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: 17EY49 # Created Sun Oct 19 01:11:47 2025 # Orbit generated from Bernstein formalism # Fitting 112 observations of 112 # Arc: 2.02y # First observation: 2016/01/09 # Last observation: 2018/01/17 Preliminary a, adot, b, bdot, g, gdot: -0.000064 0.027279 -0.000003 0.001970 0.026279 0.000000 # Chi-squared of fit: 54.41 DOF: 218 RMS: 0.12 # Min/Max residuals: -0.35 0.39 # Exact a, adot, b, bdot, g, gdot: 1.595099E-05 2.693440E-02 1.455681E-06 1.948446E-03 2.601270E-02 -4.862063E-03 # Covariance matrix: 1.7774E-13 -2.5788E-13 2.6823E-15 -1.0091E-14 -1.0364E-13 -3.0943E-12 -2.5788E-13 8.1673E-13 -9.7160E-15 4.7074E-14 6.0974E-13 1.3932E-11 2.6823E-15 -9.7160E-15 1.3588E-13 -1.1228E-13 -7.0750E-15 -2.0332E-13 -1.0091E-14 4.7074E-14 -1.1228E-13 1.0452E-13 3.9318E-14 9.2627E-13 -1.0364E-13 6.0974E-13 -7.0750E-15 3.9318E-14 5.5626E-13 1.1450E-11 -3.0943E-12 1.3932E-11 -2.0332E-13 9.2627E-13 1.1450E-11 2.7632E-10 # lat0 lon0 xBary yBary zBary JD0 -10.089952 151.145133 0.668878 -0.126167 -0.710080 2457397.101809 # Heliocentric elements and errors Epoch: 2457390.5000 = 2016/01/03 Mean Anomaly: 310.48052 +/- 0.025 Argument of Peri: 4.11979 +/- 0.055 Long of Asc Node: 218.04950 +/- 0.003 Inclination: 10.67136 +/- 0.000 Eccentricity: 0.22157890 +/- 0.0006 Semi-Major Axis: 43.94870012 +/- 0.0141 Time of Perihelion: 2472028.8142 +/- 2.2 Perihelion: 34.21059543 +/- 0.0299 Aphelion: 53.68680481 +/- 0.0327 Period (y) 291.3582 +/- 0.14 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -33.46206594 +/- 0.0010 Ecliptic Y 19.19714657 +/- 0.0005 Ecliptic Z -6.73491219 +/- 0.0002 Ecliptic XDOT -0.00095905 +/- 0.0000 Ecliptic YDOT -0.00271562 +/- 0.0000 Ecliptic ZDOT 0.00029158 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 39.16119681 +/- 0.0009 Geocenter to KBO 38.44275616 +/- 0.0011 # Hcoef: 8.53
The following table shows the complete astrometric record for 17EY49. 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 (17EY49) followed by the observatory code and reference code for the source of the astrometry.
