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: 16SZ105 # Created Wed Dec 25 02:10:49 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 12 observations of 12 # Arc: 5.12y # First observation: 2016/09/22 # Last observation: 2021/11/05 # Chi-squared of fit: 2.22 DOF: 18 RMS: 0.08 # Min/Max residuals: -0.12 0.20 # Exact a, adot, b, bdot, g, gdot: 1.568647E-05 2.346736E-02 -7.972703E-07 -8.569926E-04 2.417811E-02 -6.598178E-04 # Covariance matrix: 5.2261E-13 -4.7700E-13 -1.0356E-14 1.7019E-14 2.2179E-13 -3.9073E-12 -4.7700E-13 1.1223E-12 2.1186E-14 -4.1196E-14 8.6025E-13 8.8324E-12 -1.0356E-14 2.1186E-14 2.1712E-13 -6.4326E-14 8.5131E-15 1.8131E-13 1.7019E-14 -4.1196E-14 -6.4326E-14 4.4427E-14 -2.8203E-14 -3.4147E-13 2.2179E-13 8.6025E-13 8.5131E-15 -2.8203E-14 2.7456E-12 5.0809E-12 -3.9073E-12 8.8324E-12 1.8131E-13 -3.4147E-13 5.0809E-12 7.4129E-11 # lat0 lon0 xBary yBary zBary JD0 -2.104989 0.137577 0.011554 -0.036821 -1.006519 2457653.608799 # Heliocentric elements and errors Epoch: 2457654.5000 = 2016/09/23 Mean Anomaly: 287.25094 +/- 0.358 Argument of Peri: 300.41235 +/- 0.400 Long of Asc Node: 135.69428 +/- 0.007 Inclination: 2.93483 +/- 0.000 Eccentricity: 0.02892739 +/- 0.0004 Semi-Major Axis: 42.69585286 +/- 0.0104 Time of Perihelion: 2478246.6572 +/- 105.7 Perihelion: 41.46077307 +/- 0.0184 Aphelion: 43.93093264 +/- 0.0187 Period (y) 278.9888 +/- 0.10 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 42.33529887 +/- 0.0028 Ecliptic Y 0.08750513 +/- 0.0000 Ecliptic Z -1.51921921 +/- 0.0001 Ecliptic XDOT -0.00008282 +/- 0.0000 Ecliptic YDOT 0.00265028 +/- 0.0000 Ecliptic ZDOT -0.00009427 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.36265697 +/- 0.0028 Geocenter to KBO 41.35977083 +/- 0.0028 # Hcoef: 7.00
The following table shows the complete astrometric record for 16SZ105. 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 (16SZ105) followed by the observatory code and reference code for the source of the astrometry.
2016 09 22.10801 00 03 51.319 -01 52 35.41 23.2r 16SZ105 W84 C~55a1 2016 10 05.15688 00 02 54.135 -01 58 49.09 23.3r 16SZ105 W84 C~55a1 2016 10 06.05453 00 02 50.287 -01 59 13.69 22.7z 16SZ105 W84 C~55a1 2017 09 18.22777 00 09 09.755 -01 21 12.23 23.4r 16SZ105 W84 C~55a1 2017 09 27.16491 00 08 30.384 -01 25 33.24 22.3z 16SZ105 W84 C~55a1 2017 09 27.28033 00 08 29.869 -01 25 36.37 23.2i 16SZ105 W84 C~55a1 2017 10 19.15880 00 06 56.912 -01 35 33.00 23.4i 16SZ105 W84 C~55a1 2017 10 27.15889 00 06 26.590 -01 38 40.28 23.3z 16SZ105 W84 C~55a1 2017 10 29.15639 00 06 19.490 -01 39 23.51 22.9z 16SZ105 W84 C~55a1 2017 11 09.06430 00 05 44.716 -01 42 50.19 23.4r 16SZ105 W84 C~55a1 2021 11 05.162920 00 25 56.754 +00 16 00.64 22.7G 16SZ105 G37 C~5BdG 2021 11 05.211670 00 25 56.583 +00 15 59.53 16SZ105 G37 C~5BdG
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 -0.08 0.00 0.02
2 0.0357 0.00 0.01 0.00 -0.08
3 0.0382 0.00 0.06 0.00 0.17
4 0.9887 0.00 0.04 0.00 0.00
5 1.0132 0.00 -0.03 0.00 -0.01
6 1.0135 0.00 0.01 0.00 0.20
7 1.0734 0.00 -0.03 0.00 -0.12
8 1.0953 0.00 0.02 0.00 -0.02
9 1.1007 0.00 -0.00 0.00 -0.06
10 1.1306 0.00 0.09 0.00 -0.09
11 5.1199 0.00 -0.01 0.00 0.07
12 5.1201 0.00 -0.02 0.00 -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.
16SZ105 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.115 43.115 43.115 ecceobj 0.034 0.034 0.034 incobj 2.928 2.928 2.928 qmin 40.013 40.028 40.016 qmax 46.026 46.033 46.024 amean 42.935 42.935 42.935 amin 42.606 42.595 42.604 amax 43.284 43.286 43.284 emean 0.045 0.045 0.045 emin 0.024 0.024 0.024 emax 0.064 0.064 0.064 imean 2.659 2.659 2.659 imin 1.541 1.541 1.541 imax 3.559 3.558 3.560 excite_mean 0.065 0.065 0.065 fracstop 1.000 1.000 1.000 cjmean 3.084 3.084 3.084 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 181.7 181.6 181.7 kozaiamp 180.0 180.0 179.9