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: 15OY203 # Created Sun Oct 19 01:11:04 2025 # Orbit generated from Bernstein formalism # Fitting 12 observations of 12 # Arc: 89.80d # First observation: 2015/07/12 # Last observation: 2015/10/10 Preliminary a, adot, b, bdot, g, gdot: -0.000002 0.023538 0.000002 -0.000241 0.024467 0.000000 # Chi-squared of fit: 3.54 DOF: 18 RMS: 0.10 # Min/Max residuals: -0.19 0.26 # Exact a, adot, b, bdot, g, gdot: 1.521751E-05 2.413037E-02 -3.603003E-07 -2.358591E-04 2.457852E-02 4.803475E-03 # Covariance matrix: 7.1729E-13 4.9347E-12 -1.1414E-13 3.5484E-13 8.5997E-12 1.4503E-09 4.9347E-12 6.0020E-08 -1.7773E-10 3.3428E-10 1.2690E-08 4.1638E-07 -1.1414E-13 -1.7773E-10 7.3331E-13 -1.9608E-12 -3.8938E-11 -1.4919E-09 3.5484E-13 3.3428E-10 -1.9608E-12 1.4460E-11 7.5191E-11 3.1806E-09 8.5997E-12 1.2690E-08 -3.8938E-11 7.5191E-11 2.7865E-09 1.0773E-07 1.4503E-09 4.1638E-07 -1.4919E-09 3.1806E-09 1.0773E-07 6.6559E-06 # lat0 lon0 xBary yBary zBary JD0 11.571039 -24.907204 0.723611 0.143586 -0.700838 2457215.947879 # Heliocentric elements and errors Epoch: 2457210.5000 = 2015/07/07 Mean Anomaly: 65.36177 +/- 10.117 Argument of Peri: 5.44646 +/- 3.775 Long of Asc Node: 242.44972 +/- 0.154 Inclination: 11.37593 +/- 0.001 Eccentricity: 0.18431527 +/- 0.1092 Semi-Major Axis: 43.37742236 +/- 2.3027 Time of Perihelion: 2438264.5955 +/- 2514.7 Perihelion: 35.38230083 +/- 5.0957 Aphelion: 51.37254388 +/- 5.4658 Period (y) 285.6958 +/- 22.75 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 36.49272769 +/- 0.0776 Ecliptic Y -17.74394444 +/- 0.0361 Ecliptic Z 8.16094249 +/- 0.0176 Ecliptic XDOT 0.00160994 +/- 0.0003 Ecliptic YDOT 0.00220867 +/- 0.0001 Ecliptic ZDOT 0.00008165 +/- 0.0001 # Distances at JD0 (AU) Heliocenter to KBO 41.39043030 +/- 0.0703 Geocenter to KBO 40.68592922 +/- 0.0874 # Hcoef: 8.66
The following table shows the complete astrometric record for 15OY203. 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 (15OY203) followed by the observatory code and reference code for the source of the astrometry.
2015 07 12.44709 22 10 51.51 +01 08 27.4 23.9z 15OY203 T09 C~94qh 2015 07 12.46063 22 10 51.46 +01 08 27.2 24.6z 15OY203 T09 C~94qh 2015 07 20.43187 22 10 24.16 +01 07 25.3 24.5i 15OY203 T09 C~94qh 2015 07 20.45303 22 10 24.08 +01 07 25.1 24.5i 15OY203 T09 C~94qh 2015 07 20.47209 22 10 24.01 +01 07 24.8 24.6i 15OY203 T09 C~94qh 2015 07 20.49129 22 10 23.93 +01 07 25.0 25.1i 15OY203 T09 C~94qh 2015 07 20.51603 22 10 23.84 +01 07 24.6 24.8i 15OY203 T09 C~94qh 2015 07 20.51872 22 10 23.84 +01 07 24.6 24.7i 15OY203 T09 C~94qh 2015 07 20.53526 22 10 23.77 +01 07 24.1 24.9i 15OY203 T09 C~94qh 2015 10 10.22382 22 04 50.57 +00 34 00.5 25.0r 15OY203 T09 C~94qh 2015 10 10.22880 22 04 50.57 +00 34 00.3 24.5r 15OY203 T09 C~94qh 2015 10 10.24363 22 04 50.52 +00 33 59.8 25.0r 15OY203 T09 C~94qh
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 0.04
2 0.0000 -0.77 -0.06 0.08 -0.04
3 0.0219 -404.94 0.02 90.10 -0.06
4 0.0219 -406.13 0.00 90.35 -0.04
5 0.0220 -407.22 -0.02 90.45 -0.15
6 0.0220 -408.27 0.00 91.07 0.26
7 0.0221 -409.67 -0.02 91.18 0.11
8 0.0221 -409.67 0.13 91.18 0.08
9 0.0221 -410.83 -0.11 91.09 -0.19
10 0.2458 -5796.10 -0.08 27.09 0.09
11 0.2458 -5796.17 0.10 26.91 -0.03
12 0.2458 -5797.05 -0.03 26.71 -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.
15OY203 quality flag:1 Type: 7:4EEE CENTAURR CLASSICAL axisobj 43.613 57.133 39.916 ecceobj 0.183 0.476 0.054 incobj 11.387 11.385 11.389 qmin 34.469 29.595 36.222 qmax 53.704 84.599 43.752 amean 43.726 56.802 39.865 amin 43.258 56.104 39.533 amax 44.291 57.249 40.199 emean 0.183 0.473 0.042 emin 0.158 0.464 0.000 emax 0.213 0.480 0.089 imean 13.197 12.584 13.422 imin 11.863 12.477 11.567 imax 14.040 12.724 15.385 excite_mean 0.293 0.521 0.237 fracstop 1.000 0.002 1.000 cjmean 2.995 2.895 2.991 libcent 0 183.4 -180.0 -180.0 libamp 0 146.6 -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 161.1 13.1 178.4 kozaiamp 180.0 1.4 179.9