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: 17DW159 # Created Wed Jul 17 01:11:30 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 87 observations of 87 # Arc: 15.13y # First observation: 2004/02/18 # Last observation: 2019/04/05 # Chi-squared of fit: 57.40 DOF: 168 RMS: 0.14 # Min/Max residuals: -0.36 0.58 # Exact a, adot, b, bdot, g, gdot: 1.371631E-05 2.619062E-02 5.404797E-06 1.175058E-02 2.996106E-02 4.673192E-03 # Covariance matrix: 1.4510E-12 -1.8454E-13 3.9888E-14 -3.5963E-14 -1.0041E-13 -2.1708E-13 -1.8454E-13 1.0088E-13 -4.5806E-14 4.1516E-14 4.8789E-14 2.5040E-13 3.9888E-14 -4.5806E-14 1.3790E-12 -1.2480E-13 -2.4699E-14 -1.2366E-13 -3.5963E-14 4.1516E-14 -1.2480E-13 2.6701E-14 2.1946E-14 1.1208E-13 -1.0041E-13 4.8789E-14 -2.4699E-14 2.1946E-14 1.6055E-13 1.3275E-13 -2.1708E-13 2.5040E-13 -1.2366E-13 1.1208E-13 1.3275E-13 6.7599E-13 # lat0 lon0 xBary yBary zBary JD0 -17.789870 131.761083 -0.297600 -0.286477 -0.893043 2453054.228820 # Heliocentric elements and errors Epoch: 2453054.5000 = 2004/02/19 Mean Anomaly: 127.08156 +/- 0.011 Argument of Peri: 177.12109 +/- 0.007 Long of Asc Node: 165.78144 +/- 0.000 Inclination: 29.45033 +/- 0.000 Eccentricity: 0.24487864 +/- 0.0000 Semi-Major Axis: 29.09154426 +/- 0.0011 Time of Perihelion: 2432822.9747 +/- 2.1 Perihelion: 21.96764637 +/- 0.0011 Aphelion: 36.21544215 +/- 0.0015 Period (y) 156.9128 +/- 0.01 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -22.01740182 +/- 0.0003 Ecliptic Y 24.20976696 +/- 0.0003 Ecliptic Z -10.19729989 +/- 0.0001 Ecliptic XDOT -0.00227830 +/- 0.0000 Ecliptic YDOT -0.00105262 +/- 0.0000 Ecliptic ZDOT 0.00089210 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 34.27619787 +/- 0.0003 Geocenter to KBO 33.37658303 +/- 0.0004 # Hcoef: 9.76
The following table shows the complete astrometric record for 17DW159. 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 (17DW159) followed by the observatory code and reference code for the source of the astrometry.
2004 02 18.728077 08 37 26.214 +00 07 35.85 17DW159 250 S~81Bu 2016 11 28.59145 10 02 42.13 +02 45 50.2 25.6r 17DW159 T09 C~7ujJ 2016 11 28.59529 10 02 42.11 +02 45 50.2 25.5r 17DW159 T09 C~7ujJ 2016 11 29.53506 10 02 42.10 +02 45 42.2 25.7i 17DW159 T09 C~7ujJ 2016 11 29.53891 10 02 42.08 +02 45 42.2 25.7i 17DW159 T09 C~7ujJ 2016 11 29.54278 10 02 42.09 +02 45 42.0 25.6i 17DW159 T09 C~7ujJ 2016 11 29.58575 10 02 42.09 +02 45 42.2 26.3z 17DW159 T09 C~7ujJ 2016 11 29.58959 10 02 42.08 +02 45 41.7 25.6z 17DW159 T09 C~7ujJ 2016 12 25.50742 10 02 04.15 +02 45 51.1 25.3r 17DW159 T09 C~7ujJ 2016 12 25.51310 10 02 04.14 +02 45 51.1 25.1r 17DW159 T09 C~7ujJ 2016 12 25.53531 10 02 04.08 +02 45 51.1 25.5r 17DW159 T09 C~7ujJ 2016 12 25.54929 10 02 04.02 +02 45 51.2 25.3r 17DW159 T09 C~7ujJ 2016 12 