2016 01 09.60102 09 58 27.53 +01 37 09.4 24.1y 17EY49 T09 C~93TA 2016 01 09.63088 09 58 27.41 +01 37 09.8 24.0y 17EY49 T09 C~93TA 2016 01 09.64511 09 58 27.36 +01 37 09.9 24.0y 17EY49 T09 C~93TA 2016 01 09.65944 09 58 27.30 +01 37 10.1 23.9y 17EY49 T09 C~93TA 2016 01 15.60638 09 58 04.79 +01 38 15.8 24.8z 17EY49 T09 C~93TA 2016 01 15.64109 09 58 04.66 +01 38 16.3 23.9z 17EY49 T09 C~93TA 2016 01 15.64496 09 58 04.63 +01 38 16.7 24.1z 17EY49 T09 C~93TA 2016 01 15.65653 09 58 04.59 +01 38 16.5 24.7z 17EY49 T09 C~93TA 2016 12 25.51821 10 05 08.92 +01 09 51.1 25.3r 17EY49 T09 C~7gv6 2016 12 25.59402 10 05 08.73 +01 09 50.9 25.0i 17EY49 T09 C~7gv6 2016 12 25.61625 10 05 08.66 +01 09 50.9 24.3i 17EY49 T09 C~7gv6 2017 01 21.44099 10 03 37.64 +01 13 32.3 23.6z 17EY49 T09 C~7gv6 2017 01 21.48580 10 03 37.45 +01 13 33.0 23.8z 17EY49 T09 C~7gv6 2017 01 21.51187 10 03 37.33 +01 13 33.5 23.9z 17EY49 T09 C~7gv6 2017 01 21.56003 10 03 37.12 +01 13 34.4 23.8z 17EY49 T09 C~7gv6 2017 01 23.36273 10 03 29.41 +01 14 04.2 24.6r 17EY49 T09 C~7gv6 2017 01 23.39642 10 03 29.24 +01 14 04.9 24.8r 17EY49 T09 C~7gv6 2017 01 23.41024 10 03 29.17 +01 14 05.2 24.3r 17EY49 T09 C~7gv6 2017 01 23.52068 10 03 28.70 +01 14 07.1 24.1i 17EY49 T09 C~7gv6 2017 01 23.56169 10 03 28.51 +01 14 07.9 24.0i 17EY49 T09 C~7gv6 2017 01 30.43912 10 02 57.62 +01 16 18.2 24.2i 17EY49 T09 C~7gv6 2017 01 30.46126 10 02 57.52 +01 16 18.7 24.0i 17EY49 T09 C~7gv6 2017 01 30.53141 10 02 57.21 +01 16 20.3 23.9z 17EY49 T09 C~7gv6 2017 01 30.56834 10 02 57.02 +01 16 20.9 24.0z 17EY49 T09 C~7gv6 2017 01 30.59415 10 02 56.90 +01 16 21.4 24.7z 17EY49 T09 C~7gv6 2017 01 30.61597 10 02 56.79 +01 16 21.9 24.1z 17EY49 T09 C~7gv6 2017 02 03.197850 10 02 40.018 +01 17 39.48 24.4r 17EY49 W84 C~8HKi 2017 02 21.32753 10 01 11.66 +01 25 28.3 23.7z 17EY49 T09 C~7gv6 2017 02 21.33887 10 01 11.62 +01 25 28.6 24.1z 17EY49 T09 C~7gv6 2017 02 21.35310 10 01 11.55 +01 25 29.3 24.1z 17EY49 T09 C~7gv6 2017 02 21.37870 10 01 11.42 +01 25 29.8 23.4z 17EY49 T09 C~7gv6 2017 02 21.38619 10 01 11.37 +01 25 30.0 23.7z 17EY49 T09 C~7gv6 2017 02 21.40442 10 01 11.28 +01 25 30.6 23.4z 17EY49 T09 C~7gv6 2017 02 21.42640 10 01 11.18 +01 25 31.2 24.1z 17EY49 T09 C~7gv6 2017 02 23.32237 10 01 01.88 +01 26 26.5 25.2g 17EY49 T09 C~7gv6 2017 02 23.45915 10 01 01.22 +01 26 30.3 24.8r 17EY49 T09 C~7gv6 2017 02 23.46966 10 01 01.17 +01 26 30.7 24.5r 17EY49 T09 C~7gv6 