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: 17DY166 # Created Wed Jul 17 01:11:32 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 67 observations of 67 # Arc: 18.92y # First observation: 2000/05/05 # Last observation: 2019/04/06 # Chi-squared of fit: 22.43 DOF: 128 RMS: 0.10 # Min/Max residuals: -0.26 0.32 # Exact a, adot, b, bdot, g, gdot: 1.805330E-05 3.212105E-02 6.191721E-06 9.720940E-03 2.754984E-02 -5.054363E-03 # Covariance matrix: 4.6497E-13 -4.9191E-14 6.0606E-14 -9.7056E-15 -4.9115E-15 -3.2682E-14 -4.9191E-14 6.4600E-15 -1.0207E-14 1.6405E-15 2.6904E-15 5.5526E-15 6.0606E-14 -1.0207E-14 2.8213E-13 -1.9614E-14 -1.1163E-14 -1.1118E-14 -9.7056E-15 1.6405E-15 -1.9614E-14 1.5967E-15 1.9314E-15 1.8006E-15 -4.9115E-15 2.6904E-15 -1.1163E-14 1.9314E-15 4.5746E-14 7.1898E-15 -3.2682E-14 5.5526E-15 -1.1118E-14 1.8006E-15 7.1898E-15 6.1594E-15 # lat0 lon0 xBary yBary zBary JD0 -7.370134 155.335895 -0.951944 -0.045703 -0.351607 2451669.715270 # Heliocentric elements and errors Epoch: 2451670.5000 = 2000/05/06 Mean Anomaly: 351.04845 +/- 0.002 Argument of Peri: 0.17084 +/- 0.000 Long of Asc Node: 179.36867 +/- 0.000 Inclination: 18.47112 +/- 0.000 Eccentricity: 0.42088639 +/- 0.0000 Semi-Major Axis: 61.70414387 +/- 0.0001 Time of Perihelion: 2456072.6594 +/- 1.2 Perihelion: 35.73370968 +/- 0.0003 Aphelion: 87.67457805 +/- 0.0004 Period (y) 484.7075 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -33.42722582 +/- 0.0001 Ecliptic Y 14.30781153 +/- 0.0001 Ecliptic Z -4.65598798 +/- 0.0000 Ecliptic XDOT -0.00099845 +/- 0.0000 Ecliptic YDOT -0.00305063 +/- 0.0000 Ecliptic ZDOT 0.00102263 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 36.65756950 +/- 0.0001 Geocenter to KBO 36.29799672 +/- 0.0001 # Hcoef: 7.41
The following table shows the complete astrometric record for 17DY166. 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 (17DY166) followed by the observatory code and reference code for the source of the astrometry.
2000 05 05.214527 10 17 49.48 +02 41 22.9 23.1r 17DY166 645 C~85J0 2000 05 05.215357 10 17 49.47 +02 41 23.1 21.7i 17DY166 645 C~85J0 2000 05 05.217844 10 17 49.48 +02 41 23.1 23.5g 17DY166 645 C~85J0 2013 04 20.224715 12 02 53.16 +00 23 25.3 22.5z 17DY166 W84 C~85J0 2013 05 11.121066 12 01 41.43 +00 33 21.2 23.9g 17DY166 W84 C~85J0 2013 05 11.126357 12 01 41.41 +00 33 21.5 23.9g 17DY166 W84 C~85J0 2013 05 11.129007 12 01 41.40 +00 33 21.5 23.0r 17DY166 W84 C~85J0 2013 05 11.131643 12 01 41.39 +00 33 21.6 23.0r 17DY166 W84 C~85J0 2013 05 11.134302 12 01 41.39 +00 33 21.6 22.9r 17DY166 W84 C~85J0 2013 05 11.137516 12 01 41.38 +00 33 21.6 22.7i 17DY166 W84 C~85J0 2013 05 11.141309 12 01 41.37 +00 33 21.8 22.9i 17DY166 W84 C~85J0 2013 05 11.145127 12 01 41.36 +00 33 21.7 22.5i 17DY166 W84 C~85J0 2013 05 12.108897 12 01 38.84 +00 33 44.0 23.6g 17DY166 W84 C~85J0 2013 05 12.111549 12 