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: 17DU159 # Created Thu Apr 3 01:11:07 2025 # Orbit generated from Bernstein formalism # Fitting 106 observations of 107 # Arc: 2.45y # First observation: 2016/11/25 # Last observation: 2019/05/09 Preliminary a, adot, b, bdot, g, gdot: 0.000021 0.026684 0.000003 -0.000369 0.025714 0.000000 # Chi-squared of fit: 87.11 DOF: 206 RMS: 0.16 # Min/Max residuals: -0.53 0.44 # Exact a, adot, b, bdot, g, gdot: 1.786574E-05 2.619163E-02 5.219706E-07 -3.680544E-04 2.515426E-02 1.841033E-03 # Covariance matrix: 4.1293E-14 1.6711E-14 5.4977E-15 -1.4070E-15 4.7088E-14 5.5973E-13 1.6711E-14 9.9632E-13 4.6033E-14 -7.9136E-14 4.2762E-13 2.9480E-11 5.4977E-15 4.6033E-14 2.1988E-14 -2.6015E-14 2.6579E-14 1.3726E-12 -1.4070E-15 -7.9136E-14 -2.6015E-14 9.4903E-14 -3.4463E-14 -2.6365E-12 4.7088E-14 4.2762E-13 2.6579E-14 -3.4463E-14 2.4135E-13 1.2888E-11 5.5973E-13 2.9480E-11 1.3726E-12 -2.6365E-12 1.2888E-11 9.8094E-10 # lat0 lon0 xBary yBary zBary JD0 -9.086807 151.986450 0.991587 -0.003672 -0.024206 2457718.062129 # Heliocentric elements and errors Epoch: 2457710.5000 = 2016/11/18 Mean Anomaly: 20.48317 +/- 0.459 Argument of Peri: 237.86987 +/- 0.592 Long of Asc Node: 247.15808 +/- 0.004 Inclination: 9.13787 +/- 0.000 Eccentricity: 0.11071600 +/- 0.0006 Semi-Major Axis: 44.30858872 +/- 0.0095 Time of Perihelion: 2451581.0018 +/- 137.2 Perihelion: 39.40291889 +/- 0.0299 Aphelion: 49.21425855 +/- 0.0306 Period (y) 294.9443 +/- 0.10 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -34.21613715 +/- 0.0007 Ecliptic Y 19.32026243 +/- 0.0004 Ecliptic Z -6.27850616 +/- 0.0001 Ecliptic XDOT -0.00150572 +/- 0.0000 Ecliptic YDOT -0.00243354 +/- 0.0000 Ecliptic ZDOT -0.00007125 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 39.79241412 +/- 0.0006 Geocenter to KBO 39.75469862 +/- 0.0008 # Hcoef: 9.24
The following table shows the complete astrometric record for 17DU159. 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 (17DU159) followed by the observatory code and reference code for the source of the astrometry.
