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: 15KW173
# Created Sun Dec 22 02:10:23 2024
# Orbit generated from Bernstein formalism
# Fitting 38 observations of 39
# Arc: 3.24y
# First observation: 2014/05/30
# Last observation: 2017/08/24
Preliminary a, adot, b, bdot, g, gdot:
0.000116 0.033260 -0.000058 -0.011035 0.030287 0.000000
# Chi-squared of fit: 17.19 DOF: 70 RMS: 0.12
# Min/Max residuals: -0.33 0.32
# Exact a, adot, b, bdot, g, gdot:
1.766563E-05 3.381693E-02 -5.801660E-06 -1.124270E-02 3.078535E-02 4.372405E-03
# Covariance matrix:
1.6152E-13 -1.8021E-13 -1.8277E-14 4.2235E-14 -4.4473E-14 -1.2437E-12
-1.8021E-13 3.6609E-13 4.6154E-14 -1.0841E-13 7.0693E-14 3.1898E-12
-1.8277E-14 4.6154E-14 1.1737E-13 -7.0164E-14 1.3227E-14 4.5574E-13
4.2235E-14 -1.0841E-13 -7.0164E-14 7.8239E-14 -2.5610E-14 -1.0678E-12
-4.4473E-14 7.0693E-14 1.3227E-14 -2.5610E-14 1.4916E-13 7.6127E-13
-1.2437E-12 3.1898E-12 4.5574E-13 -1.0678E-12 7.6127E-13 3.1422E-11
# lat0 lon0 xBary yBary zBary JD0
6.800073 -125.820531 -0.256856 0.116295 -0.974829 2456807.894078
# Heliocentric elements and errors
Epoch: 2456800.5000 = 2014/05/23
Mean Anomaly: 33.12137 +/- 0.016
Argument of Peri: 111.13511 +/- 0.030
Long of Asc Node: 73.62308 +/- 0.000
Inclination: 19.56274 +/- 0.000
Eccentricity: 0.20031908 +/- 0.0002
Semi-Major Axis: 39.45788928 +/- 0.0039
Time of Perihelion: 2448471.2675 +/- 4.0
Perihelion: 31.55372130 +/- 0.0067
Aphelion: 47.36205725 +/- 0.0076
Period (y) 247.8614 +/- 0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -19.24454681 +/- 0.0002
Ecliptic Y -27.09858494 +/- 0.0003
Ecliptic Z 3.84602824 +/- 0.0000
Ecliptic XDOT 0.00213810 +/- 0.0000
Ecliptic YDOT -0.00217283 +/- 0.0000
Ecliptic ZDOT -0.00094665 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 33.45859861 +/- 0.0003
Geocenter to KBO 32.48298484 +/- 0.0004
# Hcoef: 9.44
The following table shows the complete astrometric record for 15KW173. 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 (15KW173) followed by the observatory code and reference code for the source of the astrometry.
2014 05 30.39330 15 34 03.815 -12 13 05.60 24.4r 15KW173 568 C~2lVH 2014 05 31.43190 15 33 57.797 -12 12 54.40 24.3r 15KW173 568 C~2lVH 2014 06 01.32025 15 33 52.683 -12 12 44.71 24.7r 15KW173 568 C~2lVH 2014 06 01.36329 15 33 52.402 -12 12 43.78 23.6r 15KW173 568 C~2lVH 2014 06 01.40622 15 33 52.161 -12 12 43.68 25.2r 15KW173 568 C~2lVH 2014 06 22.31762 15 32 02.098 -12 10 21.56 24.6r 15KW173 568 C~2lVH 2014 06 22.36048 15 32 01.901 -12 10 21.27 24.1r 15KW173 568 C~2lVH 2014 07 19.33364 15 30 27.896 -12 11 51.93 24.3r 15KW173 568 C~2lVH 2015 02 23.64017 15 47 24.664 -13 38 10.37 25.6r 15KW173 568 C~2lVH 2015 03 19.59955 15 47 03.058 -13 35 06.42 24.3r 15KW173 568 C~2lVH 2015 03 22.52231 15 46 55.863 -13 34 32.08 24.7r 15KW173 568 C~2lVH 2015 04 12.51679 15 45 39.236 -13 29 35.37 24.3r 15KW173 568 C~2lVH 2015 04 12.55771 15 45 39.031 -13 29 34.34 25.1r 15KW173 568 C~2lVH 2015 04 18.53999 15 45 10.391 -13 27 59.77 25.1r 15KW173 568 C~2lVH 2015 05 17.41261 15 42 27.083 -13 20 29.32 24.6r 15KW173 568 C~2lVH 2015 05 17.50638 15 42 26.504 -13 20 27.71 24.6r 15KW173 568 C~2lVH 2015 05 24.39782 15 41 45.091 -13 18 55.74 24.7r 15KW173 568 C~2lVH 2015 05 24.44391 15 41 44.808 -13 18 55.25 24.4r 15KW173 568 C~2lVH 2015 05 24.48500 15 41 44.555 -13 18 54.71 24.2r 15KW173 568 C~2lVH 2015 05 26.47305 15 41 32.688 -13 18 30.24 24.4r 15KW173 568 C~2lVH 2015 06 18.36794 15 39 24.684 -13 15 08.55 25.1r 15KW173 568 