2017 02 23.47280 10 01 01.15 +01 26 30.8 24.5r 17EY49 T09 C~7gv6 2017 02 23.48331 10 01 01.09 +01 26 31.2 24.5r 17EY49 T09 C~7gv6 2017 02 23.49694 10 01 01.02 +01 26 31.5 24.7r 17EY49 T09 C~7gv6 2017 02 23.50391 10 01 00.99 +01 26 31.7 24.5r 17EY49 T09 C~7gv6 2017 02 23.51437 10 01 00.94 +01 26 32.0 24.5r 17EY49 T09 C~7gv6 2017 02 25.31757 10 00 52.17 +01 27 25.6 24.4i 17EY49 T09 C~7gv6 2017 02 25.33548 10 00 52.06 +01 27 26.0 24.4i 17EY49 T09 C~7gv6 2017 02 25.36128 10 00 51.93 +01 27 26.3 24.5i 17EY49 T09 C~7gv6 2017 02 25.43480 10 00 51.59 +01 27 28.6 23.8i 17EY49 T09 C~7gv6 2017 03 04.27055 10 00 18.82 +01 30 57.0 24.0z 17EY49 T09 C~7gv6 2017 03 04.27420 10 00 18.82 +01 30 56.9 24.2z 17EY49 T09 C~7gv6 2017 03 04.27802 10 00 18.79 +01 30 57.0 23.9z 17EY49 T09 C~7gv6 2017 03 04.28185 10 00 18.77 +01 30 57.4 24.1z 17EY49 T09 C~7gv6 2017 03 04.29967 10 00 18.68 +01 30 58.0 23.9z 17EY49 T09 C~7gv6 2017 03 04.30350 10 00 18.68 +01 30 58.0 24.0z 17EY49 T09 C~7gv6 2017 03 04.30733 10 00 18.65 +01 30 58.0 24.0z 17EY49 T09 C~7gv6 2017 03 04.32520 10 00 18.55 +01 30 58.4 24.7z 17EY49 T09 C~7gv6 2017 03 04.32902 10 00 18.55 +01 30 58.7 24.3z 17EY49 T09 C~7gv6 2017 03 04.33285 10 00 18.52 +01 30 59.0 23.9z 17EY49 T09 C~7gv6 2017 03 04.34360 10 00 18.47 +01 30 59.4 23.8z 17EY49 T09 C~7gv6 2017 03 04.35463 10 00 18.41 +01 30 59.7 24.2z 17EY49 T09 C~7gv6 2017 03 04.44130 10 00 18.00 +01 31 02.2 23.8i 17EY49 T09 C~7gv6 2017 03 04.44514 10 00 17.99 +01 31 02.4 23.8i 17EY49 T09 C~7gv6 2017 03 04.45958 10 00 17.92 +01 31 02.7 24.0i 17EY49 T09 C~7gv6 2017 03 04.46328 10 00 17.91 +01 31 02.9 24.2i 17EY49 T09 C~7gv6 2017 03 04.46710 10 00 17.88 +01 31 02.9 24.0i 17EY49 T09 C~7gv6 2017 03 04.48885 10 00 17.76 +01 31 03.6 24.0i 17EY49 T09 C~7gv6 2017 03 06.49634 10 00 08.39 +01 32 06.4 24.4r 17EY49 T09 C~7gv6 2017 03 06.50700 10 00 08.33 +01 32 06.6 24.3r 17EY49 T09 C~7gv6 2017 03 06.51829 10 00 08.29 +01 32 06.9 24.9r 17EY49 T09 C~7gv6 2017 03 06.53219 10 00 08.22 +01 32 07.6 24.8r 17EY49 T09 C~7gv6 2017 03 07.40341 10 00 04.21 +01 32 34.7 23.4y 17EY49 T09 C~7gv6 2017 03 07.41785 10 00 04.14 +01 32 35.0 23.8y 17EY49 T09 C~7gv6 2017 03 07.44816 10 00 04.01 +01 32 36.2 23.4y 17EY49 T09 C~7gv6 2017 03 07.48499 10 00 03.83 +01 32 37.2 23.5y 17EY49 T09 C~7gv6 2017 03 07.49268 10 00 03.79 +01 32 37.5 23.9y 17EY49 T09 C~7gv6 2017 03 07.50339 10 00 03.74 +01 32 38.2 24.4y 17EY49 T09 C~7gv6 