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: 17EZ60 # Created Wed Mar 26 01:11:09 2025 # Orbit generated from Bernstein formalism # Fitting 33 observations of 33 # Arc: 3.21y # First observation: 2014/11/23 # Last observation: 2018/02/07 Preliminary a, adot, b, bdot, g, gdot: -0.000000 0.026698 0.000012 -0.004674 0.026923 0.000000 # Chi-squared of fit: 10.38 DOF: 60 RMS: 0.10 # Min/Max residuals: -0.28 0.18 # Exact a, adot, b, bdot, g, gdot: 1.509075E-05 2.610680E-02 -2.779806E-06 -4.602157E-03 2.624752E-02 -5.195473E-04 # Covariance matrix: 8.8391E-14 -8.7639E-14 -1.9719E-15 1.0439E-14 -4.2750E-14 -8.4682E-13 -8.7639E-14 1.8448E-12 7.5881E-14 -2.0753E-13 2.1440E-12 2.2960E-11 -1.9719E-15 7.5881E-14 8.8897E-14 -4.7724E-14 9.0604E-14 9.5353E-13 1.0439E-14 -2.0753E-13 -4.7724E-14 7.7625E-14 -1.9444E-13 -3.4530E-12 -4.2750E-14 2.1440E-12 9.0604E-14 -1.9444E-13 2.6971E-12 2.4770E-11 -8.4682E-13 2.2960E-11 9.5353E-13 -3.4530E-12 2.4770E-11 3.3042E-10 # lat0 lon0 xBary yBary zBary JD0 -17.873974 132.934850 0.940302 -0.092863 -0.288501 2456985.057108 # Heliocentric elements and errors Epoch: 2456980.5000 = 2014/11/19 Mean Anomaly: 268.99561 +/- 0.180 Argument of Peri: 336.53867 +/- 0.157 Long of Asc Node: 252.61738 +/- 0.001 Inclination: 20.48386 +/- 0.000 Eccentricity: 0.04439412 +/- 0.0007 Semi-Major Axis: 38.29684757 +/- 0.0066 Time of Perihelion: 2478863.2950 +/- 42.9 Perihelion: 36.59669258 +/- 0.0267 Aphelion: 39.99700256 +/- 0.0268 Period (y) 237.0024 +/- 0.06 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -24.22016860 +/- 0.0015 Ecliptic Y 27.40998843 +/- 0.0017 Ecliptic Z -11.69359563 +/- 0.0007 Ecliptic XDOT -0.00186245 +/- 0.0000 Ecliptic YDOT -0.00200557 +/- 0.0000 Ecliptic ZDOT -0.00044014 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 38.40135690 +/- 0.0016 Geocenter to KBO 38.09884053 +/- 0.0024 # Hcoef: 8.07
The following table shows the complete astrometric record for 17EZ60. 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 (17EZ60) followed by the observatory code and reference code for the source of the astrometry.
2014 11 23.55633 08 41 39.17 -00 15 13.7 23.8y 17EZ60 T09 C~8iff 2014 11 23.57562 08 41 39.13 -00 15 14.2 24.1y 17EZ60 T09 C~8iff 2014 11 23.59469 08 41 39.10 -00 15 14.5 23.3y 17EZ60 T09 C~8iff 2014 11 23.64985 08 41 39.01 -00 15 16.0 24.0y 17EZ60 T09 C~8iff 2014 11 24.53597 08 41 37.62 -00 15 37.5 24.1r 17EZ60 T09 C~8iff 2014 11 24.55101 08 41 37.59 -00 15 38.0 24.0r 17EZ60 T09 C~8iff 2014 11 24.55528 08 41 37.57 -00 15 38.2 24.5r 17EZ60 T09 C~8iff 2014 11 24.56600 08 41 37.56 -00 15 38.4 24.4r 17EZ60 T09 C~8iff 2014 11 25.54751 08 41 35.92 -00 16 01.7 24.6g 17EZ60 T09 C~8iff 2014 11 25.56322 08 41 35.89 -00 16 02.2 24.5g 17EZ60 T09 C~8iff 2014 11 25.57557 08 41 35.85 -00 16 02.4 24.6g 17EZ60 T09 C~8iff 2014 11 25.64469 08 41 35.75 -00 16 04.1 24.5g 17EZ60 T09 C~8iff 2014 11 28.49436 08 41 30.41 -00 17 08.9 23.4i 17EZ60 T09 C~8iff 2014 11 28.56126 08 41 30.26 -00 17 10.4 23.4i 17EZ60 T09 C~8iff 2014 11 28.58593 08 41 30.21 -00 17 10.8 23.6i 17EZ60 T09 