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: 15FP495 # Created Tue Apr 1 01:10:22 2025 # Orbit generated from Bernstein formalism # Fitting 13 observations of 13 # Arc: 65.90d # First observation: 2015/03/18 # Last observation: 2015/05/23 Preliminary a, adot, b, bdot, g, gdot: -0.000000 0.031664 0.000001 0.002477 0.025985 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 6.20 DOF: 21 RMS: 0.12 # Min/Max residuals: -0.28 0.22 # Exact a, adot, b, bdot, g, gdot: 1.552620E-05 2.490512E-02 1.589165E-06 2.641364E-03 2.491364E-02 -4.841935E-03 # Covariance matrix: 1.0121E-12 1.0233E-09 1.9199E-13 -2.4841E-11 1.6249E-10 -1.1046E-08 1.0233E-09 1.7195E-06 3.3045E-10 -4.2801E-08 2.6525E-07 -2.0520E-05 1.9199E-13 3.3045E-10 2.4342E-13 -9.3369E-12 5.0878E-11 -3.9694E-09 -2.4841E-11 -4.2801E-08 -9.3369E-12 1.0856E-09 -6.5894E-09 5.1428E-07 1.6249E-10 2.6525E-07 5.0878E-11 -6.5894E-09 4.1009E-08 -3.1418E-06 -1.1046E-08 -2.0520E-05 -3.9694E-09 5.1428E-07 -3.1418E-06 2.5114E-04 # lat0 lon0 xBary yBary zBary JD0 -1.734329 178.545480 0.020983 -0.029891 -0.991477 2457099.960328 # Heliocentric elements and errors Epoch: 2457090.5000 = 2015/03/09 Mean Anomaly: 307.87636 +/- 32.197 Argument of Peri: 58.60874 +/- 27.298 Long of Asc Node: 194.07934 +/- 0.889 Inclination: 6.28406 +/- 0.349 Eccentricity: 0.21109516 +/- 0.6704 Semi-Major Axis: 45.51690043 +/- 16.6957 Time of Perihelion: 2473330.6366 +/- 4560.1 Perihelion: 35.90850318 +/- 33.2351 Aphelion: 55.12529767 +/- 36.6052 Period (y) 307.0911 +/- 168.96 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -41.10156461 +/- 0.3260 Ecliptic Y 1.06435727 +/- 0.0083 Ecliptic Z -1.21472352 +/- 0.0099 Ecliptic XDOT 0.00045001 +/- 0.0017 Ecliptic YDOT -0.00275508 +/- 0.0002 Ecliptic ZDOT 0.00030633 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.13328364 +/- 0.3258 Geocenter to KBO 40.13866152 +/- 0.3263 # Hcoef: 8.31
The following table shows the complete astrometric record for 15FP495. 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 (15FP495) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.45955 11 51 54.18 -01 00 46.0 24.2r 15FP495 T09 C~8iak 2015 03 18.57089 11 51 53.66 -01 00 42.6 24.3r 15FP495 T09 C~8iak 2015 03 20.44705 11 51 45.17 -00 59 44.1 23.9i 15FP495 T09 C~8iak 2015 03 20.48579 11 51 44.99 -00 59 43.3 23.8i 15FP495 T09 C~8iak 2015 03 20.52466 11 51 44.81 -00 59 41.8 23.9i 15FP495 T09 C~8iak 2015 03 20.52736 11 51 44.79 -00 59 41.8 24.0i 15FP495 T09 C~8iak 2015 03 25.43724 11 51 22.61 -00 57 09.3 25.8g 15FP495 T09 C~8iak 2015 03 25.47420 11 51 22.46 -00 57 07.9 25.7g 15FP495 T09 C~8iak 2015 03 25.50245 11 51 22.32 -00 57 06.9 25.2g 15FP495 T09 C~8iak 2015 05 23.30637 11 48 08.06 -00 33 00.1 23.9z 15FP495 T09 C~8iak 2015 05 23.31512 11 48 08.05 -00 32 59.6 24.1z 15FP495 T09 C~8iak 2015 05 23.33270 11 48 08.02 -00 32 59.8 24.0z 15FP495 T09 C~8iak 2015 05 23.36165 11 48 07.99 -00 32 59.1 23.9z 15FP495 T09 C~8iak
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 0.06 0.00 0.02
2 0.0003 -8.51 -0.02 0.02 -0.07
3 0.0054 -148.60 -0.04 3.05 0.22
4 0.0055 -151.40 0.10 2.71 -0.16
5 0.0057 -154.47 -0.03 3.01 0.10
6 0.0057 -154.74 -0.10 2.89 -0.02
7 0.0191 -520.61 -0.04 10.51 -0.28
8 0.0192 -523.23 0.13 10.90 0.06
9 0.0193 -525.55 -0.07 10.98 0.11
10 0.1803 -3774.71 0.01 179.21 -0.16
11 0.1803 -3775.04 -0.10 179.61 0.21
12 0.1804 -3775.38 0.02 179.25 -0.21
13 0.1804 -3776.07 0.07 179.71 0.16
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.
15FP495 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