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: 13UW17 # Created Mon Apr 28 01:09:52 2025 # Orbit generated from Bernstein formalism # Fitting 53 observations of 53 # Arc: 4.08y # First observation: 2013/08/02 # Last observation: 2017/08/30 Preliminary a, adot, b, bdot, g, gdot: -0.000136 0.020471 -0.000002 0.000158 0.022060 0.000000 # Chi-squared of fit: 23.63 DOF: 100 RMS: 0.12 # Min/Max residuals: -0.45 0.31 # Exact a, adot, b, bdot, g, gdot: 1.376526E-05 2.029636E-02 8.392324E-07 1.571725E-04 2.199625E-02 2.802573E-04 # Covariance matrix: 1.2478E-13 -4.4523E-14 8.3124E-16 -1.3314E-16 6.2438E-14 -1.7982E-13 -4.4523E-14 1.1936E-13 2.0900E-16 5.1847E-16 5.4795E-14 1.4171E-12 8.3124E-16 2.0900E-16 5.7371E-14 -2.7473E-14 1.0989E-15 4.1762E-15 -1.3314E-16 5.1847E-16 -2.7473E-14 2.5111E-14 2.5719E-16 7.7487E-15 6.2438E-14 5.4795E-14 1.0989E-15 2.5719E-16 1.1323E-13 9.0994E-13 -1.7982E-13 1.4171E-12 4.1762E-15 7.7487E-15 9.0994E-13 2.1397E-11 # lat0 lon0 xBary yBary zBary JD0 -1.900687 17.563402 0.939072 -0.012900 -0.389615 2456507.028758 # Heliocentric elements and errors Epoch: 2456500.5000 = 2013/07/27 Mean Anomaly: 223.13490 +/- 0.691 Argument of Peri: 59.95900 +/- 0.690 Long of Asc Node: 94.30678 +/- 0.013 Inclination: 1.92669 +/- 0.000 Eccentricity: 0.01336746 +/- 0.0002 Semi-Major Axis: 45.41554848 +/- 0.0024 Time of Perihelion: 2499001.1415 +/- 214.4 Perihelion: 44.80845801 +/- 0.0078 Aphelion: 46.02263895 +/- 0.0078 Period (y) 306.0660 +/- 0.02 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 43.97394254 +/- 0.0007 Ecliptic Y 12.93664059 +/- 0.0002 Ecliptic Z -1.50777487 +/- 0.0000 Ecliptic XDOT -0.00073470 +/- 0.0000 Ecliptic YDOT 0.00241839 +/- 0.0000 Ecliptic ZDOT 0.00001854 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 45.86215953 +/- 0.0006 Geocenter to KBO 45.46228499 +/- 0.0007 # Hcoef: 7.62
The following table shows the complete astrometric record for 13UW17. 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 (13UW17) followed by the observatory code and reference code for the source of the astrometry.
2013 08 02.52798 01 07 41.289 +05 08 13.16 24.0r 13UW17 568 C~2NKb 2013 08 02.57069 01 07 41.226 +05 08 12.85 24.0r 13UW17 568 C~2NKb 2013 08 30.44360 01 06 43.203 +05 01 16.76 24.0r 13UW17 568 C~2NKb 2013 08 31.44775 01 06 40.204 +05 00 56.45 24.0r 13UW17 568 C~2NKb 2013 08 31.49065 01 06 40.037 +05 00 55.75 24.0r 13UW17 568 C~2NKb 2013 08 31.50871 01 06 40.020 +05 00 55.40 26.7r 13UW17 568 C~2NKb 2013 09 04.42758 01 06 27.773 +04 59 33.43 24.0r 13UW17 568 C~2NKb 2013 09 04.50244 01 06 27.509 +04 59 31.93 23.9r 13UW17 568 C~2NKb 2013 10 06.40889 01 04 25.754 +04 46 34.46 23.8r 13UW17 568 C~2NKb 2013 10 06.49158 01 04 25.382 +04 46 32.35 24.0r 13UW17 