01 38.83 +00 33 44.1 23.5g 17DY166 W84 C~85J0 2013 05 12.114192 12 01 38.82 +00 33 44.2 23.7g 17DY166 W84 C~85J0 2013 05 12.116864 12 01 38.82 +00 33 44.2 22.7r 17DY166 W84 C~85J0 2013 05 12.119523 12 01 38.80 +00 33 44.3 22.9r 17DY166 W84 C~85J0 2013 05 12.122175 12 01 38.80 +00 33 44.3 22.6r 17DY166 W84 C~85J0 2013 05 12.125392 12 01 38.79 +00 33 44.5 22.5i 17DY166 W84 C~85J0 2013 05 12.129222 12 01 38.78 +00 33 44.4 22.4i 17DY166 W84 C~85J0 2013 05 12.133033 12 01 38.76 +00 33 44.3 22.3i 17DY166 W84 C~85J0 2013 06 07.055649 12 01 02.13 +00 40 12.3 23.3g 17DY166 W84 C~85J0 2013 06 07.057431 12 01 02.12 +00 40 12.3 23.5g 17DY166 W84 C~85J0 2013 06 07.060180 12 01 02.12 +00 40 12.2 23.8g 17DY166 W84 C~85J0 2013 06 07.062929 12 01 02.12 +00 40 12.2 23.8g 17DY166 W84 C~85J0 2013 06 07.065690 12 01 02.12 +00 40 12.3 22.8r 17DY166 W84 C~85J0 2013 06 07.068442 12 01 02.12 +00 40 12.3 22.8r 17DY166 W84 C~85J0 2013 06 07.071197 12 01 02.12 +00 40 12.3 22.9r 17DY166 W84 C~85J0 2013 06 07.074529 12 01 02.12 +00 40 12.3 22.5i 17DY166 W84 C~85J0 2013 06 07.078460 12 01 02.12 +00 40 12.4 22.4i 17DY166 W84 C~85J0 2013 06 07.082315 12 01 02.11 +00 40 12.4 22.6i 17DY166 W84 C~85J0 2015 02 17.380060 12 24 04.20 -00 36 31.1 23.6g 17DY166 W84 C~85J0 2015 02 17.384021 12 24 04.19 -00 36 30.9 23.0g 17DY166 W84 C~85J0 2015 02 17.387979 12 24 04.17 -00 36 30.6 22.9r 17DY166 W84 C~85J0 2015 02 17.390617 12 24 04.16 -00 36 30.5 22.9r 17DY166 W84 C~85J0 2015 02 18.379247 12 24 00.63 -00 35 58.8 23.5g 17DY166 W84 C~85J0 2015 02 18.381885 12 24 00.62 -00 35 58.7 23.1g 17DY166 W84 C~85J0 2015 02 19.376474 12 23 57.00 -00 35 26.1 23.4g 17DY166 W84 C~85J0 2015 02 19.379120 12 23 56.99 -00 35 25.9 23.8g 17DY166 W84 C~85J0 2015 02 19.380435 12 23 56.98 -00 35 26.1 23.0r 17DY166 W84 C~85J0 2015 02 19.383076 12 23 56.97 -00 35 26.1 22.9r 17DY166 W84 C~85J0 2015 02 19.385075 12 23 56.96 -00 35 25.9 22.9r 17DY166 W84 C~85J0 2015 04 08.169607 12 20 17.86 -00 05 40.2 22.2z 17DY166 W84 C~85J0 2016 04 05.440296 12 28 41.45 -00 17 46.7 17DY166 T09 C~85J0 2016 04 05.564262 12 28 40.83 -00 17 42.1 17DY166 T09 C~85J0 2017 02 23.52726 12 40 01.63 -00 54 19.7 24.0r 17DY166 T09 C~85J0 2017 02 23.56764 12 40 01.48 -00 54 18.3 24.3r 17DY166 T09 C~85J0 2017 02 23.60167 12 40 01.34 -00 54 17.3 24.0r 17DY166 T09 C~85J0 2017 02 23.63983 12 40 01.21 -00 54 15.7 23.8r 17DY166 T09 C~85J0 2017 02 23.64192 12 40 01.21 -00 54 15.8 23.7r 17DY166 T09 C~85J0 2017 03 02.249708 12 39 35.41 -00 50 24.2 23.0g 17DY166 W84 C~85J0 2017 03 03.273368 12 39 31.18 -00 49 47.3 22.4r 17DY166 W84 C~85J0 2017 03 04.53892 12 39 25.87 -00 49 01.4 22.5y 17DY166 T09 C~85J0 2017 03 04.58243 12 39 25.69 -00 48 59.7 22.2y 17DY166 T09 C~85J0 2017 03 04.63107 12 39 25.48 -00 48 57.7 23.2y 17DY166 T09 C~85J0 2019 02 27.353615 12 56 04.24 -01 13 29.9 17DY166 309 C~85J0 2019 02 27.356905 12 56 04.26 -01 13 