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 Mon Apr 28 01:10:46 2025 # Orbit generated from Bernstein formalism # Fitting 17 observations of 17 # Arc: 52.01d # First observation: 2016/01/15 # Last observation: 2016/03/07 Preliminary a, adot, b, bdot, g, gdot: -0.000008 0.027497 -0.000001 -0.011964 0.026462 0.000000 # Chi-squared of fit: 5.62 DOF: 28 RMS: 0.10 # Min/Max residuals: -0.18 0.30 # Exact a, adot, b, bdot, g, gdot: 1.636096E-05 2.700748E-02 -7.238704E-06 -1.197048E-02 2.639063E-02 6.025858E-03 # Covariance matrix: 2.4873E-13 9.7345E-12 2.3322E-14 -3.1706E-13 2.5458E-12 2.2303E-10 9.7345E-12 3.2697E-08 4.3185E-11 1.6466E-10 5.2769E-09 -9.0100E-09 2.3322E-14 4.3185E-11 2.4454E-13 -1.6215E-12 7.0713E-12 1.9457E-11 -3.1706E-13 1.6466E-10 -1.6215E-12 3.5162E-11 2.2197E-11 -1.5001E-09 2.5458E-12 5.2769E-09 7.0713E-12 2.2197E-11 8.6048E-10 1.1988E-09 2.2303E-10 -9.0100E-09 1.9457E-11 -1.5001E-09 1.1988E-09 8.7962E-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: 21.81170 +/- 2.017 Argument of Peri: 163.23839 +/- 4.926 Long of Asc Node: 294.97738 +/- 0.148 Inclination: 26.68711 +/- 0.127 Eccentricity: 0.33660728 +/- 0.0284 Semi-Major Axis: 54.22836581 +/- 1.3130 Time of Perihelion: 2448563.0860 +/- 751.5 Perihelion: 35.97470317 +/- 1.7705 Aphelion: 72.48202844 +/- 2.3358 Period (y) 399.3447 +/- 14.50 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -29.04698260 +/- 0.0318 Ecliptic Y 24.35891336 +/- 0.0261 Ecliptic Z -8.06504221 +/- 0.0090 Ecliptic XDOT -0.00204441 +/- 0.0001 Ecliptic YDOT -0.00195467 +/- 0.0001 Ecliptic ZDOT -0.00134643 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 38.75730594 +/- 0.0290 Geocenter to KBO 37.89223820 +/- 0.0421 # Hcoef: 7.54
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 01 16.215706 09 16 40.063 +02 55 38.75 23.7r 16EO398 W84 C~8idz 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 01.238569 09 12 52.361 +03 07 51.02 21.8z 16EO398 W84 C~8idz 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 -0.04 -0.49 0.23
4 0.0002 -3.80 0.10 -0.91 -0.01
5 0.0002 -4.80 0.09 -1.24 -0.11
6 0.0022 -57.28 -0.01 -12.61 -0.03
7 0.0522 -1439.63 -0.05 -241.22 -0.06
8 0.0524 -1443.40 -0.05 -241.70 -0.09
9 0.0524 -1445.06 0.05 -241.92 -0.10
10 0.0525 -1446.93 -0.08 -242.00 0.04
11 0.0657 -1831.95 0.02 -283.17 -0.07
12 0.0659 -1836.10 -0.03 -283.46 0.04
13 0.0659 -1837.62 0.02 -283.64 0.02
14 0.1255 -3528.23 0.30 -365.29 0.26
15 0.1423 -3964.99 0.04 -359.88 -0.03
16 0.1423 -3967.35 -0.10 -359.91 -0.10
17 0.1424 -3968.64 -0.18 -359.80 -0.02
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: SCATNEAR SCATNEAR SCATNEAR axisobj 54.088 59.340 50.504 ecceobj 0.337 0.424 0.265 incobj 26.700 26.560 26.982 qmin 33.967 32.096 35.348 qmax 74.893 87.141 66.058 amean 53.977 59.081 50.397 amin 53.342 58.274 49.885 amax 54.767 60.195 51.034 emean 0.342 0.426 0.273 emin 0.320 0.403 0.249 emax 0.370 0.454 0.295 imean 27.909 27.829 28.313 imin 27.039 26.456 27.638 imax 28.688 28.978 29.013 excite_mean 0.580 0.632 0.547 fracstop 1.000 1.000 1.000 cjmean 2.781 2.749 2.789 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 191.4 201.0 178.6 kozaiamp 180.0 180.0 180.0