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: 13UW16 # Created Tue Apr 1 01:09:50 2025 # Orbit generated from Bernstein formalism # Fitting 56 observations of 57 # Arc: 3.98y # First observation: 2013/08/02 # Last observation: 2017/07/24 Preliminary a, adot, b, bdot, g, gdot: -0.000045 0.020770 0.000001 0.000314 0.022479 0.000000 # Chi-squared of fit: 16.86 DOF: 106 RMS: 0.10 # Min/Max residuals: -0.30 0.29 # Exact a, adot, b, bdot, g, gdot: 1.465295E-05 2.071824E-02 1.249613E-07 3.175131E-04 2.237240E-02 -1.054449E-03 # Covariance matrix: 1.1052E-13 -2.0303E-14 9.4210E-16 -4.6396E-16 6.8829E-14 3.2341E-14 -2.0303E-14 1.0677E-13 -2.6591E-16 1.6434E-15 4.7071E-14 1.4971E-12 9.4210E-16 -2.6591E-16 4.6445E-14 -2.7611E-14 7.9931E-16 -7.6103E-15 -4.6396E-16 1.6434E-15 -2.7611E-14 3.7075E-14 4.6757E-16 3.6525E-14 6.8829E-14 4.7071E-14 7.9931E-16 4.6757E-16 9.6263E-14 8.8512E-13 3.2341E-14 1.4971E-12 -7.6103E-15 3.6525E-14 8.8512E-13 3.2382E-11 # lat0 lon0 xBary yBary zBary JD0 -1.800488 14.604255 0.917873 -0.013716 -0.437214 2456507.005448 # Heliocentric elements and errors Epoch: 2456500.5000 = 2013/07/27 Mean Anomaly: 262.15713 +/- 0.060 Argument of Peri: 41.49720 +/- 0.055 Long of Asc Node: 78.14312 +/- 0.014 Inclination: 1.97156 +/- 0.000 Eccentricity: 0.07511290 +/- 0.0003 Semi-Major Axis: 44.44911282 +/- 0.0025 Time of Perihelion: 2485918.9472 +/- 17.9 Perihelion: 41.11041098 +/- 0.0119 Aphelion: 47.78781465 +/- 0.0120 Period (y) 296.3486 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 43.88692129 +/- 0.0006 Ecliptic Y 10.48984741 +/- 0.0001 Ecliptic Z -1.40432690 +/- 0.0000 Ecliptic XDOT -0.00076914 +/- 0.0000 Ecliptic YDOT 0.00242047 +/- 0.0000 Ecliptic ZDOT 0.00004303 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 45.14499854 +/- 0.0006 Geocenter to KBO 44.69793402 +/- 0.0006 # Hcoef: 7.22
The following table shows the complete astrometric record for 13UW16. 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 (13UW16) followed by the observatory code and reference code for the source of the astrometry.
2013 08 02.50467 00 56 34.318 +04 05 43.96 23.8r 13UW16 568 C~2NKW 2013 08 02.54741 00 56 34.253 +04 05 43.47 23.8r 13UW16 568 C~2NKW 2013 08 11.50367 00 56 19.255 +04 03 50.76 23.9r 13UW16 568 C~2NKW 2013 08 30.42008 00 55 29.956 +03 58 09.06 23.7r 13UW16 568 C~2NKW 2013 08 31.42413 00 55 26.746 +03 57 47.52 23.7r 13UW16 568 C~2NKW 2013 08 31.46730 00 55 26.603 +03 57 46.55 23.9r 13UW16 568 C~2NKW 2013 09 04.40430 00 55 13.552 +03 56 19.25 23.1r 13UW16 568 C~2NKW 2013 09 04.44707 00 55 13.386 +03 56 18.43 23.6r 13UW16 568 C~2NKW 2013 10 05.37122 00 53 11.725 +03 43 17.14 23.8r 13UW16 568 C~2NKW 2013 10 05.37632 00 53 11.690 +03 43 17.13 23.9r 13UW16 568 C~2NKW 2013 10 06.37972 00 53 07.449 +03 42 50.55 23.5r 13UW16 568 C~2NKW 2013 10 06.44410 00 53 07.184 +03 42 48.90 23.6r 13UW16 568 C~2NKW 