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: 15FL399 # Created Sun Oct 19 01:10:47 2025 # Orbit generated from Bernstein formalism # Fitting 15 observations of 15 # Arc: 7.02d # 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: 3.29 DOF: 26 RMS: 0.08 # Min/Max residuals: -0.15 0.28 # Exact a, adot, b, bdot, g, gdot: 1.302101E-05 1.724202E-02 5.966104E-06 7.921892E-03 2.087741E-02 0.000000E+00 # Covariance matrix: 3.2522E-11 4.2598E-08 3.9842E-14 1.9506E-12 6.7604E-09 0.0000E+00 4.2598E-08 5.6142E-05 5.2497E-11 2.5693E-09 8.9069E-06 0.0000E+00 3.9842E-14 5.2497E-11 1.8052E-13 -1.2943E-11 8.3288E-12 0.0000E+00 1.9506E-12 2.5693E-09 -1.2943E-11 2.0304E-09 4.0765E-10 0.0000E+00 6.7604E-09 8.9069E-06 8.3288E-12 4.0765E-10 1.4131E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 1.1974E-04 # lat0 lon0 xBary yBary zBary JD0 -0.226041 -179.786542 0.049156 -0.003784 -0.990933 2457099.999865 # Heliocentric elements and errors Epoch: 2457090.5000 = 2015/03/09 Mean Anomaly: 0.99838 +/- 89.265 Argument of Peri: 358.38656 +/- 155.648 Long of Asc Node: 180.63843 +/- 0.206 Inclination: 24.62412 +/- 9.409 Eccentricity: 0.02741450 +/- 0.5621 Semi-Major Axis: 50.27066360 +/- 26.2456 Time of Perihelion: 2456729.4531 +/- 422844.4 Perihelion: 48.89251838 +/- 38.0776 Aphelion: 51.64880881 +/- 39.0569 Period (y) 356.4348 +/- 279.13 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -48.89220598 +/- 2.7273 Ecliptic Y -0.13317181 +/- 0.0099 Ecliptic Z -0.18866342 +/- 0.0107 Ecliptic XDOT 0.00000091 +/- 0.0014 Ecliptic YDOT -0.00226688 +/- 0.0009 Ecliptic ZDOT 0.00103895 +/- 0.0001 # Distances at JD0 (AU) Heliocenter to KBO 48.89275135 +/- 2.7272 Geocenter to KBO 47.89867187 +/- 2.7273 # Hcoef: 8.58
The following table shows the complete astrometric record for 15FL399. 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 (15FL399) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.499087 12 00 25.423 -00 17 32.27 25.2r 15FL399 568 C~2TuI 2015 03 18.509963 12 00 25.377 -00 17 31.89 25.0r 15FL399 568 C~2TuI 2015 03 18.536144 12 00 25.277 -00 17 31.13 25.1r 15FL399 568 C~2TuI 2015 03 18.538296 12 00 25.268 -00 17 31.07 25.3r 15FL399 568 C~2TuI 2015 03 18.566581 12 00 25.156 -00 17 30.23 25.1r 15FL399 568 C~2TuI 2015 03 20.423112 12 00 18.057 -00 16 35.02 25.1i 15FL399 568 C~2TuI 2015 03 20.463417 12 00 17.902 -00 16 33.91 25.1i 15FL399 568 C~2TuI 2015 03 20.491408 12 00 17.791 -00 16 32.93 24.9i 15FL399 568 C~2TuI 2015 03 20.538286 12 00 17.606 -00 16 31.59 25.3i 15FL399 568 C~2TuI 2015 03 20.541032 12 00 17.596 -00 16 31.46 25.0i 15FL399 568 C~2TuI 2015 03 22.49071 12 00 10.11 -00 15 33.3 25.5i 15FL399 T09 C~90HW 2015 03 22.51294 12 00 10.03 -00 15 32.8 24.7i 15FL399 T09 C~90HW 2015 03 25.45464 11 59 58.77 -00 14 05.1 26.0g 15FL399 T09 C~90HW 2015 03 25.48707 11 59 58.66 -00 14 03.9 26.5g 15FL399 T09 C~90HW 2015 03 25.51534 11 59 58.53 -00 14 03.4 26.0g 15FL399 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 0.01 0.00 0.01
2 0.0000 -0.78 -0.06 0.07 0.04
3 0.0001 -2.46 -0.03 0.17 0.03
4 0.0001 -2.61 -0.04 0.18 0.02
5 0.0002 -4.49 -0.07 0.28 0.01
6 0.0053 -124.14 0.07 8.58 -0.02
7 0.0054 -126.72 0.14 8.67 -0.09
8 0.0055 -128.64 0.06 8.91 0.04
9 0.0056 -131.72 0.05 9.03 -0.03
10 0.0056 -131.90 0.04 9.09 0.02
11 0.0109 -258.06 -0.15 17.79 -0.01
12 0.0110 -259.36 0.01 17.77 -0.12
13 0.0190 -449.21 -0.04 31.04 -0.03
14 0.0191 -451.20 0.08 31.49 0.28
15 0.0192 -453.19 -0.06 31.17 -0.15
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.
15FL399 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