2017 03 07.52948 10 00 03.63 +01 32 38.5 23.7y 17EY49 T09 C~7gv6 2017 03 22.39100 09 58 59.87 +01 40 29.4 23.8z 17EY49 T09 C~7gv6 2017 03 22.39826 09 58 59.85 +01 40 29.4 23.9z 17EY49 T09 C~7gv6 2017 03 22.40209 09 58 59.82 +01 40 29.6 23.9z 17EY49 T09 C~7gv6 2017 03 22.40595 09 58 59.81 +01 40 29.8 23.8z 17EY49 T09 C~7gv6 2017 03 22.41670 09 58 59.75 +01 40 30.1 24.1z 17EY49 T09 C~7gv6 2017 03 22.42393 09 58 59.76 +01 40 30.5 23.9z 17EY49 T09 C~7gv6 2017 03 22.42777 09 58 59.72 +01 40 30.5 24.2z 17EY49 T09 C~7gv6 2017 03 22.43161 09 58 59.71 +01 40 30.6 23.8z 17EY49 T09 C~7gv6 2017 03 22.44235 09 58 59.67 +01 40 31.0 24.2z 17EY49 T09 C~7gv6 2017 03 22.44958 09 58 59.64 +01 40 31.3 24.0z 17EY49 T09 C~7gv6 2017 03 22.45341 09 58 59.62 +01 40 31.5 23.8z 17EY49 T09 C~7gv6 2017 03 22.45726 09 58 59.61 +01 40 31.5 23.9z 17EY49 T09 C~7gv6 2017 03 22.46802 09 58 59.57 +01 40 31.8 23.8z 17EY49 T09 C~7gv6 2017 03 22.48979 09 58 59.47 +01 40 32.5 24.0z 17EY49 T09 C~7gv6 2017 03 23.089577 09 58 57.149 +01 40 51.60 24.6V 17EY49 W84 C~8HKi 2017 03 23.25214 09 58 56.54 +01 40 56.5 24.3i 17EY49 T09 C~7n3e 2017 03 23.26317 09 58 56.50 +01 40 57.0 24.7i 17EY49 T09 C~7n3e 2017 03 23.27391 09 58 56.45 +01 40 57.3 24.7i 17EY49 T09 C~7n3e 2017 03 23.28109 09 58 56.43 +01 40 57.5 24.3i 17EY49 T09 C~7n3e 2017 03 23.28492 09 58 56.40 +01 40 57.6 24.6i 17EY49 T09 C~7n3e 2017 03 25.24634 09 58 48.96 +01 41 59.3 25.0r 17EY49 T09 C~7gv6 2017 03 25.26003 09 58 48.89 +01 41 59.4 24.6r 17EY49 T09 C~7gv6 2017 03 25.26562 09 58 48.88 +01 41 59.9 24.6r 17EY49 T09 C~7gv6 2017 03 25.27375 09 58 48.84 +01 42 00.3 25.0r 17EY49 T09 C~7gv6 2017 03 25.27935 09 58 48.83 +01 42 00.3 24.6r 17EY49 T09 C~7gv6 2017 03 25.28747 09 58 48.79 +01 42 00.3 24.9r 17EY49 T09 C~7gv6 2017 03 30.25533 09 58 31.01 +01 44 34.6 25.2i 17EY49 T09 C~7xU6 2017 03 30.26317 09 58 30.99 +01 44 34.6 25.0i 17EY49 T09 C~7xU6 2017 03 30.26700 09 58 30.96 +01 44 34.9 25.0i 17EY49 T09 C~7xU6 2017 03 30.27083 09 58 30.95 +01 44 34.9 25.2i 17EY49 T09 C~7xU6 2017 03 30.28239 09 58 30.91 +01 44 35.2 25.4i 17EY49 T09 C~7xU6 2017 03 30.29005 09 58 30.88 +01 44 35.6 25.4i 17EY49 T09 C~7xU6 2018 01 17.46122 10 09 58.19 +00 45 51.9 24.2i 17EY49 T09 C~7ujL 2018 01 17.49135 10 09 58.07 +00 45 52.4 24.0i 17EY49 T09 C~7ujL 2018 01 17.51296 10 09 58.00 +00 45 52.6 24.0i 17EY49 T09 C~7ujL 2018 01 17.57490 10 09 57.74 +00 45 53.4 24.0i 17EY49 T09 C~7ujL 2018 01 17.59901 10 09 57.63 +00 45 53.6 24.7i 17EY49 T09 C~7ujL