2013 10 09.50414 00 52 54.218 +03 41 28.26 23.9r 13UW16 568 C~2NKW 2013 10 09.50879 00 52 54.205 +03 41 28.39 23.6r 13UW16 568 C~2NKW 2013 10 29.29940 00 51 33.154 +03 33 14.25 24.0r 13UW16 568 C~2NKW 2013 10 31.22708 00 51 25.738 +03 32 30.36 24.1r 13UW16 568 C~2NKW 2013 10 31.27019 00 51 25.589 +03 32 29.24 23.6r 13UW16 568 C~2NKW 2013 10 31.31297 00 51 25.422 +03 32 28.35 23.6r 13UW16 568 C~2NKW 2013 11 01.25343 00 51 21.875 +03 32 07.36 23.8r 13UW16 568 C~2NKW 2013 11 01.37273 00 51 21.414 +03 32 04.61 23.9r 13UW16 568 C~2NKW 2013 11 02.22554 00 51 18.266 +03 31 45.74 23.9r 13UW16 568 C~2NKW 2013 11 02.24797 00 51 18.137 +03 31 45.13 23.9r 13UW16 568 C~2NKW 2013 11 02.26953 00 51 18.070 +03 31 44.82 24.3r 13UW16 568 C~2NKW 2013 11 02.29201 00 51 17.968 +03 31 44.25 23.9r 13UW16 568 C~2NKW 2013 11 05.35173 00 51 06.758 +03 30 38.06 23.5r 13UW16 568 C~2NKW 2013 11 05.37780 00 51 06.669 +03 30 37.67 24.0r 13UW16 568 C~2NKW 2013 11 06.39952 00 51 03.023 +03 30 16.22 23.9r 13UW16 568 C~2NKW 2013 11 06.40464 00 51 02.993 +03 30 16.33 23.8r 13UW16 568 C~2NKW 2013 11 07.43574 00 50 59.359 +03 29 55.03 23.5r 13UW16 568 C~2NKW 2013 11 29.21607 00 49 56.184 +03 24 01.81 23.7r 13UW16 568 C~2NKW 2013 12 04.24324 00 49 45.994 +03 23 10.07 23.7r 13UW16 568 C~2NKW 2013 12 04.29069 00 49 45.902 +03 23 09.59 24.0r 13UW16 568 C~2NKW 2013 12 05.31529 00 49 44.056 +03 23 00.41 23.6r 13UW16 568 C~2NKW 2014 06 27.57448 01 00 50.187 +04 34 57.28 23.9r 13UW16 568 C~2NKW 2014 06 28.57952 01 00 51.773 +04 35 04.81 23.9r 13UW16 568 C~2NKW 2014 07 23.55193 01 01 05.310 +04 35 30.19 23.8r 13UW16 568 C~2NKW 2014 07 27.53111 01 01 02.856 +04 35 05.43 23.4r 13UW16 568 C~2NKW 2014 08 22.61348 01 00 17.389 +04 29 29.60 23.7r 13UW16 568 C~2NKX 2014 08 23.47191 01 00 15.108 +04 29 14.09 25.5u 13UW16 568 C~2NKX 2014 08 28.45040 01 00 00.937 +04 27 37.75 23.7r 13UW16 568 C~2NKX 2014 10 23.27749 00 56 22.619 +04 04 35.37 23.7r 13UW16 568 C~2NKX 2014 10 23.33112 00 56 22.393 +04 04 33.88 23.7r 13UW16 568 C~2NKX 2014 10 23.38450 00 56 22.158 +04 04 32.87 23.7r 13UW16 568 C~2NKX 2014 10 25.25487 00 56 14.589 +04 03 47.07 23.7r 13UW16 568 C~2NKX 2014 10 25.35645 00 56 14.156 +04 03 44.55 23.8r 13UW16 568 C~2NKX 2014 10 25.45680 00 56 13.738 +04 03 42.14 23.3r 13UW16 568 C~2NKX 2014 10 27.24490 00 56 06.590 +04 02 59.20 23.6r 13UW16 568 C~2NKX 2014 10 27.30309 00 56 06.346 +04 02 57.80 23.7r 13UW16 568 C~2NKX 2014 10 27.36937 00 56 06.077 +04 02 56.22 23.6r 13UW16 568 C~2NKX 2014 10 29.25791 00 55 58.613 +04 02 11.60 23.7r 13UW16 568 C~2NKX 2014 11 19.20738 00 54 45.397 +03 55 07.49 23.1r 13UW16 568 C~2NKX 2014 11 25.22391 00 54 28.660 +03 53 35.45 23.7r 13UW16 568 C~2NKX 2014 12 17.32324 00 53 49.178 +03 50 24.11 23.7r 13UW16 568 C~2NKX 2015 01 17.26407 00 54 01.211 +03 53 06.71 23.9r 13UW16 568 C~2NKX 2017 01 31.21678 01 03 09.260 +04 53 07.77 24.0w 13UW16 568 C~2NKX 2017 01 31.22433 01 03 09.275 +04 53 07.94 23.7w 13UW16 568 C~2NKX 2017 07 24.59111 01 14 13.622 +06 00 09.23 23.8w 13UW16 568 C~2NKX