25.57554 10 02 03.96 +02 45 51.6 25.2i 17DW159 T09 C~7ujJ 2016 12 25.59777 10 02 03.89 +02 45 51.6 25.2i 17DW159 T09 C~7ujJ 2016 12 25.60159 10 02 03.85 +02 45 51.6 24.9i 17DW159 T09 C~7ujJ 2016 12 25.60907 10 02 03.86 +02 45 51.6 25.4i 17DW159 T09 C~7ujJ 2016 12 25.62003 10 02 03.81 +02 45 51.9 25.6i 17DW159 T09 C~7ujJ 2016 12 25.62385 10 02 03.79 +02 45 51.9 25.1i 17DW159 T09 C~7ujJ 2017 01 02.43785 10 01 39.37 +02 47 23.4 25.0z 17DW159 T09 C~7ujJ 2017 01 02.44565 10 01 39.32 +02 47 23.7 25.1z 17DW159 T09 C~7ujJ 2017 01 02.46507 10 01 39.25 +02 47 23.9 26.0z 17DW159 T09 C~7ujJ 2017 01 02.51228 10 01 39.09 +02 47 24.5 25.0i 17DW159 T09 C~7ujJ 2017 01 02.51993 10 01 39.06 +02 47 24.7 25.8i 17DW159 T09 C~7ujJ 2017 01 02.58611 10 01 38.82 +02 47 25.7 26.0g 17DW159 T09 C~7ujJ 2017 01 02.59203 10 01 38.80 +02 47 25.7 25.8g 17DW159 T09 C~7ujJ 2017 01 02.60039 10 01 38.79 +02 47 25.7 25.6g 17DW159 T09 C~7ujJ 2017 01 02.60627 10 01 38.75 +02 47 25.9 25.9g 17DW159 T09 C~7ujJ 2017 01 02.61463 10 01 38.71 +02 47 26.0 25.7g 17DW159 T09 C~7ujJ 2017 01 02.62041 10 01 38.70 +02 47 26.0 25.5g 17DW159 T09 C~7ujJ 2017 01 02.62872 10 01 38.65 +02 47 26.0 26.2g 17DW159 T09 C~7ujJ 2017 01 21.42316 10 00 20.08 +02 53 47.4 25.1z 17DW159 T09 C~7ujJ 2017 01 21.44467 10 00 19.97 +02 53 48.0 24.6z 17DW159 T09 C~7ujJ 2017 01 21.44850 10 00 19.95 +02 53 48.0 25.4z 17DW159 T09 C~7ujJ 2017 01 21.45233 10 00 19.94 +02 53 48.2 24.8z 17DW159 T09 C~7ujJ 2017 01 21.46362 10 00 19.88 +02 53 48.5 24.8z 17DW159 T09 C~7ujJ 2017 01 21.47848 10 00 19.83 +02 53 48.9 24.5z 17DW159 T09 C~7ujJ 2017 01 21.50455 10 00 19.68 +02 53 49.7 24.5z 17DW159 T09 C~7ujJ 2017 01 21.52708 10 00 19.57 +02 53 50.2 24.7z 17DW159 T09 C~7ujJ 2017 01 21.53071 10 00 19.55 +02 53 50.2 24.8z 17DW159 T09 C~7ujJ 2017 01 21.54935 10 00 19.45 +02 53 50.9 24.6z 17DW159 T09 C~7ujJ 2017 01 23.35198 10 00 10.77 +02 54 38.2 25.4r 17DW159 T09 C~7ujJ 2017 01 23.35517 10 00 10.75 +02 54 38.1 25.6r 17DW159 T09 C~7ujJ 2017 01 23.35766 10 00 10.74 +02 54 38.6 25.6r 17DW159 T09 C~7ujJ 2017 01 23.37982 10 00 10.62 +02 54 38.9 25.7r 17DW159 T09 C~7ujJ 2017 01 23.38262 10 00 10.61 +02 54 38.9 24.9r 17DW159 T09 C~7ujJ 2017 01 23.38565 10 00 10.59 +02 54 39.3 25.8r 17DW159 T09 C~7ujJ 2017 01 23.38883 10 00 10.56 +02 54 39.3 25.3r 17DW159 T09 C~7ujJ 2017 01 23.40271 10 00 10.52 +02 54 39.6 25.7r 17DW159 T09 C~7ujJ 2017 01 23.41887 10 00 10.43 +02 54 40.3 25.4r 17DW159 T09 C~7ujJ 2017 01 23.44005 10 00 10.33 +02 54 40.6 25.7r 17DW159 T09 C~7ujJ 2017 01 23.45653 10 00 10.24 +02 54 41.1 25.4r 17DW159 T09 C~7ujJ 2017 01 23.49071 10 00 10.08 +02 54 41.9 24.8i 17DW159 T09 C~7ujJ 2017 01 23.50600 10 00 09.99 +02 54 42.3 25.5i 17DW159 T09 C~7ujJ 2017 01 23.50979 10 00 09.98 +02 54 42.4 25.2i 17DW159 T09 C~7ujJ 2017 01 23.55094 10 00 09.78 +02 