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: 15FB490 # Created Sun Feb 23 02:10:20 2025 # Orbit generated from Bernstein formalism # Fitting 22 observations of 22 # Arc: 65.89d # First observation: 2015/03/18 # Last observation: 2015/05/23 Preliminary a, adot, b, bdot, g, gdot: -0.000000 0.028678 0.000000 0.000108 0.024354 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 8.71 DOF: 39 RMS: 0.11 # Min/Max residuals: -0.27 0.18 # Exact a, adot, b, bdot, g, gdot: 1.460768E-05 2.160470E-02 3.868212E-07 1.153215E-04 2.323425E-02 4.420742E-03 # Covariance matrix: 1.6674E-12 2.5871E-09 4.2888E-14 -2.8157E-12 3.9411E-10 -3.1313E-08 2.5871E-09 4.7627E-06 7.9216E-11 -5.2037E-09 7.2200E-07 -5.8527E-05 4.2888E-14 7.9216E-11 1.0294E-13 -8.4623E-13 1.2007E-11 -9.7393E-10 -2.8157E-12 -5.2037E-09 -8.4623E-13 2.2396E-11 -7.8872E-10 6.3983E-08 3.9411E-10 7.2200E-07 1.2007E-11 -7.8872E-10 1.0947E-07 -8.8669E-06 -3.1313E-08 -5.8527E-05 -9.7393E-10 6.3983E-08 -8.8669E-06 7.2071E-04 # lat0 lon0 xBary yBary zBary JD0 -0.081463 -179.741108 0.050325 -0.001281 -0.990876 2457099.977938 # Heliocentric elements and errors Epoch: 2457090.5000 = 2015/03/09 Mean Anomaly: 75.70577 +/- 115.492 Argument of Peri: 246.64297 +/- 11.051 Long of Asc Node: 194.73991 +/- 1.634 Inclination: 0.31685 +/- 0.035 Eccentricity: 0.20041106 +/- 1.1994 Semi-Major Axis: 44.46829591 +/- 15.9456 Time of Perihelion: 2434313.2856 +/- 32516.0 Perihelion: 35.55635743 +/- 54.8391 Aphelion: 53.38023439 +/- 56.6671 Period (y) 296.5404 +/- 159.50 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -44.03363903 +/- 0.6129 Ecliptic Y -0.14882279 +/- 0.0027 Ecliptic Z -0.06116125 +/- 0.0009 Ecliptic XDOT -0.00051285 +/- 0.0032 Ecliptic YDOT -0.00255393 +/- 0.0002 Ecliptic ZDOT 0.00001294 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 44.03393299 +/- 0.6129 Geocenter to KBO 43.03990643 +/- 0.6129 # Hcoef: 7.61
The following table shows the complete astrometric record for 15FB490. 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 (15FB490) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.47716 12 00 49.23 -00 10 39.8 24.1r 15FB490 T09 C~8eRg 2015 03 18.50997 12 00 49.08 -00 10 38.8 23.8r 15FB490 T09 C~8eRh 2015 03 18.56659 12 00 48.84 -00 10 37.3 23.8r 15FB490 T09 C~8eRh 2015 03 20.42312 12 00 40.85 -00 09 44.9 23.4i 15FB490 T09 C~8eRh 2015 03 20.46343 12 00 40.67 -00 09 43.9 23.3i 15FB490 T09 C~8eRh 2015 03 20.49142 12 00 40.54 -00 09 43.4 23.5i 15FB490 T09 C~8eRh 2015 03 20.50240 12 00 40.49 -00 09 42.9 23.4i 15FB490 T09 C~8eRh 2015 03 25.48707 12 00 19.02 -00 07 22.8 25.3g 15FB490 T09 C~8eRh 2015 03 25.51323 12 00 18.88 -00 07 22.0 25.1g 15FB490 T09 C~8eRh 2015 03 25.51534 12 00 18.89 -00 07 22.0 24.7g 15FB490 T09 C~8eRh 2015 03 25.54330 12 00 18.78 -00 07 21.1 25.5g 15FB490 T09 C~8eRh 2015 03 29.27997 12 00 02.78 -00 05 37.0 23.9y 15FB490 T09 C~8eRh 2015 03 29.29907 12 00 02.71 -00 05 36.3 24.0y 15FB490 T09 C~8eRh 2015 03 29.31803 12 00 02.63 -00 05 36.0 23.1y 15FB490 T09 C~8eRh 2015 03 29.33718 12 00 02.54 -00 05 35.1 23.6y 15FB490 T09 C~8eRh 2015 03 29.33991 12 00 02.54 -00 05 35.1 23.1y 15FB490 T09 C~8eRh 2015 03 29.35626 12 00 02.45 -00 05 34.6 24.1y 15FB490 T09 C~8eRh 2015 03 29.42373 12 00 02.16 -00 05 32.8 23.4y 15FB490 T09 C~8eRh 2015 05 23.27714 11 57 06.11 +00 13 39.3 23.4z 15FB490 T09 C~8eRh 2015 05 23.29468 11 57 06.09 +00 13 39.8 23.9z 15FB490 T09 C~8eRh 2015 05 23.33848 11 57 06.01 +00 13 40.1 23.6z 15FB490 T09 C~8eRh 2015 05 23.36453 11 57 05.97 +00 13 40.4 23.8z 15FB490 T09 C~8eRh
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 0.02 0.00 -0.06
2 0.0001 -2.46 -0.10 0.02 -0.03
3 0.0002 -6.36 0.05 -0.03 -0.06
4 0.0053 -137.16 0.01 0.37 0.18
5 0.0054 -140.04 0.03 0.21 0.04
6 0.0055 -142.03 0.04 -0.10 -0.27
7 0.0055 -142.91 -0.06 0.06 -0.10
8 0.0192 -494.12 0.12 0.49 0.03
9 0.0193 -496.36 -0.26 0.39 -0.07
10 0.0193 -496.23 0.02 0.45 -0.00
11 0.0193 -498.10 0.14 0.62 0.17
12 0.0296 -759.70 -0.05 0.66 -0.17
13 0.0296 -760.95 0.06 0.89 0.06
14 0.0297 -762.17 0.17 0.68 -0.13
15 0.0297 -763.76 -0.07 0.97 0.16
16 0.0297 -763.76 0.12 0.97 0.16
17 0.0298 -765.20 -0.16 0.89 0.09
18 0.0300 -769.91 -0.09 0.82 0.04
19 0.1802 -3651.40 0.01 7.41 -0.19
20 0.1802 -3651.87 0.01 7.75 0.16
21 0.1803 -3653.10 -0.03 7.55 -0.03
22 0.1804 -3653.77 -0.00 7.58 0.01
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.
15FB490 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