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: 03QF91 # Created Sun Dec 22 02:08:31 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 19 observations of 19 # Arc: 18.11y # First observation: 2003/08/23 # Last observation: 2021/10/03 # Chi-squared of fit: 21.62 DOF: 32 RMS: 0.19 # Min/Max residuals: -0.40 0.36 # Exact a, adot, b, bdot, g, gdot: 1.537440E-05 2.405649E-02 -8.460514E-07 2.156391E-04 2.446199E-02 7.008709E-04 # Covariance matrix: 2.0329E-13 -1.6710E-14 -9.6027E-16 -5.0566E-17 1.3365E-13 -2.2055E-14 -1.6710E-14 3.9423E-14 -5.4395E-16 3.5989E-16 4.3464E-14 8.5714E-14 -9.6027E-16 -5.4395E-16 1.3827E-13 -8.3713E-15 -3.0579E-15 -1.1580E-15 -5.0566E-17 3.5989E-16 -8.3713E-15 1.0846E-15 4.7080E-16 8.0305E-16 1.3365E-13 4.3464E-14 -3.0579E-15 4.7080E-16 3.7316E-13 8.9468E-14 -2.2055E-14 8.5714E-14 -1.1580E-15 8.0305E-16 8.9468E-14 1.9180E-13 # lat0 lon0 xBary yBary zBary JD0 -2.174061 -16.331177 0.248654 -0.037309 -0.984027 2452874.670673 # Heliocentric elements and errors Epoch: 2452874.5000 = 2003/08/23 Mean Anomaly: 45.00137 +/- 0.096 Argument of Peri: 235.75025 +/- 0.103 Long of Asc Node: 60.03011 +/- 0.002 Inclination: 2.18163 +/- 0.000 Eccentricity: 0.03052530 +/- 0.0000 Semi-Major Axis: 42.76321182 +/- 0.0041 Time of Perihelion: 2440106.3748 +/- 27.3 Perihelion: 41.45785214 +/- 0.0046 Aphelion: 44.06857149 +/- 0.0048 Period (y) 279.6493 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 40.07456367 +/- 0.0010 Ecliptic Y -11.99794074 +/- 0.0003 Ecliptic Z -1.55083271 +/- 0.0000 Ecliptic XDOT 0.00082793 +/- 0.0000 Ecliptic YDOT 0.00255582 +/- 0.0000 Ecliptic ZDOT 0.00002132 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.86078296 +/- 0.0009 Geocenter to KBO 40.87976487 +/- 0.0010 # Hcoef: 7.39
The following table shows the complete astrometric record for 03QF91. 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 (03QF91) followed by the observatory code and reference code for the source of the astrometry.
2003 08 23.16993 23 03 11.25 -08 25 42.6 22.5R 03QF91 807 Ci4137 2003 08 23.23867 23 03 10.97 -08 25 44.9 03QF91 807 Ci4137 2003 08 24.25771 23 03 06.51 -08 26 12.9 03QF91 807 Ci4137 2003 10 22.13867 22 59 05.26 -08 49 59.2 23.7R 03QF91 695 Cj4699 2003 10 22.21847 22 59 05.02 -08 50 00.2 03QF91 695 Cj4699 2003 10 23.11946 22 59 02.41 -08 50 13.8 23.2R 03QF91 304 Ci9429 2003 10 23.14623 22 59 02.32 -08 50 14.1 03QF91 304 Ci9429 2004 07 16.34709 23 10 26.07 -07 38 35.1 22.8R 03QF91 807 Cl8405 2004 07 16.39874 23 10 25.92 -07 38 36.3 03QF91 807 Cl8405 2004 10 12.14227 23 04 40.48 -08 14 59.2 23.2R 03QF91 695 Cl8405 2004 10 12.24748 23 04 40.09 -08 15 01.1 03QF91 695 Cl8405 2014 10 22.15971 23 54 13.11 -02 45 55.7 23.9R 03QF91 G37 C~1BxD 2014 10 22.26675 23 54 12.75 -02 45 57.8 03QF91 G37 C~1BxD 2021 09 12.328030 00 31 27.260 +01 27 46.41 23.7G 03QF91 G37 C~553k 2021 09 12.387900 00 31 27.006 +01 27 44.66 03QF91 G37 C~553k 2021 09 12.448460 00 31 26.757 +01 27 43.24 03QF91 G37 C~553k 2021 10 03.163600 00 29 56.579 +01 18 02.51 23.6G 03QF91 G37 C~553k 2021 10 03.216730 00 29 56.329 +01 18 00.99 03QF91 G37 C~553k 2021 10 03.269410 00 29 56.080 +01 17 59.60 03QF91 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 -0.05 0.00 0.20
2 0.0002 0.00 0.30 0.00 -0.20
3 0.0030 0.00 -0.12 0.00 -0.05
4 0.1642 0.00 -0.15 0.00 0.05
5 0.1644 0.00 -0.15 0.00 0.27
6 0.1669 0.00 -0.11 0.00 0.12
7 0.1669 0.00 -0.28 0.00 0.22
8 0.8985 0.00 0.22 0.00 -0.10
9 0.8986 0.00 -0.13 0.00 -0.40
10 1.1389 0.00 0.36 0.00 -0.17
11 1.1392 0.00 0.26 0.00 0.03
12 11.1649 0.00 -0.40 0.00 -0.09
13 11.1652 0.00 0.29 0.00 0.19
14 18.0566 0.00 -0.02 0.00 -0.03
15 18.0567 0.00 -0.03 0.00 -0.15
16 18.0569 0.00 0.07 0.00 0.08
17 18.1136 0.00 0.16 0.00 0.00
18 18.1137 0.00 -0.01 0.00 -0.02
19 18.1139 0.00 -0.18 0.00 0.07
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.
03QF91 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.181 43.181 43.181 ecceobj 0.037 0.037 0.037 incobj 2.180 2.180 2.180 qmin 40.816 40.816 40.816 qmax 45.377 45.378 45.375 amean 43.002 43.002 43.002 amin 42.674 42.673 42.676 amax 43.340 43.336 43.339 emean 0.030 0.030 0.030 emin 0.008 0.008 0.008 emax 0.047 0.047 0.047 imean 1.010 1.010 1.010 imin 0.239 0.239 0.239 imax 1.654 1.654 1.654 excite_mean 0.035 0.035 0.035 fracstop 1.000 1.000 1.000 cjmean 3.088 3.088 3.088 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 183.0 183.0 182.9 kozaiamp 179.9 180.0 180.0