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: 13UL17 # Created Fri Apr 26 01:15:32 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 37 observations of 37 # Arc: 5.11y # First observation: 2013/08/02 # Last observation: 2018/09/12 # Chi-squared of fit: 9.15 DOF: 68 RMS: 0.09 # Min/Max residuals: -0.32 0.19 # Exact a, adot, b, bdot, g, gdot: 1.537766E-05 2.294857E-02 4.030456E-07 2.964372E-04 2.376635E-02 1.117597E-03 # Covariance matrix: 1.6453E-13 -6.3434E-14 6.4380E-16 -3.6093E-16 8.1601E-14 -3.3250E-13 -6.3434E-14 1.8117E-13 -4.7454E-16 1.9685E-15 3.7883E-14 1.6168E-12 6.4380E-16 -4.7454E-16 6.4965E-14 -1.7529E-14 4.3696E-16 -3.9066E-15 -3.6093E-16 1.9685E-15 -1.7529E-14 1.1985E-14 6.2337E-16 1.9021E-14 8.1601E-14 3.7883E-14 4.3696E-16 6.2337E-16 1.0538E-13 4.7397E-13 -3.3250E-13 1.6168E-12 -3.9066E-15 1.9021E-14 4.7397E-13 1.5579E-11 # lat0 lon0 xBary yBary zBary JD0 -1.708726 16.083465 0.928775 -0.012310 -0.413587 2456507.017088 # Heliocentric elements and errors Epoch: 2456506.5000 = 2013/08/02 Mean Anomaly: 73.06423 +/- 0.088 Argument of Peri: 216.61204 +/- 0.098 Long of Asc Node: 82.33211 +/- 0.008 Inclination: 1.83090 +/- 0.000 Eccentricity: 0.02544521 +/- 0.0002 Semi-Major Axis: 42.79213711 +/- 0.0027 Time of Perihelion: 2435755.1339 +/- 25.2 Perihelion: 41.70328217 +/- 0.0079 Aphelion: 43.88099205 +/- 0.0080 Period (y) 279.9330 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 41.06607246 +/- 0.0006 Ecliptic Y 10.87686370 +/- 0.0001 Ecliptic Z -1.25459117 +/- 0.0000 Ecliptic XDOT -0.00061399 +/- 0.0000 Ecliptic YDOT 0.00257528 +/- 0.0000 Ecliptic ZDOT 0.00003044 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.50060157 +/- 0.0005 Geocenter to KBO 42.07629610 +/- 0.0006 # Hcoef: 8.06
The following table shows the complete astrometric record for 13UL17. 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 (13UL17) followed by the observatory code and reference code for the source of the astrometry.
2013 08 02.51631 01 01 54.330 +04 44 56.69 24.4r 13UL17 568 C~2NKZ 2013 08 02.55904 01 01 54.270 +04 44 56.35 24.5r 13UL17 568 C~2NKZ 2013 08 30.43177 01 00 49.522 +04 37 20.43 24.1r 13UL17 568 C~2NKZ 2013 08 31.43593 01 00 46.232 +04 36 58.47 23.0r 13UL17 568 C~2NKZ 2013 09 04.41593 01 00 32.590 +04 35 28.10 25.2r 13UL17 568 C~2NKZ 2013 09 04.45871 01 00 32.440 +04 35 27.06 24.3r 13UL17 568 C~2NKZ 2013 10 06.39713 00 58 20.588 +04 21 25.65 24.3r 13UL17 568 C~2NKZ 2013 10 06.47088 00 58 20.253 +04 21 23.48 24.1r 13UL17 568 C~2NKZ 2013 10 06.47992 00 58 20.210 +04 21 23.20 24.5r 13UL17 568 C~2NKZ 2013 10 31.23884 00 56 32.540 +04 10 28.32 24.2r 13UL17 568 C~2NKZ 2013 10 31.28183 00 56 32.364 +04 10 27.19 24.3r 13UL17 568 C~2NKZ 2013 10 31.32461 00 56 32.189 +04 10 26.28 24.4r 13UL17 568 C~2NKZ 2013 11 01.26510 00 56 28.394 +04 10 03.67 24.1r 13UL17 568 C~2NKZ 2013 11 05.42210 00 56 11.991 +04 08 27.29 24.7r 13UL17 568 C~2NKZ 2013 11 29.22781 00 54 55.986 +04 01 18.44 24.5r 13UL17 568 C~2NKZ 2013 11 29.23812 00 54 55.962 +04 01 18.34 24.6r 13UL17 568 C~2NKZ 2013 11 29.30546 00 54 55.773 +04 01 17.40 24.3r 13UL17 568 C~2NKZ 2013 12 