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: 16SU58 # Created Sun Feb 23 02:10:56 2025 # Orbit generated from Bernstein formalism # Fitting 9 observations of 9 # Arc: 22.05d # First observation: 2016/09/07 # Last observation: 2016/09/29 Preliminary a, adot, b, bdot, g, gdot: -0.000000 0.040362 -0.000001 0.004594 0.031806 0.000000 # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # WARNING Fitting with energy constraint # Chi-squared of fit: 1.98 DOF: 13 RMS: 0.08 # Min/Max residuals: -0.14 0.17 # Exact a, adot, b, bdot, g, gdot: 1.858602E-05 3.628294E-02 1.275356E-06 3.855502E-03 3.082115E-02 3.654794E-04 # Covariance matrix: 2.6321E-12 4.6850E-09 4.6995E-13 8.7000E-10 9.7262E-10 1.8458E-08 4.6850E-09 9.3909E-06 9.4088E-10 1.7422E-06 1.9460E-06 3.5893E-05 4.6995E-13 9.4088E-10 3.8372E-13 1.6962E-10 1.9508E-10 3.6695E-09 8.7000E-10 1.7422E-06 1.6962E-10 3.2343E-07 3.6086E-07 6.5323E-06 9.7262E-10 1.9460E-06 1.9508E-10 3.6086E-07 4.0468E-07 8.4579E-06 1.8458E-08 3.5893E-05 3.6695E-09 6.5323E-06 8.4579E-06 8.7963E-04 # lat0 lon0 xBary yBary zBary JD0 -13.964918 34.135695 0.760551 -0.160356 -0.645458 2457639.015289 # Heliocentric elements and errors Epoch: 2457630.5000 = 2016/08/30 Mean Anomaly: 356.37938 +/- 223.868 Argument of Peri: 297.47989 +/- 321.477 Long of Asc Node: 99.74766 +/- 1.463 Inclination: 14.82044 +/- 0.149 Eccentricity: 0.17064710 +/- 0.1188 Semi-Major Axis: 39.88143312 +/- 5.6950 Time of Perihelion: 2458555.6980 +/- 57206.0 Perihelion: 33.07578240 +/- 6.6910 Aphelion: 46.68708385 +/- 8.1797 Period (y) 251.8630 +/- 53.95 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 27.03486081 +/- 0.5379 Ecliptic Y 17.40972975 +/- 0.3646 Ecliptic Z -7.82988822 +/- 0.1616 Ecliptic XDOT -0.00171246 +/- 0.0021 Ecliptic YDOT 0.00272486 +/- 0.0015 Ecliptic ZDOT 0.00032450 +/- 0.0006 # Distances at JD0 (AU) Heliocenter to KBO 33.09515883 +/- 0.4810 Geocenter to KBO 32.44525116 +/- 0.6697 # Hcoef: 8.79
The following table shows the complete astrometric record for 16SU58. 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 (16SU58) followed by the observatory code and reference code for the source of the astrometry.
2016 09 07.51450 02 26 13.88 -00 16 29.4 23.9r 16SU58 T09 C~8eVS 2016 09 07.51735 02 26 13.88 -00 16 29.7 23.7r 16SU58 T09 C~8eVS 2016 09 07.53338 02 26 13.82 -00 16 30.2 24.0r 16SU58 T09 C~8eVS 2016 09 07.55335 02 26 13.78 -00 16 30.9 24.0r 16SU58 T09 C~8eVS 2016 09 07.61543 02 26 13.57 -00 16 32.9 24.2r 16SU58 T09 C~8eVS 2016 09 28.43685 02 24 54.25 -00 28 35.8 24.4g 16SU58 568 C~2eAJ 2016 09 28.50910 02 24 53.91 -00 28 38.3 24.6g 16SU58 568 C~2eAJ 2016 09 29.44842 02 24 49.53 -00 29 11.1 24.4g 16SU58 568 C~2eAJ 2016 09 29.56807 02 24 48.96 -00 29 15.3 24.4g 16SU58 568 C~2eAJ
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 0.01 0.00 0.14
2 0.0000 -0.10 0.06 -0.28 -0.09
3 0.0001 -1.11 -0.10 -0.46 0.00
4 0.0001 -1.91 0.17 -0.92 -0.12
5 0.0003 -5.54 -0.14 -1.77 0.07
6 0.0573 -1367.01 -0.01 -292.66 -0.04
7 0.0575 -1372.65 0.03 -293.35 -0.02
8 0.0601 -1445.48 -0.04 -302.69 0.05
9 0.0604 -1454.94 0.02 -303.84 0.00
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.
16SU58 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