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: 03QD91 # Created Sun Dec 22 02:08:31 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 15 observations of 15 # Arc: 21.19y # First observation: 2003/08/23 # Last observation: 2024/11/01 # Chi-squared of fit: 12.57 DOF: 24 RMS: 0.16 # Min/Max residuals: -0.42 0.46 # Exact a, adot, b, bdot, g, gdot: 1.507569E-05 2.403508E-02 1.001104E-06 -2.517814E-04 2.441346E-02 3.812946E-04 # Covariance matrix: 2.3698E-13 -6.4916E-14 -1.4817E-15 5.1220E-16 1.4943E-13 -1.2223E-13 -6.4916E-14 4.8924E-14 1.0081E-15 -4.5147E-16 -8.6509E-14 1.0087E-13 -1.4817E-15 1.0081E-15 1.6527E-13 -9.1219E-15 -4.0937E-15 2.3272E-15 5.1220E-16 -4.5147E-16 -9.1219E-15 1.2754E-15 6.9567E-16 -9.4507E-16 1.4943E-13 -8.6509E-14 -4.0937E-15 6.9567E-16 5.1875E-13 -2.1400E-13 -1.2223E-13 1.0087E-13 2.3272E-15 -9.4507E-16 -2.1400E-13 2.1615E-13 # lat0 lon0 xBary yBary zBary JD0 -2.192207 -24.868296 0.100194 -0.038616 -1.009955 2452874.642723 # Heliocentric elements and errors Epoch: 2452874.5000 = 2003/08/23 Mean Anomaly: 26.10385 +/- 0.068 Argument of Peri: 226.63067 +/- 0.071 Long of Asc Node: 80.81213 +/- 0.002 Inclination: 2.22366 +/- 0.000 Eccentricity: 0.02809935 +/- 0.0001 Semi-Major Axis: 43.04637380 +/- 0.0057 Time of Perihelion: 2445394.4357 +/- 19.4 Perihelion: 41.83679865 +/- 0.0070 Aphelion: 44.25594894 +/- 0.0072 Period (y) 282.4315 +/- 0.06 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 38.00807173 +/- 0.0011 Ecliptic Y -17.72462573 +/- 0.0005 Ecliptic Z -1.56680091 +/- 0.0000 Ecliptic XDOT 0.00116603 +/- 0.0000 Ecliptic YDOT 0.00242226 +/- 0.0000 Ecliptic ZDOT -0.00002968 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.96701161 +/- 0.0010 Geocenter to KBO 40.96103298 +/- 0.0012 # Hcoef: 7.18
The following table shows the complete astrometric record for 03QD91. 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 (03QD91) followed by the observatory code and reference code for the source of the astrometry.
2003 08 23.14198 22 31 07.42 -11 40 07.2 22.2R 03QD91 807 Ci4137 2003 08 23.21118 22 31 07.09 -11 40 09.3 03QD91 807 Ci4137 2003 08 24.22582 22 31 02.48 -11 40 36.2 03QD91 807 Ci4137 2003 10 01.39537 22 28 17.63 -11 56 04.0 23.5R 03QD91 568 Ci6964 2003 10 02.41836 22 28 13.89 -11 56 23.6 03QD91 568 Ci6964 2004 07 17.21052 22 38 43.24 -10 55 25.9 22.1R 03QD91 807 Cl8405 2004 07 17.31127 22 38 42.94 -10 55 28.0 03QD91 807 Cl8405 2004 10 10.18365 22 32 57.21 -11 29 33.8 23.0R 03QD91 695 Cl8405 2004 10 10.31582 22 32 56.78 -11 29 36.5 03QD91 695 Cl8405 2004 11 10.14711 22 31 53.01 -11 34 22.1 23.0R 03QD91 695 Cr8411 2014 07 29.39522 23 29 04.47 -05 47 58.6 24.1R 03QD91 G37 C~16aI 2014 07 29.44326 23 29 04.31 -05 47 59.6 03QD91 G37 C~16aI 2024 11 01.090880 00 12 32.961 -01 03 08.72 24.0G 03QD91 G37 C~8SEB 2024 11 01.140170 00 12 32.792 -01 03 09.78 03QD91 G37 C~8SEB 2024 11 01.186410 00 12 32.627 -01 03 10.84 03QD91 G37 C~8SEB
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 0.19 0.00 -0.19
2 0.0002 0.00 0.02 0.00 -0.42
3 0.0030 0.00 0.00 0.00 -0.08
4 0.1075 0.00 -0.17 0.00 -0.12
5 0.1103 0.00 0.10 0.00 0.10
6 0.9009 0.00 -0.10 0.00 0.06
7 0.9012 0.00 0.13 0.00 0.04
8 1.1336 0.00 0.03 0.00 0.46
9 1.1339 0.00 0.11 0.00 -0.06
10 1.2184 0.00 -0.16 0.00 0.10
11 10.9329 0.00 0.07 0.00 0.15
12 10.9331 0.00 -0.23 0.00 0.15
13 21.1936 0.00 0.01 0.00 0.03
14 21.1937 0.00 0.06 0.00 -0.04
15 21.1938 0.00 0.01 0.00 -0.18
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.
03QD91 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.445 43.445 43.445 ecceobj 0.036 0.036 0.036 incobj 2.225 2.225 2.225 qmin 41.119 41.118 41.119 qmax 45.677 45.678 45.677 amean 43.305 43.305 43.305 amin 42.978 42.978 42.977 amax 43.647 43.652 43.643 emean 0.030 0.030 0.030 emin 0.010 0.010 0.010 emax 0.047 0.047 0.047 imean 0.831 0.831 0.831 imin 0.470 0.471 0.470 imax 1.136 1.136 1.136 excite_mean 0.034 0.034 0.034 fracstop 1.000 1.000 1.000 cjmean 3.092 3.092 3.092 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 178.3 178.2 178.2 kozaiamp 180.0 179.9 180.0