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: 15OD203
# Created Tue Sep 2 01:10:50 2025
# Orbit generated from Bernstein formalism
# Fitting 20 observations of 20
# Arc: 0.84y
# First observation: 2014/09/18
# Last observation: 2015/07/22
Preliminary a, adot, b, bdot, g, gdot:
-0.000027 0.027401 -0.000001 -0.004447 0.024184 0.000000
# Chi-squared of fit: 9.13 DOF: 34 RMS: 0.12
# Min/Max residuals: -0.22 0.28
# Exact a, adot, b, bdot, g, gdot:
1.708127E-05 2.656742E-02 -2.497343E-06 -4.415207E-03 2.472407E-02 -8.371324E-03
# Covariance matrix:
5.2487E-13 3.7097E-11 6.7378E-14 -4.7562E-12 1.4506E-11 1.1773E-09
3.7097E-11 6.1418E-09 9.5795E-12 -7.4280E-10 1.9221E-09 1.8163E-07
6.7378E-14 9.5795E-12 2.0224E-13 -1.4036E-12 3.2302E-12 2.8935E-10
-4.7562E-12 -7.4280E-10 -1.4036E-12 9.0815E-11 -2.3861E-10 -2.2127E-08
1.4506E-11 1.9221E-09 3.2302E-12 -2.3861E-10 6.7313E-10 5.8707E-08
1.1773E-09 1.8163E-07 2.8935E-10 -2.2127E-08 5.8707E-08 5.4199E-06
# lat0 lon0 xBary yBary zBary JD0
9.496236 -24.138216 -0.329820 0.157140 -0.938841 2456918.735968
# Heliocentric elements and errors
Epoch: 2456910.5000 = 2014/09/10
Mean Anomaly: 338.53260 +/- 3.462
Argument of Peri: 192.44427 +/- 7.726
Long of Asc Node: 200.06837 +/- 0.059
Inclination: 13.29497 +/- 0.014
Eccentricity: 0.45003589 +/- 0.0896
Semi-Major Axis: 64.62628533 +/- 6.5171
Time of Perihelion: 2468226.4004 +/- 633.2
Perihelion: 35.54213728 +/- 6.8104
Aphelion: 93.71043337 +/- 11.0833
Period (y) 519.5436 +/- 78.59
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 37.40550348 +/- 0.0382
Ecliptic Y -16.39976098 +/- 0.0171
Ecliptic Z 6.67289477 +/- 0.0070
Ecliptic XDOT 0.00043765 +/- 0.0002
Ecliptic YDOT 0.00302111 +/- 0.0001
Ecliptic ZDOT -0.00063505 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 41.38419234 +/- 0.0352
Geocenter to KBO 40.44641199 +/- 0.0424
# Hcoef: 8.96
The following table shows the complete astrometric record for 15OD203. 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 (15OD203) followed by the observatory code and reference code for the source of the astrometry.
2014 09 18.23519 22 16 40.88 -00 31 10.6 26.9g 15OD203 T09 C~90Hj 2014 09 18.26405 22 16 40.77 -00 31 11.5 26.6g 15OD203 T09 C~90Hj 2014 09 18.27477 22 16 40.72 -00 31 11.8 26.0g 15OD203 T09 C~90Hj 2014 09 22.22908 22 16 25.28 -00 33 15.2 25.2r 15OD203 T09 C~90Hj 2014 09 22.25775 22 16 25.16 -00 33 16.6 25.1r 15OD203 T09 C~90Hj 2014 09 22.26849 22 16 25.12 -00 33 16.7 25.4r 15OD203 T09 C~90Hj 2014 09 22.34435 22 16 24.82 -00 33 19.1 24.6i 15OD203 T09 C~90Hj 2014 09 22.36694 22 16 24.74 -00 33 19.9 24.3i 15OD203 T09 C~90Hj 2015 07 15.44387 22 27 09.07 +00 13 27.0 25.3r 15OD203 T09 C~90Hj 2015 07 15.48044 22 27 08.97 +00 13 26.8 25.6r 15OD203 T09 C~90Hj 2015 07 15.48467 22 27 08.95 +00 13 26.8 24.8r 15OD203 T09 C~90Hj 2015 07 15.50409 22 27 08.89 +00 13 26.5 25.1r 15OD203 T09 C~90Hj 2015 07 20.44763 22 26 53.50 +00 12 31.4 24.9i 15OD203 T09 C~90Hj 2015 07 20.46669 22 26 53.46 +00 12 31.0 24.7i 15OD203 T09 C~90Hj 2015 07 20.51051 22 26 53.30 +00 12 30.7 24.3i 15OD203 T09 C~90Hj 2015 07 22.42737 22 26 46.95 +00 12 05.9 24.3z 15OD203 T09 C~90Hj 2015 07 22.44630 22 26 46.89 +00 12 05.3 25.0z 15OD203 T09 C~90Hj 2015 07 22.44899 22 26 46.86 +00 12 05.3 24.6z 15OD203 T09 C~90Hj 2015 07 22.46793 22 26 46.79 +00 12 05.2 24.3z 15OD203 T09 C~90Hj 2015 07 22.51384 22 26 46.64 +00 12 04.3 24.2z 15OD203 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 -0.02 0.00 -0.07
2 0.0001 -1.86 0.08 -0.24 -0.10
3 0.0001 -2.67 -0.00 -0.25 -0.03
4 0.0109 -263.26 0.17 -31.16 0.28
5 0.0110 -265.44 -0.13 -31.81 -0.14
6 0.0110 -266.04 -0.02 -31.69 0.07
7 0.0113 -271.10 -0.08 -32.29 0.07
8 0.0113 -272.51 -0.00 -32.60 -0.06
9 0.8219 9759.21 -0.13 -927.37 -0.12
10 0.8220 9757.74 0.08 -927.01 -0.03
11 0.8220 9757.46 -0.00 -926.90 0.05
12 0.8221 9756.51 -0.06 -926.85 -0.05
13 0.8356 9520.89 -0.09 -894.31 0.06
14 0.8357 9520.19 0.18 -894.46 -0.22
15 0.8358 9517.84 0.08 -893.87 0.08
16 0.8410 9419.88 0.19 -882.37 0.23
17 0.8411 9418.82 0.14 -882.60 -0.12
18 0.8411 9418.40 -0.14 -882.44 0.03
19 0.8412 9417.38 -0.14 -882.15 0.20
20 0.8413 9414.95 -0.12 -882.17 -0.11
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.
15OD203 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