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: 16YY39 # Created Sun Dec 22 02:10:54 2024 # Orbit generated from Bernstein formalism # Fitting 20 observations of 20 # Arc: 1.79y # First observation: 2016/04/04 # Last observation: 2018/01/17 Preliminary a, adot, b, bdot, g, gdot: 0.000218 0.037467 -0.000009 -0.001531 0.033970 0.000000 # Chi-squared of fit: 11.16 DOF: 34 RMS: 0.13 # Min/Max residuals: -0.31 0.36 # Exact a, adot, b, bdot, g, gdot: 1.744831E-05 3.755769E-02 -2.641555E-07 -1.522166E-03 3.426526E-02 9.752913E-03 # Covariance matrix: 4.8875E-13 -6.9597E-13 -4.9136E-15 1.2325E-14 -1.8198E-13 -5.0734E-12 -6.9597E-13 2.5371E-12 1.4802E-14 -9.7201E-14 -5.9125E-14 2.2673E-11 -4.9136E-15 1.4802E-14 3.5853E-13 -3.7874E-13 5.7294E-15 2.1426E-13 1.2325E-14 -9.7201E-14 -3.7874E-13 5.0676E-13 9.5852E-15 -1.0287E-12 -1.8198E-13 -5.9125E-14 5.7294E-15 9.5852E-15 4.5436E-13 2.9686E-12 -5.0734E-12 2.2673E-11 2.1426E-13 -1.0287E-12 2.9686E-12 2.8167E-10 # lat0 lon0 xBary yBary zBary JD0 -13.496809 145.634269 -0.751495 -0.152447 -0.635785 2457482.744867 # Heliocentric elements and errors Epoch: 2457480.5000 = 2016/04/02 Mean Anomaly: 79.85135 +/- 0.078 Argument of Peri: 149.95850 +/- 0.040 Long of Asc Node: 246.18929 +/- 0.005 Inclination: 13.35938 +/- 0.000 Eccentricity: 0.27493337 +/- 0.0004 Semi-Major Axis: 29.05977983 +/- 0.0078 Time of Perihelion: 2444788.8919 +/- 11.2 Perihelion: 21.07027654 +/- 0.0121 Aphelion: 37.04928312 +/- 0.0146 Period (y) 156.6559 +/- 0.06 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -24.39267605 +/- 0.0005 Ecliptic Y 15.76493461 +/- 0.0003 Ecliptic Z -6.81130135 +/- 0.0001 Ecliptic XDOT -0.00229587 +/- 0.0000 Ecliptic YDOT -0.00207239 +/- 0.0000 Ecliptic ZDOT -0.00030013 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 29.83168842 +/- 0.0004 Geocenter to KBO 29.18407623 +/- 0.0006 # Hcoef: 9.97
The following table shows the complete astrometric record for 16YY39. 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 (16YY39) followed by the observatory code and reference code for the source of the astrometry.
2016 04 04.244078 09 33 32.41 +00 14 26.6 16YY39 T09 C~81Bh 2016 04 04.255396 09 33 32.37 +00 14 27.0 16YY39 T09 C~81Bh 2016 04 04.265999 09 33 32.34 +00 14 27.5 16YY39 T09 C~81Bh 2016 12 25.46448 09 50 33.36 -01 16 53.3 24.9r 16YY39 T09 C~7xTe 2016 12 25.48961 09 50 33.25 -01 16 53.3 25.2r 16YY39 T09 C~7xTe 2016 12 25.49379 09 50 33.25 -01 16 53.6 25.1r 16YY39 T09 C~7xTe 2017 01 26.45718 09 47 54.69 -01 12 59.7 24.3z 16YY39 T09 C~7xTe 2017 01 26.47468 09 47 54.59 -01 12 59.7 24.5z 16YY39 T09 C~7xTe 2017 01 26.49073 09 47 54.49 -01 12 59.2 24.0z 16YY39 T09 C~7xTe 2017 01 26.49344 09 47 54.48 -01 12 59.5 24.5z 16YY39 T09 C~7xTe 2017 01 28.42233 09 47 42.72 -01 12 18.6 25.6g 16YY39 T09 C~7xTe 2017 01 28.44025 09 47 42.60 -01 12 18.4 25.4g 16YY39 T09 C~7xTe 2017 01 28.45292 09 47 42.52 -01 12 17.9 25.5g 16YY39 T09 C~7xTe 2017 01 28.46551 09 47 42.45 -01 12 17.4 25.0g 16YY39 T09 C~7xTe 2017 03 04.39457 09 44 01.57 -00 53 42.1 24.3i 16YY39 T09 C~7xTe 2017 03 04.39725 09 44 01.55 -00 53 42.1 24.0i 16YY39 T09 C~7xTe 2017 03 04.43505 09 44 01.33 -00 53 40.4 24.4i 16YY39 T09 C~7xTe 2017 03 06.38592 09 43 49.76 -00 52 23.4 24.7i 16YY39 T09 C~7xTe 2017 03 06.39997 09 43 49.67 -00 52 22.5 24.3i 16YY39 T09 C~7xTe 2018 01 17.577575 09 56 33.56 -02 01 21.0 16YY39 T09 C~81Bh
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 -0.02 0.00 -0.09
2 0.0000 -0.70 -0.02 0.18 -0.13
3 0.0001 -1.29 0.04 0.51 -0.02
4 0.7261 16297.24 0.14 -151.15 0.05
5 0.7262 16295.67 -0.18 -151.69 0.10
6 0.7262 16295.77 0.12 -151.97 -0.08
7 0.8137 13960.14 -0.25 -711.73 0.13
8 0.8138 13958.72 -0.01 -712.22 -0.16
9 0.8138 13957.13 -0.08 -712.24 -0.00
10 0.8138 13957.09 0.13 -712.57 -0.31
11 0.8191 13776.25 0.09 -731.77 0.11
12 0.8192 13774.48 0.04 -732.18 -0.11
13 0.8192 13773.18 -0.04 -732.10 0.10
14 0.8192 13772.02 0.01 -731.97 0.36
15 0.9149 10264.85 -0.05 -764.55 0.08
16 0.9149 10264.57 -0.07 -764.65 -0.04
17 0.9150 10260.88 0.01 -764.13 0.21
18 0.9203 10071.24 0.17 -748.29 -0.14
19 0.9203 10069.66 -0.03 -747.88 0.16
20 1.7887 22326.55 -0.00 -908.21 -0.22
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.
16YY39 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 29.099 29.124 29.073 ecceobj 0.281 0.281 0.280 incobj 13.338 13.338 13.338 qmin 20.442 20.233 20.202 qmax 37.639 37.458 38.672 amean 28.518 28.515 28.995 amin 27.662 27.679 27.579 amax 29.273 29.192 29.855 emean 0.270 0.266 0.259 emin 0.242 0.238 0.213 emax 0.286 0.286 0.309 imean 14.320 14.229 15.275 imin 13.893 13.691 13.323 imax 14.711 14.606 16.901 excite_mean 0.366 0.362 0.371 fracstop 0.013 0.017 0.054 cjmean 2.876 2.879 2.868 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 193.7 208.7 254.4 kozaiamp 44.2 52.7 179.4