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: 16UQ273 # Created Sun Dec 22 02:10:54 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 18 observations of 18 # Arc: 8.30y # First observation: 2015/08/18 # Last observation: 2023/12/07 # Chi-squared of fit: 4.64 DOF: 30 RMS: 0.09 # Min/Max residuals: -0.23 0.30 # Exact a, adot, b, bdot, g, gdot: 1.460666E-05 2.444189E-02 6.504278E-06 1.095711E-02 2.577227E-02 3.642049E-03 # Covariance matrix: 6.0203E-13 -1.0890E-13 9.1714E-14 -6.1030E-14 3.1361E-13 -6.0334E-13 -1.0890E-13 2.2209E-13 -1.1210E-13 1.0498E-13 1.9640E-13 1.0858E-12 9.1714E-14 -1.1210E-13 2.3814E-13 -9.1660E-14 -5.5902E-14 -6.0574E-13 -6.1030E-14 1.0498E-13 -9.1660E-14 6.5650E-14 7.6119E-14 5.5433E-13 3.1361E-13 1.9640E-13 -5.5902E-14 7.6119E-14 5.5126E-13 8.1392E-13 -6.0334E-13 1.0858E-12 -6.0574E-13 5.5433E-13 8.1392E-13 5.7188E-12 # lat0 lon0 xBary yBary zBary JD0 -16.955266 20.098739 0.831603 -0.169517 -0.556595 2457252.907119 # Heliocentric elements and errors Epoch: 2457252.5000 = 2015/08/18 Mean Anomaly: 44.71414 +/- 0.020 Argument of Peri: 264.93066 +/- 0.030 Long of Asc Node: 52.03865 +/- 0.000 Inclination: 28.72602 +/- 0.000 Eccentricity: 0.14824768 +/- 0.0001 Semi-Major Axis: 43.38038653 +/- 0.0049 Time of Perihelion: 2444290.2343 +/- 6.3 Perihelion: 36.94934492 +/- 0.0058 Aphelion: 49.81142815 +/- 0.0070 Period (y) 285.7251 +/- 0.05 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 35.68309341 +/- 0.0010 Ecliptic Y 12.17312959 +/- 0.0004 Ecliptic Z -11.31522680 +/- 0.0003 Ecliptic XDOT -0.00022795 +/- 0.0000 Ecliptic YDOT 0.00267586 +/- 0.0000 Ecliptic ZDOT 0.00100063 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 39.36364743 +/- 0.0009 Geocenter to KBO 38.80133507 +/- 0.0011 # Hcoef: 6.93
The following table shows the complete astrometric record for 16UQ273. 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 (16UQ273) followed by the observatory code and reference code for the source of the astrometry.
2015 08 18.40633 01 39 43.699 -07 51 47.98 22.6r 16UQ273 W84 C~55b1 2015 08 18.40770 01 39 43.685 -07 51 48.12 23.4g 16UQ273 W84 C~55b1 2016 10 28.18004 01 39 05.281 -07 17 31.79 23.1r 16UQ273 W84 C~55b1 2016 11 03.24731 01 38 35.140 -07 18 58.50 23.0r 16UQ273 W84 C~55b1 2016 11 04.15990 01 38 30.686 -07 19 09.71 22.7i 16UQ273 W84 C~55b1 2016 11 04.16127 01 38 30.687 -07 19 09.75 23.4g 16UQ273 W84 C~55b1 2016 11 28.09529 01 36 46.232 -07 20 43.22 22.6i 16UQ273 W84 C~55b1 2016 11 28.09667 01 36 46.218 -07 20 43.36 23.0r 16UQ273 W84 C~55b1 2016 11 28.17735 01 36 45.914 -07 20 42.91 23.2g 16UQ273 W84 C~55b1 2017 11 16.11931 01 41 51.721 -06 14 26.19 22.8r 16UQ273 W84 C~55b1 2017 11 17.13031 01 41 47.237 -06 14 31.38 22.6i 16UQ273 W84 C~55b1 2017 11 18.12651 01 41 42.866 -06 14 35.64 23.2g 16UQ273 W84 C~55b1 2018 09 21.36019 01 50 34.439 -04 49 36.47 23.1i 16UQ273 W84 C~55b1 2018 11 07.19230 01 46 47.724 -05 06 57.55 22.8r 16UQ273 W84 C~55b1 2018 11 07.19367 01 46 47.722 -05 06 57.62 23.4g 16UQ273 W84 C~55b1 2023 12 07.076830 02 05 16.780 +00 15 36.56 22.6G 16UQ273 G37 C~7dL0 2023 12 07.127480 02 05 16.587 +00 15 36.60 16UQ273 G37 C~7dL0 2023 12 07.179360 02 05 16.432 +00 15 36.41 16UQ273 G37 C~7dL0
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 0.06 0.00 0.07
2 0.0000 0.00 -0.11 0.00 -0.03
3 1.1958 0.00 0.08 0.00 -0.01
4 1.2124 0.00 0.01 0.00 0.06
5 1.2149 0.00 -0.06 0.00 -0.02
6 1.2149 0.00 0.06 0.00 -0.04
7 1.2805 0.00 0.11 0.00 0.07
8 1.2805 0.00 -0.03 0.00 -0.07
9 1.2807 0.00 -0.01 0.00 0.00
10 2.2470 0.00 -0.03 0.00 0.08
11 2.2498 0.00 -0.02 0.00 -0.06
12 2.2525 0.00 -0.04 0.00 -0.02
13 3.0936 0.00 0.05 0.00 -0.01
14 3.2219 0.00 -0.00 0.00 0.03
15 3.2219 0.00 0.07 0.00 -0.03
16 8.3030 0.00 -0.12 0.00 0.08
17 8.3031 0.00 -0.23 0.00 0.08
18 8.3033 0.00 0.30 0.00 -0.15
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.
16UQ273 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 43.836 43.836 43.836 ecceobj 0.155 0.155 0.155 incobj 28.665 28.665 28.665 qmin 36.501 36.476 36.517 qmax 50.956 50.991 50.931 amean 43.584 43.585 43.583 amin 43.228 43.218 43.218 amax 43.969 43.988 43.974 emean 0.141 0.141 0.140 emin 0.122 0.122 0.122 emax 0.160 0.161 0.159 imean 27.828 27.825 27.832 imin 27.396 27.391 27.404 imax 28.262 28.264 28.268 excite_mean 0.488 0.488 0.488 fracstop 1.000 1.000 1.000 cjmean 2.798 2.798 2.798 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 177.7 177.9 177.5 kozaiamp 180.0 179.9 179.9