2016 11 25.56134 10 02 58.45 +02 16 07.1 26.0g 17DU159 T09 C~7ujI 2016 11 25.60304 10 02 58.51 +02 16 06.6 25.4i 17DU159 T09 C~7ujI 2016 11 25.61456 10 02 58.48 +02 16 06.4 24.9i 17DU159 T09 C~7ujI 2016 11 25.62230 10 02 58.48 +02 16 05.9 25.0i 17DU159 T09 C~7ujI 2016 11 25.62614 10 02 58.49 +02 16 06.3 25.5i 17DU159 T09 C~7ujI 2016 11 25.62997 10 02 58.49 +02 16 05.9 25.3i 17DU159 T09 C~7ujI 2016 11 28.59529 10 02 59.17 +02 15 16.2 26.4r 17DU159 T09 C~7ujI 2016 11 28.60294 10 02 59.17 +02 15 16.2 26.1r 17DU159 T09 C~7ujI 2016 11 28.60679 10 02 59.17 +02 15 16.0 26.2r 17DU159 T09 C~7ujI 2016 11 28.61062 10 02 59.17 +02 15 16.0 26.2r 17DU159 T09 C~7ujI 2016 12 25.50742 10 02 26.93 +02 11 40.3 26.4r 17DU159 T09 C~7ujI 2016 12 25.52138 10 02 26.92 +02 11 39.8 25.6r 17DU159 T09 C~7ujI 2016 12 25.53531 10 02 26.85 +02 11 39.8 25.6r 17DU159 T09 C~7ujI 2016 12 25.54929 10 02 26.83 +02 11 39.6 24.9r 17DU159 T09 C~7ujI 2016 12 25.57937 10 02 26.80 +02 11 39.3 25.2i 17DU159 T09 C~7ujI 2016 12 25.60159 10 02 26.72 +02 11 40.0 25.8i 17DU159 T09 C~7ujI 2016 12 25.62003 10 02 26.68 +02 11 39.8 25.6i 17DU159 T09 C~7ujI 2016 12 25.62385 10 02 26.65 +02 11 39.8 24.8i 17DU159 T09 C~7ujI 2017 01 02.43017 10 02 05.27 +02 11 58.7 24.2z 17DU159 T09 C~7ujJ 2017 01 02.43400 10 02 05.27 +02 11 58.8 24.2z 17DU159 T09 C~7ujJ 2017 01 02.43785 10 02 05.26 +02 11 58.8 24.4z 17DU159 T09 C~7ujJ 2017 01 02.44565 10 02 05.22 +02 11 59.0 24.7z 17DU159 T09 C~7ujJ 2017 01 02.45331 10 02 05.20 +02 11 59.3 25.0z 17DU159 T09 C~7ujJ 2017 01 02.49315 10 02 05.07 +02 11 59.7 25.7i 17DU159 T09 C~7ujJ 2017 01 02.50080 10 02 05.04 +02 11 59.3 25.3i 17DU159 T09 C~7ujJ 2017 01 02.50463 10 02 05.04 +02 11 59.5 25.3i 17DU159 T09 C~7ujJ 2017 01 02.50845 10 02 05.02 +02 11 59.5 25.3i 17DU159 T09 C~7ujJ 2017 01 02.51228 10 02 05.01 +02 11 59.4 25.3i 17DU159 T09 C~7ujJ 2017 01 02.51611 10 02 05.00 +02 11 59.5 25.4i 17DU159 T09 C~7ujJ 2017 01 02.51993 10 02 04.99 +02 11 59.4 25.6i 17DU159 T09 C~7ujJ 2017 01 21.42049 10 00 55.46 +02 15 12.6 24.1z 17DU159 T09 C~7ujJ 2017 01 21.44850 10 00 55.33 +02 15 13.1 24.5z 17DU159 T09 C~7ujJ 2017 01 21.45233 10 00 55.32 +02 15 13.1 24.1z 17DU159 T09 C~7ujJ 2017 01 21.46362 10 00 55.26 +02 15 13.3 24.1z 17DU159 T09 C~7ujJ 2017 01 21.48947 10 00 55.16 +02 15 13.8 24.6z 17DU159 T09 C~7ujJ 2017 01 21.49330 10 00 55.15 +02 15 14.0 25.0z 17DU159 T09 C~7ujJ 2017 01 21.51563 10 00 55.06 +02 15 14.0 24.7z 17DU159 T09 C~7ujJ 2017 01 21.51947 10 00 55.03 +02 15 14.2 24.1z 17DU159 T09 C~7ujJ 2017 01 21.52330 10 00 55.00 +02 15 14.2 23.7z 17DU159 T09 C~7ujJ 2017 01 21.54162 10 00 54.95 +02 15 14.5 24.6z 17DU159 T09 C~7ujJ 2017 01 21.54547 10 00 54.91 +02 15 14.7 24.0z 17DU159 T09 C~7ujJ 2017 01 23.35198 10 00 47.21 +02 15 43.0 25.6r 17DU159 T09 C~7ujJ 2017 01 23.37416 10 00 47.11 +02 15 43.5 24.8r 17DU159 T09 C~7ujJ 2017 01 23.43584 10 00 46.82 +02 15 44.7 25.0r 17DU159 T09 C~7ujJ 2017 01 23.44310 10 00 46.81 +02 15 44.6 24.8r 17DU159 T09 C~7ujJ 2017 01 23.45653 10 00 46.75 +02 15 44.9 24.8r 17DU159 T09 C~7ujJ 2017 01 23.50215 10 00 46.55 +02 15 45.9 24.7i 17DU159 T09 C~7ujJ 2017 01 23.50600 10 00 46.51 +02 15 45.6 24.6i 17DU159 T09 C~7ujJ 2017 01 23.53190 10 00 46.44 +02 15 46.1 25.6i 17DU159 T09 C~7ujJ 2017 01 23.53459 10 00 46.42 +02 15 46.1 24.4i 17DU159 T09 C~7ujJ 2017 01 23.54715 10 00 46.36 +02 15 46.2 24.7i 17DU159 T09 C~7ujJ 2017 01 23.56544 10 00 46.30 +02 15 46.4 25.2i 17DU159 T09 C~7ujJ 2017 01 23.56929 10 00 46.25 +02 15 46.7 25.0i 17DU159 T09 C~7ujJ 2017 01 23.59562 10 00 46.15 +02 15 47.1 25.0i 17DU159 T09 C~7ujJ 2017 01 23.59947 10 00 46.14 +02 15 47.1 25.1i 17DU159 T09 C~7ujJ 2017 01 30.42076 10 00 15.73 +02 17 49.7 24.6i 17DU159 T09 C~7ujJ 2017 01 30.44278 10 00 15.63 +02 17 50.3 24.9i 17DU159 T09 C~7ujJ 2017 01 30.44661 10 00 15.62 +02 17 50.2 25.1i 17DU159 T09 C~7ujJ 2017 01 30.46494 10 00 15.53 +02 17 50.5 24.6i 17DU159 T09 C~7ujJ 2017 02 01.36247 10 00 06.78 +02 18 28.6 25.9g 17DU159 T09 C~7ujJ 2017 02 01.40890 10 00 06.57 +02 18 29.6 26.4g 17DU159 T09 C~7ujJ 2017 02 01.45183 10 00 06.37 +02 18 30.6 25.6g 17DU159 T09 C~7ujJ 2017 02 02.42933 10 00 01.81 +02 18 50.8 25.5r 17DU159 T09 C~7ujJ 2017 02 02.47353 10 00 01.60 +02 18 51.6 25.3r 17DU159 T09 C~7ujJ 2017 02 02.59627 10 00 01.02 +02 18 54.0 24.7i 17DU159 T09 C~7ujJ 2017 02 21.33121 09 58 31.03 +02 26 26.1 24.9z 17DU159 T09 C~7ujJ 2017 02 21.33504 09 58 31.03 +02 26 26.6 24.6z 17DU159 T09 C~7ujJ 2017 02 21.33887 09 58 31.00 +02 26 26.3 25.2z 17DU159 T09 C~7ujJ 2017 02 21.34253 09 58 30.97 +02 26 26.5 24.5z 17DU159 T09 C~7ujJ 2017 02 21.35676 09 58 30.92 +02 26 26.8 24.1z 17DU159 T09 C~7ujJ 2017 02 21.36441 09 58 30.86 +02 26 27.3 25.0z 17DU159 T09 