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: 15FR490 # Created Sun Feb 23 02:10:20 2025 # Orbit generated from Bernstein formalism # Fitting 17 observations of 17 # Arc: 7.07d # 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: 5.77 DOF: 30 RMS: 0.10 # Min/Max residuals: -0.23 0.30 # Exact a, adot, b, bdot, g, gdot: 1.448527E-05 2.416402E-02 -6.350182E-06 -1.055993E-02 2.601292E-02 0.000000E+00 # Covariance matrix: 4.4282E-11 7.2176E-08 6.1683E-14 4.8786E-12 1.1453E-08 0.0000E+00 7.2176E-08 1.1819E-04 1.0099E-10 7.9880E-09 1.8751E-05 0.0000E+00 6.1683E-14 1.0099E-10 1.9150E-13 -1.2578E-11 1.6022E-11 0.0000E+00 4.8786E-12 7.9880E-09 -1.2578E-11 1.5089E-09 1.2673E-09 0.0000E+00 1.1453E-08 1.8751E-05 1.6022E-11 1.2673E-09 2.9749E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 2.3163E-04 # lat0 lon0 xBary yBary zBary JD0 -0.084589 -179.900064 0.047576 -0.001335 -0.991012 2457099.977938 # Heliocentric elements and errors Epoch: 2457090.5000 = 2015/03/09 Mean Anomaly: 0.17651 +/- 327.533 Argument of Peri: 179.98114 +/- 34.031 Long of Asc Node: 359.84110 +/- 0.089 Inclination: 23.55672 +/- 9.427 Eccentricity: 0.03053069 +/- 0.5744 Semi-Major Axis: 40.67853082 +/- 21.4724 Time of Perihelion: 2457044.0357 +/- 275747.5 Perihelion: 39.43658719 +/- 31.2938 Aphelion: 41.92047446 +/- 32.1808 Period (y) 259.4514 +/- 205.43 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -39.43654934 +/- 2.5489 Ecliptic Y -0.02132665 +/- 0.0042 Ecliptic Z -0.05698259 +/- 0.0038 Ecliptic XDOT 0.00000266 +/- 0.0016 Ecliptic YDOT -0.00254902 +/- 0.0010 Ecliptic ZDOT -0.00111134 +/- 0.0001 # Distances at JD0 (AU) Heliocenter to KBO 39.43659628 +/- 2.5489 Geocenter to KBO 38.44243275 +/- 2.5489 # Hcoef: 9.49
The following table shows the complete astrometric record for 15FR490. 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 (15FR490) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.47716 12 00 13.93 -00 07 02.5 25.4r 15FR490 T09 C~8eRi 2015 03 18.53616 12 00 13.63 -00 07 01.0 25.6r 15FR490 T09 C~8eRi 2015 03 18.53831 12 00 13.62 -00 07 00.8 25.6r 15FR490 T09 C~8eRi 2015 03 18.56659 12 00 13.46 -00 07 00.1 25.1r 15FR490 T09 C~8eRi 2015 03 18.57522 12 00 13.44 -00 06 59.8 25.3r 15FR490 T09 C~8eRi 2015 03 20.46343 12 00 04.02 -00 06 10.9 24.8i 15FR490 T09 C~8eRi 2015 03 20.49142 12 00 03.88 -00 06 10.2 25.0i 15FR490 T09 C~8eRi 2015 03 20.50240 12 00 03.82 -00 06 10.1 24.8i 15FR490 T09 C~8eRi 2015 03 20.53830 12 00 03.64 -00 06 09.2 24.7i 15FR490 T09 C~8eRi 2015 03 22.47680 11 59 53.97 -00 05 18.8 24.8i 15FR490 T09 C~8eRi 2015 03 22.49071 11 59 53.90 -00 05 18.3 25.0i 15FR490 T09 C~8eRi 2015 03 22.52383 11 59 53.72 -00 05 17.5 24.9i 15FR490 T09 C~8eRi 2015 03 25.45464 11 59 39.13 -00 04 01.6 25.6g 15FR490 T09 C~8eRi 2015 03 25.48707 11 59 38.97 -00 04 00.9 26.5g 15FR490 T09 C~8eRi 2015 03 25.51323 11 59 38.83 -00 04 00.0 26.0g 15FR490 T09 C~8eRi 2015 03 25.51534 11 59 38.81 -00 04 00.0 26.2g 15FR490 T09 C~8eRi 2015 03 25.54330 11 59 38.69 -00 03 59.0 25.7g 15FR490 T09 C~8eRi
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 0.04 0.00 -0.01
2 0.0002 -4.73 0.04 -0.41 -0.05
3 0.0002 -4.94 -0.01 -0.29 0.09
4 0.0002 -7.42 -0.23 -0.60 -0.04
5 0.0003 -7.82 0.07 -0.45 0.17
6 0.0054 -156.91 -0.01 -11.79 0.06
7 0.0055 -159.11 0.03 -11.98 0.05
8 0.0055 -159.98 0.04 -12.25 -0.14
9 0.0056 -162.81 0.08 -12.50 -0.16
10 0.0110 -315.94 0.07 -23.95 -0.07
11 0.0110 -317.11 0.02 -23.91 0.06
12 0.0111 -319.90 -0.12 -24.25 -0.06
13 0.0191 -550.88 0.03 -41.67 -0.03
14 0.0192 -553.36 0.14 -41.98 -0.13
15 0.0193 -555.65 -0.05 -41.99 0.03
16 0.0193 -555.92 -0.16 -42.11 -0.08
17 0.0193 -557.97 0.02 -41.91 0.30
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.
15FR490 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