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: 15TQ454 # Created Sun Nov 24 02:10:28 2024 # Orbit generated from Bernstein formalism # Fitting 7 observations of 7 # Arc: 2.18y # First observation: 2015/10/07 # Last observation: 2017/12/11 Preliminary a, adot, b, bdot, g, gdot: 0.000087 0.027404 0.000019 0.010790 0.026512 0.000000 # Chi-squared of fit: 2.72 DOF: 8 RMS: 0.11 # Min/Max residuals: -0.17 0.22 # Exact a, adot, b, bdot, g, gdot: 1.687024E-05 2.743646E-02 6.400965E-06 1.084616E-02 2.636872E-02 -3.367273E-03 # Covariance matrix: 5.4340E-13 -6.8852E-13 7.4512E-14 -3.9455E-13 2.9064E-13 -1.3000E-11 -6.8852E-13 4.4978E-12 -6.4267E-13 3.1033E-12 2.5941E-13 1.0826E-10 7.4512E-14 -6.4267E-13 5.4494E-13 -7.4082E-13 1.1736E-14 -1.6794E-11 -3.9455E-13 3.1033E-12 -7.4082E-13 2.6694E-12 -2.6319E-13 8.2334E-11 2.9064E-13 2.5941E-13 1.1736E-14 -2.6319E-13 1.9017E-12 -4.6397E-12 -1.3000E-11 1.0826E-10 -1.6794E-11 8.2334E-11 -4.6397E-12 2.8450E-09 # lat0 lon0 xBary yBary zBary JD0 -24.972168 13.058606 -0.005827 -0.423415 -0.909625 2457302.703629 # Heliocentric elements and errors Epoch: 2457300.5000 = 2015/10/05 Mean Anomaly: 342.33232 +/- 0.227 Argument of Peri: 340.11612 +/- 0.432 Long of Asc Node: 59.14387 +/- 0.002 Inclination: 32.14231 +/- 0.001 Eccentricity: 0.26539419 +/- 0.0010 Semi-Major Axis: 51.28596307 +/- 0.0246 Time of Perihelion: 2463884.2492 +/- 84.4 Perihelion: 37.67496642 +/- 0.0534 Aphelion: 64.89695973 +/- 0.0591 Period (y) 367.2874 +/- 0.26 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 34.46171187 +/- 0.0018 Ecliptic Y 7.99990558 +/- 0.0004 Ecliptic Z -16.01037421 +/- 0.0008 Ecliptic XDOT -0.00049093 +/- 0.0000 Ecliptic YDOT 0.00280433 +/- 0.0000 Ecliptic ZDOT 0.00116852 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 38.83220514 +/- 0.0016 Geocenter to KBO 37.92372171 +/- 0.0020 # Hcoef: 7.99
The following table shows the complete astrometric record for 15TQ454. 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 (15TQ454) followed by the observatory code and reference code for the source of the astrometry.
2015 10 07.20284 01 27 47.573 -17 48 37.03 23.3i 15TQ454 W84 C~55X8 2015 11 06.11474 01 25 12.176 -17 55 46.29 23.1i 15TQ454 W84 C~55X8 2015 11 07.13886 01 25 07.197 -17 55 47.85 24.0i 15TQ454 W84 C~55X8 2016 09 30.29285 01 33 15.377 -16 32 58.38 23.2i 15TQ454 W84 C~55X8 2016 10 02.21950 01 33 05.716 -16 33 54.07 24.2r 15TQ454 W84 C~55X8 2017 11 24.15304 01 33 37.938 -15 29 08.78 24.2r 15TQ454 W84 C~55X8 2017 12 11.06035 01 32 39.890 -15 23 48.38 24.1r 15TQ454 W84 C~55X8
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 -0.09 0.00 0.02
2 0.0819 -2202.12 -0.17 507.03 0.05
3 0.0847 -2267.77 0.22 534.30 -0.03
4 0.9831 6148.07 -0.14 2212.68 0.06
5 0.9884 5998.43 0.20 2219.36 -0.13
6 2.1326 8031.61 -0.02 5568.85 0.06
7 2.1789 7398.84 -0.01 6207.97 -0.02
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.
15TQ454 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 51.953 52.000 51.908 ecceobj 0.274 0.275 0.273 incobj 32.103 32.103 32.102 qmin 36.063 35.013 36.194 qmax 67.772 69.326 67.449 amean 51.547 51.740 51.504 amin 51.052 51.092 51.019 amax 52.157 52.455 52.089 emean 0.278 0.295 0.276 emin 0.258 0.260 0.257 emax 0.299 0.323 0.295 imean 30.750 30.290 30.780 imin 30.273 29.594 30.334 imax 31.302 31.265 31.329 excite_mean 0.582 0.584 0.581 fracstop 1.000 1.000 1.000 cjmean 2.744 2.744 2.744 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 157.1 176.7 156.3 kozaiamp 180.0 179.9 180.0