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 0.09 0.00 -0.06
2 0.0001 -1.83 -0.10 -0.25 0.01
3 0.0001 -2.56 -0.06 -0.42 -0.01
4 0.0002 -3.48 -0.18 -0.55 0.01
5 0.0164 -342.73 0.07 -56.59 -0.07
6 0.0165 -344.73 0.19 -56.80 0.03
7 0.0165 -345.29 -0.13 -56.58 0.29
8 0.0166 -345.78 0.08 -56.98 -0.00
9 0.9608 6214.33 0.10 564.74 0.20
10 0.9610 6211.73 0.12 563.56 0.00
11 0.9610 6210.74 -0.09 563.19 -0.08
12 1.0345 4853.34 0.02 293.97 -0.15
13 1.0346 4850.43 0.09 293.63 -0.15
14 1.0347 4848.56 -0.04 293.47 -0.11
15 1.0348 4845.30 -0.09 293.21 -0.00
16 1.0397 4726.48 0.19 280.78 -0.09
17 1.0398 4723.85 -0.16 280.54 -0.09
18 1.0399 4722.76 -0.31 280.46 -0.08
19 1.0402 4715.48 -0.04 279.78 0.02
20 1.0403 4712.53 -0.19 279.53 0.07
21 1.0591 4232.72 -0.10 239.94 -0.15
22 1.0592 4231.14 -0.05 239.89 -0.08
23 1.0594 4226.22 0.19 239.77 0.16
24 1.0595 4223.34 0.02 239.33 -0.07
25 1.0595 4221.48 0.05 239.17 -0.10
26 1.0596 4219.76 -0.07 239.07 -0.09
27 1.0694 3956.88 -0.13 223.99 -0.06
28 1.1190 2551.22 -0.10 201.05 -0.10
29 1.1191 2550.55 0.14 201.12 -0.04
30 1.1191 2549.32 0.06 201.41 0.24
31 1.1192 2547.32 0.11 201.20 0.01
32 1.1192 2546.55 -0.06 201.12 -0.07
33 1.1192 2545.07 -0.07 201.21 0.00
34 1.1193 2543.46 0.08 201.25 0.02
35 1.1245 2393.45 -0.20 204.43 0.09
36 1.1249 2382.85 0.16 204.54 -0.01
37 1.1249 2382.01 0.16 204.66 0.09
38 1.1249 2381.69 0.10 204.64 0.08
39 1.1249 2380.71 -0.04 204.71 0.12
40 1.1250 2379.62 -0.04 204.62 0.02
41 1.1250 2379.13 0.03 204.65 0.04
42 1.1250 2378.32 0.06 204.67 0.04
43 1.1300 2236.36 0.09 209.03 0.34
44 1.1300 2234.67 -0.17 208.83 0.10
45 1.1301 2232.74 -0.04 208.43 -0.35
46 1.1303 2227.16 0.26 208.81 -0.12
47 1.1490 1693.90 -0.02 232.75 0.05
48 1.1490 1693.93 0.30 232.65 -0.06
49 1.1490 1693.48 0.14 232.59 -0.14
50 1.1490 1693.06 0.02 232.86 0.12
51 1.1491 1691.58 -0.07 232.95 0.14
52 1.1491 1691.58 0.23 232.95 0.12
53 1.1491 1691.16 0.11 232.79 -0.05
54 1.1491 1689.61 -0.04 232.65 -0.27
55 1.1492 1689.51 0.16 232.93 -0.01
56 1.1492 1688.98 -0.07 233.05 0.10
57 1.1492 1688.14 -0.07 233.17 0.17
58 1.1492 1687.19 -0.16 233.13 0.10
59 1.1495 1680.56 -0.01 233.33 -0.05
60 1.1495 1680.35 0.08 233.47 0.07
61 1.1495 1679.26 0.12 233.38 -0.07
62 1.1495 1679.05 0.20 233.52 0.05
63 1.1495 1678.63 0.07 233.36 -0.13
64 1.1496 1676.70 -0.16 233.39 -0.18
65 1.1551 1523.11 -0.11 243.25 0.11
