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: 15FU499 # Created Tue Jun 17 01:10:29 2025 # Orbit generated from Bernstein formalism # Fitting 12 observations of 12 # Arc: 11.00d # First observation: 2015/03/18 # Last observation: 2015/03/29 Preliminary a, adot, b, bdot, g, gdot: 0.000002 0.464893 -0.000004 -0.108506 0.149934 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 11.41 DOF: 19 RMS: 0.17 # Min/Max residuals: -0.31 0.39 # Exact a, adot, b, bdot, g, gdot: 4.683829E-05 4.004663E-01 -1.169786E-05 -9.812115E-02 1.369279E-01 -2.739907E-02 # Covariance matrix: 6.9775E-13 1.8174E-09 -1.5077E-13 -2.9537E-10 3.6888E-10 1.3753E-08 1.8174E-09 1.6237E-05 -1.3143E-09 -2.5899E-06 3.2241E-06 9.9142E-05 -1.5077E-13 -1.3143E-09 5.3117E-13 1.9288E-10 -2.6116E-10 -8.1145E-09 -2.9537E-10 -2.5899E-06 1.9288E-10 4.1420E-07 -5.1451E-07 -1.5923E-05 3.6888E-10 3.2241E-06 -2.6116E-10 -5.1451E-07 6.4058E-07 1.9867E-05 1.3753E-08 9.9142E-05 -8.1145E-09 -1.5923E-05 1.9867E-05 7.0439E-04 # lat0 lon0 xBary yBary zBary JD0 13.895611 -145.530245 0.597179 0.190395 -0.769108 2457100.089728 # Heliocentric elements and errors Epoch: 2457100.5000 = 2015/03/19 Mean Anomaly: 359.45110 +/- 0.269 Argument of Peri: 151.64734 +/- 8.195 Long of Asc Node: 73.26907 +/- 0.416 Inclination: 17.97125 +/- 0.147 Eccentricity: 0.87201624 +/- 0.0137 Semi-Major Axis: 62.10740989 +/- 5.8050 Time of Perihelion: 2457373.0857 +/- 127.9 Perihelion: 7.94873999 +/- 1.1282 Aphelion: 116.26607978 +/- 10.9001 Period (y) 489.4669 +/- 68.62 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -6.83881661 +/- 0.0342 Ecliptic Y -3.96835245 +/- 0.0235 Ecliptic Z 1.75381300 +/- 0.0103 Ecliptic XDOT 0.00457846 +/- 0.0004 Ecliptic YDOT -0.00657283 +/- 0.0003 Ecliptic ZDOT -0.00203598 +/- 0.0001 # Distances at JD0 (AU) Heliocenter to KBO 8.09895634 +/- 0.0311 Geocenter to KBO 7.30311604 +/- 0.0427 # Hcoef: 16.16
The following table shows the complete astrometric record for 15FU499. 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 (15FU499) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.58895 14 27 21.91 +00 06 10.2 25.3r 15FU499 T09 C~8r6c 2015 03 18.60439 14 27 21.76 +00 06 11.1 25.2r 15FU499 T09 C~8r6c 2015 03 18.64474 14 27 21.36 +00 06 13.8 24.7r 15FU499 T09 C~8r6c 2015 03 25.56855 14 26 05.63 +00 14 07.7 25.7g 15FU499 T09 C~8r6c 2015 03 25.58363 14 26 05.46 +00 14 09.3 25.7g 15FU499 T09 C~8r6c 2015 03 25.59870 14 26 05.24 +00 14 10.3 26.0g 15FU499 T09 C~8r6c 2015 03 25.61369 14 26 05.07 +00 14 10.8 26.3g 15FU499 T09 C~8r6c 2015 03 25.62302 14 26 04.95 +00 14 11.5 25.4g 15FU499 T09 C~8r6c 2015 03 29.54187 14 25 14.82 +00 18 38.6 24.6z 15FU499 T09 C~8r6c 2015 03 29.55854 14 25 14.60 +00 18 39.6 25.2z 15FU499 T09 C~8r6c 2015 03 29.57215 14 25 14.40 +00 18 40.6 25.1z 15FU499 T09 C~8r6c 2015 03 29.58759 14 25 14.17 +00 18 41.8 25.4z 15FU499 T09 C~8r6c
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 -0.12 0.00 0.08
2 0.0000 -2.42 0.01 0.11 -0.03
3 0.0002 -8.97 0.11 0.70 -0.04
4 0.0191 -1237.52 0.00 75.88 -0.25
5 0.0192 -1240.46 0.11 76.55 0.39
6 0.0192 -1243.90 -0.31 76.42 0.21
7 0.0192 -1246.48 0.13 76.05 -0.20
8 0.0193 -1248.41 0.07 76.12 -0.16
9 0.0300 -2046.41 0.01 81.88 0.02
10 0.0300 -2049.86 0.21 81.75 -0.04
11 0.0301 -2053.02 0.03 81.71 -0.02
12 0.0301 -2056.67 -0.25 81.71 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.
15FU499 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