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: 17EJ52 # Created Fri Nov 22 02:10:53 2024 # Orbit generated from Bernstein formalism # Fitting 22 observations of 22 # Arc: 2.28y # First observation: 2017/01/26 # Last observation: 2019/05/09 Preliminary a, adot, b, bdot, g, gdot: -0.000005 0.016640 0.000040 0.021201 0.025228 0.000000 # Chi-squared of fit: 13.12 DOF: 38 RMS: 0.14 # Min/Max residuals: -0.29 0.21 # Exact a, adot, b, bdot, g, gdot: 1.107636E-05 1.665173E-02 1.380266E-05 2.148982E-02 2.522586E-02 -1.153764E-03 # Covariance matrix: 1.6690E-13 3.7456E-14 -1.6566E-14 1.6616E-13 1.8902E-13 3.3505E-12 3.7456E-14 2.1617E-13 -3.9941E-14 3.8926E-13 2.5976E-13 7.6568E-12 -1.6566E-14 -3.9941E-14 1.2798E-13 -3.0825E-13 -5.0661E-14 -4.9081E-12 1.6616E-13 3.8926E-13 -3.0825E-13 2.5080E-12 5.0607E-13 4.6574E-11 1.8902E-13 2.5976E-13 -5.0661E-14 5.0607E-13 5.4234E-13 1.0169E-11 3.3505E-12 7.6568E-12 -4.9081E-12 4.6574E-11 1.0169E-11 8.9414E-10 # lat0 lon0 xBary yBary zBary JD0 -13.375297 151.306836 0.417893 -0.206436 -0.868946 2457780.035371 # Heliocentric elements and errors Epoch: 2457780.5000 = 2017/01/27 Mean Anomaly: 349.50619 +/- 0.236 Argument of Peri: 359.60882 +/- 0.365 Long of Asc Node: 160.72371 +/- 0.000 Inclination: 53.18690 +/- 0.001 Eccentricity: 0.20091029 +/- 0.0003 Semi-Major Axis: 50.37073265 +/- 0.0073 Time of Perihelion: 2461586.7434 +/- 85.5 Perihelion: 40.25073407 +/- 0.0161 Aphelion: 60.49073122 +/- 0.0173 Period (y) 357.4996 +/- 0.08 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -34.41720884 +/- 0.0010 Ecliptic Y 19.30750385 +/- 0.0005 Ecliptic Z -9.16977803 +/- 0.0003 Ecliptic XDOT -0.00123127 +/- 0.0000 Ecliptic YDOT -0.00139149 +/- 0.0000 Ecliptic ZDOT 0.00229801 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 40.51430363 +/- 0.0009 Geocenter to KBO 39.64185488 +/- 0.0012 # Hcoef: 8.17
The following table shows the complete astrometric record for 17EJ52. 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 (17EJ52) followed by the observatory code and reference code for the source of the astrometry.
2017 01 26.53457 09 54 28.16 -01 30 54.2 23.7z 17EJ52 T09 C~7zpr 2017 01 26.58033 09 54 27.95 -01 30 52.6 23.9z 17EJ52 T09 C~7zpr 2017 01 26.59379 09 54 27.88 -01 30 52.5 23.5z 17EJ52 T09 C~7zpr 2017 01 26.60454 09 54 27.85 -01 30 52.5 24.4z 17EJ52 T09 C~7zpr 2017 02 02.373291 09 53 56.82 -01 27 27.2 23.5r 17EJ52 T09 C~81Bz 2017 02 02.419471 09 53 56.60 -01 27 25.8 23.5r 17EJ52 T09 C~81Bz 2017 03 06.37214 09 51 25.24 -01 06 54.2 24.2i 17EJ52 T09 C~7zpr 2017 03 06.43229 09 51 24.95 -01 06 51.5 24.3i 17EJ52 T09 C~7zpr 2017 03 06.44111 09 51 24.90 -01 06 51.3 24.7i 17EJ52 T09 C~7zpr 2017 03 06.45254 09 51 24.86 -01 06 50.8 24.8i 17EJ52 T09 C~7zpr 2017 03 06.45793 09 51 24.84 -01 06 50.8 24.7i 17EJ52 T09 C~7zpr 2017 03 06.46334 09 51 24.81 -01 06 50.5 24.5i 17EJ52 T09 C~7zpr 2017 03 22.238164 09 50 19.61 -00 55 14.7 17EJ52 T09 C~81Bz 2017 03 22.245952 09 50 19.58 -00 55 14.5 17EJ52 T09 C~81Bz 2017 03 22.252233 09 50 19.55 -00 55 14.2 17EJ52 T09 C~81Bz 2018 01 17.499524 10 00 25.85 -00 45 45.3 23.6i 17EJ52 T09 C~81Bz 2018 01 17.609722 10 00 25.40 -00 45 42.6 23.8i 17EJ52 T09 C~81Bz 2019 05 09.252585 09 59 13.60 +01 13 43.5 23.7i 17EJ52 T09 C~81Bz 2019 05 09.280721 09 59 13.61 +01 13 44.4 17EJ52 T09 C~81Bz 2019 05 09.331772 09 59 13.59 +01 13 45.8 17EJ52 T09 C~81Bz 2019 05 09.353382 09 59 13.58 +01 13 46.5 17EJ52 T09 C~81Bz 2019 05 09.375023 09 59 13.58 +01 13 47.1 23.8i 17EJ52 T09 C~81Bz
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 -0.07
2 0.0001 -3.51 -0.25 0.40 0.20
3 0.0002 -4.53 -0.28 0.13 -0.11
4 0.0002 -4.95 0.10 -0.03 -0.29
5 0.0187 -512.64 0.18 29.93 0.04
6 0.0188 -516.22 0.21 30.09 -0.03
7 0.1063 -3073.47 0.06 391.49 0.20
8 0.1065 -3078.49 -0.19 392.50 0.21
9 0.1065 -3079.26 -0.26 392.42 -0.01
10 0.1066 -3080.00 -0.09 392.68 0.06
11 0.1066 -3080.28 0.05 392.58 -0.14
12 0.1066 -3080.81 -0.04 392.70 -0.10
13 0.1498 -4240.51 0.17 703.09 0.10
14 0.1498 -4241.00 0.21 703.12 -0.04
15 0.1498 -4241.53 0.12 703.25 -0.05
16 0.9746 4083.73 0.14 4411.01 -0.01
17 0.9749 4076.45 0.12 4411.18 0.07
18 2.2799 565.74 -0.09 10760.49 -0.02
19 2.2799 565.57 0.11 10761.39 0.12
20 2.2801 564.80 0.00 10762.60 -0.05
21 2.2801 564.41 -0.10 10763.21 -0.03
22 2.2802 564.20 -0.04 10763.77 -0.05
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.
17EJ52 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 50.349 50.372 50.327 ecceobj 0.198 0.199 0.198 incobj 53.327 53.329 53.324 qmin 38.946 38.957 38.930 qmax 62.053 62.104 61.963 amean 50.250 50.272 50.209 amin 49.804 49.834 49.751 amax 50.759 50.797 50.724 emean 0.207 0.207 0.207 emin 0.192 0.192 0.192 emax 0.222 0.223 0.222 imean 52.257 52.259 52.254 imin 52.003 51.994 51.992 imax 52.567 52.575 52.576 excite_mean 0.817 0.817 0.817 fracstop 1.000 1.000 1.000 cjmean 2.146 2.146 2.146 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 58.1 58.7 57.7 kozaiamp 180.0 180.0 180.0