66 1.1551 1522.20 -0.20 243.12 -0.07
67 1.1551 1521.53 0.01 243.20 -0.05
68 1.1552 1520.30 -0.15 243.49 0.18
69 1.1576 1454.49 0.04 247.92 0.05
70 1.1576 1453.40 0.06 247.83 -0.11
71 1.1577 1451.16 0.15 248.28 0.19
72 1.1578 1448.28 0.10 248.27 0.01
73 1.1578 1447.61 0.02 248.35 0.04
74 1.1578 1446.67 -0.10 248.74 0.39
75 1.1579 1445.02 0.24 248.45 -0.04
76 1.1986 384.78 -0.09 356.48 -0.01
77 1.1986 384.50 0.12 356.37 -0.18
78 1.1986 384.01 -0.12 356.40 -0.18
79 1.1986 383.80 -0.07 356.54 -0.08
80 1.1987 382.85 -0.29 356.50 -0.21
81 1.1987 382.85 0.20 356.93 0.16
82 1.1987 382.29 -0.11 356.72 -0.09
83 1.1987 382.11 -0.03 356.76 -0.08
84 1.1987 381.41 -0.01 356.93 -0.01
85 1.1988 380.88 -0.05 357.05 0.06
86 1.1988 380.53 -0.14 357.14 0.10
87 1.1988 380.39 -0.03 357.08 0.02
88 1.1988 379.73 0.03 357.16 -0.00
89 1.1989 378.08 -0.17 357.29 -0.06
90 1.2005 338.80 -0.15 363.06 -0.07
91 1.2010 328.53 0.05 364.47 -0.02
92 1.2010 327.80 0.05 364.73 0.14
93 1.2010 326.99 -0.05 364.75 0.06
94 1.2010 326.64 0.08 364.83 0.08
95 1.2011 326.18 -0.12 364.77 -0.02
96 1.2064 200.12 0.11 383.72 0.16
97 1.2065 199.10 -0.02 383.44 -0.24
98 1.2065 198.79 0.02 383.86 0.12
99 1.2065 198.09 -0.15 384.03 0.21
100 1.2065 197.95 0.07 383.97 0.11
101 1.2065 197.38 0.03 383.76 -0.18
102 1.2201 -106.26 -0.00 435.47 0.06
103 1.2202 -106.54 0.18 435.37 -0.13
104 1.2202 -107.07 -0.11 435.49 -0.05
105 1.2202 -107.21 -0.02 435.44 -0.14
106 1.2202 -107.88 0.00 435.51 -0.19
107 1.2202 -108.44 -0.10 435.73 -0.05
108 2.0229 10790.16 -0.08 732.37 0.03
109 2.0230 10788.30 -0.09 732.21 0.13
110 2.0230 10787.24 0.18 732.03 0.13
111 2.0232 10783.30 0.05 731.41 0.05
112 2.0233 10781.68 -0.09 731.02 -0.13
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.
17EY49 quality flag:3 Type: 7:4EEE 7:4EEE 7:4EEE axisobj 43.599 43.629 43.569 ecceobj 0.215 0.217 0.214 incobj 10.679 10.679 10.679 qmin 33.436 33.025 33.660 qmax 54.572 55.125 54.402 amean 43.726 43.726 43.726 amin 43.253 43.254 43.233 amax 44.272 44.280 44.275 emean 0.203 0.206 0.200 emin 0.158 0.150 0.162 emax 0.234 0.245 0.230 imean 12.651 12.389 12.969 imin 10.956 10.702 11.283 imax 14.815 15.065 14.279 excite_mean 0.300 0.299 0.301 fracstop 1.000 1.000 1.000 cjmean 2.990 2.990 2.989 libcent 0 178.5 175.2 185.5 libamp 0 134.0 125.0 129.1 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 149.6 177.1 151.0 kozaiamp 180.0 180.0 179.9