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: 15QW33 # Created Sat Apr 20 01:17:26 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 12 observations of 12 # Arc: 6.96y # First observation: 2014/12/15 # Last observation: 2021/12/01 # Chi-squared of fit: 5.25 DOF: 18 RMS: 0.12 # Min/Max residuals: -0.20 0.19 # Exact a, adot, b, bdot, g, gdot: 1.328742E-05 1.604373E-02 3.158078E-06 3.024904E-03 1.983093E-02 -2.579842E-03 # Covariance matrix: 9.2651E-13 -4.9986E-13 2.3724E-14 -7.0598E-14 -4.6745E-13 -3.2345E-12 -4.9986E-13 4.9485E-13 -8.5078E-14 8.3970E-14 6.2914E-14 3.6891E-12 2.3724E-14 -8.5078E-14 2.9724E-13 -6.9345E-14 8.5292E-14 -7.1280E-13 -7.0598E-14 8.3970E-14 -6.9345E-14 3.3371E-14 -3.0830E-15 6.5797E-13 -4.6745E-13 6.2914E-14 8.5292E-14 -3.0830E-15 7.1022E-13 9.2883E-14 -3.2345E-12 3.6891E-12 -7.1280E-13 6.5797E-13 9.2883E-14 2.8779E-11 # lat0 lon0 xBary yBary zBary JD0 -18.767391 17.733615 -0.891283 -0.133770 -0.394303 2457006.649748 # Heliocentric elements and errors Epoch: 2457006.5000 = 2014/12/15 Mean Anomaly: 240.43612 +/- 0.068 Argument of Peri: 74.76658 +/- 0.058 Long of Asc Node: 77.48536 +/- 0.001 Inclination: 21.51578 +/- 0.000 Eccentricity: 0.17691498 +/- 0.0003 Semi-Major Axis: 45.87497741 +/- 0.0065 Time of Perihelion: 2494699.4143 +/- 26.9 Perihelion: 37.75900675 +/- 0.0127 Aphelion: 53.99094807 +/- 0.0138 Period (y) 310.7220 +/- 0.07 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 45.59870570 +/- 0.0019 Ecliptic Y 15.52016542 +/- 0.0006 Ecliptic Z -16.22340004 +/- 0.0007 Ecliptic XDOT -0.00087199 +/- 0.0000 Ecliptic YDOT 0.00204281 +/- 0.0000 Ecliptic ZDOT 0.00051010 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 50.82642711 +/- 0.0018 Geocenter to KBO 50.42641748 +/- 0.0021 # Hcoef: 6.73
The following table shows the complete astrometric record for 15QW33. 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 (15QW33) followed by the observatory code and reference code for the source of the astrometry.
2014 12 15.14897 01 34 05.682 -10 23 47.74 24.7r 15QW33 W84 C~55Wc 2015 08 23.38262 01 43 28.126 -09 23 54.30 23.8i 15QW33 W84 C~55Wc 2015 11 06.20466 01 39 14.319 -09 53 19.91 23.4i 15QW33 W84 C~55Wc 2015 11 15.13264 01 38 41.498 -09 54 33.32 23.1i 15QW33 W84 C~55Wc 2015 11 15.13401 01 38 41.500 -09 54 33.28 23.8r 15QW33 W84 C~55Wc 2016 10 03.27622 01 44 37.190 -09 11 30.18 23.9r 15QW33 W84 C~55Wc 2016 11 04.16401 01 42 31.661 -09 21 34.81 22.1r 15QW33 W84 C~55Wc 2017 11 18.11962 01 44 53.609 -08 51 43.74 23.7r 15QW33 W84 C~55Wd 2017 11 24.16130 01 44 33.278 -08 52 01.38 24.0i 15QW33 W84 C~55Wd 2021 12 01.113700 01 57 05.312 -06 42 37.61 23.9G 15QW33 G37 C~5J7b 2021 12 01.165340 01 57 05.126 -06 42 37.94 15QW33 G37 C~5J7b 2021 12 01.217150 01 57 04.982 -06 42 37.80 15QW33 G37 C~5J7b
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 -0.04 0.00 -0.18
2 0.6878 0.00 0.06 0.00 -0.10
3 0.8927 0.00 -0.05 0.00 -0.03
4 0.9171 0.00 0.09 0.00 0.06
5 0.9171 0.00 0.19 0.00 0.11
6 1.8019 0.00 -0.02 0.00 0.09
7 1.8892 0.00 -0.11 0.00 0.14
8 2.9267 0.00 -0.05 0.00 0.06
9 2.9432 0.00 -0.08 0.00 -0.05
10 6.9623 0.00 0.16 0.00 0.19
11 6.9624 0.00 -0.20 0.00 -0.18
12 6.9625 0.00 0.09 0.00 -0.09
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.
15QW33 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 46.240 46.240 46.240 ecceobj 0.169 0.169 0.169 incobj 21.507 21.507 21.507 qmin 37.386 37.430 37.426 qmax 54.995 54.977 54.978 amean 46.008 46.006 46.008 amin 45.604 45.601 45.608 amax 46.457 46.490 46.464 emean 0.170 0.170 0.169 emin 0.156 0.156 0.155 emax 0.184 0.184 0.184 imean 20.193 20.194 20.202 imin 19.815 19.829 19.852 imax 20.619 20.627 20.640 excite_mean 0.385 0.385 0.385 fracstop 1.000 1.000 1.000 cjmean 2.941 2.941 2.941 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 175.7 175.4 175.5 kozaiamp 180.0 180.0 180.0