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: 15FW562 # Created Thu Jul 3 01:10:30 2025 # Orbit generated from Bernstein formalism # Fitting 9 observations of 9 # Arc: 7.08d # First observation: 2015/03/18 # Last observation: 2015/03/25 # WARNING Fitting with energy constraint # WARNING and with gdot fixed = 0 # Chi-squared of fit: 6.21 DOF: 14 RMS: 0.15 # Min/Max residuals: -0.25 0.28 # Exact a, adot, b, bdot, g, gdot: 1.369877E-05 2.111040E-02 2.589612E-07 8.428405E-06 2.243057E-02 0.000000E+00 # Covariance matrix: 2.7739E-11 3.8786E-08 6.8222E-14 -1.2489E-12 6.1563E-09 0.0000E+00 3.8786E-08 5.4825E-05 9.6390E-11 -1.7646E-09 8.6982E-06 0.0000E+00 6.8222E-14 9.6390E-11 2.7611E-13 -1.6068E-11 1.5293E-11 0.0000E+00 -1.2489E-12 -1.7646E-09 -1.6068E-11 2.2897E-09 -2.7997E-10 0.0000E+00 6.1563E-09 8.6982E-06 1.5293E-11 -2.7997E-10 1.3801E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 1.4851E-04 # lat0 lon0 xBary yBary zBary JD0 -0.917811 179.629975 0.039703 -0.015750 -0.991231 2457099.963238 # Heliocentric elements and errors Epoch: 2457090.5000 = 2015/03/09 Mean Anomaly: 0.87492 +/- 99.091 Argument of Peri: 270.65211 +/- 166.285 Long of Asc Node: 267.97306 +/- 8.319 Inclination: 0.89811 +/- 0.004 Eccentricity: 0.02721516 +/- 0.5590 Semi-Major Axis: 46.85128387 +/- 24.5220 Time of Perihelion: 2456805.8267 +/- 383641.4 Perihelion: 45.57621850 +/- 35.4259 Aphelion: 48.12634924 +/- 36.3380 Period (y) 320.6937 +/- 251.78 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -45.56956904 +/- 2.3346 Ecliptic Y 0.33380633 +/- 0.0153 Ecliptic Z -0.71409463 +/- 0.0374 Ecliptic XDOT -0.00002007 +/- 0.0015 Ecliptic YDOT -0.00258243 +/- 0.0008 Ecliptic ZDOT 0.00000112 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 45.57638621 +/- 2.3342 Geocenter to KBO 44.58201138 +/- 2.3349 # Hcoef: 8.97
The following table shows the complete astrometric record for 15FW562. 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 (15FW562) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.46246 11 57 10.90 -00 41 41.6 25.2r 15FW562 T09 C~8vFZ 2015 03 18.49910 11 57 10.71 -00 41 40.6 25.3r 15FW562 T09 C~8vFZ 2015 03 18.53831 11 57 10.58 -00 41 39.2 25.0r 15FW562 T09 C~8vFZ 2015 03 18.56877 11 57 10.43 -00 41 38.5 25.1r 15FW562 T09 C~8vFZ 2015 03 20.44977 11 57 02.62 -00 40 47.8 25.2i 15FW562 T09 C~8vFZ 2015 03 20.48863 11 57 02.46 -00 40 46.8 25.2i 15FW562 T09 C~8vFZ 2015 03 25.47635 11 56 41.74 -00 38 32.1 26.5g 15FW562 T09 C~8vFZ 2015 03 25.51534 11 56 41.59 -00 38 30.7 26.3g 15FW562 T09 C~8vFZ 2015 03 25.54542 11 56 41.45 -00 38 30.0 25.9g 15FW562 T09 C~8vFZ
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 0.24 0.00 -0.05
2 0.0001 -3.01 -0.24 -0.22 -0.25
3 0.0002 -5.36 0.11 0.29 0.28
4 0.0003 -7.70 -0.13 0.04 0.04
5 0.0054 -135.34 -0.03 -0.04 0.00
6 0.0055 -137.94 0.05 -0.08 -0.02
7 0.0192 -476.66 0.01 -0.13 -0.21
8 0.0193 -479.28 0.07 0.26 0.20
9 0.0194 -481.49 -0.08 0.07 0.01
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.