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: 16EU398 # Created Sat Feb 22 02:10:46 2025 # Orbit generated from Bernstein formalism # Fitting 16 observations of 16 # Arc: 90.80d # First observation: 2016/03/07 # Last observation: 2016/06/06 Preliminary a, adot, b, bdot, g, gdot: -0.000012 0.027128 -0.000006 0.005037 0.025215 0.000000 # Chi-squared of fit: 6.37 DOF: 26 RMS: 0.11 # Min/Max residuals: -0.26 0.27 # Exact a, adot, b, bdot, g, gdot: 1.552292E-05 2.381406E-02 2.855816E-06 4.996615E-03 2.466588E-02 -1.660994E-04 # Covariance matrix: 4.3998E-13 -2.2109E-11 3.3516E-15 5.3923E-13 -5.9329E-13 6.0494E-10 -2.2109E-11 2.3721E-08 -5.0343E-11 3.8063E-10 4.1958E-09 7.0615E-09 3.3516E-15 -5.0343E-11 3.0107E-13 -1.8012E-12 -9.4735E-12 -1.2413E-10 5.3923E-13 3.8063E-10 -1.8012E-12 1.6780E-11 7.9270E-11 2.4123E-09 -5.9329E-13 4.1958E-09 -9.4735E-12 7.9270E-11 7.8530E-10 9.5259E-09 6.0494E-10 7.0615E-09 -1.2413E-10 2.4123E-09 9.5259E-09 1.5977E-06 # lat0 lon0 xBary yBary zBary JD0 10.204365 -152.771496 0.638125 0.134074 -0.744017 2457455.086239 # Heliocentric elements and errors Epoch: 2457450.5000 = 2016/03/03 Mean Anomaly: 317.62558 +/- 66.129 Argument of Peri: 85.24269 +/- 71.996 Long of Asc Node: 166.96207 +/- 0.166 Inclination: 15.56006 +/- 0.052 Eccentricity: 0.03101003 +/- 0.0371 Semi-Major Axis: 42.24408796 +/- 0.3630 Time of Perihelion: 2469255.0281 +/- 18421.3 Perihelion: 40.93409732 +/- 1.6055 Aphelion: 43.55407860 +/- 1.6106 Period (y) 274.5725 +/- 3.54 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -36.44678127 +/- 0.0403 Ecliptic Y -18.03701246 +/- 0.0207 Ecliptic Z 7.18251316 +/- 0.0082 Ecliptic XDOT 0.00131278 +/- 0.0001 Ecliptic YDOT -0.00230412 +/- 0.0001 Ecliptic ZDOT 0.00054258 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.29515926 +/- 0.0367 Geocenter to KBO 40.54183339 +/- 0.0461 # Hcoef: 8.34
The following table shows the complete astrometric record for 16EU398. 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 (16EU398) followed by the observatory code and reference code for the source of the astrometry.
2016 03 07.58545 13 55 42.27 -00 56 59.9 25.0g 16EU398 T09 C~8eUr 2016 03 07.60489 13 55 42.21 -00 56 59.4 25.0g 16EU398 T09 C~8eUr 2016 03 07.61994 13 55 42.17 -00 56 59.0 25.2g 16EU398 T09 C~8eUr 2016 03 16.45267 13 55 13.07 -00 52 19.3 24.1z 16EU398 T09 C~8eUr 2016 03 16.50776 13 55 12.86 -00 52 17.4 23.8z 16EU398 T09 C~8eUr 2016 03 16.53265 13 55 12.76 -00 52 16.9 24.8z 16EU398 T09 C~8eUr 2016 03 16.56535 13 55 12.64 -00 52 15.8 24.4z 16EU398 T09 C~8eUr 2016 03 16.60979 13 55 12.47 -00 52 14.6 24.8z 16EU398 T09 C~8eUr 2016 03 16.63751 13 55 12.37 -00 52 13.6 24.3z 16EU398 T09 C~8eUr 2016 06 01.36947 13 49 54.47 -00 20 15.6 23.8z 16EU398 T09 C~8eUr 2016 06 01.37832 13 49 54.45 -00 20 15.4 23.7z 16EU398 T09 C~8eUr 2016 06 01.40260 13 49 54.36 -00 20 15.2 23.6z 16EU398 T09 C~8eUr 2016 06 01.41069 13 49 54.35 -00 20 15.1 23.7z 16EU398 T09 C~8eUr 2016 06 06.33364 13 49 39.61 -00 19 34.7 26.4g 16EU398 T09 C~8eUr 2016 06 06.35147 13 49 39.55 -00 19 34.4 25.3g 16EU398 T09 C~8eUr 2016 06 06.38128 13 49 39.46 -00 19 34.2 25.3g 16EU398 T09 C~8eUr
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 -0.05 0.00 0.07
2 0.0001 -1.02 -0.01 0.15 -0.02
3 0.0001 -1.72 0.10 0.31 -0.05
4 0.0243 -508.89 0.18 107.53 0.20
5 0.0244 -512.51 0.01 108.19 0.27
6 0.0245 -514.09 -0.02 108.13 -0.05
7 0.0246 -516.16 -0.04 108.52 -0.01
8 0.0247 -518.97 -0.07 108.74 -0.26
9 0.0248 -520.73 -0.10 109.14 -0.16
10 0.2349 -5660.57 -0.02 215.52 -0.04
11 0.2349 -5660.92 0.06 215.60 0.12
12 0.2350 -5662.25 -0.09 215.31 0.02
13 0.2350 -5662.43 0.13 215.35 0.13
14 0.2485 -5883.68 0.11 174.85 -0.15
15 0.2485 -5884.63 -0.06 174.81 -0.02
16 0.2486 -5885.96 -0.11 174.52 -0.05
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.
16EU398 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 41.783 43.146 40.666 ecceobj 0.026 0.086 0.033 incobj 15.625 15.509 15.801 qmin 40.440 38.633 38.920 qmax 43.791 48.407 43.079 amean 42.044 43.422 40.916 amin 41.724 43.081 40.601 amax 42.369 43.785 41.235 emean 0.021 0.092 0.031 emin 0.009 0.079 0.017 emax 0.035 0.107 0.045 imean 15.259 15.034 15.719 imin 14.712 14.533 14.847 imax 15.904 15.585 16.510 excite_mean 0.264 0.275 0.273 fracstop 1.000 1.000 1.000 cjmean 2.996 3.003 2.978 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 178.9 175.5 179.6 kozaiamp 180.0 180.0 180.0