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: 15FP399 # Created Wed Sep 3 01:10:36 2025 # Orbit generated from Bernstein formalism # Fitting 11 observations of 11 # Arc: 7.08d # 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: 1.06 DOF: 18 RMS: 0.05 # Min/Max residuals: -0.10 0.17 # Exact a, adot, b, bdot, g, gdot: 1.523569E-05 2.141270E-02 4.976883E-07 9.912150E-04 2.265995E-02 0.000000E+00 # Covariance matrix: 2.8173E-11 3.9820E-08 1.0716E-13 -3.7445E-12 6.3207E-09 0.0000E+00 3.9820E-08 5.6798E-05 1.5278E-10 -5.3390E-09 9.0118E-06 0.0000E+00 1.0716E-13 1.5278E-10 2.3400E-13 -1.5134E-11 2.4242E-11 0.0000E+00 -3.7445E-12 -5.3390E-09 -1.5134E-11 2.2857E-09 -8.4713E-10 0.0000E+00 6.3207E-09 9.0118E-06 2.4242E-11 -8.4713E-10 1.4299E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 1.5311E-04 # lat0 lon0 xBary yBary zBary JD0 -1.045399 179.610637 0.039368 -0.017958 -0.991206 2457099.963227 # Heliocentric elements and errors Epoch: 2457090.5000 = 2015/03/09 Mean Anomaly: 0.88984 +/- 87.430 Argument of Peri: 337.90112 +/- 153.887 Long of Asc Node: 200.66457 +/- 6.815 Inclination: 2.83730 +/- 0.877 Eccentricity: 0.02747886 +/- 0.5589 Semi-Major Axis: 46.39992767 +/- 24.2704 Time of Perihelion: 2456805.1466 +/- 374371.6 Perihelion: 45.12491055 +/- 35.0665 Aphelion: 47.67494478 +/- 35.9779 Period (y) 316.0706 +/- 247.99 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -45.11657667 +/- 2.3284 Ecliptic Y 0.34571173 +/- 0.0160 Ecliptic Z -0.80511272 +/- 0.0425 Ecliptic XDOT -0.00002318 +/- 0.0015 Ecliptic YDOT -0.00259285 +/- 0.0008 Ecliptic ZDOT 0.00011983 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 45.12508408 +/- 2.3279 Geocenter to KBO 44.13073306 +/- 2.3288 # Hcoef: 7.97
The following table shows the complete astrometric record for 15FP399. 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 (15FP399) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.462449 11 56 54.460 -00 48 15.32 24.1r 15FP399 568 C~2TuI 2015 03 18.499087 11 56 54.305 -00 48 14.35 24.2r 15FP399 568 C~2TuI 2015 03 18.538296 11 56 54.138 -00 48 13.27 24.1r 15FP399 568 C~2TuI 2015 03 18.568755 11 56 54.011 -00 48 12.40 24.0r 15FP399 568 C~2TuI 2015 03 20.405567 11 56 46.341 -00 47 21.48 23.8i 15FP399 568 C~2TuI 2015 03 20.488617 11 56 45.983 -00 47 19.18 23.8i 15FP399 568 C~2TuI 2015 03 20.527344 11 56 45.820 -00 47 18.11 23.8i 15FP399 568 C~2TuI 2015 03 20.541032 11 56 45.760 -00 47 17.76 23.8i 15FP399 568 C~2TuI 2015 03 25.44011 11 56 25.30 -00 45 01.5 25.8g 15FP399 T09 C~90HW 2015 03 25.45755 11 56 25.23 -00 45 00.8 25.6g 15FP399 T09 C~90HW 2015 03 25.54542 11 56 24.85 -00 44 58.6 25.6g 15FP399 T09 C~90HW
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 -0.06 0.00 0.04
2 0.0001 -2.52 -0.03 -0.03 0.00
3 0.0002 -5.25 -0.03 -0.04 -0.00
4 0.0003 -7.34 -0.01 0.00 0.03
5 0.0053 -133.14 0.07 0.95 0.00
6 0.0055 -138.98 0.02 0.93 -0.03
7 0.0057 -141.65 0.05 0.94 -0.02
8 0.0057 -142.62 0.04 0.90 -0.06
9 0.0191 -478.37 0.01 3.83 -0.05
10 0.0192 -479.61 -0.02 4.06 0.17
11 0.0194 -485.71 -0.04 3.81 -0.10
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.
15FP399 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