568 C~2NKb 2013 10 06.49617 01 04 25.389 +04 46 32.12 23.9r 13UW17 568 C~2NKb 2013 10 31.25056 01 02 44.184 +04 36 19.82 24.4r 13UW17 568 C~2NKb 2013 10 31.29356 01 02 44.027 +04 36 18.82 24.3r 13UW17 568 C~2NKb 2013 10 31.33628 01 02 43.859 +04 36 17.98 24.1r 13UW17 568 C~2NKb 2013 11 01.27683 01 02 40.259 +04 35 56.50 23.8r 13UW17 568 C~2NKb 2013 11 01.40318 01 02 39.772 +04 35 53.79 24.5r 13UW17 568 C~2NKb 2013 11 05.45493 01 02 24.575 +04 34 25.02 24.2r 13UW17 568 C~2NKb 2013 11 29.31710 01 01 11.023 +04 27 33.32 24.4r 13UW17 568 C~2NKb 2013 12 04.26738 01 01 00.065 +04 26 37.81 24.4r 13UW17 568 C~2NKb 2013 12 04.31956 01 00 59.969 +04 26 37.02 24.1r 13UW17 568 C~2NKb 2014 06 27.59782 01 11 44.897 +05 35 15.33 24.0r 13UW17 568 C~2NKb 2014 06 28.60286 01 11 46.695 +05 35 23.63 24.3r 13UW17 568 C~2NKb 2014 07 24.56087 01 12 05.726 +05 36 13.19 24.2r 13UW17 568 C~2NKb 2014 07 27.59171 01 12 04.452 +05 35 58.06 24.1r 13UW17 568 C~2NKb 2014 08 22.56426 01 11 25.368 +05 30 59.50 25.2r 13UW17 568 C~2NKb 2014 08 28.42620 01 11 10.124 +05 29 15.39 23.9r 13UW17 568 C~2NKb 2014 08 29.52684 01 11 07.030 +05 28 54.39 24.0r 13UW17 568 C~2NKb 2014 08 29.61463 01 11 06.770 +05 28 52.74 24.1r 13UW17 568 C~2NKb 2014 10 23.28255 01 07 38.089 +05 07 00.98 24.0r 13UW17 568 C~2NKb 2014 10 23.33619 01 07 37.865 +05 06 59.64 24.0r 13UW17 568 C~2NKb 2014 10 23.36016 01 07 37.781 +05 06 59.23 23.9r 13UW17 568 C~2NKb 2014 10 23.38966 01 07 37.639 +05 06 58.33 23.9r 13UW17 568 C~2NKb 2014 10 23.39470 01 07 37.622 +05 06 58.22 23.9r 13UW17 568 C~2NKb 2014 10 25.25994 01 07 30.032 +05 06 13.00 24.2r 13UW17 568 C~2NKb 2014 10 25.36233 01 07 29.610 +05 06 10.22 24.8r 13UW17 568 C~2NKb 2014 10 25.46195 01 07 29.198 +05 06 08.18 23.9r 13UW17 568 C~2NKb 2014 10 27.24998 01 07 22.006 +05 05 25.36 23.9r 13UW17 568 C~2NKb 2014 10 27.30820 01 07 21.767 +05 05 24.02 24.1r 13UW17 568 C~2NKb 2014 10 27.37469 01 07 21.497 +05 05 22.30 23.9r 13UW17 568 C~2NKb 2014 10 27.39884 01 07 21.395 +05 05 21.90 24.2r 13UW17 568 C~2NKb 2014 10 29.26294 01 07 13.977 +05 04 37.82 24.0r 13UW17 568 C~2NKb 2014 11 24.24000 01 05 44.181 +04 56 06.03 25.1r 13UW17 568 C~2NKb 2014 12 17.25485 01 04 57.764 +04 52 15.75 24.6r 13UW17 568 C~2NKb 2014 12 17.25877 01 04 57.748 +04 52 15.99 24.2r 13UW17 568 C~2NKb 2015 01 17.23854 01 05 01.791 +04 54 08.74 24.6r 13UW17 568 C~2NKb 2015 08 20.51066 01 15 50.627 +05 58 37.99 24.2r 13UW17 568 C~2NKb 2015 10 15.30155 01 12 33.893 +05 37 45.99 23.8r 13UW17 568 C~2NKb 2015 10 15.30564 01 12 33.872 +05 37 45.85 23.7r 13UW17 568 C~2NKb 2015 12 07.37779 01 09 32.122 +05 20 33.38 24.4w 13UW17 568 C~2NKb 2017 07 24.60098 01 24 59.181 +06 56 01.30 24.4w 13UW17 568 C~2NKb 2017 08 25.51775 01 24 18.784 +06 50 48.28 24.2w 13UW17 568 C~2NKb 2017 08 30.45989 01 24 06.077 +06 49 23.24 24.6w 13UW17 568 C~2NKb 2017 08 30.50665 01 24 05.953 +06 49 22.32 24.1w 13UW17 568 C~2NKb
