 0.1668 0.00 0.14 0.00 0.12
6 0.9745 0.00 0.22 0.00 0.12
7 0.9748 0.00 0.14 0.00 -0.08
8 2.8256 0.00 -0.27 0.00 -0.08
9 2.8259 0.00 0.02 0.00 0.14
10 2.9298 0.00 0.09 0.00 -0.03
11 2.9299 0.00 -0.01 0.00 -0.03
12 11.1647 0.00 -0.08 0.00 0.28
13 11.1650 0.00 -0.30 0.00 0.07
14 18.1137 0.00 0.03 0.00 -0.06
15 18.1138 0.00 0.01 0.00 -0.13
16 18.1139 0.00 0.20 0.00 -0.05
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.
03QX91 quality flag:3 Type: 7:4EEE 7:4EEE 7:4EEE Type: 7:4EII 7:4EII 7:4EII axisobj 43.931 43.931 43.931 ecceobj 0.255 0.255 0.255 incobj 27.629 27.629 27.629 qmin 30.977 30.978 30.976 qmax 56.966 56.972 56.970 amean 43.724 43.724 43.724 amin 43.318 43.318 43.318 amax 44.211 44.211 44.211 emean 0.222 0.222 0.222 emin 0.131 0.131 0.131 emax 0.291 0.291 0.291 imean 28.855 28.855 28.856 imin 27.125 27.126 27.125 imax 30.872 30.872 30.872 excite_mean 0.534 0.534 0.534 fracstop 1.000 1.000 1.000 cjmean 2.742 2.742 2.742 libcent 0 179.1 179.2 179.0 libamp 0 86.1 86.2 86.0 libcent 1 178.0 178.0 178.0 libamp 1 111.3 111.3 111.3 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 205.3 205.3 205.3 kozaiamp 180.0 180.0 180.0