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: 15FS493 # Created Sun Feb 23 02:10:20 2025 # Orbit generated from Bernstein formalism # Fitting 8 observations of 8 # Arc: 7.01d # 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: 2.16 DOF: 12 RMS: 0.09 # Min/Max residuals: -0.13 0.19 # Exact a, adot, b, bdot, g, gdot: 1.532265E-05 2.231597E-02 -7.916448E-07 1.709674E-04 2.325923E-02 0.000000E+00 # Covariance matrix: 2.9107E-11 4.2127E-08 7.1863E-14 -1.8881E-11 6.6898E-09 0.0000E+00 4.2127E-08 6.1684E-05 1.0517E-10 -2.7632E-08 9.7901E-06 0.0000E+00 7.1863E-14 1.0517E-10 3.0698E-13 -2.0214E-11 1.6693E-11 0.0000E+00 -1.8881E-11 -2.7632E-08 -2.0214E-11 3.3144E-09 -4.3858E-09 0.0000E+00 6.6898E-09 9.7901E-06 1.6693E-11 -4.3858E-09 1.5539E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 1.6558E-04 # lat0 lon0 xBary yBary zBary JD0 -1.175624 178.694183 0.022142 -0.020229 -0.991711 2457100.041298 # Heliocentric elements and errors Epoch: 2457100.5000 = 2015/03/19 Mean Anomaly: 1.37893 +/- 331.399 Argument of Peri: 289.51914 +/- 38.355 Long of Asc Node: 247.67771 +/- 9.581 Inclination: 1.23067 +/- 0.080 Eccentricity: 0.03038296 +/- 0.5595 Semi-Major Axis: 45.36647666 +/- 23.7985 Time of Perihelion: 2456672.9941 +/- 325961.1 Perihelion: 43.98810896 +/- 34.3030 Aphelion: 46.74484436 +/- 35.2920 Period (y) 305.5700 +/- 240.45 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -43.96776230 +/- 2.3031 Ecliptic Y 1.02408542 +/- 0.0527 Ecliptic Z -0.88211649 +/- 0.0473 Ecliptic XDOT -0.00006369 +/- 0.0015 Ecliptic YDOT -0.00263190 +/- 0.0008 Ecliptic ZDOT 0.00002021 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.98853262 +/- 2.3020 Geocenter to KBO 42.99368105 +/- 2.3042 # Hcoef: 8.96
The following table shows the complete astrometric record for 15FS493. 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 (15FS493) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.54052 11 53 20.25 -00 33 33.4 25.4r 15FS493 T09 C~8eRn 2015 03 18.56877 11 53 20.12 -00 33 32.8 24.9r 15FS493 T09 C~8eRn 2015 03 18.57089 11 53 20.12 -00 33 32.9 25.5r 15FS493 T09 C~8eRn 2015 03 20.42657 11 53 12.15 -00 32 40.7 25.1i 15FS493 T09 C~8eRn 2015 03 20.48579 11 53 11.89 -00 32 39.2 25.1i 15FS493 T09 C~8eRn 2015 03 20.54374 11 53 11.63 -00 32 37.5 24.5i 15FS493 T09 C~8eRn 2015 03 25.47420 11 52 50.51 -00 30 19.4 26.1g 15FS493 T09 C~8eRn 2015 03 25.54754 11 52 50.20 -00 30 17.1 25.7g 15FS493 T09 C~8eRn
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 -0.03 0.00 0.19
2 0.0001 -2.03 -0.05 -0.22 -0.03
3 0.0001 -1.99 0.14 -0.32 -0.12
4 0.0052 -132.43 -0.02 0.04 0.07
5 0.0053 -136.61 0.03 -0.14 -0.08
6 0.0055 -140.86 -0.09 -0.13 -0.05
7 0.0190 -486.44 0.01 0.59 -0.13
8 0.0192 -491.62 0.02 0.85 0.14
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.
15FS493 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0