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: 15OB203 # Created Sun Oct 19 01:11:03 2025 # Orbit generated from Bernstein formalism # Fitting 21 observations of 21 # Arc: 1.00y # First observation: 2015/07/12 # Last observation: 2016/07/12 Preliminary a, adot, b, bdot, g, gdot: -0.000021 0.033270 0.000004 -0.005835 0.025887 0.000000 # Chi-squared of fit: 3.76 DOF: 36 RMS: 0.07 # Min/Max residuals: -0.20 0.14 # Exact a, adot, b, bdot, g, gdot: 1.945897E-05 3.285487E-02 -3.115396E-06 -5.762729E-03 2.622749E-02 -1.188951E-02 # Covariance matrix: 3.7621E-13 1.2866E-11 -3.5073E-14 -2.2960E-12 6.7767E-12 3.9837E-10 1.2866E-11 1.9666E-09 -3.0040E-12 -3.4603E-10 7.4219E-10 5.9362E-08 -3.5073E-14 -3.0040E-12 2.2071E-13 3.1194E-13 -1.4987E-12 -9.1373E-11 -2.2960E-12 -3.4603E-10 3.1194E-13 6.1218E-11 -1.3047E-10 -1.0447E-08 6.7767E-12 7.4219E-10 -1.4987E-12 -1.3047E-10 3.2461E-10 2.2490E-08 3.9837E-10 5.9362E-08 -9.1373E-11 -1.0447E-08 2.2490E-08 1.7923E-06 # lat0 lon0 xBary yBary zBary JD0 12.003402 -22.792276 0.749738 0.143165 -0.672904 2457215.929009 # Heliocentric elements and errors Epoch: 2457210.5000 = 2015/07/07 Mean Anomaly: 356.97844 +/- 0.955 Argument of Peri: 175.80767 +/- 3.285 Long of Asc Node: 205.62908 +/- 0.047 Inclination: 15.33870 +/- 0.011 Eccentricity: 0.81572644 +/- 0.0432 Semi-Major Axis: 181.24065689 +/- 37.8966 Time of Perihelion: 2464690.6511 +/- 285.7 Perihelion: 33.39786083 +/- 10.4938 Aphelion: 329.08345296 +/- 69.2543 Period (y) 2440.0102 +/- 765.29 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 34.72283067 +/- 0.0236 Ecliptic Y -15.40478274 +/- 0.0099 Ecliptic Z 7.92940417 +/- 0.0055 Ecliptic XDOT 0.00032246 +/- 0.0001 Ecliptic YDOT 0.00357742 +/- 0.0001 Ecliptic ZDOT -0.00084647 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 38.80538302 +/- 0.0215 Geocenter to KBO 38.12793955 +/- 0.0262 # Hcoef: 7.71
The following table shows the complete astrometric record for 15OB203. 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 (15OB203) followed by the observatory code and reference code for the source of the astrometry.
2015 07 12.42822 22 17 56.74 +02 17 49.8 23.7z 15OB203 T09 C~90Hj 2015 07 12.43901 22 17 56.70 +02 17 49.8 23.6z 15OB203 T09 C~90Hj 2015 07 12.45520 22 17 56.66 +02 17 49.7 23.2z 15OB203 T09 C~90Hj 2015 07 12.46872 22 17 56.60 +02 17 49.5 23.4z 15OB203 T09 C~90Hj 2015 07 20.44212 22 17 31.00 +02 16 43.1 23.3i 15OB203 T09 C~90Hj 2015 07 20.45844 22 17 30.95 +02 16 42.9 23.3i 15OB203 T09 C~90Hj 2015 07 20.48027 22 17 30.86 +02 16 42.7 23.2i 15OB203 T09 C~90Hj 2016 07 05.43227 22 25 47.43 +02 41 19.1 23.5i 15OB203 T09 C~90Hj 2016 07 05.44312 22 25 47.40 +02 41 19.1 23.4i 15OB203 T09 C~90Hj 2016 07 05.47311 22 25 47.32 +02 41 19.1 23.4i 15OB203 T09 C~90Hj 2016 07 05.50025 22 25 47.27 +02 41 19.1 23.3i 15OB203 T09 C~90Hj 2016 07 07.43889 22 25 42.54 +02 41 15.1 24.1g 15OB203 T09 C~90Hj 2016 07 07.46004 22 25 42.48 +02 41 15.1 24.1g 15OB203 T09 C~90Hj 2016 07 07.46850 22 25 42.46 +02 41 15.1 24.1g 15OB203 T09 C~90Hj 2016 07 12.40449 22 25 29.15 +02 40 54.1 23.2z 15OB203 T09 C~90Hj 2016 07 12.40719 22 25 29.14 +02 40 54.1 23.5z 15OB203 T09 C~90Hj 2016 07 12.42606 22 25 29.10 +02 40 54.1 23.9z 15OB203 T09 C~90Hj 2016 07 12.42876 22 25 29.08 +02 40 54.1 23.7z 15OB203 T09 C~90Hj 2016 07 12.43146 22 25 29.08 +02 40 54.1 23.0z 15OB203 T09 C~90Hj 2016 07 12.43416 22 25 29.06 +02 40 54.1 23.3z 15OB203 T09 C~90Hj 2016 07 12.43955 22 25 29.06 +02 40 54.0 23.4z 15OB203 T09 C~90Hj
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 0.07 0.00 -0.07
2 0.0000 -0.56 -0.01 0.22 0.03
3 0.0001 -1.15 0.11 0.35 -0.03
4 0.0001 -2.06 -0.20 0.49 -0.04
5 0.0219 -383.35 -0.00 79.56 0.05
6 0.0220 -384.12 0.09 79.65 -0.02
7 0.0220 -385.45 -0.07 79.96 0.09
8 0.9829 7082.45 0.02 -1273.20 -0.06
9 0.9829 7082.03 -0.02 -1273.04 -0.03
10 0.9830 7080.91 -0.11 -1272.60 0.05
11 0.9831 7080.21 0.13 -1272.33 -0.01
12 0.9884 7012.71 0.00 -1250.12 -0.09
13 0.9885 7011.87 -0.05 -1249.79 -0.01
14 0.9885 7011.59 -0.02 -1249.68 0.00
15 1.0020 6818.06 -0.09 -1196.25 -0.05
16 1.0020 6817.92 -0.12 -1196.19 -0.02
17 1.0020 6817.37 0.14 -1195.97 -0.01
18 1.0021 6817.09 -0.02 -1195.86 0.07
19 1.0021 6817.09 0.09 -1195.86 0.05
20 1.0021 6816.81 -0.07 -1195.75 0.13
21 1.0021 6816.77 0.13 -1195.85 -0.02
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.
15OB203 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