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: 03QD112 # Created Tue Dec 31 02:08:28 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 18 observations of 18 # Arc: 5.23y # First observation: 2002/08/20 # Last observation: 2007/11/11 # Chi-squared of fit: 70.44 DOF: 30 RMS: 0.35 # Min/Max residuals: -0.91 0.81 # Exact a, adot, b, bdot, g, gdot: 3.366665E-05 2.128006E-01 1.240259E-05 5.503750E-02 1.048978E-01 1.083785E-01 # Covariance matrix: 4.5351E-13 -3.4004E-13 4.1917E-14 -7.7783E-14 1.3046E-13 -4.2222E-13 -3.4004E-13 6.5417E-13 -8.8274E-14 1.6011E-13 2.4742E-13 8.5299E-13 4.1917E-14 -8.8274E-14 2.7019E-13 -1.1672E-13 -2.3535E-14 -1.3006E-13 -7.7783E-14 1.6011E-13 -1.1672E-13 1.0205E-13 3.8321E-14 2.3716E-13 1.3046E-13 2.4742E-13 -2.3535E-14 3.8321E-14 6.8201E-13 1.8475E-13 -4.2222E-13 8.5299E-13 -1.3006E-13 2.3716E-13 1.8475E-13 1.2692E-12 # lat0 lon0 xBary yBary zBary JD0 -4.344513 -12.971632 0.347661 -0.072288 -0.950791 2452506.957063 # Heliocentric elements and errors Epoch: 2452506.5000 = 2002/08/20 Mean Anomaly: 18.42798 +/- 0.002 Argument of Peri: 274.01221 +/- 0.002 Long of Asc Node: 0.61847 +/- 0.000 Inclination: 14.50909 +/- 0.000 Eccentricity: 0.58080769 +/- 0.0000 Semi-Major Axis: 18.96556485 +/- 0.0012 Time of Perihelion: 2450962.2333 +/- 0.2 Perihelion: 7.95021896 +/- 0.0006 Aphelion: 29.98091075 +/- 0.0020 Period (y) 82.5956 +/- 0.01 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 10.11400418 +/- 0.0001 Ecliptic Y -2.68101715 +/- 0.0000 Ecliptic Z -0.72202378 +/- 0.0000 Ecliptic XDOT 0.00409365 +/- 0.0000 Ecliptic YDOT 0.00475215 +/- 0.0000 Ecliptic ZDOT 0.00121829 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 10.48805195 +/- 0.0001 Geocenter to KBO 9.53296069 +/- 0.0001 # Hcoef: 10.68
The following table shows the complete astrometric record for 03QD112. 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 (03QD112) followed by the observatory code and reference code for the source of the astrometry.
2002 08 20.45632 23 19 06.68 -09 07 18.6 20.2R 03QD112 644 Ck9589 2002 08 29.49175 23 16 48.46 -09 17 52.7 20.2R 03QD112 644 Ck9589 2002 09 15.44024 23 12 15.04 -09 37 13.5 20.6R 03QD112 644 Ck9589 2003 08 26.29534 23 53 52.95 -02 12 15.2 20.3R 03QD112 807 Ci4592 2003 08 26.40006 23 53 51.56 -02 12 21.4 03QD112 807 Ci4592 2003 09 03.13917 23 52 05.71 -02 20 33.3 21.3R 03QD112 304 Ci4592 2003 09 03.26274 23 52 03.91 -02 20 42.3 03QD112 304 Ci4592 2003 10 22.15454 23 40 35.22 -03 11 33.7 21.5R 03QD112 695 Cj4700 2003 10 22.24844 23 40 34.13 -03 11 37.6 03QD112 695 Cj4700 2003 12 17.21507 23 37 28.00 -03 03 49.7 22.0R 03QD112 568 Ck9589 2003 12 17.25579 23 37 28.20 -03 03 47.2 03QD112 568 Ck9589 2005 09 28.27787 00 41 21.30 +07 53 42.0 22.0r 03QD112 705 C~0nK9 2005 09 28.278368 00 41 21.32 +07 53 41.5 21.5V 03QD112 645 C~262W 2005 09 28.279198 00 41 21.30 +07 53 41.5 21.5V 03QD112 645 C~262W 2005 09 28.28119 00 41 21.25 +07 53 41.2 03QD112 705 C~0nK9 2005 09 28.281685 00 41 21.26 +07 53 41.2 22.3V 03QD112 645 C~262W 2007 11 11.26234 01 14 23.00 +14 39 52.8 22.4R 03QD112 688 Cw6790 2007 11 11.32366 01 14 22.32 +14 39 49.9 03QD112 688 Cw6790
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 -0.91
2 0.0247 0.00 -0.50 0.00 0.32
3 0.0711 0.00 0.37 0.00 0.26
4 1.0153 0.00 -0.24 0.00 -0.18
5 1.0156 0.00 -0.07 0.00 -0.04
6 1.0368 0.00 0.44 0.00 0.62
7 1.0371 0.00 0.27 0.00 -0.19
8 1.1710 0.00 -0.07 0.00 0.43
9 1.1712 0.00 -0.19 0.00 0.47
10 1.3245 0.00 -0.00 0.00 0.07
11 1.3246 0.00 -0.13 0.00 0.02
12 3.1070 0.00 -0.08 0.00 0.10
13 3.1070 0.00 0.33 0.00 -0.36
14 3.1070 0.00 0.20 0.00 -0.31
15 3.1070 0.00 -0.15 0.00 -0.48
16 3.1070 0.00 0.10 0.00 -0.45
17 5.2260 0.00 0.13 0.00 -0.07
18 5.2262 0.00 -0.35 0.00 0.81
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.
03QD112 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 19.100 19.100 19.100 ecceobj 0.583 0.583 0.583 incobj 14.492 14.492 14.492 qmin 7.934 7.934 7.934 qmax 31.956 30.479 31.018 amean 19.226 18.923 19.114 amin 18.847 18.429 18.700 amax 20.039 19.214 19.493 emean 0.581 0.577 0.577 emin 0.572 0.561 0.560 emax 0.595 0.586 0.591 imean 15.841 15.458 15.869 imin 14.846 14.846 14.846 imax 16.524 16.263 17.146 excite_mean 0.642 0.636 0.639 fracstop 0.001 0.000 0.001 cjmean 2.813 2.836 2.822 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 283.4 279.9 279.5 kozaiamp 8.1 5.9 5.5