54 43.4 25.0i 17DW159 T09 C~7ujJ 2017 01 23.56544 10 00 09.70 +02 54 44.0 25.1i 17DW159 T09 C~7ujJ 2017 01 23.56929 10 00 09.70 +02 54 43.8 25.4i 17DW159 T09 C~7ujJ 2017 01 23.58131 10 00 09.60 +02 54 44.6 25.4i 17DW159 T09 C~7ujJ 2017 01 30.40627 09 59 35.20 +02 58 00.3 24.9i 17DW159 T09 C~7ujJ 2017 01 30.42829 09 59 35.09 +02 58 01.0 24.9i 17DW159 T09 C~7ujJ 2017 01 30.49455 09 59 34.73 +02 58 03.2 24.3z 17DW159 T09 C~7ujJ 2017 01 30.51687 09 59 34.61 +02 58 03.7 25.1z 17DW159 T09 C~7ujJ 2017 01 30.52066 09 59 34.60 +02 58 03.9 24.4z 17DW159 T09 C~7ujJ 2017 01 30.52425 09 59 34.56 +02 58 04.0 24.5z 17DW159 T09 C~7ujJ 2017 01 30.53900 09 59 34.51 +02 58 04.5 24.8z 17DW159 T09 C~7ujJ 2017 01 30.55001 09 59 34.44 +02 58 04.7 24.5z 17DW159 T09 C~7ujJ 2017 01 30.55385 09 59 34.40 +02 58 05.0 25.0z 17DW159 T09 C~7ujJ 2017 01 30.55762 09 59 34.40 +02 58 05.0 25.3z 17DW159 T09 C~7ujJ 2017 01 30.58347 09 59 34.26 +02 58 05.7 24.6z 17DW159 T09 C~7ujJ 2017 01 30.59788 09 59 34.18 +02 58 06.2 25.0z 17DW159 T09 C~7ujJ 2017 01 30.60170 09 59 34.16 +02 58 06.6 25.3z 17DW159 T09 C~7ujJ 2017 01 30.60540 09 59 34.15 +02 58 06.4 24.8z 17DW159 T09 C~7ujJ 2017 02 21.34253 09 57 36.72 +03 10 41.1 24.6z 17DW159 T09 C~7ujJ 2017 02 21.39368 09 57 36.43 +03 10 43.1 25.2z 17DW159 T09 C~7ujJ 2017 02 21.41563 09 57 36.32 +03 10 43.8 24.7z 17DW159 T09 C~7ujJ 2017 02 23.46231 09 57 25.16 +03 12 02.3 25.7r 17DW159 T09 C~7ujJ 2017 02 23.47596 09 57 25.11 +03 12 03.0 25.1r 17DW159 T09 C~7ujJ 2017 02 23.48959 09 57 25.03 +03 12 03.3 25.1r 17DW159 T09 C~7ujJ 2017 02 23.50705 09 57 24.94 +03 12 04.2 24.9r 17DW159 T09 C~7ujJ 2017 03 04.25993 09 56 38.29 +03 17 48.6 24.5z 17DW159 T09 C~7ujJ 2017 03 04.28551 09 56 38.13 +03 17 49.1 24.7z 17DW159 T09 C~7ujJ 2017 03 04.31098 09 56 38.00 +03 17 49.9 25.1z 17DW159 T09 C~7ujJ 2017 03 04.33650 09 56 37.85 +03 17 51.3 24.7z 17DW159 T09 C~7ujJ 2017 03 04.49253 09 56 37.02 +03 17 57.3 25.4i 17DW159 T09 C~7ujJ 2019 02 05.379881 10 10 58.69 +03 25 49.4 17DW159 T09 C~81Bu 2019 02 05.420020 10 10 58.48 +03 25 50.5 17DW159 T09 C~81Bu 2019 04 05.354730 10 06 08.32 +04 03 20.2 17DW159 T09 C~81Bu
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 0.15
2 12.7772 0.00 0.09 0.00 -0.00
3 12.7772 0.00 -0.21 0.00 0.03
4 12.7798 0.00 0.10 0.00 0.02
5 12.7798 0.00 -0.19 0.00 0.05
6 12.7798 0.00 -0.03 0.00 -0.12
7 12.7799 0.00 0.08 0.00 0.43
8 12.7799 0.00 -0.06 0.00 -0.04
9 12.8509 0.00 0.10 0.00 0.27
10 12.8509 0.00 0.19 0.00 0.22
11 12.8509 0.00 0.24 0.00 0.02
12 12.8510 0.00 -0.06 0.00 -0.01
13 12.8511 0.00 0.17 0.00 0.15
14 12.8511 0.00 0.08 0.00 -0.05
15 12.8511 0.00 -0.36 0.00 -0.09
16 12.8511 0.00 0.12 0.00 -0.15
17 12.8512 0.00 -0.16 0.00 0.05
18 12.8512 0.00 -0.30 0.00 0.01
19 12.8726 0.00 0.28 0.00 -0.11
20 12.8726 0.00 -0.06 0.00 0.08