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 0.17 0.00 -0.15
2 0.0001 -0.99 0.02 0.07 -0.00
3 0.0764 -961.06 -0.12 -54.40 0.09
4 0.0792 -1010.23 -0.04 -56.10 -0.04
5 0.0793 -1012.81 -0.45 -55.80 0.31
6 0.0793 -1013.18 0.09 -56.02 0.10
7 0.0901 -1213.61 0.19 -62.05 -0.12
8 0.0903 -1217.83 -0.00 -61.93 0.07
9 0.1776 -3196.75 0.08 -86.28 0.02
10 0.1779 -3202.69 -0.20 -86.11 0.17
11 0.1779 -3202.69 0.12 -86.36 -0.09
12 0.2456 -4835.46 -0.12 -73.94 0.09
13 0.2458 -4838.01 0.03 -73.97 0.00
14 0.2459 -4840.66 0.08 -73.79 0.12
15 0.2485 -4898.64 0.07 -73.05 -0.13
16 0.2488 -4906.41 0.19 -72.76 -0.04
17 0.2599 -5150.45 0.06 -67.86 0.02
18 0.3252 -6325.04 -0.14 -27.22 -0.35
19 0.3388 -6497.85 -0.10 -15.73 0.30
20 0.3389 -6499.48 -0.00 -15.91 -0.02
21 0.9009 3982.13 0.06 117.98 0.06
22 0.9037 4010.13 0.02 115.48 -0.10
23 0.9748 4291.92 0.08 53.60 -0.07
24 0.9831 4268.58 -0.05 46.81 0.22
25 1.0542 3615.20 0.01 -8.17 -0.04
26 1.0702 3365.04 -0.04 -18.14 0.18
27 1.0732 3314.31 0.01 -20.04 0.02
28 1.0735 3310.09 -0.02 -20.09 0.07
29 1.2231 -71.69 -0.06 -48.54 -0.05
30 1.2233 -75.30 -0.08 -48.50 -0.07
31 1.2234 -76.61 0.20 -48.40 0.00
32 1.2234 -78.92 -0.13 -48.43 -0.06
33 1.2235 -79.19 -0.07 -48.43 -0.07
34 1.2286 -201.27 -0.02 -47.06 -0.01
35 1.2288 -208.16 -0.13 -47.23 -0.31
36 1.2291 -214.62 -0.00 -46.78 0.03
37 1.2340 -330.29 0.04 -45.44 -0.02
38 1.2342 -334.10 0.03 -45.32 0.02
39 1.2344 -338.48 -0.00 -45.38 -0.12
40 1.2344 -340.05 0.02 -45.17 0.06
41 1.2395 -459.31 -0.02 -43.71 -0.12
42 1.3106 -1894.95 0.30 -5.37 -0.10
43 1.3737 -2624.12 0.06 46.49 -0.24
44 1.3737 -2624.25 0.00 46.80 0.07
45 1.4585 -2525.35 -0.06 127.96 0.00
46 2.0479 7910.78 -0.01 28.60 0.04
47 2.2006 4716.40 0.01 -19.90 0.02
48 2.2006 4716.06 -0.05 -19.91 0.01
49 2.3459 1812.71 -0.04 54.75 0.05
50 3.9756 16814.71 0.08 149.76 0.04
51 4.0629 16135.44 -0.01 83.91 0.15
52 4.0765 15926.87 -0.06 75.75 0.03
53 4.0766 15924.80 0.00 75.59 -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.
13UW17 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 45.657 45.664 45.650 ecceobj 0.008 0.008 0.008 incobj 1.927 1.927 1.927 qmin 43.934 43.939 43.909 qmax 46.998 46.968 46.986 amean 45.378 45.385 45.370 amin 45.022 45.040 45.022 amax 45.729 45.742 45.732 emean 0.015 0.015 0.015 emin 0.001 0.001 0.002 emax 0.028 0.028 0.028 imean 0.424 0.423 0.424 imin 0.137 0.136 0.137 imax 0.665 0.664 0.665 excite_mean 0.017 0.017 0.017 fracstop 1.000 1.000 1.000 cjmean 3.118 3.118 3.118 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 170.5 170.3 170.6 kozaiamp 180.0 180.0 179.9