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 0.02
2 0.0001 -1.09 -0.08 -0.08 0.01
3 0.0246 -251.60 -0.10 -17.45 0.06
4 0.0764 -1064.01 0.06 -47.84 0.01
5 0.0792 -1116.64 -0.02 -49.16 0.00
6 0.0793 -1118.98 -0.05 -49.22 -0.03
7 0.0901 -1332.85 0.10 -54.31 -0.30
8 0.0902 -1335.46 -0.08 -54.11 -0.06
9 0.1749 -3317.04 0.06 -70.79 -0.12
10 0.1749 -3317.53 -0.07 -70.60 0.07
11 0.1776 -3386.37 -0.05 -70.55 -0.03
12 0.1778 -3390.66 0.15 -70.54 -0.05
13 0.1862 -3600.89 -0.07 -69.81 -0.06
14 0.1862 -3601.02 0.12 -69.62 0.13
15 0.2404 -4911.61 0.16 -55.57 -0.11
16 0.2456 -5031.04 -0.16 -53.04 0.16
17 0.2458 -5033.53 0.02 -53.21 -0.08
18 0.2459 -5036.18 0.03 -53.06 -0.00
19 0.2485 -5093.30 0.14 -51.84 0.06
20 0.2488 -5100.74 0.06 -51.70 -0.01
21 0.2511 -5151.53 ( 0.53) -50.85 ( -0.19)
22 0.2512 -5153.55 -0.12 -50.66 -0.04
23 0.2512 -5154.59 0.15 -50.56 0.03
24 0.2513 -5156.22 -0.11 -50.49 0.05
25 0.2597 -5336.71 -0.21 -46.51 -0.19
26 0.2597 -5338.09 -0.06 -46.35 -0.08
27 0.2625 -5396.76 0.00 -44.98 -0.20
28 0.2626 -5397.13 -0.07 -44.70 0.06
29 0.2654 -5455.58 -0.03 -43.26 -0.05
30 0.3250 -6465.30 -0.08 -2.30 0.09
31 0.3388 -6626.17 0.14 9.17 0.12
32 0.3389 -6627.63 0.10 9.26 0.08
33 0.3417 -6656.70 0.04 11.51 -0.07
34 0.9009 4207.68 -0.00 143.54 0.01
35 0.9037 4232.47 0.01 141.37 0.01
36 0.9721 4429.16 0.13 86.95 0.28
37 0.9830 4385.75 -0.01 78.20 -0.02
38 1.0544 3628.72 -0.00 29.72 0.01
39 1.0567 3591.26 0.07 28.53 0.21
40 1.0704 3358.52 -0.05 21.16 0.09
41 1.2232 -187.95 0.08 4.28 -0.04
42 1.2233 -191.64 -0.03 4.21 -0.18
43 1.2235 -195.28 -0.09 4.63 0.17
44 1.2286 -317.43 0.21 6.10 -0.04
45 1.2289 -324.38 -0.03 6.27 -0.01
46 1.2292 -331.08 -0.09 6.46 0.04
47 1.2341 -446.32 0.07 8.14 -0.00
48 1.2342 -450.22 -0.05 8.26 0.03
49 1.2344 -454.55 -0.05 8.35 0.03
50 1.2396 -574.80 -0.09 10.31 -0.03
51 1.2969 -1749.22 -0.03 42.29 -0.01
52 1.3134 -2015.82 -0.06 54.20 -0.09
53 1.3739 -2634.81 0.02 106.16 0.29
54 1.4586 -2405.83 0.03 186.49 -0.00
55 3.4982 6547.68 0.02 351.63 -0.07
56 3.4982 6547.96 -0.04 351.70 -0.02
57 3.9756 17290.01 0.00 281.06 -0.10
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.
13UW16 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.674 44.681 44.667 ecceobj 0.072 0.072 0.071 incobj 1.972 1.972 1.972 qmin 40.045 40.048 40.088 qmax 49.014 49.054 48.949 amean 44.415 44.421 44.408 amin 44.057 44.063 44.044 amax 44.809 44.790 44.757 emean 0.079 0.080 0.079 emin 0.064 0.064 0.063 emax 0.095 0.095 0.094 imean 0.756 0.756 0.756 imin 0.063 0.059 0.063 imax 1.218 1.220 1.219 excite_mean 0.081 0.081 0.080 fracstop 1.000 1.000 1.000 cjmean 3.099 3.099 3.099 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 167.6 167.8 167.8 kozaiamp 180.0 179.9 179.9