04.25494 00 54 44.786 +04 00 20.72 24.4r 13UL17 568 C~2NKZ 2013 12 04.30703 00 54 44.673 +04 00 19.87 24.4r 13UL17 568 C~2NKZ 2013 12 05.25309 00 54 42.801 +04 00 10.66 23.9r 13UL17 568 C~2NKZ 2014 06 27.58615 01 06 32.369 +05 16 09.71 24.6r 13UL17 568 C~2NKZ 2014 06 28.59119 01 06 34.230 +05 16 18.84 24.4r 13UL17 568 C~2NKZ 2014 07 24.54916 01 06 52.401 +05 17 08.70 24.8r 13UL17 568 C~2NKZ 2014 07 27.57991 01 06 50.791 +05 16 51.55 24.7r 13UL17 568 C~2NKZ 2014 11 24.27889 01 00 01.652 +04 33 59.58 24.8r 13UL17 568 C~2NKZ 2014 12 17.27056 00 59 15.273 +04 30 08.31 23.9r 13UL17 568 C~2NKZ 2015 01 17.27935 00 59 24.982 +04 32 36.34 24.4r 13UL17 568 C~2NKZ 2015 08 20.52313 01 11 04.677 +05 43 10.07 24.1r 13UL17 568 C~2NKZ 2015 12 07.37370 01 04 21.291 +05 02 27.54 23.5w 13UL17 568 C~2NKZ 2017 07 24.60098 01 21 20.081 +06 48 41.72 24.5w 13UL17 568 C~2NKZ 2017 08 25.51775 01 20 35.120 +06 43 06.83 24.6w 13UL17 568 C~2NKZ 2017 08 30.45989 01 20 21.276 +06 41 35.70 24.6w 13UL17 568 C~2NKZ 2018 09 09.39841 01 24 43.443 +07 08 48.77 13UL17 568 C~2kPT 2018 09 09.61045 01 24 42.698 +07 08 44.15 13UL17 568 C~2kPT 2018 09 11.43066 01 24 36.285 +07 08 03.69 13UL17 568 C~2kPT 2018 09 12.62030 01 24 31.974 +07 07 36.86 13UL17 568 C~2kPT 2018 09 12.62868 01 24 31.945 +07 07 36.47 13UL17 568 C~2kPT
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 -0.00 0.00 -0.05
2 0.0001 0.00 -0.04 0.00 0.05
3 0.0764 0.00 -0.19 0.00 0.04
4 0.0792 0.00 -0.03 0.00 0.10
5 0.0901 0.00 -0.14 0.00 0.09
6 0.0902 0.00 -0.08 0.00 0.05
7 0.1776 0.00 0.06 0.00 0.14
8 0.1778 0.00 0.07 0.00 0.02
9 0.1779 0.00 0.04 0.00 -0.01
10 0.2456 0.00 -0.05 0.00 -0.03
11 0.2458 0.00 -0.02 0.00 -0.12
12 0.2459 0.00 0.01 0.00 -0.00
13 0.2485 0.00 0.07 0.00 -0.07
14 0.2598 0.00 0.08 0.00 0.09
15 0.3250 0.00 0.11 0.00 0.03
16 0.3250 0.00 0.14 0.00 0.06
17 0.3252 0.00 -0.18 0.00 -0.02
18 0.3388 0.00 -0.02 0.00 0.08
19 0.3389 0.00 -0.06 0.00 -0.24
20 0.3415 0.00 0.00 0.00 -0.06
21 0.9009 0.00 -0.07 0.00 -0.00
22 0.9037 0.00 0.13 0.00 0.09
23 0.9748 0.00 0.03 0.00 0.04
24 0.9831 0.00 0.19 0.00 -0.04
25 1.3108 0.00 0.13 0.00 -0.32
26 1.3737 0.00 0.05 0.00 -0.03
27 1.4586 0.00 -0.06 0.00 0.03
28 2.0479 0.00 -0.08 0.00 0.04
29 2.3459 0.00 0.00 0.00 -0.00
30 3.9756 0.00 -0.09 0.00 -0.04
31 4.0630 0.00 -0.00 0.00 -0.02
32 4.0765 0.00 -0.03 0.00 0.04
33 5.1030 0.00 -0.10 0.00 0.01
34 5.1036 0.00 0.03 0.00 0.04
35 5.1086 0.00 0.05 0.00 0.01
36 5.1119 0.00 0.04 0.00 0.11
37 5.1119 0.00 0.07 0.00 -0.08
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.
13UL17 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.019 43.019 43.019 ecceobj 0.029 0.030 0.029 incobj 1.831 1.831 1.831 qmin 40.873 40.874 40.867 qmax 44.812 44.810 44.814 amean 42.767 42.767 42.767 amin 42.446 42.446 42.449 amax 43.096 43.096 43.096 emean 0.024 0.024 0.024 emin 0.000 0.000 0.000 emax 0.040 0.040 0.040 imean 1.072 1.072 1.072 imin 0.647 0.646 0.647 imax 1.405 1.405 1.405 excite_mean 0.031 0.031 0.031 fracstop 1.000 1.000 1.000 cjmean 3.086 3.086 3.086 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 177.9 178.0 177.8 kozaiamp 179.9 179.9 180.0