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: 16EO398 # Created Sat Feb 22 02:10:46 2025 # Orbit generated from Bernstein formalism # Fitting 15 observations of 15 # Arc: 52.01d # First observation: 2016/01/15 # Last observation: 2016/03/07 Preliminary a, adot, b, bdot, g, gdot: -0.000010 0.027395 -0.000001 -0.011966 0.026442 0.000000 # Chi-squared of fit: 2.46 DOF: 24 RMS: 0.07 # Min/Max residuals: -0.13 0.21 # Exact a, adot, b, bdot, g, gdot: 1.641528E-05 2.703849E-02 -7.123491E-06 -1.197283E-02 2.639596E-02 5.970962E-03 # Covariance matrix: 2.9381E-13 1.0461E-11 2.8935E-14 -3.8596E-13 2.8346E-12 2.5794E-10 1.0461E-11 3.4458E-08 5.0814E-11 1.3540E-10 5.5666E-09 -1.0130E-08 2.8935E-14 5.0814E-11 2.9031E-13 -1.9703E-12 8.3285E-12 2.1068E-11 -3.8596E-13 1.3540E-10 -1.9703E-12 4.1404E-11 1.7268E-11 -1.5516E-09 2.8346E-12 5.5666E-09 8.3285E-12 1.7268E-11 9.0881E-10 1.1444E-09 2.5794E-10 -1.0130E-08 2.1068E-11 -1.5516E-09 1.1444E-09 9.1141E-07 # lat0 lon0 xBary yBary zBary JD0 -12.288461 140.672804 0.438268 -0.187199 -0.860314 2457402.903079 # Heliocentric elements and errors Epoch: 2457400.5000 = 2016/01/13 Mean Anomaly: 21.57794 +/- 2.079 Argument of Peri: 163.72511 +/- 5.065 Long of Asc Node: 294.95667 +/- 0.151 Inclination: 26.66931 +/- 0.130 Eccentricity: 0.33624106 +/- 0.0287 Semi-Major Axis: 54.27477647 +/- 1.3289 Time of Perihelion: 2448646.5707 +/- 779.9 Perihelion: 36.02536835 +/- 1.7906 Aphelion: 72.52418460 +/- 2.3625 Period (y) 399.8575 +/- 14.69 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -29.04120565 +/- 0.0327 Ecliptic Y 24.35417790 +/- 0.0268 Ecliptic Z -8.06341059 +/- 0.0092 Ecliptic XDOT -0.00204169 +/- 0.0001 Ecliptic YDOT -0.00196033 +/- 0.0001 Ecliptic ZDOT -0.00134519 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 38.74966061 +/- 0.0298 Geocenter to KBO 37.88459230 +/- 0.0433 # Hcoef: 7.62
The following table shows the complete astrometric record for 16EO398. 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 (16EO398) followed by the observatory code and reference code for the source of the astrometry.
2016 01 15.40229 09 16 43.96 +02 55 33.1 22.7z 16EO398 T09 C~8eUr 2016 01 15.41648 09 16 43.89 +02 55 33.2 22.9z 16EO398 T09 C~8eUr 2016 01 15.44640 09 16 43.75 +02 55 33.6 23.0z 16EO398 T09 C~8eUr 2016 01 15.45754 09 16 43.70 +02 55 33.4 22.9z 16EO398 T09 C~8eUr 2016 01 15.47139 09 16 43.63 +02 55 33.4 22.8z 16EO398 T09 C~8eUr 2016 02 03.47801 09 15 07.57 +02 59 06.9 23.1y 16EO398 T09 C~8eUr 2016 02 03.52502 09 15 07.32 +02 59 07.6 23.0y 16EO398 T09 C~8eUr 2016 02 03.54690 09 15 07.21 +02 59 07.9 23.5y 16EO398 T09 C~8eUr 2016 02 03.56853 09 15 07.09 +02 59 08.4 23.7y 16EO398 T09 C~8eUr 2016 02 08.41135 09 14 41.79 +03 00 27.7 23.4r 16EO398 T09 C~8eUr 2016 02 08.46194 09 14 41.52 +03 00 28.7 23.5r 16EO398 T09 C~8eUr 2016 02 08.48123 09 14 41.42 +03 00 29.0 23.6r 16EO398 T09 C~8eUr 2016 03 07.36412 09 12 24.73 +03 10 10.3 24.6g 16EO398 T09 C~8eUr 2016 03 07.39560 09 12 24.58 +03 10 11.0 24.3g 16EO398 T09 C~8eUr 2016 03 07.41288 09 12 24.50 +03 10 11.5 24.3g 16EO398 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 -0.04 0.00 -0.01
2 0.0000 -1.03 -0.06 -0.23 -0.01
3 0.0001 -3.15 -0.05 -0.49 0.21
4 0.0002 -3.80 0.09 -0.91 -0.03
5 0.0002 -4.80 0.08 -1.24 -0.13
6 0.0522 -1439.63 -0.04 -241.22 -0.04
7 0.0524 -1443.40 -0.04 -241.70 -0.06
8 0.0524 -1445.06 0.06 -241.92 -0.07
9 0.0525 -1446.93 -0.07 -242.00 0.06
10 0.0657 -1831.95 0.05 -283.17 -0.04
11 0.0659 -1836.10 -0.01 -283.46 0.08
12 0.0659 -1837.62 0.04 -283.64 0.06
13 0.1423 -3964.99 0.12 -359.88 0.02
14 0.1423 -3967.35 -0.02 -359.91 -0.05
15 0.1424 -3968.64 -0.10 -359.80 0.03
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.
16EO398 quality flag:1 Type: 12:5EEEEEE11:4EEEEEE SCATNEAR axisobj 54.132 59.474 50.499 ecceobj 0.336 0.425 0.264 incobj 26.682 26.541 26.969 qmin 35.294 32.870 35.472 qmax 73.509 86.702 66.055 amean 53.972 59.099 50.389 amin 53.389 58.285 49.872 amax 54.737 60.137 51.033 emean 0.333 0.424 0.273 emin 0.322 0.408 0.250 emax 0.345 0.443 0.295 imean 28.267 27.872 28.271 imin 27.998 27.278 27.671 imax 28.534 28.602 28.966 excite_mean 0.579 0.631 0.547 fracstop 1.000 1.000 1.000 cjmean 2.781 2.751 2.789 libcent 0 179.9 183.5 -180.0 libamp 0 162.0 164.9 -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 179.1 180.0 180.3 kozaiamp 179.9 180.0 179.9