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: 15FE401 # Created Sun Oct 19 01:10:47 2025 # Orbit generated from Bernstein formalism # Fitting 11 observations of 11 # Arc: 7.04d # 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: 3.40 DOF: 18 RMS: 0.10 # Min/Max residuals: -0.27 0.11 # Exact a, adot, b, bdot, g, gdot: 1.505295E-05 2.231226E-02 -4.197538E-07 -1.003367E-03 2.336197E-02 0.000000E+00 # Covariance matrix: 2.9904E-11 4.3362E-08 2.6601E-14 1.0790E-13 6.8896E-09 0.0000E+00 4.3362E-08 6.3417E-05 3.8889E-11 1.5782E-10 1.0072E-05 0.0000E+00 2.6601E-14 3.8889E-11 2.3326E-13 -1.5096E-11 6.1768E-12 0.0000E+00 1.0790E-13 1.5782E-10 -1.5096E-11 2.2864E-09 2.5066E-11 0.0000E+00 6.8896E-09 1.0072E-05 6.1768E-12 2.5066E-11 1.5998E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 1.6778E-04 # lat0 lon0 xBary yBary zBary JD0 -0.069728 177.566181 0.003565 -0.001080 -0.992149 2457099.986728 # Heliocentric elements and errors Epoch: 2457090.5000 = 2015/03/09 Mean Anomaly: 3.37749 +/- 298.869 Argument of Peri: 177.98184 +/- 5.545 Long of Asc Node: 356.04234 +/- 0.544 Inclination: 2.56791 +/- 0.921 Eccentricity: 0.01870134 +/- 0.5602 Semi-Major Axis: 44.63307117 +/- 23.1132 Time of Perihelion: 2456068.6781 +/- 526074.6 Perihelion: 43.79837293 +/- 33.7592 Aphelion: 45.46776941 +/- 34.3460 Period (y) 298.1902 +/- 231.63 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -43.76022848 +/- 2.3154 Ecliptic Y 1.86319752 +/- 0.0986 Ecliptic Z -0.05209353 +/- 0.0028 Ecliptic XDOT -0.00011431 +/- 0.0015 Ecliptic YDOT -0.00261825 +/- 0.0008 Ecliptic ZDOT -0.00011750 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.79990657 +/- 2.3133 Geocenter to KBO 42.80461791 +/- 2.3175 # Hcoef: 8.73
The following table shows the complete astrometric record for 15FE401. 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 (15FE401) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.48595 11 50 57.38 +00 54 14.0 25.4r 15FE401 T09 C~90HW 2015 03 18.51429 11 50 57.26 +00 54 14.7 25.6r 15FE401 T09 C~90HW 2015 03 18.54487 11 50 57.11 +00 54 15.7 25.6r 15FE401 T09 C~90HW 2015 03 18.57308 11 50 56.99 +00 54 16.4 25.2r 15FE401 T09 C~90HW 2015 03 20.433651 11 50 48.939 +00 55 07.80 24.2i 15FE401 568 C~2TuK 2015 03 20.507907 11 50 48.611 +00 55 09.86 24.2i 15FE401 568 C~2TuK 2015 03 20.510690 11 50 48.598 +00 55 09.95 24.2i 15FE401 568 C~2TuK 2015 03 20.549193 11 50 48.429 +00 55 11.00 24.2i 15FE401 568 C~2TuK 2015 03 25.463329 11 50 27.185 +00 57 25.60 25.7g 15FE401 568 C~2TuK 2015 03 25.491399 11 50 27.065 +00 57 26.74 25.6g 15FE401 568 C~2TuK 2015 03 25.521725 11 50 26.928 +00 57 27.57 25.6g 15FE401 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 0.01 0.00 -0.05
2 0.0001 -1.93 0.11 -0.07 -0.10
3 0.0002 -4.39 -0.16 -0.05 -0.04
4 0.0002 -6.32 -0.07 -0.12 -0.09
5 0.0053 -137.55 0.05 -0.95 0.09
6 0.0055 -142.89 0.04 -1.02 0.10
7 0.0055 -143.10 0.03 -1.01 0.11
8 0.0056 -145.84 0.04 -1.05 0.10
9 0.0191 -491.71 0.08 -4.18 -0.27
10 0.0192 -493.82 -0.03 -3.84 0.09
11 0.0193 -496.03 -0.09 -3.90 0.06
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.
15FE401 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