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: 15OC203 # Created Wed Sep 3 01:10:52 2025 # Orbit generated from Bernstein formalism # Fitting 31 observations of 31 # Arc: 0.84y # First observation: 2014/09/18 # Last observation: 2015/07/23 Preliminary a, adot, b, bdot, g, gdot: -0.000004 0.026237 -0.000000 0.002153 0.025660 0.000000 # Chi-squared of fit: 13.54 DOF: 56 RMS: 0.12 # Min/Max residuals: -0.37 0.21 # Exact a, adot, b, bdot, g, gdot: 1.563278E-05 2.623600E-02 1.146742E-06 2.160358E-03 2.579836E-02 -8.123679E-04 # Covariance matrix: 1.6642E-13 1.5215E-11 8.1540E-15 6.7675E-13 5.2508E-12 4.6065E-10 1.5215E-11 1.1391E-08 2.9396E-12 4.1012E-10 2.2852E-09 3.0251E-07 8.1540E-15 2.9396E-12 7.9272E-14 1.9678E-14 7.2530E-13 8.1434E-11 6.7675E-13 4.1012E-10 1.9678E-14 1.5288E-11 8.6330E-11 1.0993E-08 5.2508E-12 2.2852E-09 7.2530E-13 8.6330E-11 5.2875E-10 6.2435E-08 4.6065E-10 3.0251E-07 8.1434E-11 1.0993E-08 6.2435E-08 8.0775E-06 # lat0 lon0 xBary yBary zBary JD0 10.476646 -23.476847 -0.318954 0.173854 -0.939649 2456918.744728 # Heliocentric elements and errors Epoch: 2456910.5000 = 2014/09/10 Mean Anomaly: 332.49260 +/- 101.787 Argument of Peri: 96.13250 +/- 114.317 Long of Asc Node: 271.54443 +/- 0.097 Inclination: 11.21825 +/- 0.008 Eccentricity: 0.04992043 +/- 0.0534 Semi-Major Axis: 41.51594712 +/- 0.1193 Time of Perihelion: 2464376.1542 +/- 27625.4 Perihelion: 39.44345328 +/- 2.2192 Aphelion: 43.58844095 +/- 2.2199 Period (y) 267.5042 +/- 1.15 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 35.96216924 +/- 0.0312 Ecliptic Y -15.27078715 +/- 0.0135 Ecliptic Z 7.04838196 +/- 0.0063 Ecliptic XDOT 0.00098851 +/- 0.0003 Ecliptic YDOT 0.00259966 +/- 0.0001 Ecliptic ZDOT 0.00020988 +/- 0.0001 # Distances at JD0 (AU) Heliocenter to KBO 39.70080912 +/- 0.0287 Geocenter to KBO 38.76215984 +/- 0.0345 # Hcoef: 8.80
The following table shows the complete astrometric record for 15OC203. 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 (15OC203) followed by the observatory code and reference code for the source of the astrometry.
2014 09 18.24395 22 17 40.85 +00 37 50.2 26.0g 15OC203 T09 C~90Hj 2014 09 18.25752 22 17 40.79 +00 37 49.7 25.8g 15OC203 T09 C~90Hj 2014 09 18.27261 22 17 40.73 +00 37 49.3 25.7g 15OC203 T09 C~90Hj 2014 09 18.28333 22 17 40.68 +00 37 49.0 25.7g 15OC203 T09 C~90Hj 2014 09 18.33407 22 17 40.46 +00 37 47.3 24.4y 15OC203 T09 C~90Hj 2014 09 18.34291 22 17 40.40 +00 37 47.2 24.3y 15OC203 T09 C~90Hj 2014 09 18.34833 22 17 40.40 +00 37 47.0 23.9y 15OC203 T09 C~90Hj 2014 09 18.36196 22 17 40.32 +00 37 46.7 24.0y 15OC203 T09 C~90Hj 2014 09 18.36743 22 17 40.28 +00 37 46.3 24.6y 15OC203 T09 C~90Hj 2014 09 18.37570 22 17 40.26 +00 37 46.1 23.5y 15OC203 T09 C~90Hj 2014 09 22.23772 22 17 23.95 +00 35 50.0 24.5r 15OC203 T09 C~90Hj 2014 09 22.25134 22 17 23.88 +00 35 49.9 24.3r 15OC203 T09 C~90Hj 2014 09 22.27709 22 17 23.78 +00 35 49.0 24.9r 15OC203 T09 C~90Hj 2014 