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: 17DN164 # Created Mon Jul 7 01:11:27 2025 # Orbit generated from Bernstein formalism # Fitting 46 observations of 46 # Arc: 1.87y # First observation: 2016/03/04 # Last observation: 2018/01/17 Preliminary a, adot, b, bdot, g, gdot: 0.000017 0.023716 0.000004 0.007602 0.025734 0.000000 # Chi-squared of fit: 38.94 DOF: 86 RMS: 0.16 # Min/Max residuals: -0.78 0.40 # Exact a, adot, b, bdot, g, gdot: 1.490268E-05 2.375722E-02 4.548417E-06 7.616040E-03 2.575070E-02 -7.967355E-04 # Covariance matrix: 3.5135E-13 -4.7545E-13 3.6305E-14 -8.6092E-14 -1.5617E-13 -5.4033E-12 -4.7545E-13 8.0024E-13 -7.3828E-14 1.7524E-13 3.0690E-13 1.0990E-11 3.6305E-14 -7.3828E-14 2.0612E-13 -1.8135E-13 -4.4785E-14 -1.3094E-12 -8.6092E-14 1.7524E-13 -1.8135E-13 2.0502E-13 1.0280E-13 3.0899E-12 -1.5617E-13 3.0690E-13 -4.4785E-14 1.0280E-13 4.1321E-13 6.6262E-12 -5.4033E-12 1.0990E-11 -1.3094E-12 3.0899E-12 6.6262E-12 1.9471E-10 # lat0 lon0 xBary yBary zBary JD0 -10.598063 150.617446 -0.226982 -0.176815 -0.945863 2457451.930568 # Heliocentric elements and errors Epoch: 2457450.5000 = 2016/03/03 Mean Anomaly: 209.58471 +/- 0.491 Argument of Peri: 122.51760 +/- 0.489 Long of Asc Node: 180.18572 +/- 0.001 Inclination: 20.49133 +/- 0.001 Eccentricity: 0.05551926 +/- 0.0002 Semi-Major Axis: 37.92560902 +/- 0.0034 Time of Perihelion: 2493094.5260 +/- 116.3 Perihelion: 35.82000739 +/- 0.0099 Aphelion: 40.03121065 +/- 0.0100 Period (y) 233.5646 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -34.21511880 +/- 0.0008 Ecliptic Y 19.00038444 +/- 0.0005 Ecliptic Z -7.14208450 +/- 0.0002 Ecliptic XDOT -0.00129669 +/- 0.0000 Ecliptic YDOT -0.00217574 +/- 0.0000 Ecliptic ZDOT 0.00081153 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 39.78314134 +/- 0.0008 Geocenter to KBO 38.83390167 +/- 0.0010 # Hcoef: 9.46
The following table shows the complete astrometric record for 17DN164. 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 (17DN164) followed by the observatory code and reference code for the source of the astrometry.