C~2lVH 2015 06 18.40888 15 39 24.489 -13 15 08.52 24.9r 15KW173 568 C~2lVH 2015 07 10.41926 15 37 51.417 -13 14 54.55 25.1r 15KW173 568 C~2lVH 2015 07 18.34401 15 37 28.418 -13 15 39.81 24.2r 15KW173 568 C~2lVH 2016 02 12.63894 15 54 02.376 -14 39 03.65 24.9w 15KW173 568 C~2lVH 2016 03 17.62205 15 54 04.361 -14 37 00.57 24.8w 15KW173 568 C~2lVH 2016 04 03.58308 15 53 15.362 -14 33 52.16 25.4w 15KW173 568 C~2lVH 2016 04 09.57657 15 52 51.324 -14 32 32.26 24.6w 15KW173 568 C~2lVH 2016 04 29.52576 15 51 12.020 -14 27 43.83 24.9w 15KW173 568 C~2lVH 2016 05 04.49833 15 50 43.842 -14 26 30.99 25.1w 15KW173 568 C~2lVH 2016 05 30.44581 15 48 09.232 -14 20 53.72 24.7w 15KW173 568 C~2lVH 2016 07 04.32652 15 45 10.907 -14 17 42.96 15KW173 568 C~2lVH 2016 07 05.39888 15 45 06.703 -14 17 43.94 24.6w 15KW173 568 C~2lVH 2017 03 30.58668 16 00 31.192 -15 35 23.30 25.0w 15KW173 568 C~2lVH 2017 05 21.54752 15 56 09.016 -15 24 31.23 25.4w 15KW173 568 C~2lVH 2017 05 21.56169 15 56 08.929 -15 24 31.15 25.9w 15KW173 568 C~2lVH 2017 05 24.52991 15 55 51.003 -15 23 56.53 24.8w 15KW173 568 C~2lVH 2017 05 25.53328 15 55 44.955 -15 23 45.12 25.0w 15KW173 568 C~2lVH 2017 08 24.25065 15 50 55.192 -15 27 23.90 24.7w 15KW173 568 C~2lVH
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 -0.06 0.00 0.01
2 0.0028 -88.35 0.19 -10.14 -0.21
3 0.0053 -163.48 0.19 -18.60 -0.05
4 0.0054 -167.70 -0.33 -18.68 0.32
5 0.0055 -171.15 -0.10 -19.42 0.01
6 0.0628 -1772.06 0.08 -267.42 -0.05
7 0.0629 -1774.93 0.13 -267.83 0.14
8 0.1367 -3091.08 0.02 -687.65 0.11
9 0.7372 12588.76 0.01 -2252.38 0.22
10 0.8028 12239.07 0.08 -2143.95 -0.01
11 0.8108 12128.72 0.03 -2134.14 -0.03
12 0.8682 10969.37 0.12 -2098.01 -0.23
13 0.8683 10966.22 -0.16 -2097.69 0.10
14 0.8847 10536.71 ( 0.43) -2100.52 ( -0.21)
15 0.9638 8108.91 -0.06 -2207.32 -0.11
16 0.9640 8100.30 -0.19 -2207.70 0.15
17 0.9829 7490.02 -0.03 -2257.55 0.10
18 0.9830 7485.89 -0.04 -2258.03 0.00
19 0.9831 7482.16 -0.08 -2258.36 0.01
20 0.9886 7307.74 0.04 -2274.56 -0.08
21 1.0513 5441.39 0.00 -2512.09 -0.15
22 1.0514 5438.62 0.27 -2512.72 -0.27
23 1.1116 4113.36 -0.07 -2816.96 -0.07
24 1.1333 3797.45 -0.10 -2939.81 -0.05
25 1.7064 19081.18 -0.03 -4541.67 -0.04
26 1.7994 19082.29 0.17 -4414.67 0.10
27 1.8458 18340.77 -0.04 -4385.67 -0.15
28 1.8622 17979.89 -0.01 -4383.98 0.09
29 1.9169 16499.11 0.09 -4419.54 0.02
30 1.9305 16081.18 -0.05 -4438.94 -0.08
31 2.0015 13803.91 -0.04 -4610.20 -0.01
32 2.0970 11226.17 0.07 -5009.01 0.11
33 2.0999 11166.70 -0.17 -5023.85 -0.02
34 2.8342 25384.21 -0.01 -6655.79 0.12
35 2.9765 21491.31 -0.07 -6821.77 0.02
36 2.9765 21490.05 -0.05 -6821.96 -0.08
37 2.9846 21226.56 -0.02 -6843.83 -0.06
38 2.9874 21137.74 0.08 -6851.49 -0.02
39 3.2357 17061.56 0.13 -7980.54 0.16
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.
15KW173 quality flag:3 Type: 3:2E 3:2E 3:2E Type: 6:4II axisobj 39.184 39.197 39.172 ecceobj 0.194 0.195 0.194 incobj 19.570 19.570 19.570 qmin 26.814 26.822 26.776 qmax 52.481 52.469 52.534 amean 39.454 39.454 39.454 amin 39.090 39.083 39.096 amax 39.910 39.908 39.900 emean 0.259 0.259 0.259 emin 0.182 0.182 0.182 emax 0.318 0.317 0.319 imean 15.109 15.147 15.075 imin 11.849 11.921 11.802 imax 18.700 18.692 18.706 excite_mean 0.371 0.371 0.371 fracstop 1.000 1.000 1.000 cjmean 2.895 2.895 2.895 libcent 0 180.3 181.0 179.8 libamp 0 35.2 41.6 30.9 libcent 1 -180.0 -180.0 173.6 libamp 1 -180.0 -180.0 172.5 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 89.4 89.5 89.3 kozaiamp 67.7 67.5 67.9