C~7ujJ 2017 02 21.36806 09 58 30.86 +02 26 27.3 25.2z 17DU159 T09 C~7ujJ 2017 02 21.40807 09 58 30.68 +02 26 28.7 24.9z 17DU159 T09 C~7ujJ 2017 02 21.41563 09 58 30.61 +02 26 29.0 25.7z 17DU159 T09 C~7ujJ 2017 02 23.32550 09 58 21.44 +02 27 20.2 26.1g 17DU159 T09 C~7ujJ 2017 02 23.35980 09 58 21.27 +02 27 21.2 26.2g 17DU159 T09 C~7ujJ 2017 02 23.46231 09 58 20.74 +02 27 24.0 25.5r 17DU159 T09 C~7ujJ 2017 02 23.47596 09 58 20.68 +02 27 24.4 25.2r 17DU159 T09 C~7ujJ 2017 02 23.50008 09 58 20.57 +02 27 25.0 25.1r 17DU159 T09 C~7ujJ 2017 02 23.50391 09 58 20.55 +02 27 25.2 25.5r 17DU159 T09 C~7ujJ 2017 02 23.50705 09 58 20.52 +02 27 25.4 25.0r 17DU159 T09 C~7ujJ 2017 02 25.41636 09 58 11.41 +02 28 17.9 25.7i 17DU159 T09 C~7ujJ 2017 02 25.42020 09 58 11.36 +02 28 17.9 25.1i 17DU159 T09 C~7ujJ 2017 02 25.42391 09 58 11.35 +02 28 18.2 25.3i 17DU159 T09 C~7ujJ 2017 02 25.44233 09 58 11.26 +02 28 18.7 24.6i 17DU159 T09 C~7ujJ 2017 03 04.29967 09 57 39.01 +02 31 31.8 24.1z 17DU159 T09 C~7ujJ 2017 03 04.31098 09 57 38.95 +02 31 32.6 24.4z 17DU159 T09 C~7ujJ 2017 03 04.35463 09 57 38.74 +02 31 33.6 24.7z 17DU159 T09 C~7ujJ 2017 03 04.44130 09 57 38.35 +02 31 36.1 24.8i 17DU159 T09 C~7ujJ 2017 03 04.44514 09 57 38.33 +02 31 36.3 24.7i 17DU159 T09 C~7ujJ 2017 03 04.47080 09 57 38.22 +02 31 37.1 25.1i 17DU159 T09 C~7ujJ 2017 03 04.49253 09 57 38.09 +02 31 37.6 25.1i 17DU159 T09 C~7ujJ 2017 03 22.27879 09 56 22.36 +02 40 13.4 26.1g 17DU159 T09 C~7ujJ 2017 03 22.29262 09 56 22.31 +02 40 13.9 25.6g 17DU159 T09 C~7ujJ 2017 03 22.32046 09 56 22.20 +02 40 14.9 26.0g 17DU159 T09 C~7ujJ 2017 03 22.34162 09 56 22.11 +02 40 15.2 25.5g 17DU159 T09 C~7ujJ 2017 03 22.40964 09 56 21.88 +02 40 17.4 25.7z 17DU159 T09 C~7ujJ 2017 03 22.43533 09 56 21.75 +02 40 17.9 24.8z 17DU159 T09 C~7ujJ 2017 03 22.48274 09 56 21.58 +02 40 19.6 25.5z 17DU159 T09 C~7ujJ 2017 03 25.26876 09 56 11.19 +02 41 38.9 25.6r 17DU159 T09 C~7ujJ 2017 03 25.28248 09 56 11.15 +02 41 39.6 25.2r 17DU159 T09 C~7ujJ 2017 03 25.29622 09 56 11.09 +02 41 39.7 25.4r 17DU159 T09 C~7ujJ 2018 01 17.518288 10 06 54.75 +01 40 43.0 17DU159 T09 C~81Bu 2018 01 17.545345 10 06 54.64 +01 40 43.4 17DU159 T09 C~81Bu 2019 02 05.422693 10 11 15.67 +01 12 32.3 17DU159 T09 C~81Bu 2019 05 09.256100 10 05 59.92 +01 52 29.2 17DU159 T09 C~81Bu 2019 05 09.378507 10 05 59.88 +01 52 31.1 17DU159 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 -0.29 0.00 -0.16
