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: 15FG564 # Created Sun Oct 19 01:10:51 2025 # Orbit generated from Bernstein formalism # Fitting 11 observations of 11 # Arc: 7.02d # First observation: 2015/03/18 # Last observation: 2015/03/25 # WARNING Fitting with energy constraint # WARNING and with gdot fixed = 0 # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # Chi-squared of fit: 5.11 DOF: 18 RMS: 0.12 # Min/Max residuals: -0.28 0.36 # Exact a, adot, b, bdot, g, gdot: 1.649675E-05 2.491092E-02 6.973834E-07 5.373673E-04 2.521146E-02 0.000000E+00 # Covariance matrix: 3.3794E-11 5.3195E-08 2.8059E-16 2.5802E-12 8.4431E-09 0.0000E+00 5.3195E-08 8.4596E-05 4.4645E-13 4.1014E-09 1.3421E-05 0.0000E+00 2.8059E-16 4.4645E-13 3.1643E-13 -2.1479E-11 7.0826E-14 0.0000E+00 2.5802E-12 4.1014E-09 -2.1479E-11 2.5227E-09 6.5071E-10 0.0000E+00 8.4431E-09 1.3421E-05 7.0826E-14 6.5071E-10 2.1293E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 2.1087E-04 # lat0 lon0 xBary yBary zBary JD0 -0.026607 179.992961 0.044695 -0.000338 -0.991157 2457100.036938 # Heliocentric elements and errors Epoch: 2457100.5000 = 2015/03/19 Mean Anomaly: 0.91882 +/- 322.085 Argument of Peri: 357.86292 +/- 28.891 Long of Asc Node: 181.13086 +/- 0.450 Inclination: 1.23529 +/- 0.468 Eccentricity: 0.01029785 +/- 0.5704 Semi-Major Axis: 41.08181365 +/- 21.3559 Time of Perihelion: 2456855.0276 +/- 855466.7 Perihelion: 40.65875913 +/- 31.5565 Aphelion: 41.50486818 +/- 31.8528 Period (y) 263.3193 +/- 205.33 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -40.65878021 +/- 2.2958 Ecliptic Y 0.04946951 +/- 0.0005 Ecliptic Z -0.01836964 +/- 0.0011 Ecliptic XDOT -0.00000378 +/- 0.0016 Ecliptic YDOT -0.00271099 +/- 0.0008 Ecliptic ZDOT 0.00005844 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 40.65881445 +/- 2.2958 Geocenter to KBO 39.66450866 +/- 2.2958 # Hcoef: 9.31
The following table shows the complete astrometric record for 15FG564. 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 (15FG564) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.53616 11 59 55.91 -00 01 17.8 25.7r 15FG564 T09 C~90HY 2015 03 18.53831 11 59 55.91 -00 01 17.8 25.3r 15FG564 T09 C~90HY 2015 03 18.56659 11 59 55.78 -00 01 16.8 24.9r 15FG564 T09 C~90HY 2015 03 20.46343 11 59 47.02 -00 00 19.3 25.0i 15FG564 T09 C~90HY 2015 03 20.50240 11 59 46.84 -00 00 18.0 24.7i 15FG564 T09 C~90HY 2015 03 22.49071 11 59 37.64 +00 00 42.4 25.1i 15FG564 T09 C~90HY 2015 03 22.51294 11 59 37.56 +00 00 43.0 24.8i 15FG564 T09 C~90HY 2015 03 22.52383 11 59 37.49 +00 00 43.4 25.0i 15FG564 T09 C~90HY 2015 03 25.45464 11 59 23.94 +00 02 12.4 26.1g 15FG564 T09 C~90HY 2015 03 25.48707 11 59 23.80 +00 02 13.4 25.8g 15FG564 T09 C~90HY 2015 03 25.55185 11 59 23.51 +00 02 15.2 25.7g 15FG564 T09 C~90HY
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 -0.18 0.00 -0.07
2 0.0000 0.00 -0.02 0.00 -0.07
3 0.0001 -2.19 -0.04 0.14 0.07
4 0.0053 -145.62 0.04 0.63 -0.05
5 0.0054 -148.61 0.04 0.75 0.08
6 0.0108 -299.25 -0.01 1.27 0.01
7 0.0109 -300.59 0.36 1.34 0.09
8 0.0109 -301.71 0.07 1.29 0.04
9 0.0189 -523.59 -0.28 2.10 -0.06
10 0.0190 -525.92 -0.12 2.18 0.03
11 0.0192 -530.62 0.13 2.10 -0.05
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.
15FG564 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