2016 03 04.429779 09 55 48.27 +01 19 23.9 17DN164 T09 C~81Bw 2016 03 04.459022 09 55 48.13 +01 19 24.7 17DN164 T09 C~81Bw 2016 03 09.294523 09 55 26.31 +01 22 10.6 17DN164 T09 C~81Bw 2016 03 09.314927 09 55 26.21 +01 22 11.4 17DN164 T09 C~81Bw 2017 01 21.48580 10 04 49.30 +00 55 47.3 24.8z 17DN164 T09 C~81Bw 2017 01 21.51187 10 04 49.18 +00 55 48.1 24.7z 17DN164 T09 C~81Bw 2017 01 21.56003 10 04 48.96 +00 55 49.1 24.7z 17DN164 T09 C~81Bw 2017 01 23.36273 10 04 41.38 +00 56 24.1 26.0r 17DN164 T09 C~8vIf 2017 01 23.39642 10 04 41.23 +00 56 24.2 26.3r 17DN164 T09 C~8vIf 2017 01 23.41024 10 04 41.21 +00 56 25.4 25.3r 17DN164 T09 C~81Bw 2017 01 23.44815 10 04 41.01 +00 56 26.1 25.7r 17DN164 T09 C~8vIf 2017 01 23.52068 10 04 40.72 +00 56 27.8 24.7i 17DN164 T09 C~81Bw 2017 01 23.56169 10 04 40.53 +00 56 28.3 25.1i 17DN164 T09 C~81Bw 2017 01 23.59193 10 04 40.39 +00 56 29.1 25.0i 17DN164 T09 C~81Bw 2017 02 02.52479 10 03 55.99 +01 00 15.1 25.4r 17DN164 T09 C~81Bw 2017 02 02.57410 10 03 55.76 +01 00 16.2 25.1i 17DN164 T09 C~81Bw 2017 02 02.58520 10 03 55.71 +01 00 16.6 25.2i 17DN164 T09 C~81Bw 2017 02 23.33599 10 02 16.26 +01 10 20.0 26.3g 17DN164 T09 C~81Bw 2017 02 23.46966 10 02 15.59 +01 10 24.4 25.7r 17DN164 T09 C~81Bw 2017 02 23.48331 10 02 15.52 +01 10 24.7 25.3r 17DN164 T09 C~81Bw 2017 02 23.49694 10 02 15.46 +01 10 25.4 25.2r 17DN164 T09 C~81Bw 2017 02 23.51437 10 02 15.37 +01 10 25.7 25.6r 17DN164 T09 C~81Bw 2017 03 04.29603 10 01 33.77 +01 15 18.3 24.9z 17DN164 T09 C~81Bw 2017 03 04.34714 10 01 33.52 +01 15 20.1 24.8z 17DN164 T09 C~81Bw 2017 03 04.48135 10 01 32.87 +01 15 24.4 25.5i 17DN164 T09 C~81Bw 2017 03 04.50300 10 01 32.80 +01 15 24.9 24.9i 17DN164 T09 C~81Bw 2017 03 22.39100 10 00 15.93 +01 25 45.5 25.1z 17DN164 T09 C~81Bw 2017 03 22.46802 10 00 15.61 +01 25 48.1 25.1z 17DN164 T09 C~81Bw 2017 03 22.48979 10 00 15.54 +01 25 49.2 24.7z 17DN164 T09 C~81Bw 2017 03 23.25214 10 00 12.61 +01 26 15.4 25.1i 17DN164 T09 C~81Bw 2017 03 23.27391 10 00 12.52 +01 26 16.0 25.0i 17DN164 T09 C~81Bw 2017 03 25.24634 10 00 05.12 +01 27 24.1 25.8r 17DN164 T09 C~81Bw 2017 03 25.26003 10 00 05.06 +01 27 24.9 25.3r 17DN164 T09 C~81Bw 2017 03 25.28747 10 00 04.95 +01 27 25.4 25.3r 17DN164 T09 C~81Bw 2017 03 29.26967 09 59 50.70 +01 29 41.9 25.9g 17DN164 T09 C~81Bw 2017 03 29.29181 09 59 50.61 +01 29 42.7 26.0g 17DN164 T09 C~81Bw 2017 03 29.29748 09 59 50.59 +01 29 43.0 26.4g 17DN164 T09 C~81Bw 2017 03 29.30574 09 59 50.56 +01 29 43.4 26.4g 17DN164 T09 C~81Bw 2017 03 29.31142 09 59 50.54 +01 29 43.2 26.0g 17DN164 T09 C~81Bw 2018 01 17.46122 10 10 49.10 +00 50 34.0 25.4i 17DN164 T09 C~81Bw 2018 01 17.46460 10 10 49.08 +00 50 33.8 25.9i 17DN164 T09 C~81Bw 2018 01 17.49135 10 10 48.98 +00 50 34.5 25.3i 17DN164 T09 C~81Bw 2018 01 17.51296 10 10 48.89 +00 50 35.0 25.1i 17DN164 T09 C~81Bw 2018 01 17.54803 10 10 48.75 +00 50 35.5 25.5i 17DN164 T09 C~81Bw 2018 01 17.57490 10 10 48.65 +00 50 36.0 25.2i 17DN164 T09 C~81Bw 2018 01 17.59901 10 10 48.55 +00 50 36.3 24.8i 17DN164 T09 C~81Bw
