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: 16AU404 # Created Mon Jul 7 01:11:03 2025 # Orbit generated from Bernstein formalism # Fitting 10 observations of 10 # Arc: 4.00d # First observation: 2016/01/11 # Last observation: 2016/01/15 # WARNING Fitting with energy constraint # WARNING and with gdot fixed = 0 # Chi-squared of fit: 5.03 DOF: 16 RMS: 0.13 # Min/Max residuals: -0.21 0.40 # Exact a, adot, b, bdot, g, gdot: 1.511082E-05 2.499685E-02 7.389053E-06 1.192380E-02 2.687096E-02 0.000000E+00 # Covariance matrix: 4.5507E-11 7.6699E-08 4.4817E-12 7.5525E-09 1.2999E-08 0.0000E+00 7.6699E-08 1.3033E-04 7.6119E-09 1.2827E-05 2.2078E-05 0.0000E+00 4.4817E-12 7.6119E-09 7.7545E-13 7.1833E-10 1.2896E-09 0.0000E+00 7.5525E-09 1.2827E-05 7.1833E-10 1.2678E-06 2.1732E-06 0.0000E+00 1.2999E-08 2.2078E-05 1.2896E-09 2.1732E-06 3.7405E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 2.5531E-04 # lat0 lon0 xBary yBary zBary JD0 -13.739769 134.741572 0.409771 -0.212183 -0.868625 2457398.890419 # Heliocentric elements and errors Epoch: 2457390.5000 = 2016/01/03 Mean Anomaly: 343.24407 +/- 3.695 Argument of Peri: 348.54832 +/- 73.277 Long of Asc Node: 160.27116 +/- 8.169 Inclination: 28.42224 +/- 7.042 Eccentricity: 0.02945630 +/- 0.5804 Semi-Major Axis: 39.19043262 +/- 20.6311 Time of Perihelion: 2461561.4461 +/- 269737.2 Perihelion: 38.03602766 +/- 30.3050 Aphelion: 40.34483758 +/- 31.1215 Period (y) 245.3456 +/- 193.74 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -25.78888620 +/- 1.8313 Ecliptic Y 26.59866273 +/- 1.8482 Ecliptic Z -8.83877081 +/- 0.6362 Ecliptic XDOT -0.00201290 +/- 0.0013 Ecliptic YDOT -0.00159476 +/- 0.0013 Ecliptic ZDOT 0.00118016 +/- 0.0004 # Distances at JD0 (AU) Heliocenter to KBO 38.08778518 +/- 1.7959 Geocenter to KBO 37.21490016 +/- 2.6785 # Hcoef: 8.73
The following table shows the complete astrometric record for 16AU404. 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 (16AU404) followed by the observatory code and reference code for the source of the astrometry.
2016 01 11.38963 08 52 53.96 +03 14 28.1 25.2g 16AU404 T09 C~8vHA 2016 01 11.39248 08 52 53.96 +03 14 28.2 25.5g 16AU404 T09 C~8vHA 2016 01 11.40097 08 52 53.91 +03 14 28.4 25.2g 16AU404 T09 C~8vHA 2016 01 11.41375 08 52 53.85 +03 14 28.6 25.0g 16AU404 T09 C~8vHA 2016 01 15.34452 08 52 34.68 +03 15 43.7 23.8z 16AU404 T09 C~8vHA 2016 01 15.34799 08 52 34.67 +03 15 43.9 24.7z 16AU404 T09 C~8vHA 2016 01 15.35337 08 52 34.65 +03 15 43.9 24.0z 16AU404 T09 C~8vHA 2016 01 15.37226 08 52 34.54 +03 15 44.4 23.8z 16AU404 T09 C~8vHA 2016 01 15.38037 08 52 34.50 +03 15 44.7 24.6z 16AU404 T09 C~8vHA 2016 01 15.38578 08 52 34.49 +03 15 45.1 24.1z 16AU404 T09 C~8vHA
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 -0.08 0.00 -0.08
2 0.0000 -0.03 0.10 0.10 0.03
3 0.0000 -0.80 -0.03 0.08 0.04
4 0.0001 -1.72 0.01 0.02 0.02
5 0.0108 -298.35 -0.04 -8.40 -0.21
6 0.0108 -298.55 0.03 -8.25 -0.05
7 0.0109 -298.84 0.16 -8.33 -0.13
8 0.0109 -300.56 -0.09 -8.31 -0.08
9 0.0109 -301.22 -0.12 -8.19 0.05
10 0.0109 -301.47 0.05 -7.85 0.40
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.
16AU404 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0