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: 15FS401 # Created Sun Apr 27 01:10:22 2025 # Orbit generated from Bernstein formalism # Fitting 24 observations of 24 # Arc: 65.90d # First observation: 2015/03/18 # Last observation: 2015/05/23 Preliminary a, adot, b, bdot, g, gdot: -0.000000 0.023343 0.000002 0.008606 0.022658 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 9.16 DOF: 43 RMS: 0.11 # Min/Max residuals: -0.30 0.33 # Exact a, adot, b, bdot, g, gdot: 1.316102E-05 1.782582E-02 6.689881E-06 8.829718E-03 2.179748E-02 5.318822E-04 # Covariance matrix: 3.2062E-13 1.6758E-10 4.2387E-14 -5.9349E-12 2.8012E-11 -1.5384E-09 1.6758E-10 2.8391E-07 8.5152E-11 -1.2005E-08 4.3224E-08 -3.7837E-06 4.2387E-14 8.5152E-11 1.3332E-13 -4.3305E-12 1.2794E-11 -1.1848E-09 -5.9349E-12 -1.2005E-08 -4.3305E-12 5.2907E-10 -1.8029E-09 1.6730E-07 2.8012E-11 4.3224E-08 1.2794E-11 -1.8029E-09 6.6315E-09 -5.6122E-07 -1.5384E-09 -3.7837E-06 -1.1848E-09 1.6730E-07 -5.6122E-07 5.4781E-05 # lat0 lon0 xBary yBary zBary JD0 -2.001732 178.677454 0.023268 -0.034516 -0.991276 2457099.960328 # Heliocentric elements and errors Epoch: 2457090.5000 = 2015/03/09 Mean Anomaly: 100.75761 +/- 112.201 Argument of Peri: 251.60900 +/- 113.355 Long of Asc Node: 182.60685 +/- 0.124 Inclination: 26.36080 +/- 0.716 Eccentricity: 0.02853333 +/- 0.3658 Semi-Major Axis: 46.58620392 +/- 0.6022 Time of Perihelion: 2424584.7828 +/- 36192.0 Perihelion: 45.25694437 +/- 17.0502 Aphelion: 47.91546347 +/- 17.0514 Period (y) 317.9759 +/- 6.17 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -46.83086807 +/- 0.1712 Ecliptic Y 1.10421164 +/- 0.0040 Ecliptic Z -1.60214414 +/- 0.0060 Ecliptic XDOT -0.00016057 +/- 0.0009 Ecliptic YDOT -0.00224173 +/- 0.0001 Ecliptic ZDOT 0.00110613 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 46.87127429 +/- 0.1711 Geocenter to KBO 45.87685290 +/- 0.1714 # Hcoef: 7.26
The following table shows the complete astrometric record for 15FS401. 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 (15FS401) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.45955 11 51 57.70 -01 18 38.1 23.9r 15FS401 T09 C~8nbx 2015 03 18.49690 11 51 57.57 -01 18 37.1 24.0r 15FS401 T09 C~8nbx 2015 03 18.52535 11 51 57.43 -01 18 36.0 23.8r 15FS401 T09 C~8nbx 2015 03 18.52754 11 51 57.43 -01 18 36.0 23.8r 15FS401 T09 C~8nbx 2015 03 18.55365 11 51 57.32 -01 18 35.2 23.9r 15FS401 T09 C~8nbx 2015 03 20.40205 11 51 49.91 -01 17 37.1 23.4i 15FS401 T09 C~8nbx 2015 03 20.44705 11 51 49.73 -01 17 35.6 23.8i 15FS401 T09 C~8nbx 2015 03 20.48579 11 51 49.57 -01 17 34.2 23.9i 15FS401 T09 C~8nbx 2015 03 22.459904 11 51 41.699 -01 16 32.26 23.4i 15FS401 568 C~2TuK 2015 03 22.496335 11 51 41.549 -01 16 31.11 23.3i 15FS401 568 C~2TuK 2015 03 22.518396 11 51 41.460 -01 16 30.44 23.4i 15FS401 568 C~2TuK 2015 03 25.474187 11 51 29.673 -01 14 57.29 24.2g 15FS401 568 C~2TuK 2015 03 25.502434 11 51 29.556 -01 14 56.32 24.2g 15FS401 568 C~2TuK 2015 03 25.504579 11 51 29.551 -01 14 56.29 24.1g 15FS401 568 C~2TuK 2015 03 25.547524 11 51 29.377 -01 14 54.89 24.0g 15FS401 568 C~2TuK 2015 05 21.30387 11 48 39.80 -00 50 02.2 23.9i 15FS401 T09 C~8nbx 2015 05 21.31338 11 48 39.79 -00 50 02.2 24.2i 15FS401 T09 C~8nbx 2015 05 21.32146 11 48 39.78 -00 50 01.9 23.7i 15FS401 T09 C~8nbx 2015 05 21.36227 11 48 39.72 -00 50 01.2 24.4i 15FS401 T09 C~8nbx 2015 05 23.28882 11 48 37.13 -00 49 29.4 23.5z 15FS401 T09 C~8nbx 2015 05 23.30637 11 48 37.11 -00 49 29.1 23.9z 15FS401 T09 C~8nbx 2015 05 23.33270 11 48 37.09 -00 49 28.8 23.7z 15FS401 T09 C~8nbx 2015 05 23.35010 11 48 37.05 -00 49 28.6 24.0z 15FS401 T09 C~8nbx 2015 05 23.36165 11 48 37.04 -00 49 28.4 24.0z 15FS401 T09 C~8nbx
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 -0.06
2 0.0001 -2.19 0.33 0.14 -0.08
3 0.0002 -4.55 -0.09 0.32 -0.04
4 0.0002 -4.55 0.06 0.32 -0.05
5 0.0003 -6.38 0.02 0.39 -0.09
6 0.0053 -131.44 -0.22 9.50 -0.14
7 0.0054 -134.52 -0.20 9.80 -0.04
8 0.0055 -137.28 -0.30 10.13 0.11
9 0.0110 -270.21 0.15 20.00 0.08
10 0.0111 -272.73 0.12 20.17 0.07
11 0.0111 -274.22 0.14 20.25 0.05
12 0.0192 -473.45 0.04 35.39 0.01
13 0.0193 -475.45 -0.03 35.59 0.06
14 0.0193 -475.53 0.03 35.58 0.05
15 0.0194 -478.48 0.00 35.83 0.09
16 0.1748 -3405.98 -0.12 393.27 0.01
17 0.1748 -3406.11 0.00 393.21 -0.11
18 0.1748 -3406.37 -0.04 393.42 0.05
19 0.1750 -3407.48 -0.03 393.71 0.06
20 0.1802 -3455.78 -0.09 407.42 0.03
21 0.1803 -3456.18 -0.05 407.58 0.07
22 0.1804 -3456.57 0.21 407.73 0.05
23 0.1804 -3457.20 0.01 407.68 -0.12
24 0.1804 -3457.42 0.08 407.80 -0.08
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.
15FS401 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