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: 15FC400 # Created Wed Sep 3 01:10:36 2025 # Orbit generated from Bernstein formalism # Fitting 18 observations of 18 # Arc: 7.07d # 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: 5.75 DOF: 32 RMS: 0.10 # Min/Max residuals: -0.27 0.18 # Exact a, adot, b, bdot, g, gdot: 1.538532E-05 2.381891E-02 7.442675E-07 8.691963E-04 2.443975E-02 0.000000E+00 # Covariance matrix: 3.1947E-11 4.8920E-08 5.2602E-14 3.6933E-12 7.7623E-09 0.0000E+00 4.8920E-08 7.5308E-05 8.0958E-11 5.6843E-09 1.1947E-05 0.0000E+00 5.2602E-14 8.0958E-11 1.5533E-13 -1.0434E-11 1.2843E-11 0.0000E+00 3.6933E-12 5.6843E-09 -1.0434E-11 1.4808E-09 9.0176E-10 0.0000E+00 7.7623E-09 1.1947E-05 1.2843E-11 9.0176E-10 1.8953E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 1.9209E-04 # lat0 lon0 xBary yBary zBary JD0 -0.255620 179.970191 0.045332 -0.004294 -0.991108 2457099.977925 # Heliocentric elements and errors Epoch: 2457090.5000 = 2015/03/09 Mean Anomaly: 0.78028 +/- 159.833 Argument of Peri: 352.34506 +/- 226.537 Long of Asc Node: 186.72149 +/- 2.455 Inclination: 2.10219 +/- 0.757 Eccentricity: 0.01412655 +/- 0.5666 Semi-Major Axis: 42.51168368 +/- 22.0951 Time of Perihelion: 2456871.0632 +/- 652401.6 Perihelion: 41.91114025 +/- 32.4770 Aphelion: 43.11222711 +/- 32.8990 Period (y) 277.1856 +/- 216.10 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -41.91075180 +/- 2.3048 Ecliptic Y 0.06693960 +/- 0.0014 Ecliptic Z -0.18249993 +/- 0.0103 Ecliptic XDOT -0.00000524 +/- 0.0016 Ecliptic YDOT -0.00267407 +/- 0.0008 Ecliptic ZDOT 0.00009746 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.91120260 +/- 2.3048 Geocenter to KBO 40.91694581 +/- 2.3048 # Hcoef: 8.89
The following table shows the complete astrometric record for 15FC400. 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 (15FC400) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.477147 11 59 29.033 -00 13 21.61 24.8r 15FC400 568 C~2TuJ 2015 03 18.499087 11 59 28.935 -00 13 20.91 24.8r 15FC400 568 C~2TuJ 2015 03 18.509963 11 59 28.884 -00 13 20.58 24.9r 15FC400 568 C~2TuJ 2015 03 18.536144 11 59 28.769 -00 13 19.85 24.8r 15FC400 568 C~2TuJ 2015 03 18.538296 11 59 28.759 -00 13 19.81 24.8r 15FC400 568 C~2TuJ 2015 03 18.566581 11 59 28.628 -00 13 18.91 25.0r 15FC400 568 C~2TuJ 2015 03 18.575207 11 59 28.589 -00 13 18.65 24.8r 15FC400 568 C~2TuJ 2015 03 20.42312 11 59 20.29 -00 12 23.6 24.5i 15FC400 T09 C~90HW 2015 03 20.50240 11 59 19.93 -00 12 21.5 24.5i 15FC400 T09 C~90HW 2015 03 20.54104 11 59 19.75 -00 12 20.3 24.9i 15FC400 T09 C~90HW 2015 03 22.476789 11 59 11.088 -00 11 22.77 24.4i 15FC400 568 C~2TuJ 2015 03 22.490702 11 59 11.021 -00 11 22.39 24.4i 15FC400 568 C~2TuJ 2015 03 22.512930 11 59 10.927 -00 11 21.69 24.6i 15FC400 568 C~2TuJ 2015 03 22.523816 11 59 10.876 -00 11 21.29 24.5i 15FC400 568 C~2TuJ 2015 03 25.45464 11 58 57.73 -00 09 54.3 25.6g 15FC400 T09 C~90HW 2015 03 25.48707 11 58 57.59 -00 09 53.3 26.1g 15FC400 T09 C~90HW 2015 03 25.54330 11 58 57.32 -00 09 51.8 26.1g 15FC400 T09 C~90HW 2015 03 25.55185 11 58 57.30 -00 09 51.5 26.3g 15FC400 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 -0.04
2 0.0001 -1.63 0.02 0.06 0.02
3 0.0001 -2.46 -0.01 0.06 0.02
4 0.0002 -4.33 0.07 0.04 0.00
5 0.0002 -4.49 0.08 0.02 -0.02
6 0.0002 -6.65 0.02 0.06 0.02
7 0.0003 -7.29 0.03 0.07 0.03
8 0.0053 -143.40 -0.27 1.06 0.08
9 0.0055 -149.19 -0.14 0.84 -0.14
10 0.0057 -152.14 -0.21 0.86 -0.11
11 0.0110 -294.23 0.13 1.96 0.03
12 0.0110 -295.31 0.10 1.91 -0.02
13 0.0110 -296.88 0.18 1.99 0.06
14 0.0111 -297.74 0.13 2.05 0.12
15 0.0191 -513.26 -0.09 3.43 0.00
16 0.0192 -515.59 -0.00 3.51 0.09
17 0.0193 -519.90 -0.14 3.27 -0.15
18 0.0194 -520.29 0.10 3.43 0.00
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.
15FC400 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