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: 16SY105 # Created Sun Nov 24 02:10:44 2024 # Orbit generated from Bernstein formalism # Fitting 9 observations of 9 # Arc: 3.16y # First observation: 2015/09/12 # Last observation: 2018/11/08 Preliminary a, adot, b, bdot, g, gdot: 0.000219 0.033848 -0.000011 -0.009526 0.032730 0.000000 # Chi-squared of fit: 6.56 DOF: 12 RMS: 0.15 # Min/Max residuals: -0.33 0.27 # Exact a, adot, b, bdot, g, gdot: 1.831644E-05 3.378768E-02 -4.673531E-06 -9.290599E-03 2.951705E-02 -3.682802E-03 # Covariance matrix: 1.2524E-12 -1.2986E-12 -1.0567E-13 2.5840E-13 -7.3438E-13 -8.6964E-12 -1.2986E-12 2.6517E-12 2.2362E-13 -7.9824E-13 4.2388E-12 2.1310E-11 -1.0567E-13 2.2362E-13 8.0991E-13 -4.0011E-13 2.0016E-13 2.0122E-12 2.5840E-13 -7.9824E-13 -4.0011E-13 4.7144E-13 -1.8861E-12 -6.6654E-12 -7.3438E-13 4.2388E-12 2.0016E-13 -1.8861E-12 1.6304E-11 3.2618E-11 -8.6964E-12 2.1310E-11 2.0122E-12 -6.6654E-12 3.2618E-11 1.8577E-10 # lat0 lon0 xBary yBary zBary JD0 -22.535001 -61.209145 -0.773918 -0.248600 -0.599550 2457277.518599 # Heliocentric elements and errors Epoch: 2457270.5000 = 2015/09/05 Mean Anomaly: 345.96615 +/- 0.053 Argument of Peri: 261.96268 +/- 0.090 Long of Asc Node: 65.17698 +/- 0.002 Inclination: 26.38792 +/- 0.000 Eccentricity: 0.25402292 +/- 0.0005 Semi-Major Axis: 45.41634775 +/- 0.0352 Time of Perihelion: 2461628.5392 +/- 15.5 Perihelion: 33.87955440 +/- 0.0359 Aphelion: 56.95314110 +/- 0.0505 Period (y) 306.0741 +/- 0.36 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 16.05840046 +/- 0.0021 Ecliptic Y -27.62013443 +/- 0.0037 Ecliptic Z -12.98409444 +/- 0.0018 Ecliptic XDOT 0.00243371 +/- 0.0000 Ecliptic YDOT 0.00206888 +/- 0.0000 Ecliptic ZDOT -0.00066498 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 34.48667510 +/- 0.0032 Geocenter to KBO 33.87872860 +/- 0.0046 # Hcoef: 8.32
The following table shows the complete astrometric record for 16SY105. 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 (16SY105) followed by the observatory code and reference code for the source of the astrometry.
2015 09 12.01781 20 28 01.100 -42 20 46.89 23.6r 16SY105 W84 C~55a1 2016 09 23.00046 20 38 04.263 -42 16 29.33 24.0g 16SY105 W84 C~55a1 2016 09 30.01330 20 37 42.518 -42 13 49.09 24.3g 16SY105 W84 C~55a1 2017 09 23.03819 20 48 58.483 -42 11 45.02 23.9r 16SY105 W84 C~55a1 2017 10 11.02207 20 48 09.547 -42 04 04.79 23.8g 16SY105 W84 C~55a1 2017 10 16.07103 20 48 04.043 -42 01 15.25 24.2r 16SY105 W84 C~55a1 2017 10 17.08881 20 48 03.395 -42 00 39.42 24.8g 16SY105 W84 C~55a1 2018 09 15.22634 21 00 31.734 -42 04 51.78 23.7g 16SY105 W84 C~55a1 2018 11 08.06878 20 59 05.527 -41 37 19.63 23.6r 16SY105 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 -0.04 0.00 -0.06
2 1.0321 6508.13 -0.03 -1582.26 0.10
3 1.0513 6322.66 0.13 -1359.31 -0.11
4 2.0315 13536.68 0.27 -3516.88 -0.18
5 2.0808 13164.34 -0.33 -2906.24 0.22
6 2.0946 13159.57 -0.01 -2725.61 0.21
7 2.0974 13164.03 -0.00 -2689.26 -0.05
8 3.0095 20998.86 -0.03 -5719.65 0.08
9 3.1569 20664.88 0.05 -3824.63 -0.21
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.
16SY105 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 45.528 45.621 45.435 ecceobj 0.258 0.259 0.257 incobj 26.447 26.447 26.448 qmin 33.091 33.484 32.582 qmax 58.288 58.581 58.956 amean 45.548 45.705 45.491 amin 45.008 45.254 45.060 amax 46.106 46.304 46.031 emean 0.246 0.244 0.265 emin 0.220 0.223 0.240 emax 0.269 0.265 0.282 imean 25.373 25.500 24.757 imin 24.646 24.791 24.168 imax 26.128 26.168 25.507 excite_mean 0.494 0.495 0.495 fracstop 1.000 1.000 1.000 cjmean 2.816 2.816 2.815 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 185.3 177.4 178.9 kozaiamp 180.0 179.9 179.9