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: 16SW105 # Created Sun Dec 22 02:10:53 2024 # Orbit generated from Bernstein formalism # Fitting 19 observations of 19 # Arc: 3.00y # First observation: 2014/10/22 # Last observation: 2017/10/21 Preliminary a, adot, b, bdot, g, gdot: -0.000277 0.021999 0.000175 0.004256 0.025532 0.000000 # Chi-squared of fit: 10.61 DOF: 32 RMS: 0.13 # Min/Max residuals: -0.32 0.27 # Exact a, adot, b, bdot, g, gdot: 1.374268E-05 2.157711E-02 3.761659E-06 4.220028E-03 2.440774E-02 -3.674623E-03 # Covariance matrix: 1.2405E-12 -1.1472E-12 -1.2422E-13 -1.0765E-13 -1.1516E-12 -1.1794E-11 -1.1472E-12 1.4900E-12 -6.2499E-14 2.0099E-13 6.8798E-13 1.7500E-11 -1.2422E-13 -6.2499E-14 5.3895E-13 -2.1034E-13 6.0063E-13 -1.2263E-12 -1.0765E-13 2.0099E-13 -2.1034E-13 1.3066E-13 -2.5561E-14 2.6096E-12 -1.1516E-12 6.8798E-13 6.0063E-13 -2.5561E-14 2.8556E-12 6.8728E-12 -1.1794E-11 1.7500E-11 -1.2263E-12 2.6096E-12 6.8728E-12 2.2085E-10 # lat0 lon0 xBary yBary zBary JD0 -28.365739 -49.602464 -0.974514 -0.100012 -0.185567 2456952.518788 # Heliocentric elements and errors Epoch: 2456950.5000 = 2014/10/20 Mean Anomaly: 234.21600 +/- 0.153 Argument of Peri: 72.29040 +/- 0.134 Long of Asc Node: 18.07120 +/- 0.002 Inclination: 30.40429 +/- 0.000 Eccentricity: 0.19447762 +/- 0.0004 Semi-Major Axis: 36.28054572 +/- 0.0095 Time of Perihelion: 2484839.4416 +/- 32.2 Perihelion: 29.22479158 +/- 0.0160 Aphelion: 43.33629987 +/- 0.0181 Period (y) 218.5340 +/- 0.09 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 24.24114704 +/- 0.0016 Ecliptic Y -26.98296098 +/- 0.0019 Ecliptic Z -19.46495046 +/- 0.0014 Ecliptic XDOT 0.00174947 +/- 0.0000 Ecliptic YDOT 0.00166875 +/- 0.0000 Ecliptic ZDOT 0.00061247 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.16549149 +/- 0.0017 Geocenter to KBO 40.97060553 +/- 0.0028 # Hcoef: 7.59
The following table shows the complete astrometric record for 16SW105. 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 (16SW105) followed by the observatory code and reference code for the source of the astrometry.
2014 10 22.01801 21 32 59.950 -44 37 27.56 23.5r 16SW105 W84 C~55a1 2015 09 13.10490 21 41 36.916 -44 10 48.96 23.9i 16SW105 W84 C~55a1 2015 09 13.10626 21 41 36.925 -44 10 49.22 23.7r 16SW105 W84 C~55a1 2015 09 13.10764 21 41 36.912 -44 10 49.12 24.1g 16SW105 W84 C~55a1 2015 09 13.10904 21 41 36.905 -44 10 49.05 23.1i 16SW105 W84 C~55a1 2015 09 13.11041 21 41 36.900 -44 10 49.01 23.7r 16SW105 W84 C~55a1 2015 09 13.11179 21 41 36.896 -44 10 48.88 24.4g 16SW105 W84 C~55a1 2016 09 24.07274 21 46 26.367 -43 25 30.99 23.8r 16SW105 W84 C~55a1 2016 09 24.07412 21 46 26.353 -43 25 31.08 23.2i 16SW105 W84 C~55a1 2016 10 02.06712 21 45 48.766 -43 23 09.92 23.8r 16SW105 W84 C~55a1 2016 10 02.06850 21 45 48.791 -43 23 09.92 23.9i 16SW105 W84 C~55a1 2016 10 02.07125 21 45 48.773 -43 23 09.99 23.9r 16SW105 W84 C~55a1 2016 10 02.07262 21 45 48.792 -43 23 10.05 24.6g 16SW105 W84 C~55a1 2016 10 22.01394 21 44 43.371 -43 13 32.05 22.5i 16SW105 W84 C~55a1 2017 09 12.13355 21 53 21.098 -42 42 18.88 23.7r 16SW105 W84 C~55a1 2017 09 12.13493 21 53 21.140 -42 42 19.03 24.3g 16SW105 W84 C~55a1 2017 10 13.10552 21 50 53.258 -42 34 23.90 23.8i 16SW105 W84 C~55a1 2017 10 21.00733 21 50 30.281 -42 30 16.18 23.8r 16SW105 W84 C~55a1 2017 10 21.00870 21 50 30.288 -42 30 16.26 24.2g 16SW105 W84 C~55a1
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 0.05 0.00 -0.21
2 0.8928 5736.97 -0.11 -592.45 0.15
3 0.8928 5736.96 -0.04 -592.73 -0.16
4 0.8928 5736.87 -0.06 -592.58 -0.06
5 0.8928 5736.82 -0.02 -592.49 -0.01
6 0.8928 5736.79 0.02 -592.43 0.01
7 0.8928 5736.80 0.11 -592.30 0.11
8 1.9249 9692.53 0.15 675.06 0.10
9 1.9249 9692.35 0.04 675.03 0.03
10 1.9467 9372.43 -0.28 968.20 0.27
11 1.9468 9372.68 0.02 968.09 0.11
12 1.9468 9372.48 -0.09 968.10 0.02
13 1.9468 9372.64 0.13 967.97 -0.17
14 2.0014 8945.60 0.07 1782.55 0.18
15 2.8915 14919.03 -0.20 1181.29 0.05
16 2.8915 14919.39 0.24 1180.96 -0.32
17 2.9763 13626.35 -0.04 2293.17 0.00
18 2.9979 13496.33 -0.03 2624.13 0.03
19 2.9979 13496.37 0.02 2624.02 -0.13
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.
16SW105 quality flag:3 Type: 4:3E 4:3E 4:3E Type: 8:6II 8:6II 8:6II axisobj 36.383 36.410 36.357 ecceobj 0.194 0.194 0.193 incobj 30.384 30.385 30.384 qmin 27.560 27.494 27.678 qmax 45.726 45.734 45.586 amean 36.474 36.473 36.474 amin 36.158 36.178 36.146 amax 36.843 36.830 36.860 emean 0.208 0.208 0.206 emin 0.167 0.166 0.167 emax 0.242 0.244 0.238 imean 29.891 29.874 29.925 imin 29.062 29.017 29.141 imax 30.848 30.849 30.853 excite_mean 0.540 0.540 0.540 fracstop 1.000 1.000 1.000 cjmean 2.692 2.692 2.693 libcent 0 181.0 180.3 180.6 libamp 0 38.8 26.3 53.9 libcent 1 177.2 178.2 176.6 libamp 1 98.4 75.2 128.8 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 89.2 89.2 89.3 kozaiamp 25.2 25.6 24.8