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: 17RY137 # Created Sun Dec 22 02:11:01 2024 # Orbit generated from Bernstein formalism # Fitting 9 observations of 9 # Arc: 3.16y # First observation: 2015/09/11 # Last observation: 2018/11/09 Preliminary a, adot, b, bdot, g, gdot: 0.000169 0.025968 0.000018 0.001034 0.024993 0.000000 # Chi-squared of fit: 10.78 DOF: 12 RMS: 0.19 # Min/Max residuals: -0.39 0.40 # Exact a, adot, b, bdot, g, gdot: 1.584234E-05 2.611962E-02 -2.589916E-07 1.047093E-03 2.514312E-02 -3.480927E-03 # Covariance matrix: 6.7899E-13 -6.9841E-13 2.9685E-14 -3.8217E-14 -3.6481E-13 -5.9986E-12 -6.9841E-13 1.5526E-12 -1.9564E-14 -2.7132E-14 1.9728E-12 1.6881E-11 2.9685E-14 -1.9564E-14 5.5739E-13 -3.2414E-13 7.1066E-13 -7.4381E-13 -3.8217E-14 -2.7132E-14 -3.2414E-13 3.6565E-13 -1.5630E-12 7.3456E-13 -3.6481E-13 1.9728E-12 7.1066E-13 -1.5630E-12 1.2725E-11 1.6527E-11 -5.9986E-12 1.6881E-11 -7.4381E-13 7.3456E-13 1.6527E-11 2.0542E-10 # lat0 lon0 xBary yBary zBary JD0 -33.644424 -64.432840 -0.799402 -0.342136 -0.514376 2457276.553939 # Heliocentric elements and errors Epoch: 2457270.5000 = 2015/09/05 Mean Anomaly: 323.55539 +/- 0.108 Argument of Peri: 324.28790 +/- 0.159 Long of Asc Node: 21.16593 +/- 0.002 Inclination: 33.28375 +/- 0.000 Eccentricity: 0.16215739 +/- 0.0006 Semi-Major Axis: 45.74392169 +/- 0.0316 Time of Perihelion: 2468710.5875 +/- 31.9 Perihelion: 38.32620664 +/- 0.0385 Aphelion: 53.16163673 +/- 0.0461 Period (y) 309.3914 +/- 0.32 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 15.27401872 +/- 0.0020 Ecliptic Y -30.08064762 +/- 0.0042 Ecliptic Z -22.03535208 +/- 0.0031 Ecliptic XDOT 0.00245492 +/- 0.0000 Ecliptic YDOT 0.00144870 +/- 0.0000 Ecliptic ZDOT 0.00030497 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 40.29513309 +/- 0.0037 Geocenter to KBO 39.77231506 +/- 0.0056 # Hcoef: 7.69
The following table shows the complete astrometric record for 17RY137. 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 (17RY137) followed by the observatory code and reference code for the source of the astrometry.
2015 09 11.05315 20 29 54.293 -53 48 27.70 23.3i 17RY137 W84 C~55dE 2015 09 11.05452 20 29 54.278 -53 48 28.29 24.3r 17RY137 W84 C~55dE 2016 09 22.03290 20 38 25.056 -53 11 30.81 23.9r 17RY137 W84 C~55dE 2016 09 22.03427 20 38 25.056 -53 11 30.24 24.0g 17RY137 W84 C~55dE 2017 09 14.06667 20 48 22.322 -52 41 46.86 24.1r 17RY137 W84 C~55dE 2017 09 18.05930 20 48 01.392 -52 39 56.72 23.4g 17RY137 W84 C~55dE 2017 09 27.03065 20 47 21.557 -52 35 01.25 23.2r 17RY137 W84 C~55dE 2018 11 07.02800 20 55 40.243 -51 26 01.67 24.4r 17RY137 W84 C~55dE 2018 11 09.04729 20 55 44.616 -51 24 04.78 24.4g 17RY137 W84 C~55dE
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 0.19
2 0.0000 -0.30 -0.12 -0.53 -0.39
3 1.0321 5016.98 -0.08 721.33 -0.08
4 1.0321 5017.16 0.13 721.87 0.40
5 2.0096 10709.49 0.08 590.27 -0.05
6 2.0206 10569.62 0.05 760.47 0.09
7 2.0451 10332.53 -0.23 1164.60 -0.08
8 3.1567 16147.79 0.04 3364.49 -0.34
9 3.1622 16230.13 0.01 3457.87 0.26
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.
17RY137 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 45.797 45.884 45.709 ecceobj 0.166 0.167 0.165 incobj 33.309 33.310 33.309 qmin 37.278 37.410 37.281 qmax 54.871 54.965 54.776 amean 45.929 46.008 45.834 amin 45.531 45.625 45.453 amax 46.352 46.443 46.259 emean 0.169 0.168 0.168 emin 0.153 0.155 0.152 emax 0.185 0.184 0.185 imean 33.046 33.077 33.032 imin 32.812 32.817 32.794 imax 33.371 33.364 33.368 excite_mean 0.571 0.571 0.570 fracstop 1.000 1.000 1.000 cjmean 2.697 2.697 2.696 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 166.9 164.9 168.6 kozaiamp 179.9 180.0 180.0