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: 15FQ401 # Created Mon Jul 7 01:10:30 2025 # Orbit generated from Bernstein formalism # Fitting 15 observations of 15 # 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: 4.33 DOF: 26 RMS: 0.09 # Min/Max residuals: -0.19 0.20 # Exact a, adot, b, bdot, g, gdot: 1.282941E-05 1.469181E-02 4.729076E-06 5.585344E-03 1.847581E-02 0.000000E+00 # Covariance matrix: 2.5623E-11 2.9683E-08 9.7436E-14 1.3121E-11 4.7122E-09 0.0000E+00 2.9683E-08 3.4673E-05 1.1376E-10 1.5318E-08 5.5015E-06 0.0000E+00 9.7436E-14 1.1376E-10 1.8802E-13 -1.3269E-11 1.8052E-11 0.0000E+00 1.3121E-11 1.5318E-08 -1.3269E-11 1.9840E-09 2.4306E-09 0.0000E+00 4.7122E-09 5.5015E-06 1.8052E-11 2.4306E-09 8.7297E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 8.2991E-05 # lat0 lon0 xBary yBary zBary JD0 -1.024426 -178.876855 0.065470 -0.017571 -0.989833 2457099.966198 # Heliocentric elements and errors Epoch: 2457090.5000 = 2015/03/09 Mean Anomaly: 1.91473 +/- 353.700 Argument of Peri: 355.16893 +/- 60.190 Long of Asc Node: 183.70525 +/- 1.052 Inclination: 20.79093 +/- 7.580 Eccentricity: 0.01514703 +/- 0.5569 Semi-Major Axis: 55.96502343 +/- 28.8630 Time of Perihelion: 2456277.1473 +/- 914863.0 Perihelion: 55.11731955 +/- 42.1829 Aphelion: 56.81272732 +/- 42.7770 Period (y) 418.6810 +/- 323.89 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -55.09998141 +/- 2.7361 Ecliptic Y -1.01495642 +/- 0.0534 Ecliptic Z -0.96740769 +/- 0.0489 Ecliptic XDOT 0.00002446 +/- 0.0013 Ecliptic YDOT -0.00218276 +/- 0.0008 Ecliptic ZDOT 0.00082762 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 55.11781895 +/- 2.7353 Geocenter to KBO 54.12483252 +/- 2.7371 # Hcoef: 7.90
The following table shows the complete astrometric record for 15FQ401. 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 (15FQ401) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.46542 12 02 29.51 -01 23 11.9 25.5r 15FQ401 T09 C~8vFU 2015 03 18.50126 12 02 29.39 -01 23 11.1 25.5r 15FQ401 T09 C~8vFU 2015 03 18.52967 12 02 29.30 -01 23 10.4 25.4r 15FQ401 T09 C~8vFU 2015 03 18.53187 12 02 29.28 -01 23 10.2 26.2r 15FQ401 T09 C~8vFU 2015 03 18.55800 12 02 29.20 -01 23 09.5 25.8r 15FQ401 T09 C~8vFU 2015 03 20.40902 12 02 22.84 -01 22 21.8 24.6i 15FQ401 T09 C~8vFU 2015 03 20.49142 12 02 22.55 -01 22 20.0 25.0i 15FQ401 T09 C~8vFU 2015 03 20.53005 12 02 22.41 -01 22 19.0 24.8i 15FQ401 T09 C~8vFU 2015 03 20.53283 12 02 22.41 -01 22 18.8 24.5i 15FQ401 T09 C~8vFU 2015 03 22.465568 12 02 15.785 -01 21 29.15 24.5i 15FQ401 568 C~2TuK 2015 03 22.473979 12 02 15.755 -01 21 29.01 24.4i 15FQ401 568 C~2TuK 2015 03 22.501868 12 02 15.651 -01 21 28.25 24.3i 15FQ401 568 C~2TuK 2015 03 25.506759 12 02 05.340 -01 20 10.72 25.9g 15FQ401 568 C~2TuK 2015 03 25.534739 12 02 05.249 -01 20 10.12 25.6g 15FQ401 568 C~2TuK 2015 03 25.543291 12 02 05.212 -01 20 09.83 25.6g 15FQ401 568 C~2TuK
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 -0.05 0.00 0.01
2 0.0001 -1.97 0.06 0.02 -0.07
3 0.0002 -3.49 0.20 0.12 -0.04
4 0.0002 -3.84 -0.03 0.19 0.02
5 0.0003 -5.22 0.11 0.35 0.11
6 0.0053 -111.70 -0.19 6.17 0.19
7 0.0055 -116.40 -0.09 6.10 -0.11
8 0.0057 -118.73 -0.17 6.18 -0.13
9 0.0057 -118.81 -0.08 6.36 0.04
10 0.0110 -229.70 0.09 12.39 0.03
11 0.0110 -230.17 0.11 12.34 -0.05
12 0.0111 -231.91 0.01 12.42 -0.05
13 0.0193 -404.61 -0.04 22.03 0.06
14 0.0194 -406.10 0.10 22.04 -0.02
15 0.0194 -406.73 -0.03 22.08 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.
15FQ401 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