2 0.0001 1.02 0.29 -0.15 0.31
3 0.0001 0.67 -0.18 -0.50 0.14
4 0.0002 0.84 -0.08 -0.97 -0.21
5 0.0002 0.84 -0.12 -0.54 0.27
6 0.0002 0.98 -0.02 -0.91 -0.05
7 0.0083 27.99 0.00 -43.86 -0.04
8 0.0083 27.99 -0.04 -43.86 0.07
9 0.0083 28.06 0.01 -44.05 -0.06
10 0.0083 28.06 -0.01 -44.05 -0.00
11 0.0820 -348.56 -0.34 -415.80 0.44
12 0.0820 -348.52 0.19 -416.32 0.10
13 0.0821 -349.50 -0.31 -416.69 -0.08
14 0.0821 -349.71 -0.03 -416.99 -0.19
15 0.0822 -350.03 ( 0.72) -417.42 ( -0.24)
16 0.0822 -351.40 0.13 -417.19 0.29
17 0.0823 -351.89 0.29 -417.59 0.13
18 0.0823 -352.31 0.00 -417.75 0.02
19 0.1037 -658.99 0.20 -512.64 -0.37
20 0.1037 -659.02 0.33 -512.55 -0.23
21 0.1037 -659.16 0.37 -512.60 -0.23
22 0.1037 -659.79 0.09 -512.63 -0.17
23 0.1037 -660.18 0.05 -512.45 0.10
24 0.1039 -662.15 -0.10 -512.76 0.26
25 0.1039 -662.43 -0.03 -513.29 -0.18
26 0.1039 -662.50 0.08 -513.11 0.06
27 0.1039 -662.78 -0.03 -513.21 -0.00
28 0.1039 -662.88 0.04 -513.36 -0.10
29 0.1039 -663.06 0.04 -513.32 -0.02
30 0.1039 -663.16 0.11 -513.46 -0.12
31 0.1557 -1706.83 0.08 -698.60 -0.04
32 0.1557 -1708.83 -0.08 -698.82 -0.02
33 0.1558 -1708.97 0.04 -698.87 -0.04
34 0.1558 -1709.89 -0.13 -699.00 -0.08
35 0.1559 -1711.46 -0.01 -699.06 0.08
36 0.1559 -1711.68 0.03 -698.92 0.25
37 0.1559 -1712.94 0.24 -699.40 -0.04
38 0.1559 -1713.43 0.00 -699.37 0.02
39 0.1560 -1713.85 -0.16 -699.53 -0.11
40 0.1560 -1714.66 0.24 -699.51 0.06
41 0.1560 -1715.29 -0.14 -699.53 0.07
42 0.1610 -1833.30 -0.09 -713.56 -0.17
43 0.1610 -1834.88 -0.18 -713.62 -0.06
44 0.1612 -1839.37 -0.53 -714.02 0.02
45 0.1612 -1839.47 -0.14 -714.16 -0.07
46 0.1612 -1840.42 -0.18 -714.20 0.00
47 0.1614 -1843.58 -0.26 -714.32 0.25
48 0.1614 -1844.04 -0.46 -714.81 -0.21
49 0.1615 -1845.19 0.14 -714.71 0.09
50 0.1615 -1845.47 0.04 -714.81 0.01
51 0.1615 -1846.35 0.01 -715.03 -0.12
52 0.1615 -1847.26 0.33 -715.16 -0.10
53 0.1616 -1848.07 -0.21 -715.15 -0.05
54 0.1616 -1849.62 0.02 -715.30 0.00
55 0.1616 -1849.76 0.14 -715.35 -0.02
56 0.1803 -2319.63 0.02 -760.57 -0.14
57 0.1804 -2321.24 -0.00 -760.53 0.03
58 0.1804 -2321.35 0.17 -760.68 -0.09
59 0.1804 -2322.72 0.13 -760.87 -0.17
60 0.1856 -2458.91 -0.05 -771.23 -0.00
61 0.1858 -2462.21 0.05 -771.40 0.09
62 0.1859 -2465.37 0.05 -771.51 0.23
