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: 16EY390 # Created Wed Nov 27 02:10:35 2024 # Orbit generated from Bernstein formalism # Fitting 9 observations of 9 # Arc: 5.00d # First observation: 2016/03/04 # Last observation: 2016/03/09 Preliminary a, adot, b, bdot, g, gdot: -0.000000 0.034105 0.000000 0.005465 0.026241 0.000000 # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # WARNING Fitting with energy constraint # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # Chi-squared of fit: 8.19 DOF: 13 RMS: 0.17 # Min/Max residuals: -0.35 0.39 # Exact a, adot, b, bdot, g, gdot: 1.569181E-05 2.521425E-02 4.300923E-06 6.833445E-03 2.467801E-02 -1.705317E-03 # Covariance matrix: 2.0448E-11 3.0139E-08 -2.5944E-12 -4.6078E-09 5.3706E-09 1.0296E-08 3.0139E-08 4.5408E-05 -3.9036E-09 -6.9334E-06 8.0808E-06 1.4580E-05 -2.5944E-12 -3.9036E-09 7.2979E-13 5.6129E-10 -6.9479E-10 -1.3775E-09 -4.6078E-09 -6.9334E-06 5.6129E-10 1.0641E-06 -1.2340E-06 -2.1648E-06 5.3706E-09 8.0808E-06 -6.9479E-10 -1.2340E-06 1.4383E-06 2.7070E-06 1.0296E-08 1.4580E-05 -1.3775E-09 -2.1648E-06 2.7070E-06 4.4655E-04 # lat0 lon0 xBary yBary zBary JD0 -17.245589 138.197726 -0.426204 -0.264289 -0.851964 2457451.779039 # Heliocentric elements and errors Epoch: 2457450.5000 = 2016/03/03 Mean Anomaly: 346.73654 +/- 178.974 Argument of Peri: 330.80588 +/- 275.905 Long of Asc Node: 185.51166 +/- 11.830 Inclination: 22.63352 +/- 3.973 Eccentricity: 0.19144040 +/- 0.4784 Semi-Major Axis: 50.69029720 +/- 22.4715 Time of Perihelion: 2462307.1851 +/- 65455.2 Perihelion: 40.98612627 +/- 30.3021 Aphelion: 60.39446812 +/- 36.1235 Period (y) 360.9071 +/- 239.99 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -29.80229085 +/- 1.4019 Ecliptic Y 26.07064577 +/- 1.2537 Ecliptic Z -12.01329601 +/- 0.5838 Ecliptic XDOT -0.00189762 +/- 0.0017 Ecliptic YDOT -0.00206288 +/- 0.0015 Ecliptic ZDOT 0.00078014 +/- 0.0007 # Distances at JD0 (AU) Heliocenter to KBO 41.37842907 +/- 1.2931 Geocenter to KBO 40.52191129 +/- 1.9692 # Hcoef: 8.64
The following table shows the complete astrometric record for 16EY390. 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 (16EY390) followed by the observatory code and reference code for the source of the astrometry.
2016 03 04.27825 09 01 36.70 -01 04 34.1 24.8i 16EY390 T09 C~8HEi 2016 03 04.30272 09 01 36.59 -01 04 33.1 24.8i 16EY390 T09 C~8HEi 2016 03 04.31712 09 01 36.54 -01 04 32.7 24.2i 16EY390 T09 C~8HEi 2016 03 07.23281 09 01 25.40 -01 02 53.8 25.5g 16EY390 T09 C~8HEi 2016 03 07.24631 09 01 25.34 -01 02 53.3 25.3g 16EY390 T09 C~8HEi 2016 03 07.25904 09 01 25.31 -01 02 53.2 25.5g 16EY390 T09 C~8HEi 2016 03 09.24583 09 01 17.98 -01 01 44.1 24.5r 16EY390 T09 C~8HEi 2016 03 09.25875 09 01 17.95 -01 01 44.1 24.5r 16EY390 T09 C~8HEi 2016 03 09.27809 09 01 17.86 -01 01 43.5 24.6r 16EY390 T09 C~8HEi
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 0.10 0.00 0.02
2 0.0001 -1.87 -0.14 0.47 0.13
3 0.0001 -2.71 -0.01 0.63 0.08
4 0.0081 -191.59 -0.01 45.53 -0.11
5 0.0081 -192.60 -0.14 45.74 -0.11
6 0.0082 -193.06 0.22 45.70 -0.35
7 0.0136 -318.54 -0.20 79.08 0.39
8 0.0136 -318.97 0.19 78.95 0.04
9 0.0137 -320.44 -0.05 79.12 -0.10
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.