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: 16EP398 # Created Sun Feb 23 02:10:42 2025 # Orbit generated from Bernstein formalism # Fitting 14 observations of 14 # Arc: 32.93d # First observation: 2016/02/08 # Last observation: 2016/03/12 Preliminary a, adot, b, bdot, g, gdot: 0.000000 0.038253 0.000001 0.012403 0.028082 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 5.11 DOF: 23 RMS: 0.11 # Min/Max residuals: -0.17 0.25 # Exact a, adot, b, bdot, g, gdot: 1.914908E-05 3.132579E-02 7.740969E-06 1.278057E-02 2.702164E-02 2.844014E-03 # Covariance matrix: 4.5717E-13 2.6741E-10 2.4739E-14 -1.4529E-11 4.1820E-11 -1.5520E-09 2.6741E-10 4.4090E-07 4.1873E-11 -2.4289E-08 6.7022E-08 -3.0874E-06 2.4739E-14 4.1873E-11 2.8689E-13 -5.9740E-12 6.2867E-12 -3.3807E-10 -1.4529E-11 -2.4289E-08 -5.9740E-12 1.4329E-09 -3.6608E-09 1.8813E-07 4.1820E-11 6.7022E-08 6.2867E-12 -3.6608E-09 1.0239E-08 -4.4199E-07 -1.5520E-09 -3.0874E-06 -3.3807E-10 1.8813E-07 -4.4199E-07 3.7061E-05 # lat0 lon0 xBary yBary zBary JD0 -11.222527 139.543192 0.015598 -0.191443 -0.965801 2457426.923819 # Heliocentric elements and errors Epoch: 2457420.5000 = 2016/02/02 Mean Anomaly: 3.69363 +/- 7.606 Argument of Peri: 318.84921 +/- 29.016 Long of Asc Node: 164.53816 +/- 0.485 Inclination: 24.55294 +/- 0.395 Eccentricity: 0.52755661 +/- 0.0430 Semi-Major Axis: 79.55675217 +/- 4.6513 Time of Perihelion: 2454761.2158 +/- 5471.0 Perihelion: 37.58606198 +/- 4.0685 Aphelion: 121.52744235 +/- 7.8871 Period (y) 709.6166 +/- 62.23 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -28.36362443 +/- 0.1034 Ecliptic Y 24.20255942 +/- 0.0882 Ecliptic Z -7.20211519 +/- 0.0270 Ecliptic XDOT -0.00246675 +/- 0.0004 Ecliptic YDOT -0.00207509 +/- 0.0004 Ecliptic ZDOT 0.00121411 +/- 0.0001 # Distances at JD0 (AU) Heliocenter to KBO 37.97538066 +/- 0.0957 Geocenter to KBO 37.00737769 +/- 0.1386 # Hcoef: 8.05
The following table shows the complete astrometric record for 16EP398. 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 (16EP398) followed by the observatory code and reference code for the source of the astrometry.
2016 02 08.42303 09 13 49.14 +04 16 44.1 23.7r 16EP398 T09 C~8eUr 2016 02 08.44625 09 13 49.03 +04 16 44.8 23.9r 16EP398 T09 C~8eUr 2016 02 08.47058 09 13 48.92 +04 16 45.6 24.0r 16EP398 T09 C~8eUr 2016 02 08.47270 09 13 48.92 +04 16 45.6 24.2r 16EP398 T09 C~8eUr 2016 02 08.52168 09 13 48.65 +04 16 47.1 23.8r 16EP398 T09 C~8eUr 2016 03 04.34374 09 11 53.22 +04 30 38.6 23.5i 16EP398 T09 C~8eUr 2016 03 04.37256 09 11 53.08 +04 30 39.7 23.3i 16EP398 T09 C~8eUr 2016 03 04.38622 09 11 53.03 +04 30 40.2 23.3i 16EP398 T09 C~8eUr 2016 03 04.39973 09 11 52.96 +04 30 40.5 23.3i 16EP398 T09 C~8eUr 2016 03 07.35383 09 11 40.84 +04 32 25.0 24.2g 16EP398 T09 C~8eUr 2016 03 07.37512 09 11 40.75 +04 32 25.7 24.5g 16EP398 T09 C~8eUr 2016 03 12.30861 09 11 21.65 +04 35 20.4 23.8z 16EP398 T09 C~8eUr 2016 03 12.32109 09 11 21.61 +04 35 20.6 23.3z 16EP398 T09 C~8eUr 2016 03 12.35149 09 11 21.49 +04 35 21.9 23.8z 16EP398 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 -0.17 0.00 -0.05
2 0.0001 -1.78 -0.07 0.17 -0.03
3 0.0001 -3.59 0.08 0.43 0.07
4 0.0001 -3.59 0.25 0.43 0.06
5 0.0003 -7.89 -0.10 0.63 -0.05
6 0.0682 -1905.15 0.18 269.56 0.04
7 0.0683 -1907.48 -0.08 269.97 0.04
8 0.0683 -1908.35 0.04 270.22 0.10
9 0.0684 -1909.44 -0.08 270.19 -0.12
10 0.0765 -2113.83 -0.05 314.90 -0.00
11 0.0765 -2115.32 -0.07 315.16 -0.06
12 0.0900 -2440.44 -0.06 395.19 0.07
13 0.0901 -2441.07 0.12 395.20 -0.13
14 0.0902 -2443.18 -0.01 395.90 0.07
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.
16EP398 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