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: 16WB75 # Created Sun Dec 22 02:10:54 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 12 observations of 12 # Arc: 6.20y # First observation: 2015/08/23 # Last observation: 2021/11/05 # Chi-squared of fit: 4.00 DOF: 18 RMS: 0.10 # Min/Max residuals: -0.21 0.21 # Exact a, adot, b, bdot, g, gdot: 1.696899E-05 2.905278E-02 -2.734531E-06 -3.922742E-03 2.676855E-02 3.083229E-03 # Covariance matrix: 1.3799E-12 -1.0146E-13 -3.8943E-14 1.8772E-14 7.9944E-13 -1.9000E-13 -1.0146E-13 1.0367E-12 1.5441E-13 -1.4940E-13 1.1339E-12 5.5364E-12 -3.8943E-14 1.5441E-13 3.9180E-13 -1.0743E-13 1.4440E-13 8.5160E-13 1.8772E-14 -1.4940E-13 -1.0743E-13 5.1359E-14 -1.5501E-13 -8.2224E-13 7.9944E-13 1.1339E-12 1.4440E-13 -1.5501E-13 1.9384E-12 6.1534E-12 -1.9000E-13 5.5364E-12 8.5160E-13 -8.2224E-13 6.1534E-12 3.0423E-11 # lat0 lon0 xBary yBary zBary JD0 -19.356532 16.975201 0.743020 -0.228586 -0.651203 2457257.888899 # Heliocentric elements and errors Epoch: 2457258.5000 = 2015/08/24 Mean Anomaly: 22.05693 +/- 0.042 Argument of Peri: 215.71075 +/- 0.066 Long of Asc Node: 129.48057 +/- 0.001 Inclination: 20.61722 +/- 0.000 Eccentricity: 0.18296255 +/- 0.0001 Semi-Major Axis: 45.43430911 +/- 0.0078 Time of Perihelion: 2450404.9290 +/- 13.2 Perihelion: 37.12153198 +/- 0.0082 Aphelion: 53.74708624 +/- 0.0106 Period (y) 306.2556 +/- 0.08 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 34.58327506 +/- 0.0018 Ecliptic Y 9.78114427 +/- 0.0005 Ecliptic Z -12.38201208 +/- 0.0006 Ecliptic XDOT -0.00071214 +/- 0.0000 Ecliptic YDOT 0.00288368 +/- 0.0000 Ecliptic ZDOT -0.00048300 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 38.01294268 +/- 0.0016 Geocenter to KBO 37.35723394 +/- 0.0019 # Hcoef: 7.89
The following table shows the complete astrometric record for 16WB75. 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 (16WB75) followed by the observatory code and reference code for the source of the astrometry.
2015 08 23.38811 01 32 19.789 -11 13 01.26 23.5r 16WB75 W84 C~55bR 2016 11 30.06859 01 31 58.238 -11 31 35.67 23.6r 16WB75 W84 C~55bR 2016 11 30.06996 01 31 58.205 -11 31 35.61 24.5g 16WB75 W84 C~55bR 2016 12 05.03429 01 31 42.780 -11 31 03.05 23.0z 16WB75 W84 C~55bR 2017 11 09.19148 01 39 57.226 -11 03 33.30 23.1i 16WB75 W84 C~55bR 2017 11 18.16587 01 39 17.628 -11 05 01.81 23.8r 16WB75 W84 C~55bR 2017 11 18.16726 01 39 17.628 -11 05 01.98 24.4g 16WB75 W84 C~55bR 2017 12 22.12613 01 37 35.716 -11 00 43.05 24.0r 16WB75 W84 C~55bR 2018 11 30.09558 01 45 02.717 -10 38 34.58 24.4g 16WB75 W84 C~55bR 2021 11 05.241720 02 06 06.282 -09 12 14.16 23.7G 16WB75 G37 C~5BeU 2021 11 05.296640 02 06 06.002 -09 12 15.17 16WB75 G37 C~5BeU 2021 11 05.351860 02 06 05.730 -09 12 16.16 16WB75 G37 C~5BeU
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 0.00 0.00 0.09
2 1.2722 0.00 0.21 0.00 0.07
3 1.2722 0.00 -0.21 0.00 0.12
4 1.2858 0.00 -0.00 0.00 -0.18
5 2.2144 0.00 -0.09 0.00 -0.06
6 2.2390 0.00 -0.01 0.00 -0.02
7 2.2390 0.00 0.08 0.00 -0.18
8 2.3319 0.00 0.12 0.00 0.07
9 3.2709 0.00 -0.02 0.00 0.09
10 6.2036 0.00 0.06 0.00 -0.02
11 6.2037 0.00 -0.05 0.00 -0.00
12 6.2039 0.00 -0.02 0.00 0.03
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.
16WB75 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 45.985 45.985 45.985 ecceobj 0.193 0.193 0.193 incobj 20.596 20.596 20.596 qmin 36.243 36.214 36.243 qmax 55.555 55.495 55.495 amean 45.672 45.650 45.646 amin 45.279 45.251 45.259 amax 46.119 46.104 46.108 emean 0.188 0.188 0.188 emin 0.173 0.173 0.173 emax 0.205 0.205 0.205 imean 19.098 19.094 19.111 imin 18.558 18.558 18.559 imax 19.649 19.615 19.635 excite_mean 0.378 0.377 0.377 fracstop 1.000 1.000 1.000 cjmean 2.945 2.945 2.945 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 184.6 184.4 184.9 kozaiamp 180.0 180.0 180.0