09 22.31871 22 17 23.60 +00 35 47.7 25.1r 15OC203 T09 C~90Hj 2014 09 22.34787 22 17 23.48 +00 35 46.9 25.2i 15OC203 T09 C~90Hj 2014 09 22.35333 22 17 23.46 +00 35 46.7 24.5i 15OC203 T09 C~90Hj 2014 09 22.35604 22 17 23.46 +00 35 46.7 24.6i 15OC203 T09 C~90Hj 2014 09 22.36963 22 17 23.39 +00 35 46.2 24.2i 15OC203 T09 C~90Hj 2014 09 22.37509 22 17 23.37 +00 35 46.0 24.0i 15OC203 T09 C~90Hj 2015 07 20.45033 22 27 31.60 +01 39 24.7 24.3i 15OC203 T09 C~90Hj 2015 07 20.46939 22 27 31.53 +01 39 24.6 24.7i 15OC203 T09 C~90Hj 2015 07 20.56035 22 27 31.19 +01 39 23.9 24.6i 15OC203 T09 C~90Hj 2015 07 22.44091 22 27 24.47 +01 39 07.1 25.0z 15OC203 T09 C~90Hj 2015 07 22.45708 22 27 24.39 +01 39 07.0 24.7z 15OC203 T09 C~90Hj 2015 07 22.48140 22 27 24.29 +01 39 06.8 25.0z 15OC203 T09 C~90Hj 2015 07 22.50032 22 27 24.22 +01 39 06.5 24.6z 15OC203 T09 C~90Hj 2015 07 22.51655 22 27 24.17 +01 39 06.1 24.9z 15OC203 T09 C~90Hj 2015 07 23.45259 22 27 20.74 +01 38 57.1 24.5y 15OC203 T09 C~90Hj 2015 07 23.49892 22 27 20.57 +01 38 56.9 24.4y 15OC203 T09 C~90Hj 2015 07 23.52362 22 27 20.48 +01 38 56.7 24.2y 15OC203 T09 C~90Hj 2015 07 23.54555 22 27 20.39 +01 38 56.4 24.6y 15OC203 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 0.09 0.00 0.04
2 0.0000 -1.02 0.05 -0.14 -0.05
3 0.0001 -2.00 0.15 -0.18 -0.03
4 0.0001 -2.81 0.12 -0.19 0.00
5 0.0002 -6.50 0.09 -0.57 -0.18
6 0.0003 -7.38 -0.14 -0.33 0.09
7 0.0003 -7.45 0.18 -0.52 -0.08
8 0.0003 -8.68 -0.06 -0.36 0.13
9 0.0003 -9.38 -0.37 -0.51 0.00
10 0.0004 -9.74 -0.13 -0.59 -0.04
11 0.0109 -279.87 -0.03 -19.42 -0.17
12 0.0110 -280.88 -0.09 -19.13 0.19
13 0.0110 -282.61 -0.01 -19.42 0.03
14 0.0112 -285.59 -0.09 -19.65 0.01
15 0.0112 -287.56 -0.01 -19.74 0.06
16 0.0113 -287.91 0.02 -19.81 0.01
17 0.0113 -287.91 0.21 -19.81 0.02
18 0.0113 -289.07 -0.00 -19.89 0.01
19 0.0113 -289.43 0.03 -19.97 -0.04
20 0.8356 9603.46 0.10 210.91 -0.03
21 0.8357 9602.44 0.10 211.20 0.03
22 0.8359 9597.43 -0.03 212.41 0.14
23 0.8411 9497.25 0.20 233.46 -0.08
24 0.8411 9496.10 -0.06 233.81 0.08
25 0.8412 9494.63 -0.18 234.17 0.16
26 0.8412 9493.54 -0.22 234.27 0.04
27 0.8413 9492.69 -0.16 234.17 -0.25
28 0.8438 9441.41 -0.07 244.52 -0.19
29 0.8440 9438.96 0.10 245.27 0.03
30 0.8440 9437.62 0.17 245.57 0.05
31 0.8441 9436.26 0.04 245.78 0.01
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.
15OC203 quality flag:1 Type: CLASSICAL SCATNEAR CLASSICAL axisobj 41.788 46.280 41.556 ecceobj 0.056 0.285 0.059 incobj 11.226 11.252 11.227 qmin 38.502 30.736 38.139 qmax 45.100 66.322 45.125 amean 41.722 45.159 41.490 amin 41.409 40.315 41.175 amax 42.061 49.020 41.821 emean 0.057 0.280 0.061 emin 0.041 0.189 0.044 emax 0.073 0.354 0.079 imean 13.102 11.005 13.190 imin 12.219 5.451 12.129 imax 13.881 14.582 14.009 excite_mean 0.234 0.341 0.236 fracstop 1.000 1.000 1.000 cjmean 3.010 2.972 3.006 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 178.6 174.6 180.9 kozaiamp 180.0 180.0 180.0