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: 15FF496 # Created Sun Apr 27 01:10:23 2025 # Orbit generated from Bernstein formalism # Fitting 11 observations of 11 # Arc: 7.01d # 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: 2.84 DOF: 18 RMS: 0.09 # Min/Max residuals: -0.14 0.20 # Exact a, adot, b, bdot, g, gdot: 1.528834E-05 2.319654E-02 -1.863100E-06 -2.630826E-03 2.417299E-02 0.000000E+00 # Covariance matrix: 3.2532E-11 4.8812E-08 2.0094E-13 -1.5425E-11 7.7493E-09 0.0000E+00 4.8812E-08 7.4151E-05 3.0508E-10 -2.3419E-08 1.1765E-05 0.0000E+00 2.0094E-13 3.0508E-10 3.6672E-13 -2.5856E-11 4.8408E-11 0.0000E+00 -1.5425E-11 -2.3419E-08 -2.5856E-11 2.8686E-09 -3.7160E-09 0.0000E+00 7.7493E-09 1.1765E-05 4.8408E-11 -3.7160E-09 1.8669E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 1.8587E-04 # lat0 lon0 xBary yBary zBary JD0 -1.475781 179.252392 0.032566 -0.025413 -0.991298 2457099.997678 # Heliocentric elements and errors Epoch: 2457090.5000 = 2015/03/09 Mean Anomaly: 4.67493 +/- 196.247 Argument of Peri: 187.85840 +/- 263.568 Long of Asc Node: 346.67313 +/- 4.478 Inclination: 6.61204 +/- 2.311 Eccentricity: 0.00525619 +/- 0.5666 Semi-Major Axis: 42.58600131 +/- 21.8987 Time of Perihelion: 2455772.3302 +/- 1780964.6 Perihelion: 42.36216114 +/- 32.5089 Aphelion: 42.80984149 +/- 32.6636 Period (y) 277.9128 +/- 214.36 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -42.34548418 +/- 2.3373 Ecliptic Y 0.58489491 +/- 0.0307 Ecliptic Z -1.06547914 +/- 0.0602 Ecliptic XDOT -0.00003002 +/- 0.0015 Ecliptic YDOT -0.00263290 +/- 0.0008 Ecliptic ZDOT -0.00029778 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.36292458 +/- 2.3364 Geocenter to KBO 41.36848192 +/- 2.3383 # Hcoef: 8.28
The following table shows the complete astrometric record for 15FF496. 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 (15FF496) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.49690 11 54 54.49 -01 03 23.9 24.0r 15FF496 T09 C~8nc1 2015 03 18.52754 11 54 54.34 -01 03 23.1 24.3r 15FF496 T09 C~8nc1 2015 03 20.40205 11 54 45.90 -01 02 31.3 24.0i 15FF496 T09 C~8nc1 2015 03 20.40558 11 54 45.90 -01 02 31.3 24.1i 15FF496 T09 C~8nc1 2015 03 20.52736 11 54 45.34 -01 02 27.8 24.6i 15FF496 T09 C~8nc1 2015 03 22.47957 11 54 36.55 -01 01 34.0 23.9i 15FF496 T09 C~8nc1 2015 03 22.49635 11 54 36.47 -01 01 33.3 24.0i 15FF496 T09 C~8nc1 2015 03 22.51564 11 54 36.38 -01 01 32.8 24.1i 15FF496 T09 C~8nc1 2015 03 25.43724 11 54 23.25 -01 00 11.8 25.2g 15FF496 T09 C~8nc1 2015 03 25.47420 11 54 23.08 -01 00 10.8 25.2g 15FF496 T09 C~8nc1 2015 03 25.50459 11 54 22.95 -01 00 10.1 25.2g 15FF496 T09 C~8nc1
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 -0.02 0.00 0.03
2 0.0001 -2.38 -0.14 -0.16 -0.07
3 0.0052 -139.12 -0.14 -2.99 -0.03
4 0.0052 -139.12 0.13 -2.99 -0.02
5 0.0056 -148.22 0.06 -3.12 0.09
6 0.0109 -290.57 0.20 -6.21 -0.11
7 0.0109 -291.95 0.06 -6.04 0.08
8 0.0110 -293.39 0.05 -6.12 0.04
9 0.0190 -506.28 -0.11 -10.15 0.04
10 0.0191 -509.01 -0.12 -10.25 0.01
11 0.0192 -511.08 0.05 -10.38 -0.07
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.
15FF496 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