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: 16EA391 # Created Wed Nov 27 02:10:35 2024 # Orbit generated from Bernstein formalism # Fitting 10 observations of 10 # Arc: 5.04d # First observation: 2016/03/04 # Last observation: 2016/03/09 Preliminary a, adot, b, bdot, g, gdot: -0.000001 0.019510 0.000000 -0.002657 0.017670 0.000000 # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # WARNING Fitting with energy constraint # Chi-squared of fit: 4.94 DOF: 15 RMS: 0.12 # Min/Max residuals: -0.22 0.27 # Exact a, adot, b, bdot, g, gdot: 1.249123E-05 1.393062E-02 -1.392796E-06 -1.874482E-03 1.670080E-02 8.839181E-05 # Covariance matrix: 1.5303E-11 1.5486E-08 -1.9004E-12 -2.1740E-09 2.7196E-09 -3.2781E-09 1.5486E-08 1.6034E-05 -1.9638E-09 -2.2466E-06 2.8103E-06 -3.6746E-06 -1.9004E-12 -1.9638E-09 5.3290E-13 2.4976E-10 -3.4430E-10 4.1299E-10 -2.1740E-09 -2.2466E-06 2.4976E-10 3.1932E-07 -3.9387E-07 5.1539E-07 2.7196E-09 2.8103E-06 -3.4430E-10 -3.9387E-07 4.9272E-07 -5.9037E-07 -3.2781E-09 -3.6746E-06 4.1299E-10 5.1539E-07 -5.9037E-07 3.0739E-04 # lat0 lon0 xBary yBary zBary JD0 -16.996977 139.789986 -0.400561 -0.264034 -0.864373 2457451.736149 # Heliocentric elements and errors Epoch: 2457450.5000 = 2016/03/03 Mean Anomaly: 5.65155 +/- 306.369 Argument of Peri: 239.49360 +/- 93.190 Long of Asc Node: 254.92882 +/- 1.356 Inclination: 18.33096 +/- 0.185 Eccentricity: 0.09586272 +/- 0.5024 Semi-Major Axis: 67.14351806 +/- 33.6526 Time of Perihelion: 2454295.7136 +/- 371970.0 Perihelion: 60.70695788 +/- 45.4254 Aphelion: 73.58007825 +/- 49.9773 Period (y) 550.1921 +/- 413.64 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -44.68302864 +/- 1.8379 Ecliptic Y 37.24295559 +/- 1.5539 Ecliptic Z -17.50351791 +/- 0.7356 Ecliptic XDOT -0.00141650 +/- 0.0021 Ecliptic YDOT -0.00180007 +/- 0.0019 Ecliptic ZDOT -0.00029810 +/- 0.0008 # Distances at JD0 (AU) Heliocenter to KBO 60.74523791 +/- 1.6674 Geocenter to KBO 59.87736935 +/- 2.5167 # Hcoef: 6.30
The following table shows the complete astrometric record for 16EA391. 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 (16EA391) followed by the observatory code and reference code for the source of the astrometry.
2016 03 04.23536 09 07 43.05 -01 17 45.1 23.9i 16EA391 T09 C~8HEi 2016 03 04.28093 09 07 42.90 -01 17 44.1 24.4i 16EA391 T09 C~8HEi 2016 03 04.29453 09 07 42.88 -01 17 43.7 23.9i 16EA391 T09 C~8HEi 2016 03 04.31992 09 07 42.79 -01 17 43.2 23.7i 16EA391 T09 C~8HEi 2016 03 07.23565 09 07 34.57 -01 16 44.8 24.1g 16EA391 T09 C~8HEi 2016 03 07.24843 09 07 34.54 -01 16 44.6 24.2g 16EA391 T09 C~8HEi 2016 03 07.26961 09 07 34.50 -01 16 44.5 24.1g 16EA391 T09 C~8HEi 2016 03 09.23515 09 07 29.12 -01 16 04.2 24.4r 16EA391 T09 C~8HEi 2016 03 09.26092 09 07 29.06 -01 16 03.8 24.7r 16EA391 T09 C~8HEi 2016 03 09.28024 09 07 29.00 -01 16 03.3 24.0r 16EA391 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 0.14 0.00 -0.08
2 0.0001 -2.45 -0.13 0.27 -0.07
3 0.0002 -2.85 0.11 0.56 0.15
4 0.0002 -4.29 -0.11 0.63 0.07
5 0.0082 -139.48 -0.21 18.81 0.03
6 0.0082 -139.97 -0.10 18.86 0.00
7 0.0083 -140.57 0.27 18.77 -0.22
8 0.0137 -229.68 -0.07 32.65 0.06
9 0.0138 -230.66 0.12 32.76 -0.01
10 0.0138 -231.67 -0.02 32.96 0.06
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.