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: 16YZ40 # Created Sun Dec 22 02:10:54 2024 # Orbit generated from Bernstein formalism # Fitting 20 observations of 20 # Arc: 0.82y # First observation: 2016/04/02 # Last observation: 2017/01/28 Preliminary a, adot, b, bdot, g, gdot: -0.000013 0.033787 0.000007 -0.008579 0.028216 0.000000 # Chi-squared of fit: 10.77 DOF: 34 RMS: 0.13 # Min/Max residuals: -0.27 0.27 # Exact a, adot, b, bdot, g, gdot: 1.806616E-05 3.210013E-02 -4.471856E-06 -8.456619E-03 2.898506E-02 -2.021475E-03 # Covariance matrix: 1.8515E-13 5.1578E-13 3.9935E-16 -1.3488E-13 2.3711E-13 1.8451E-11 5.1578E-13 5.2662E-10 2.6420E-13 -9.5338E-11 1.7125E-10 1.3070E-08 3.9935E-16 2.6420E-13 1.8424E-13 -2.8013E-13 7.2427E-14 6.2153E-12 -1.3488E-13 -9.5338E-11 -2.8013E-13 1.7859E-11 -3.1643E-11 -2.3839E-09 2.3711E-13 1.7125E-10 7.2427E-14 -3.1643E-11 5.9924E-11 4.3612E-09 1.8451E-11 1.3070E-08 6.2153E-12 -2.3839E-09 4.3612E-09 3.2741E-07 # lat0 lon0 xBary yBary zBary JD0 -14.126045 144.360636 -0.743918 -0.161338 -0.641679 2457480.823679 # Heliocentric elements and errors Epoch: 2457480.5000 = 2016/04/02 Mean Anomaly: 349.06197 +/- 4.127 Argument of Peri: 240.73132 +/- 6.142 Long of Asc Node: 282.64022 +/- 0.014 Inclination: 19.89580 +/- 0.005 Eccentricity: 0.18158180 +/- 0.0056 Semi-Major Axis: 42.69607172 +/- 0.1056 Time of Perihelion: 2460576.6132 +/- 1168.2 Perihelion: 34.94324232 +/- 0.2562 Aphelion: 50.44890111 +/- 0.2715 Period (y) 278.9909 +/- 1.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -28.16604486 +/- 0.0073 Ecliptic Y 19.27331119 +/- 0.0052 Ecliptic Z -8.42019090 +/- 0.0022 Ecliptic XDOT -0.00145771 +/- 0.0000 Ecliptic YDOT -0.00269265 +/- 0.0000 Ecliptic ZDOT -0.00072803 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 35.15232882 +/- 0.0065 Geocenter to KBO 34.50053323 +/- 0.0092 # Hcoef: 8.27
The following table shows the complete astrometric record for 16YZ40. 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 (16YZ40) followed by the observatory code and reference code for the source of the astrometry.
2016 04 02.32289 09 28 02.57 +00 02 55.7 23.5i 16YZ40 T09 C~8Dlp 2016 04 02.33913 09 28 02.51 +00 02 56.2 23.4i 16YZ40 T09 C~8Dlp 2016 04 02.34721 09 28 02.51 +00 02 56.2 23.2i 16YZ40 T09 C~8Dlp 2016 04 02.35235 09 28 02.50 +00 02 56.6 23.5i 16YZ40 T09 C~8Dlp 2016 04 04.24125 09 27 57.10 +00 03 52.2 24.4g 16YZ40 T09 C~8Dlp 2016 04 04.25331 09 27 57.05 +00 03 52.5 24.6g 16YZ40 T09 C~8Dlp 2016 04 04.26390 09 27 57.03 +00 03 52.8 24.5g 16YZ40 T09 C~8Dlp 2016 04 04.27871 09 27 57.01 +00 03 53.3 24.5g 16YZ40 T09 C~8Dlp 2016 12 25.47498 09 42 09.87 -01 30 52.7 23.8r 16YZ40 T09 C~86ue 2016 12 25.47707 09 42 09.88 -01 30 52.7 23.9r 16YZ40 T09 C~86ue 2016 12 25.48752 09 42 09.85 -01 30 53.1 23.8r 16YZ40 T09 C~86ue 2016 12 25.50008 09 42 09.79 -01 30 53.2 23.7r 16YZ40 T09 C~86ue 2017 01 21.37468 09 40 14.65 -01 30 45.8 23.6z 16YZ40 T09 C~86ue 2017 01 21.40688 09 40 14.47 -01 30 45.4 23.0z 16YZ40 T09 C~86ue 2017 01 21.56385 09 40 13.65 -01 30 43.7 23.3z 16YZ40 T09 C~86ue 2017 01 21.62985 09 40 13.32 -01 30 43.1 23.5z 16YZ40 T09 C~86ue 2017 01 21.63790 09 40 13.27 -01 30 43.2 23.6z 16YZ40 T09 C~86ue 2017 01 28.38299 09 39 37.85 -01 29 20.5 24.3g 16YZ40 T09 C~86ue 2017 01 28.41043 09 39 37.69 -01 29 20.4 23.9g 16YZ40 T09 C~86ue 2017 01 28.41954 09 39 37.65 -01 29 19.9 24.1g 16YZ40 T09 C~86ue
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 -0.11 0.00 -0.03
2 0.0000 -1.01 -0.27 0.18 -0.06
3 0.0001 -1.01 0.16 0.18 -0.17
4 0.0001 -1.28 0.16 0.51 0.09
5 0.0053 -95.91 0.02 26.94 0.07
6 0.0053 -96.72 -0.18 26.98 -0.05
7 0.0053 -97.10 -0.03 27.17 -0.01
8 0.0054 -97.54 0.27 27.55 0.16
9 0.7314 13865.91 -0.18 -1223.37 0.09
10 0.7314 13866.05 0.05 -1223.32 0.19
11 0.7315 13865.75 0.22 -1223.85 -0.07
12 0.7315 13864.93 -0.04 -1224.23 -0.14
13 0.8051 12221.87 0.09 -1774.91 -0.05
14 0.8052 12219.18 -0.12 -1775.41 -0.04
15 0.8056 12206.95 -0.20 -1777.76 0.09
16 0.8058 12202.05 0.01 -1778.79 0.10
17 0.8058 12201.37 -0.05 -1779.13 -0.11
18 0.8243 11670.21 0.09 -1872.25 0.07
19 0.8243 11667.90 0.05 -1872.93 -0.26
20 0.8244 11667.17 0.07 -1872.65 0.14
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.
16YZ40 quality flag:1 Type: CENTAURS SCATEXTD 5:3EE axisobj 42.455 42.650 42.391 ecceobj 0.175 0.178 0.176 incobj 19.882 19.898 19.879 qmin 30.081 34.079 33.572 qmax 55.463 51.693 51.374 amean 42.326 42.582 42.327 amin 41.831 42.181 41.922 amax 42.927 43.029 42.798 emean 0.206 0.177 0.138 emin 0.079 0.153 0.061 emax 0.292 0.202 0.204 imean 20.578 21.515 22.344 imin 17.831 20.658 21.037 imax 23.708 22.217 23.661 excite_mean 0.412 0.407 0.406 fracstop 1.000 1.000 1.000 cjmean 2.878 2.883 2.882 libcent 0 -180.0 -180.0 181.1 libamp 0 -180.0 -180.0 110.9 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 281.6 181.4 189.1 kozaiamp 53.5 179.9 179.9