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: 13UB17 # Created Mon Apr 28 01:09:51 2025 # Orbit generated from Bernstein formalism # Fitting 32 observations of 32 # Arc: 4.05y # First observation: 2013/08/11 # Last observation: 2017/08/30 Preliminary a, adot, b, bdot, g, gdot: -0.000121 0.017120 0.000056 0.011056 0.020801 0.000000 # Chi-squared of fit: 4.82 DOF: 58 RMS: 0.07 # Min/Max residuals: -0.20 0.18 # Exact a, adot, b, bdot, g, gdot: 1.322710E-05 1.726353E-02 7.586801E-06 1.119742E-02 2.093785E-02 4.071143E-03 # Covariance matrix: 2.2962E-13 -5.0522E-14 -7.6545E-16 3.1090E-15 1.5210E-13 7.4792E-14 -5.0522E-14 2.0386E-13 -4.2657E-14 1.2564E-13 6.4387E-14 2.8037E-12 -7.6545E-16 -4.2657E-14 8.2674E-14 -5.9584E-14 -2.2326E-14 -7.0566E-13 3.1090E-15 1.2564E-13 -5.9584E-14 1.2319E-13 6.6642E-14 2.0808E-12 1.5210E-13 6.4387E-14 -2.2326E-14 6.6642E-14 1.9022E-13 1.4928E-12 7.4792E-14 2.8037E-12 -7.0566E-13 2.0808E-12 1.4928E-12 4.6449E-11 # lat0 lon0 xBary yBary zBary JD0 -0.632567 15.422068 0.848714 -0.006115 -0.557032 2456516.008328 # Heliocentric elements and errors Epoch: 2456510.5000 = 2013/08/06 Mean Anomaly: 27.23232 +/- 0.021 Argument of Peri: 310.29611 +/- 0.048 Long of Asc Node: 15.38687 +/- 0.000 Inclination: 32.85104 +/- 0.001 Eccentricity: 0.28618329 +/- 0.0003 Semi-Major Axis: 62.60753479 +/- 0.0152 Time of Perihelion: 2442823.1140 +/- 9.3 Perihelion: 44.69030429 +/- 0.0228 Aphelion: 80.52476530 +/- 0.0281 Period (y) 495.3910 +/- 0.18 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 46.80031528 +/- 0.0010 Ecliptic Y 12.03312127 +/- 0.0002 Ecliptic Z -0.52688161 +/- 0.0000 Ecliptic XDOT -0.00007779 +/- 0.0000 Ecliptic YDOT 0.00232106 +/- 0.0000 Ecliptic ZDOT 0.00145836 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 48.32538797 +/- 0.0009 Geocenter to KBO 47.76039595 +/- 0.0010 # Hcoef: 6.95
The following table shows the complete astrometric record for 13UB17. 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 (13UB17) followed by the observatory code and reference code for the source of the astrometry.
2013 08 11.50755 00 57 47.561 +05 29 18.25 23.7r 13UB17 568 C~2NKX 2013 08 30.42396 00 56 57.483 +05 26 03.70 24.7r 13UB17 568 C~2NKX 2013 08 31.42817 00 56 54.261 +05 25 50.21 23.8r 13UB17 568 C~2NKX 2013 08 31.47118 00 56 54.118 +05 25 49.71 23.9r 13UB17 568 C~2NKX 2013 10 06.38359 00 54 36.059 +05 15 25.47 23.5r 13UB17 568 C~2NKX 2013 10 06.44798 00 54 35.785 +05 15 24.34 23.8r 13UB17 568 C~2NKX 2013 10 06.45762 00 54 35.745 +05 15 24.02 23.4r 13UB17 568 C~2NKX 2013 10 06.46264 00 54 35.731 +05 15 23.93 23.7r 13UB17 568 C~2NKX 2013 10 09.51275 00 54 22.943 +05 14 25.00 23.4r 13UB17 568 C~2NKX 2013 10 31.23096 00 52 55.127 +05 07 48.28 24.0r 13UB17 568 C~2NKX 2013 10 31.27407 00 52 54.964 +05 07 47.51 23.7r 13UB17 568 C~2NKX 2013 10 31.31685 00 52 54.799 +05 07 46.80 23.6r 13UB17 568 C~2NKX 2013 11 01.25731 00 52 51.247 +05 07 31.11 23.9r 13UB17 568 C~2NKX 2013 11 01.37789 00 52 50.777 +05 07 29.32 24.3r 13UB17 568 C~2NKX 2013 11 05.38291 00 52 36.038 +05 06 25.52 23.4r 13UB17 568 C~2NKX 2013 11 29.22005 00 51 24.224 +05 01 48.49 23.7r 13UB17 568 C~2NKX 2013 12 04.24712 00 51 13.411 +05 01 17.55 23.4r 13UB17 568 C~2NKX 2013 12 04.29457 00 51 13.318 +05 01 17.36 23.6r 13UB17 568 C~2NKX 2013 12 06.21068 00 51 09.669 +05 01 08.37 23.8r 13UB17 568 C~2NKX 2014 07 24.58857 01 00 52.984 +06 27 59.61 24.3r 13UB17 568 C~2NKX 2014 08 22.54836 01 00 02.106 +06 26 00.81 23.5r 13UB17 568 C~2NKX 2014 08 28.40993 00 59 45.346 +06 24 56.84 24.1r 13UB17 568 C~2NKX 2014 10 23.37180 00 56 08.577 +06 08 52.39 23.4r 13UB17 568 C~2NKX 2014 10 27.41049 00 55 52.479 +06 07 39.38 23.3r 13UB17 568 C~2NKX 2014 11 19.20228 00 54 32.387 +06 01 51.95 23.2r 13UB17 568 C~2NKX 2014 11 19.26959 00 54 32.183 +06 01 51.23 24.1r 13UB17 568 C~2NKX 2014 11 25.21887 00 54 15.452 +06 00 45.93 23.9r 13UB17 568 C~2NKX 2015 01 17.27427 00 53 38.128 +06 02 33.90 24.0r 13UB17 568 C~2NKX 2017 07 24.57704 01 08 45.341 +09 18 05.66 24.0w 13UB17 568 C~2NKX 2017 08 25.54221 01 07 50.310 +09 17 13.02 23.7w 13UB17 568 C~2NKX 2017 08 30.48332 01 07 36.034 +09 16 27.81 23.8w 13UB17 568 C~2NKX 2017 08 30.53584 01 07 35.878 +09 16 27.35 24.3w 13UB17 568 C~2NKY
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 -0.04 0.00 0.18
2 0.0518 -764.98 0.05 108.65 -0.20
3 0.0545 -814.58 -0.02 114.75 -0.00
4 0.0547 -816.74 -0.01 115.12 0.09
5 0.1530 -2959.98 -0.03 335.15 -0.02
6 0.1532 -2964.20 0.01 335.69 0.09
7 0.1532 -2964.87 -0.02 335.63 -0.04
8 0.1532 -2965.10 0.08 335.63 -0.08
9 0.1615 -3164.09 -0.18 355.10 -0.09
10 0.2210 -4527.77 0.01 496.69 0.12
11 0.2211 -4530.32 0.03 496.92 0.05
12 0.2212 -4532.87 0.03 497.22 0.05
13 0.2238 -4587.90 -0.08 503.30 -0.08
14 0.2241 -4595.07 -0.12 504.37 0.14
15 0.2351 -4822.92 0.02 530.80 -0.06
16 0.3004 -5920.21 0.05 691.13 -0.01
17 0.3141 -6081.29 0.04 725.26 0.02
18 0.3143 -6082.64 0.11 725.63 0.04
19 0.3195 -6136.44 -0.01 738.48 -0.07
20 0.9503 3908.33 0.05 2187.02 -0.01
21 1.0295 3162.28 0.08 2368.59 -0.01
22 1.0456 2906.99 0.01 2405.54 -0.10
23 1.1988 -447.58 -0.01 2760.25 0.04
24 1.2099 -697.27 0.02 2785.57 0.01
25 1.2723 -1933.55 -0.03 2926.64 -0.09
26 1.2724 -1936.64 0.03 2927.15 -0.02
27 1.2887 -2192.11 -0.02 2963.44 -0.08
28 1.4340 -2663.93 -0.03 3278.49 0.08
29 3.9509 14322.64 -0.03 8959.65 -0.03
30 4.0384 13545.16 -0.04 9220.27 0.01
31 4.0520 13331.44 -0.04 9258.62 0.02
32 4.0521 13329.12 0.08 9259.07 0.04
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.
13UB17 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 63.076 63.123 63.029 ecceobj 0.292 0.293 0.291 incobj 32.769 32.769 32.770 qmin 40.702 42.284 41.573 qmax 85.616 83.759 84.766 amean 62.630 62.630 62.629 amin 61.939 61.948 61.886 amax 63.475 63.439 63.524 emean 0.294 0.258 0.293 emin 0.179 0.160 0.245 emax 0.349 0.323 0.335 imean 32.669 33.506 32.760 imin 31.120 32.050 31.743 imax 35.316 35.499 33.900 excite_mean 0.616 0.612 0.616 fracstop 1.000 1.000 1.000 cjmean 2.799 2.800 2.800 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 254.6 250.4 282.0 kozaiamp 59.2 54.2 180.0