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: 16YX39 # Created Tue Apr 1 01:11:00 2025 # Orbit generated from Bernstein formalism # Fitting 18 observations of 18 # Arc: 70.95d # First observation: 2016/12/25 # Last observation: 2017/03/06 Preliminary a, adot, b, bdot, g, gdot: 0.000002 0.019661 0.000002 -0.009432 0.023640 0.000000 # Chi-squared of fit: 18.06 DOF: 30 RMS: 0.18 # Min/Max residuals: -0.29 0.58 # Exact a, adot, b, bdot, g, gdot: 1.382888E-05 1.930745E-02 -6.155453E-06 -9.368449E-03 2.341311E-02 5.718655E-03 # Covariance matrix: 3.5938E-13 -5.0255E-12 1.2288E-14 -6.3696E-13 7.6165E-14 1.6427E-10 -5.0255E-12 3.4415E-09 1.9470E-11 1.8645E-10 7.3326E-10 3.3097E-08 1.2288E-14 1.9470E-11 3.6658E-13 -7.5561E-13 4.3957E-12 2.4448E-10 -6.3696E-13 1.8645E-10 -7.5561E-13 2.9128E-11 3.6626E-11 9.8291E-10 7.6165E-14 7.3326E-10 4.3957E-12 3.6626E-11 1.6275E-10 8.5114E-09 1.6427E-10 3.3097E-08 2.4448E-10 9.8291E-10 8.5114E-09 6.7366E-07 # lat0 lon0 xBary yBary zBary JD0 -12.987828 149.881892 0.820660 -0.123136 -0.534758 2457747.965269 # Heliocentric elements and errors Epoch: 2457740.5000 = 2016/12/18 Mean Anomaly: 79.20032 +/- 6.052 Argument of Peri: 100.92640 +/- 3.270 Long of Asc Node: 304.33764 +/- 0.081 Inclination: 28.81839 +/- 0.075 Eccentricity: 0.23772883 +/- 0.0333 Semi-Major Axis: 42.75270090 +/- 0.8464 Time of Perihelion: 2435277.4761 +/- 1581.5 Perihelion: 32.58915120 +/- 1.5618 Aphelion: 52.91625061 +/- 1.7665 Period (y) 279.5462 +/- 8.30 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -36.06620360 +/- 0.0196 Ecliptic Y 21.86427808 +/- 0.0114 Ecliptic Z -9.59936792 +/- 0.0052 Ecliptic XDOT -0.00148101 +/- 0.0001 Ecliptic YDOT -0.00175622 +/- 0.0000 Ecliptic ZDOT -0.00121783 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.25465943 +/- 0.0174 Geocenter to KBO 42.71111874 +/- 0.0233 # Hcoef: 8.68
The following table shows the complete astrometric record for 16YX39. 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 (16YX39) followed by the observatory code and reference code for the source of the astrometry.
2016 12 25.46448 09 49 48.00 -00 40 14.7 25.1r 16YX39 T09 C~7xTe 2016 12 25.48124 09 49 47.97 -00 40 14.8 25.5r 16YX39 T09 C~7xTe 2016 12 25.49379 09 49 47.94 -00 40 15.0 25.2r 16YX39 T09 C~7xTe 2016 12 25.50426 09 49 47.89 -00 40 15.0 24.9r 16YX39 T09 C~7xTe 2017 01 26.45718 09 47 48.14 -00 39 10.0 25.2z 16YX39 T09 C~7xTe 2017 01 26.46057 09 47 48.09 -00 39 09.7 24.3z 16YX39 T09 C~7xTe 2017 01 26.47468 09 47 48.03 -00 39 09.2 24.1z 16YX39 T09 C~7xTe 2017 01 26.48538 09 47 47.97 -00 39 09.2 24.7z 16YX39 T09 C~7xTe 2017 01 26.57764 09 47 47.56 -00 39 08.5 24.9z 16YX39 T09 C~7xTe 2017 01 28.42233 09 47 39.22 -00 38 47.3 26.0g 16YX39 T09 C~7xTe 2017 01 28.43044 09 47 39.17 -00 38 47.0 25.3g 16YX39 T09 C~7xTe 2017 01 28.45712 09 47 39.06 -00 38 47.2 25.8g 16YX39 T09 C~7xTe 2017 01 28.46760 09 47 38.99 -00 38 46.8 25.9g 16YX39 T09 C~7xTe 2017 03 06.35845 09 44 46.93 -00 27 14.3 24.9i 16YX39 T09 C~7xTe 2017 03 06.38592 09 44 46.82 -00 27 13.6 24.8i 16YX39 T09 C~7xTe 2017 03 06.40280 09 44 46.73 -00 27 13.0 24.7i 16YX39 T09 C~7xTe 2017 03 06.40546 09 44 46.73 -00 27 13.3 24.3i 16YX39 T09 C~7xTe 2017 03 06.41622 09 44 46.69 -00 27 12.8 24.4i 16YX39 T09 C~7xTe
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 -0.16 0.00 -0.04
2 0.0000 -0.39 0.08 -0.25 0.07
3 0.0001 -0.74 0.19 -0.59 -0.00
4 0.0001 -1.45 -0.12 -0.85 -0.03
5 0.0876 -1710.27 0.58 -557.96 -0.26
6 0.0876 -1711.08 0.00 -557.94 -0.20
7 0.0876 -1712.10 -0.05 -557.78 0.16
8 0.0877 -1712.94 -0.17 -558.09 -0.01
9 0.0879 -1718.96 0.11 -559.55 -0.22
10 0.0930 -1843.72 -0.02 -582.70 0.21
11 0.0930 -1844.52 -0.26 -582.68 0.34
12 0.0931 -1846.00 0.10 -583.44 -0.07
13 0.0931 -1847.13 -0.29 -583.42 0.08
14 0.1941 -4509.25 -0.09 -821.79 -0.10
15 0.1942 -4511.04 0.08 -821.71 0.01
16 0.1942 -4512.51 -0.20 -821.61 0.12
17 0.1942 -4512.41 0.09 -821.89 -0.16
18 0.1943 -4513.15 0.12 -821.63 0.11
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.
16YX39 quality flag:1 Type: SCATNEAR SCATNEAR CENTAURR axisobj 42.712 45.723 40.716 ecceobj 0.244 0.328 0.170 incobj 28.830 28.640 29.034 qmin 31.985 30.485 28.833 qmax 54.441 61.145 53.034 amean 42.766 45.492 40.696 amin 42.267 45.016 39.988 amax 43.415 46.075 41.173 emean 0.226 0.291 0.251 emin 0.199 0.275 0.158 emax 0.254 0.329 0.289 imean 30.715 31.213 28.603 imin 30.008 30.083 27.577 imax 31.347 31.635 30.706 excite_mean 0.558 0.594 0.541 fracstop 1.000 1.000 0.759 cjmean 2.699 2.672 2.714 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 181.6 192.8 178.7 kozaiamp 180.0 179.9 180.0