63 0.1886 -2536.46 -0.13 -776.59 0.22
64 0.1887 -2539.69 -0.09 -776.94 0.11
65 0.1890 -2548.67 0.01 -777.75 -0.02
66 0.2403 -3970.62 0.01 -827.60 -0.25
67 0.2403 -3970.80 0.13 -827.13 0.22
68 0.2403 -3971.11 0.11 -827.57 -0.22
69 0.2403 -3971.60 -0.09 -827.54 -0.18
70 0.2404 -3972.41 0.22 -827.52 -0.16
71 0.2404 -3973.43 -0.20 -827.37 0.00
72 0.2404 -3973.43 0.08 -827.37 0.00
73 0.2405 -3976.45 0.21 -827.00 0.40
74 0.2405 -3977.54 -0.29 -827.09 0.31
75 0.2458 -4124.25 0.29 -827.34 -0.03
76 0.2459 -4126.98 0.24 -827.30 0.02
77 0.2461 -4135.41 -0.16 -827.46 -0.13
78 0.2462 -4136.39 -0.07 -827.40 -0.07
79 0.2462 -4138.14 0.06 -827.42 -0.08
80 0.2462 -4138.50 0.01 -827.34 0.00
81 0.2463 -4138.99 -0.24 -827.31 0.03
82 0.2515 -4285.31 0.25 -826.02 0.19
83 0.2515 -4286.02 -0.15 -826.28 -0.08
84 0.2515 -4286.26 -0.11 -826.05 0.15
85 0.2516 -4287.70 -0.11 -826.06 0.14
86 0.2703 -4808.27 0.11 -814.67 -0.29
87 0.2704 -4809.39 -0.15 -814.23 0.12
88 0.2705 -4812.69 -0.13 -814.40 -0.14
89 0.2707 -4819.05 0.11 -814.11 -0.04
90 0.2707 -4819.40 0.05 -814.03 0.04
91 0.2708 -4821.22 0.17 -813.86 0.15
92 0.2709 -4823.22 -0.18 -814.07 -0.11
93 0.3196 -6067.67 -0.04 -728.64 -0.16
94 0.3196 -6068.55 -0.02 -728.44 -0.05
95 0.3197 -6070.45 -0.11 -728.08 0.13
96 0.3197 -6071.82 -0.10 -728.27 -0.19
97 0.3199 -6075.82 0.32 -727.42 0.22
98 0.3200 -6077.82 -0.02 -727.63 -0.16
99 0.3201 -6080.80 0.06 -726.93 0.24
100 0.3277 -6254.55 0.02 -707.18 -0.18
101 0.3278 -6255.36 0.07 -706.74 0.17
102 0.3278 -6256.24 0.05 -706.96 -0.15
103 1.1443 4063.69 0.10 -742.47 0.07
104 1.1444 4062.00 0.06 -742.68 0.12
105 2.1954 8325.05 0.03 -946.98 -0.04
106 2.4495 3045.37 -0.04 -370.70 0.00
107 2.4499 3044.14 -0.07 -369.13 -0.03
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.
17DU159 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.136 44.178 44.096 ecceobj 0.109 0.111 0.106 incobj 9.124 9.124 9.124 qmin 38.601 38.442 38.610 qmax 49.922 50.119 49.802 amean 44.132 44.184 44.092 amin 43.778 43.822 43.733 amax 44.518 44.585 44.485 emean 0.108 0.111 0.106 emin 0.094 0.097 0.092 emax 0.123 0.125 0.120 imean 10.714 10.705 10.717 imin 10.070 10.058 10.075 imax 11.325 11.337 11.331 excite_mean 0.215 0.216 0.214 fracstop 1.000 1.000 1.000 cjmean 3.047 3.047 3.047 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 185.8 184.7 185.2 kozaiamp 179.9 180.0 180.0