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 0.03
2 0.0001 -2.25 -0.04 0.02 -0.17
3 0.0133 -366.68 0.14 42.20 -0.02
4 0.0134 -368.36 -0.01 42.43 0.02
5 0.8845 8105.45 0.10 1488.46 -0.06
6 0.8846 8103.48 -0.13 1488.58 0.17
7 0.8847 8100.03 -0.36 1488.37 0.17
8 0.8896 7981.08 -0.06 1481.67 -0.21
9 0.8897 7978.93 0.08 1480.98 -0.78
10 0.8897 7978.24 0.32 1482.00 0.29
11 0.8899 7975.18 -0.15 1481.62 0.05
12 0.8901 7970.50 0.13 1481.70 0.40
13 0.8902 7967.65 0.08 1481.18 0.03
14 0.8902 7965.40 -0.10 1481.20 0.17
15 0.9174 7261.48 -0.03 1461.68 0.14
16 0.9176 7257.86 0.06 1461.52 0.02
17 0.9176 7257.01 0.05 1461.63 0.15
18 0.9744 5647.19 0.14 1509.28 -0.01
19 0.9748 5636.23 -0.09 1509.91 -0.02
20 0.9748 5635.14 -0.09 1509.83 -0.16
21 0.9749 5634.05 -0.08 1510.17 0.11
22 0.9749 5632.68 -0.05 1509.99 -0.16
23 0.9989 4945.57 0.10 1567.70 0.16
24 0.9991 4941.43 -0.04 1568.08 0.17
25 0.9995 4930.79 -0.17 1568.73 -0.17
26 0.9995 4929.63 0.36 1568.83 -0.22
27 1.0485 3632.55 0.10 1750.56 0.03
28 1.0487 3627.15 -0.10 1751.33 -0.12
29 1.0488 3625.78 -0.00 1752.00 0.29
30 1.0508 3575.46 -0.15 1761.32 0.00
31 1.0509 3573.99 -0.16 1761.41 -0.17
32 1.0563 3446.24 0.24 1786.75 -0.06
33 1.0563 3445.12 0.01 1787.19 0.21
34 1.0564 3443.40 0.08 1787.09 -0.24
35 1.0673 3195.56 0.13 1840.92 -0.00
36 1.0674 3194.01 -0.05 1841.20 -0.02
37 1.0674 3193.63 -0.09 1841.38 0.08
38 1.0674 3193.07 -0.14 1841.60 0.19
39 1.0674 3192.86 -0.00 1841.31 -0.18
40 1.8728 13289.09 0.06 3074.62 0.01
41 1.8728 13288.87 0.05 3074.33 -0.27
42 1.8729 13287.22 0.04 3074.46 -0.00
43 1.8729 13285.77 -0.07 3074.46 0.10
44 1.8730 13283.62 -0.06 3074.20 0.01
45 1.8731 13282.03 0.01 3074.14 0.09
46 1.8732 13280.52 -0.02 3073.90 -0.04
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.
17DN164 quality flag:2 Type: SCATEXTD SCATEXTD SCATNEAR axisobj 37.771 37.780 37.762 ecceobj 0.059 0.059 0.059 incobj 20.570 20.570 20.570 qmin 34.263 34.533 30.500 qmax 41.546 41.299 45.117 amean 37.779 37.788 37.592 amin 37.465 37.494 36.861 amax 38.081 38.100 38.174 emean 0.059 0.057 0.118 emin 0.029 0.029 0.025 emax 0.092 0.084 0.183 imean 21.189 21.144 20.666 imin 19.833 19.841 16.965 imax 22.896 22.826 22.686 excite_mean 0.367 0.365 0.374 fracstop 1.000 1.000 1.000 cjmean 2.883 2.885 2.873 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 181.0 180.0 180.8 kozaiamp 179.9 179.9 179.9