C~8iff 2014 11 28.61057 08 41 30.16 -00 17 11.4 23.7i 17EZ60 T09 C~8iff 2016 01 15.51436 08 44 00.93 -01 02 43.9 23.5z 17EZ60 T09 C~8kvw 2016 01 15.51704 08 44 00.92 -01 02 43.7 23.6z 17EZ60 T09 C~8kvw 2016 01 15.53086 08 44 00.83 -01 02 43.7 23.5z 17EZ60 T09 C~8kvw 2016 01 15.54451 08 44 00.76 -01 02 43.5 23.7z 17EZ60 T09 C~8kvw 2017 01 23.31379 08 48 52.17 -01 41 34.2 24.2r 17EZ60 T09 C~8iff 2017 01 23.33550 08 48 52.05 -01 41 33.5 24.8r 17EZ60 T09 C~8iff 2017 01 23.34393 08 48 51.99 -01 41 33.3 24.2r 17EZ60 T09 C~8iff 2017 01 23.34604 08 48 51.99 -01 41 33.3 24.1r 17EZ60 T09 C~8iff 2017 03 06.23483 08 45 25.70 -01 24 52.4 23.7i 17EZ60 T09 C~8iff 2017 03 06.25430 08 45 25.62 -01 24 51.7 23.8i 17EZ60 T09 C~8iff 2017 03 06.28141 08 45 25.50 -01 24 51.0 23.3i 17EZ60 T09 C~8iff 2017 03 06.28412 08 45 25.50 -01 24 50.7 23.5i 17EZ60 T09 C~8iff 2017 03 06.29493 08 45 25.44 -01 24 50.4 23.6i 17EZ60 T09 C~8iff 2017 03 06.30857 08 45 25.39 -01 24 50.0 23.5i 17EZ60 T09 C~8iff 2017 03 06.32245 08 45 25.34 -01 24 49.7 23.4i 17EZ60 T09 C~8iff 2017 03 06.34763 08 45 25.23 -01 24 49.0 23.4i 17EZ60 T09 C~8iff 2018 02 07.238182 08 53 11.179 -02 17 43.22 22.4z 17EZ60 W84 C~8iff
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 0.13 0.00 0.00
2 0.0001 -0.44 0.01 -0.64 -0.06
3 0.0001 -0.79 -0.02 -1.05 0.11
4 0.0003 -1.69 0.01 -2.86 -0.02
5 0.0027 -15.93 0.04 -29.21 0.14
6 0.0027 -16.23 0.02 -29.81 -0.01
7 0.0027 -16.46 -0.14 -30.09 -0.15
8 0.0028 -16.55 -0.04 -30.32 -0.06
9 0.0055 -33.92 0.03 -59.41 0.11
10 0.0055 -34.22 0.05 -60.02 -0.02
11 0.0055 -34.74 -0.23 -60.37 -0.01
12 0.0057 -35.72 0.16 -62.41 0.03
13 0.0135 -95.27 0.06 -146.49 -0.02
14 0.0137 -97.03 -0.07 -148.55 -0.09
15 0.0138 -97.64 -0.08 -149.14 0.05
16 0.0138 -98.20 -0.03 -149.92 -0.00
17 1.1443 2819.16 0.17 -2167.81 -0.07
18 1.1443 2818.96 0.18 -2167.66 0.11
19 1.1444 2817.66 -0.05 -2168.02 -0.07
20 1.1444 2816.60 -0.07 -2168.11 0.01
21 2.1677 7658.14 0.18 -3230.44 -0.28
22 2.1678 7656.22 0.00 -3230.26 0.09
23 2.1678 7655.30 -0.24 -3230.31 0.11
24 2.1678 7655.30 -0.07 -3230.31 0.13
25 2.2825 4403.39 0.04 -3102.92 -0.02
26 2.2825 4402.05 0.02 -3102.57 0.07
27 2.2826 4400.12 -0.05 -3102.38 -0.10
28 2.2826 4400.04 0.05 -3102.09 0.15
29 2.2827 4399.09 -0.16 -3102.04 0.06
30 2.2827 4398.26 -0.06 -3101.86 0.06
31 2.2827 4397.46 0.08 -3101.78 -0.04
32 2.2828 4395.68 0.03 -3101.55 -0.14
33 3.2079 11993.67 0.05 -4273.22 -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.
17EZ60 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 38.159 38.174 38.144 ecceobj 0.041 0.042 0.040 incobj 20.454 20.455 20.454 qmin 35.610 35.280 35.654 qmax 40.810 41.175 40.760 amean 38.119 38.139 38.105 amin 37.832 37.839 37.817 amax 38.409 38.439 38.402 emean 0.046 0.047 0.047 emin 0.032 0.030 0.032 emax 0.064 0.072 0.062 imean 22.465 22.456 22.477 imin 21.280 21.223 21.302 imax 23.341 23.302 23.347 excite_mean 0.385 0.385 0.385 fracstop 1.000 1.000 1.000 cjmean 2.865 2.866 2.865 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 174.4 177.0 177.9 kozaiamp 180.0 179.9 179.9