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: 15OF203 # Created Sun Oct 19 01:11:03 2025 # Orbit generated from Bernstein formalism # Fitting 17 observations of 17 # Arc: 38.96d # First observation: 2015/07/12 # Last observation: 2015/08/20 Preliminary a, adot, b, bdot, g, gdot: 0.000002 0.027092 -0.000004 0.002549 0.025699 0.000000 # Chi-squared of fit: 7.31 DOF: 28 RMS: 0.12 # Min/Max residuals: -0.31 0.23 # Exact a, adot, b, bdot, g, gdot: 1.559187E-05 2.451581E-02 1.626804E-06 2.736558E-03 2.506927E-02 -5.098079E-03 # Covariance matrix: 4.8891E-13 -2.0900E-11 -1.9922E-14 2.3995E-12 -5.6274E-13 1.1290E-09 -2.0900E-11 1.2012E-07 -1.6433E-10 -1.0026E-08 2.4886E-08 1.4749E-06 -1.9922E-14 -1.6433E-10 5.1864E-13 1.0375E-11 -3.4743E-11 -2.3132E-09 2.3995E-12 -1.0026E-08 1.0375E-11 8.9128E-10 -2.0640E-09 -1.1705E-07 -5.6274E-13 2.4886E-08 -3.4743E-11 -2.0640E-09 5.2063E-09 3.2646E-07 1.1290E-09 1.4749E-06 -2.3132E-09 -1.1705E-07 3.2646E-07 2.7089E-05 # lat0 lon0 xBary yBary zBary JD0 11.594044 -25.460216 0.716672 0.145265 -0.707589 2457215.947879 # Heliocentric elements and errors Epoch: 2457210.5000 = 2015/07/07 Mean Anomaly: 291.20946 +/- 16.331 Argument of Peri: 154.71721 +/- 2.977 Long of Asc Node: 273.76054 +/- 0.548 Inclination: 13.12590 +/- 0.071 Eccentricity: 0.22260213 +/- 0.2079 Semi-Major Axis: 42.00194849 +/- 3.2609 Time of Perihelion: 2476209.4163 +/- 3930.5 Perihelion: 32.65222514 +/- 9.0926 Aphelion: 51.35167184 +/- 9.5992 Period (y) 272.2152 +/- 31.70 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 35.62162542 +/- 0.1015 Ecliptic Y -17.75527841 +/- 0.0483 Ecliptic Z 8.01695612 +/- 0.0231 Ecliptic XDOT 0.00060200 +/- 0.0005 Ecliptic YDOT 0.00267139 +/- 0.0002 Ecliptic ZDOT 0.00018093 +/- 0.0001 # Distances at JD0 (AU) Heliocenter to KBO 40.60075977 +/- 0.0917 Geocenter to KBO 39.88947984 +/- 0.1148 # Hcoef: 8.70
The following table shows the complete astrometric record for 15OF203. 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 (15OF203) followed by the observatory code and reference code for the source of the astrometry.
2015 07 12.44709 22 08 48.20 +00 58 02.5 24.9z 15OF203 T09 C~91Vm 2015 07 12.49036 22 08 48.06 +00 58 02.3 24.2z 15OF203 T09 C~91Vm 2015 07 20.43187 22 08 19.68 +00 57 09.9 24.6i 15OF203 T09 C~91Vm 2015 07 20.47209 22 08 19.53 +00 57 09.6 24.8i 15OF203 T09 C~91Vm 2015 07 20.49129 22 08 19.46 +00 57 09.6 24.7i 15OF203 T09 C~91Vm 2015 07 20.51603 22 08 19.35 +00 57 09.2 24.6i 15OF203 T09 C~91Vm 2015 07 20.53526 22 08 19.30 +00 57 09.2 25.4i 15OF203 T09 C~91Vm 2015 08 11.46803 22 06 45.96 +00 51 51.2 23.9i 15OF203 T09 C~91Vm 2015 08 11.47685 22 06 45.94 +00 51 51.2 24.2i 15OF203 T09 C~91Vm 2015 08 11.48495 22 06 45.90 +00 51 50.9 25.0i 15OF203 T09 C~91Vm 2015 08 11.51190 22 06 45.76 +00 51 50.4 24.5i 15OF203 T09 C~91Vm 2015 08 20.33325 22 06 04.64 +00 48 40.9 24.1z 15OF203 T09 C~91Vm 2015 08 20.37588 22 06 04.46 +00 48 40.0 25.0z 15OF203 T09 C~91Vm 2015 08 20.38397 22 06 04.42 +00 48 39.8 23.8z 15OF203 T09 C~91Vm 2015 08 20.39208 22 06 04.39 +00 48 39.8 24.9z 15OF203 T09 C~91Vm 2015 08 20.40018 22 06 04.33 +00 48 39.7 24.8z 15OF203 T09 C~91Vm 2015 08 20.41097 22 06 04.29 +00 48 39.2 24.1z 15OF203 T09 C~91Vm
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 -0.03 0.00 0.02
2 0.0001 -2.03 0.08 0.57 -0.03
3 0.0219 -418.09 -0.15 104.56 -0.06
4 0.0220 -420.29 -0.05 105.09 -0.04
5 0.0220 -421.27 0.08 105.47 0.09
6 0.0221 -422.96 -0.18 105.69 -0.00
7 0.0221 -423.66 0.22 105.96 0.02
8 0.0822 -1844.41 -0.17 312.16 0.01
9 0.0822 -1844.69 0.19 312.27 0.06
10 0.0822 -1845.36 0.11 312.21 -0.06
11 0.0823 -1847.49 -0.07 312.49 0.04
12 0.1065 -2491.20 -0.31 357.28 -0.04
13 0.1066 -2494.05 0.05 357.41 -0.09
14 0.1066 -2494.68 0.03 357.44 -0.10
15 0.1066 -2495.10 0.22 357.61 0.03
16 0.1066 -2495.97 -0.05 357.84 0.23
17 0.1067 -2496.71 0.03 357.58 -0.07
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.
15OF203 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