21 12.8727 0.00 -0.07 0.00 0.00
22 12.8728 0.00 0.05 0.00 -0.08
23 12.8728 0.00 0.01 0.00 0.01
24 12.8730 0.00 -0.03 0.00 0.06
25 12.8730 0.00 -0.02 0.00 -0.03
26 12.8730 0.00 0.28 0.00 -0.15
27 12.8730 0.00 0.00 0.00 -0.03
28 12.8731 0.00 -0.15 0.00 -0.05
29 12.8731 0.00 0.01 0.00 -0.13
30 12.8731 0.00 -0.29 0.00 -0.25
31 12.9246 0.00 -0.01 0.00 -0.07
32 12.9246 0.00 -0.09 0.00 -0.03
33 12.9246 0.00 -0.11 0.00 -0.13
34 12.9246 0.00 0.02 0.00 -0.03
35 12.9247 0.00 -0.06 0.00 -0.02
36 12.9247 0.00 0.28 0.00 -0.00
37 12.9248 0.00 -0.06 0.00 0.12
38 12.9248 0.00 -0.06 0.00 0.04
39 12.9249 0.00 -0.09 0.00 -0.05
40 12.9249 0.00 -0.22 0.00 0.16
41 12.9298 0.00 0.10 0.00 -0.05
42 12.9298 0.00 0.04 0.00 -0.23
43 12.9299 0.00 0.07 0.00 0.20
44 12.9299 0.00 -0.08 0.00 -0.10
45 12.9299 0.00 -0.02 0.00 -0.17
46 12.9299 0.00 -0.10 0.00 0.15
47 12.9299 0.00 -0.31 0.00 0.06
48 12.9300 0.00 0.12 0.00 -0.01
49 12.9300 0.00 -0.03 0.00 0.25
50 12.9301 0.00 0.05 0.00 -0.02
51 12.9301 0.00 -0.06 0.00 0.04
52 12.9302 0.00 0.09 0.00 -0.08
53 12.9303 0.00 -0.11 0.00 -0.09
54 12.9303 0.00 0.02 0.00 -0.10
55 12.9304 0.00 0.10 0.00 -0.21
56 12.9304 0.00 -0.02 0.00 0.00
57 12.9304 0.00 0.27 0.00 -0.30
58 12.9305 0.00 -0.33 0.00 0.18
59 12.9492 0.00 0.08 0.00 -0.09
60 12.9492 0.00 0.17 0.00 -0.06
61 12.9494 0.00 0.03 0.00 0.12
62 12.9495 0.00 -0.01 0.00 -0.05
63 12.9495 0.00 0.15 0.00 0.03
64 12.9495 0.00 -0.17 0.00 0.02
65 12.9495 0.00 0.25 0.00 0.07
66 12.9495 0.00 0.07 0.00 -0.06
67 12.9496 0.00 -0.22 0.00 0.12
68 12.9496 0.00 0.07 0.00 0.01
69 12.9496 0.00 0.02 0.00 -0.08
70 12.9497 0.00 -0.04 0.00 -0.02
71 12.9497 0.00 -0.04 0.00 0.26
72 12.9497 0.00 0.10 0.00 -0.05
73 13.0092 0.00 -0.06 0.00 -0.06
74 13.0094 0.00 -0.15 0.00 -0.01
75 13.0094 0.00 0.03 0.00 -0.15
76 13.0150 0.00 -0.24 0.00 -0.12
77 13.0151 0.00 0.14 0.00 0.05
78 13.0151 0.00 0.07 0.00 -0.17
79 13.0151 0.00 0.16 0.00 0.05
80 13.0391 0.00 0.35 0.00 0.58
81 13.0392 0.00 -0.02 0.00 0.05
82 13.0392 0.00 0.05 0.00 -0.16
83 13.0393 0.00 -0.17 0.00 0.22
84 13.0397 0.00 -0.21 0.00 0.00
85 14.9641 0.00 -0.03 0.00 0.17
86 14.9642 0.00 0.02 0.00 -0.06
87 15.1256 0.00 -0.01 0.00 0.01
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.
17DW159 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 29.041 29.041 29.041 ecceobj 0.249 0.249 0.249 incobj 29.555 29.555 29.555 qmin 21.536 21.155 20.128 qmax 36.826 37.538 41.365 amean 29.124 29.102 29.849 amin 28.670 28.408 28.406 amax 29.905 29.728 31.127 emean 0.191 0.188 0.215 emin 0.071 0.051 0.053 emax 0.257 0.274 0.332 imean 29.409 28.668 28.358 imin 28.275 26.365 24.912 imax 31.056 31.296 31.247 excite_mean 0.531 0.519 0.527 fracstop 0.064 0.288 0.500 cjmean 2.717 2.721 2.713 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 201.6 184.2 186.7 kozaiamp 58.9 59.6 179.9