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: 17EW51 # Created Wed May 8 01:18:07 2024 # Orbit generated from Bernstein formalism # Fitting 16 observations of 16 # Arc: 60.92d # First observation: 2017/01/23 # Last observation: 2017/03/25 Preliminary a, adot, b, bdot, g, gdot: -0.000013 0.030969 0.000005 0.005129 0.026950 0.000000 # Chi-squared of fit: 5.90 DOF: 26 RMS: 0.11 # Min/Max residuals: -0.25 0.18 # Exact a, adot, b, bdot, g, gdot: 1.531744E-05 2.630742E-02 3.098458E-06 5.140250E-03 2.618547E-02 -1.876082E-04 # Covariance matrix: 5.0267E-13 2.0068E-11 2.6122E-14 7.6419E-14 4.3585E-12 1.5671E-10 2.0068E-11 3.8746E-08 4.5422E-11 -1.6530E-10 6.0805E-09 -8.4821E-08 2.6122E-14 4.5422E-11 4.8821E-13 -3.1005E-12 7.1213E-12 -1.0265E-10 7.6419E-14 -1.6530E-10 -3.1005E-12 2.5837E-11 -2.3536E-11 1.0295E-09 4.3585E-12 6.0805E-09 7.1213E-12 -2.3536E-11 9.6525E-10 -1.0446E-08 1.5671E-10 -8.4821E-08 -1.0265E-10 1.0295E-09 -1.0446E-08 9.7764E-07 # lat0 lon0 xBary yBary zBary JD0 -10.620173 152.516943 0.485550 -0.157966 -0.843465 2457776.869321 # Heliocentric elements and errors Epoch: 2457770.5000 = 2017/01/17 Mean Anomaly: 334.02247 +/- 37.311 Argument of Peri: 344.16161 +/- 41.320 Long of Asc Node: 194.94044 +/- 0.208 Inclination: 15.00619 +/- 0.056 Eccentricity: 0.04436280 +/- 0.0238 Semi-Major Axis: 40.64174067 +/- 0.4464 Time of Perihelion: 2464599.4241 +/- 9807.5 Perihelion: 38.83875906 +/- 1.0560 Aphelion: 42.44472227 +/- 1.0727 Period (y) 259.0995 +/- 4.27 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -33.83986528 +/- 0.0395 Ecliptic Y 18.14404346 +/- 0.0206 Ecliptic Z -7.03807337 +/- 0.0084 Ecliptic XDOT -0.00133730 +/- 0.0001 Ecliptic YDOT -0.00241008 +/- 0.0001 Ecliptic ZDOT 0.00053179 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 39.03687067 +/- 0.0356 Geocenter to KBO 38.18911888 +/- 0.0453 # Hcoef: 8.35
The following table shows the complete astrometric record for 17EW51. 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 (17EW51) followed by the observatory code and reference code for the source of the astrometry.
2017 01 23.36852 10 02 46.25 +00 38 58.0 24.4r 17EW51 T09 C~7xU7 2017 01 23.44815 10 02 45.89 +00 38 59.6 24.6r 17EW51 T09 C~7xU7 2017 01 23.52648 10 02 45.54 +00 39 00.9 23.9i 17EW51 T09 C~7xU7 2017 03 04.31803 09 59 36.25 +00 56 55.3 23.7z 17EW51 T09 C~7xU7 2017 03 04.34360 09 59 36.14 +00 56 56.0 23.6z 17EW51 T09 C~7xU7 2017 03 04.47782 09 59 35.49 +00 57 00.3 24.2i 17EW51 T09 C~7xU7 2017 03 04.49952 09 59 35.39 +00 57 00.8 23.8i 17EW51 T09 C~7xU7 2017 03 22.39100 09 58 18.11 +01 07 02.1 23.7z 17EW51 T09 C~7xU7 2017 03 22.41670 09 58 18.01 +01 07 02.8 23.9z 17EW51 T09 C~7xU7 2017 03 22.44235 09 58 17.89 +01 07 04.0 23.9z 17EW51 T09 C~7xU7 2017 03 22.46802 09 58 17.80 +01 07 04.8 23.9z 17EW51 T09 C~7xU7 2017 03 22.48979 09 58 17.72 +01 07 05.6 23.6z 17EW51 T09 C~7xU7 2017 03 25.24634 09 58 07.29 +01 08 38.0 24.6r 17EW51 T09 C~7xU7 2017 03 25.26003 09 58 07.22 +01 08 38.4 24.5r 17EW51 T09 C~7xU7 2017 03 25.27375 09 58 07.18 +01 08 39.0 24.4r 17EW51 T09 C~7xU7 2017 03 25.28747 09 58 07.12 +01 08 39.4 25.0r 17EW51 T09 C~7xU7
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 0.12 0.00 0.00
2 0.0002 -5.62 -0.06 -0.41 0.07
3 0.0004 -10.99 -0.06 -1.04 -0.08
4 0.1094 -3046.77 -0.13 2.57 0.18
5 0.1094 -3048.56 0.09 2.64 0.11
6 0.1098 -3059.20 -0.02 3.22 -0.05
7 0.1099 -3060.78 0.10 3.16 -0.23
8 0.1589 -4357.81 0.04 157.10 -0.03
9 0.1589 -4359.46 0.13 157.22 -0.17
10 0.1590 -4361.57 -0.25 157.71 0.05
11 0.1591 -4363.12 -0.07 157.98 0.05
12 0.1591 -4364.52 -0.01 158.31 0.14
13 0.1667 -4543.56 0.17 189.63 0.03
14 0.1667 -4544.69 -0.06 189.63 -0.12
15 0.1667 -4545.46 0.06 189.98 0.08
16 0.1668 -4546.44 -0.04 190.04 -0.02
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.
17EW51 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 40.494 41.956 39.230 ecceobj 0.038 0.098 0.005 incobj 15.050 14.884 15.233 qmin 38.069 36.919 37.668 qmax 43.077 47.266 41.011 amean 40.501 41.991 39.246 amin 40.192 41.644 38.944 amax 40.811 42.357 39.546 emean 0.039 0.100 0.017 emin 0.026 0.084 0.000 emax 0.056 0.117 0.038 imean 15.994 15.346 16.600 imin 14.975 14.575 15.153 imax 16.866 16.196 18.389 excite_mean 0.278 0.283 0.286 fracstop 1.000 1.000 1.000 cjmean 2.971 2.983 2.956 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 175.9 180.8 184.8 kozaiamp 180.0 180.0 179.9