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: 16TW94 # Created Sat Apr 20 01:18:08 2024 # Orbit generated from Bernstein formalism # Fitting 9 observations of 11 # Arc: 3.20y # First observation: 2014/10/29 # Last observation: 2018/01/09 Preliminary a, adot, b, bdot, g, gdot: 0.000122 0.023769 -0.000008 -0.002327 0.024640 0.000000 # Chi-squared of fit: 3.87 DOF: 12 RMS: 0.12 # Min/Max residuals: -0.22 0.24 # Exact a, adot, b, bdot, g, gdot: 1.431180E-05 2.404165E-02 -8.190792E-07 -2.296486E-03 2.452843E-02 1.507739E-03 # Covariance matrix: 4.8318E-13 -2.3776E-13 -1.6609E-16 -3.9608E-15 3.5822E-14 -7.4762E-13 -2.3776E-13 1.9450E-12 -7.0419E-14 -5.2753E-14 1.0453E-12 3.4805E-11 -1.6609E-16 -7.0419E-14 4.7942E-13 -2.0352E-13 -5.2551E-14 -1.3235E-12 -3.9608E-15 -5.2753E-14 -2.0352E-13 1.4290E-13 -7.2269E-14 -9.0075E-13 3.5822E-14 1.0453E-12 -5.2551E-14 -7.2269E-14 1.0662E-12 1.8858E-11 -7.4762E-13 3.4805E-11 -1.3235E-12 -9.0075E-13 1.8858E-11 6.7377E-10 # lat0 lon0 xBary yBary zBary JD0 -29.075033 32.685103 -0.048416 -0.482690 -0.868501 2456959.831218 # Heliocentric elements and errors Epoch: 2456950.5000 = 2014/10/20 Mean Anomaly: 63.82775 +/- 0.196 Argument of Peri: 189.08333 +/- 0.306 Long of Asc Node: 134.25615 +/- 0.002 Inclination: 28.89986 +/- 0.000 Eccentricity: 0.06543034 +/- 0.0010 Semi-Major Axis: 42.71664793 +/- 0.0075 Time of Perihelion: 2438870.3836 +/- 55.3 Perihelion: 39.92168320 +/- 0.0451 Aphelion: 45.51161265 +/- 0.0453 Period (y) 279.1926 +/- 0.07 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 30.79650646 +/- 0.0013 Ecliptic Y 19.82074703 +/- 0.0008 Ecliptic Z -19.81197818 +/- 0.0008 Ecliptic XDOT -0.00143462 +/- 0.0000 Ecliptic YDOT 0.00226591 +/- 0.0000 Ecliptic ZDOT -0.00030571 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.63893973 +/- 0.0011 Geocenter to KBO 40.76901815 +/- 0.0017 # Hcoef: 7.45
The following table shows the complete astrometric record for 16TW94. 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 (16TW94) followed by the observatory code and reference code for the source of the astrometry.
2014 10 29.33044 02 41 39.142 -14 57 29.81 23.8r 16TW94 W84 C~55aG 2014 11 03.31203 02 41 14.999 -14 59 20.81 23.3r 16TW94 W84 C~55aG 2014 12 16.19628 02 38 07.541 -15 01 05.34 23.3i 16TW94 W84 C~55aG 2016 09 24.33328 02 55 01.789 -13 54 23.75 23.7r 16TW94 W84 C~55aG 2016 09 25.25373 02 54 58.799 -13 55 02.64 24.2g 16TW94 W84 C~55aG 2016 10 07.34003 02 54 14.626 -14 03 04.13 23.9r 16TW94 807 C~2AEF 2016 10 08.27279 02 54 10.873 -14 03 38.82 24.0r 16TW94 807 C~2AEF 2016 12 05.22098 02 49 43.848 -14 20 46.73 23.7r 16TW94 W84 C~55aG 2016 12 05.22371 02 49 43.846 -14 20 46.80 24.8g 16TW94 W84 C~55aG 2017 02 02.06665 02 47 48.318 -13 53 01.43 23.0z 16TW94 W84 C~55aG 2018 01 09.12005 02 53 21.816 -13 47 47.25 22.9r 16TW94 W84 C~55aG
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 0.24 0.00 -0.14
2 0.0136 -366.64 -0.15 17.03 0.15
3 0.1310 -2952.66 -0.08 854.50 -0.07
4 1.9056 12259.51 0.14 -579.87 0.06
5 1.9081 12204.70 -0.22 -600.50 -0.02
6 1.9412 11429.05 ( 0.03) -818.73 ( 0.53)
7 1.9437 11365.43 ( 0.12) -831.49 ( 0.60)
8 2.1024 7363.06 -0.01 -404.20 0.08
9 2.1024 7363.01 0.09 -404.25 -0.05
10 2.2635 6379.42 -0.05 1749.22 0.08
11 3.1972 11039.29 0.03 314.71 -0.10
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.
16TW94 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 43.073 43.099 43.048 ecceobj 0.072 0.074 0.069 incobj 28.877 28.877 28.877 qmin 38.994 38.928 39.061 qmax 46.789 46.921 46.675 amean 42.769 42.794 42.745 amin 42.441 42.469 42.429 amax 43.117 43.144 43.090 emean 0.072 0.074 0.070 emin 0.060 0.062 0.058 emax 0.085 0.088 0.083 imean 27.492 27.490 27.493 imin 27.175 27.175 27.191 imax 27.818 27.824 27.825 excite_mean 0.467 0.468 0.467 fracstop 1.000 1.000 1.000 cjmean 2.814 2.814 2.814 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 182.8 183.1 183.2 kozaiamp 179.9 180.0 180.0