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: 13UB18 # Created Sun Nov 24 02:09:45 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 36 observations of 36 # Arc: 10.21y # First observation: 2013/08/02 # Last observation: 2023/10/19 # Chi-squared of fit: 13.59 DOF: 66 RMS: 0.11 # Min/Max residuals: -0.31 0.30 # Exact a, adot, b, bdot, g, gdot: 1.496194E-05 2.206456E-02 -7.068745E-10 -6.210332E-04 2.296575E-02 4.752914E-05 # Covariance matrix: 1.4397E-13 -1.0516E-14 1.2594E-15 3.7239E-16 9.1798E-14 -3.6878E-14 -1.0516E-14 6.5192E-14 1.6718E-15 -2.1326E-15 3.7619E-14 3.2482E-13 1.2594E-15 1.6718E-15 5.8555E-14 -7.8939E-15 2.4736E-15 8.4185E-15 3.7239E-16 -2.1326E-15 -7.8939E-15 3.3807E-15 -9.8969E-16 -1.1268E-14 9.1798E-14 3.7619E-14 2.4736E-15 -9.8969E-16 1.2511E-13 1.7246E-13 -3.6878E-14 3.2482E-13 8.4185E-15 -1.1268E-14 1.7246E-13 1.7110E-12 # lat0 lon0 xBary yBary zBary JD0 -3.165932 17.862705 0.941043 -0.021235 -0.384454 2456507.036518 # Heliocentric elements and errors Epoch: 2456506.5000 = 2013/08/02 Mean Anomaly: 324.70066 +/- 0.086 Argument of Peri: 279.59602 +/- 0.093 Long of Asc Node: 134.87202 +/- 0.002 Inclination: 3.56005 +/- 0.000 Eccentricity: 0.03618288 +/- 0.0000 Semi-Major Axis: 45.25400323 +/- 0.0026 Time of Perihelion: 2467409.5513 +/- 27.9 Perihelion: 43.61658305 +/- 0.0033 Aphelion: 46.89142341 +/- 0.0034 Period (y) 304.4344 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 42.03570276 +/- 0.0006 Ecliptic Y 12.56145827 +/- 0.0002 Ecliptic Z -2.40474919 +/- 0.0000 Ecliptic XDOT -0.00081158 +/- 0.0000 Ecliptic YDOT 0.00250327 +/- 0.0000 Ecliptic ZDOT -0.00007410 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.93830457 +/- 0.0006 Geocenter to KBO 43.54312728 +/- 0.0007 # Hcoef: 7.66
The following table shows the complete astrometric record for 13UB18. 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 (13UB18) followed by the observatory code and reference code for the source of the astrometry.
2013 08 02.53574 01 10 43.692 +04 04 49.45 23.8r 13UB18 568 C~2NKc 2013 08 02.57845 01 10 43.641 +04 04 49.00 23.9r 13UB18 568 C~2NKc 2013 08 30.45291 01 09 45.861 +03 56 55.78 24.1r 13UB18 568 C~2NKc 2013 08 30.45765 01 09 45.846 +03 56 55.50 24.0r 13UB18 568 C~2NKc 2013 08 31.45558 01 09 42.795 +03 56 33.19 24.0r 13UB18 568 C~2NKc 2013 08 31.52122 01 09 42.604 +03 56 32.01 24.2r 13UB18 568 C~2NKc 2013 09 04.43540 01 09 30.143 +03 55 02.33 24.1r 13UB18 568 C~2NKc 2013 09 04.51028 01 09 29.901 +03 55 00.77 23.8r 13UB18 568 C~2NKc 2013 10 06.41689 01 07 24.884 +03 41 07.28 24.0r 13UB18 568 C~2NKc 2013 10 31.25837 01 05 39.635 +03 30 27.46 23.6r 13UB18 568 C~2NKc 2013 10 31.30132 01 05 39.475 +03 30 26.40 24.0r 13UB18 568 C~2NKc 2013 10 31.34404 01 05 39.299 +03 30 25.52 24.2r 13UB18 568 C~2NKc 2013 11 01.28510 01 05 35.548 +03 30 03.60 24.2r 13UB18 568 C~2NKc 2013 11 01.41360 01 05 35.031 +03 30 00.60 24.5r 13UB18 568 C~2NKc 2013 11 05.46270 01 05 19.226 +03 28 29.98 24.0r 13UB18 568 C~2NKc 2013 12 04.27516 01 03 50.964 +03 20 46.68 24.3r 13UB18 568 C~2NKc 2013 12 04.32732 01 03 50.830 +03 20 46.13 24.1r 13UB18 568 C~2NKc 2013 12 06.22106 01 03 46.948 +03 20 29.36 24.0r 13UB18 568 C~2NKc 2014 06 27.60559 01 15 08.808 +04 32 37.21 24.2r 13UB18 568 C~2NKc 2014 06 28.61065 01 15 10.798 +04 32 44.34 24.2r 13UB18 568 C~2NKc 2014 08 22.55650 01 14 54.959 +04 26 40.93 24.1r 13UB18 568 C~2NKc 2014 08 28.41844 01 14 39.653 +04 24 44.77 24.0r 13UB18 568 C~2NKc 2014 10 23.36404 01 11 01.454 +04 00 57.86 22.6r 13UB18 568 C~2NKc 2014 10 27.40273 01 10 44.452 +03 59 17.24 24.1r 13UB18 568 C~2NKc 2014 11 24.28276 01 09 02.858 +03 49 53.87 24.0r 13UB18 568 C~2NKc 2014 11 25.30908 01 08 59.869 +03 49 38.70 24.9r 13UB18 568 C~2NKc 2014 12 17.24304 01 08 14.042 +03 46 20.19 24.3r 13UB18 568 C~2NKc 2015 01 17.26915 01 08 17.194 +03 48 59.00 23.8r 13UB18 568 C~2NKc 2019 10 26.236660 01 34 58.635 +06 14 12.84 24.1G 13UB18 G37 C~3clS 2019 10 26.328250 01 34 58.217 +06 14 10.54 13UB18 G37 C~3clS 2021 12 01.074370 01 42 21.652 +06 54 45.63 24.2G 13UB18 G37 C~5J5W 2021 12 01.126210 01 42 21.476 +06 54 45.01 13UB18 G37 C~5J5W 2021 12 01.177910 01 42 21.339 +06 54 44.07 13UB18 G37 C~5J5W 2023 10 19.174010 01 55 05.660 +08 02 27.34 23.6G 13UB18 G37 C~7Mj5 2023 10 19.234950 01 55 05.383 +08 02 25.52 13UB18 G37 C~7Mj5 2023 10 19.305750 01 55 05.067 +08 02 23.87 13UB18 G37 C~7Mj5
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 0.08 0.00 -0.06
2 0.0001 0.00 0.03 0.00 -0.04
3 0.0764 0.00 0.18 0.00 0.05
4 0.0764 0.00 0.17 0.00 -0.13
5 0.0792 0.00 -0.13 0.00 -0.31
6 0.0794 0.00 0.10 0.00 -0.03
7 0.0901 0.00 -0.14 0.00 -0.09
8 0.0903 0.00 0.01 0.00 0.11
9 0.1776 0.00 -0.12 0.00 0.01
10 0.2456 0.00 -0.20 0.00 0.05
11 0.2458 0.00 0.03 0.00 -0.01
12 0.2459 0.00 0.00 0.00 0.11
13 0.2485 0.00 0.01 0.00 -0.02
14 0.2488 0.00 0.06 0.00 -0.06
15 0.2599 0.00 -0.14 0.00 -0.03
16 0.3388 0.00 0.12 0.00 0.08
17 0.3389 0.00 -0.15 0.00 0.02
18 0.3441 0.00 0.12 0.00 0.30
19 0.9009 0.00 -0.01 0.00 0.08
20 0.9037 0.00 -0.01 0.00 0.06
21 1.0541 0.00 0.11 0.00 -0.13
22 1.0702 0.00 0.06 0.00 0.04
23 1.2233 0.00 -0.12 0.00 -0.06
24 1.2344 0.00 -0.04 0.00 -0.00
25 1.3107 0.00 -0.09 0.00 0.02
26 1.3135 0.00 -0.15 0.00 -0.10
27 1.3736 0.00 0.21 0.00 0.09
28 1.4585 0.00 0.02 0.00 0.08
29 6.2305 0.00 0.07 0.00 -0.01
30 6.2308 0.00 -0.12 0.00 -0.03
31 8.3300 0.00 0.00 0.00 -0.01
32 8.3302 0.00 -0.17 0.00 0.12
33 8.3303 0.00 0.23 0.00 -0.08
34 10.2112 0.00 0.01 0.00 0.15
35 10.2114 0.00 -0.05 0.00 -0.15
36 10.2116 0.00 -0.02 0.00 -0.03
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.
13UB18 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 45.501 45.501 45.501 ecceobj 0.039 0.039 0.039 incobj 3.556 3.556 3.556 qmin 42.710 42.692 42.717 qmax 47.929 47.936 47.923 amean 45.206 45.206 45.206 amin 44.849 44.855 44.850 amax 45.571 45.578 45.568 emean 0.039 0.039 0.039 emin 0.025 0.025 0.025 emax 0.052 0.052 0.052 imean 2.590 2.590 2.590 imin 2.132 2.132 2.132 imax 3.041 3.042 3.040 excite_mean 0.060 0.060 0.060 fracstop 1.000 1.000 1.000 cjmean 3.112 3.112 3.112 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 182.8 182.8 182.7 kozaiamp 180.0 180.0 180.0