29.4 17DY166 309 C~85J0 2019 02 27.360195 12 56 04.25 -01 13 29.6 17DY166 309 C~85J0 2019 02 27.363485 12 56 04.22 -01 13 29.1 17DY166 309 C~85J0 2019 03 29.336535 12 53 53.06 -00 54 52.7 17DY166 T09 C~85J0 2019 04 03.477581 12 53 27.95 -00 51 37.4 17DY166 T09 C~85J0 2019 04 03.488340 12 53 27.90 -00 51 37.1 17DY166 T09 C~85J0 2019 04 04.520389 12 53 22.84 -00 50 58.2 17DY166 T09 C~85J0 2019 04 06.35011 12 53 13.89 -00 49 49.5 22.9i 17DY166 T09 C~85J0 2019 04 06.44937 12 53 13.40 -00 49 46.2 22.3i 17DY166 T09 C~85J0 2019 04 06.46047 12 53 13.34 -00 49 45.8 22.3i 17DY166 T09 C~85J0 2019 04 06.51511 12 53 13.07 -00 49 43.5 22.4i 17DY166 T09 C~85J0
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 0.03 0.00 -0.15
2 0.0000 0.00 -0.11 0.00 0.04
3 0.0000 0.00 0.06 0.00 -0.02
4 12.9583 0.00 0.02 0.00 0.01
5 13.0155 0.00 0.07 0.00 -0.05
6 13.0155 0.00 -0.02 0.00 0.13
7 13.0155 0.00 -0.06 0.00 0.07
8 13.0155 0.00 -0.10 0.00 0.11
9 13.0155 0.00 0.01 0.00 0.05
10 13.0155 0.00 -0.01 0.00 -0.03
11 13.0155 0.00 0.00 0.00 0.08
12 13.0156 0.00 0.01 0.00 -0.11
13 13.0182 0.00 0.10 0.00 -0.01
14 13.0182 0.00 0.06 0.00 0.03
15 13.0182 0.00 0.01 0.00 0.07
16 13.0182 0.00 0.12 0.00 0.01
17 13.0182 0.00 -0.07 0.00 0.05
18 13.0182 0.00 0.03 0.00 -0.01
19 13.0182 0.00 0.01 0.00 0.12
20 13.0182 0.00 0.01 0.00 -0.07
21 13.0183 0.00 -0.13 0.00 -0.26
22 13.0892 0.00 0.12 0.00 0.11
23 13.0892 0.00 -0.02 0.00 0.10
24 13.0892 0.00 -0.01 0.00 -0.02
25 13.0892 0.00 0.00 0.00 -0.04
26 13.0893 0.00 0.01 0.00 0.04
27 13.0893 0.00 0.02 0.00 0.03
28 13.0893 0.00 0.03 0.00 0.01
29 13.0893 0.00 0.04 0.00 -0.02
30 13.0893 0.00 0.06 0.00 0.06
31 13.0893 0.00 -0.08 0.00 0.03
32 14.7876 0.00 0.01 0.00 -0.21
33 14.7876 0.00 0.08 0.00 -0.13
34 14.7876 0.00 -0.01 0.00 0.04
35 14.7876 0.00 -0.02 0.00 0.05
36 14.7903 0.00 0.02 0.00 -0.10
37 14.7903 0.00 0.02 0.00 -0.08
38 14.7931 0.00 0.06 0.00 0.07
39 14.7931 0.00 0.05 0.00 0.19
40 14.7931 0.00 -0.02 0.00 -0.06
41 14.7931 0.00 -0.02 0.00 -0.14
42 14.7931 0.00 -0.06 0.00 -0.01
43 14.9239 0.00 0.02 0.00 0.00
44 15.9185 0.00 0.04 0.00 -0.02
45 15.9188 0.00 -0.10 0.00 -0.07
46 16.8058 0.00 -0.13 0.00 0.08
47 16.8059 0.00 -0.09 0.00 0.11
48 16.8060 0.00 -0.25 0.00 -0.05
49 16.8061 0.00 -0.04 0.00 0.25
50 16.8061 0.00 0.08 0.00 0.08
51 16.8242 0.00 -0.03 0.00 -0.03
52 16.8270 0.00 -0.07 0.00 -0.10
53 16.8305 0.00 -0.18 0.00 -0.07
54 16.8306 0.00 -0.06 0.00 0.04
55 16.8307 0.00 -0.07 0.00 0.26
56 18.8149 0.00 -0.20 0.00 -0.21
57 18.8149 0.00 0.28 0.00 0.17
58 18.8149 0.00 0.32 0.00 -0.14
59 18.8149 0.00 0.05 0.00 0.25
60 18.8970 0.00 0.12 0.00 -0.08
61 18.9111 0.00 -0.01 0.00 -0.02
62 18.9111 0.00 0.05 0.00 -0.12
63 18.9139 0.00 -0.00 0.00 -0.05
64 18.9189 0.00 -0.09 0.00 0.19
65 18.9192 0.00 -0.01 0.00 -0.21
66 18.9192 0.00 -0.08 0.00 -0.23
67 18.9194 0.00 -0.04 0.00 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.