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: 16GW367 # Created Mon Apr 28 01:10:48 2025 # Orbit generated from Bernstein formalism # Fitting 16 observations of 16 # Arc: 83.93d # First observation: 2016/03/16 # Last observation: 2016/06/08 Preliminary a, adot, b, bdot, g, gdot: -0.000035 0.040373 -0.000006 -0.008549 0.028992 0.000000 # Chi-squared of fit: 6.54 DOF: 26 RMS: 0.11 # Min/Max residuals: -0.33 0.22 # Exact a, adot, b, bdot, g, gdot: 2.237269E-05 3.876755E-02 -5.156984E-06 -8.608519E-03 2.876929E-02 -5.180475E-03 # Covariance matrix: 2.9525E-13 2.8744E-12 -1.5305E-14 -2.2852E-13 1.4532E-12 1.4367E-10 2.8744E-12 7.6330E-09 -2.9405E-11 1.6488E-10 1.3046E-09 -7.4941E-09 -1.5305E-14 -2.9405E-11 2.9190E-13 -1.9435E-12 -5.0335E-12 3.0019E-11 -2.2852E-13 1.6488E-10 -1.9435E-12 2.4022E-11 2.6202E-11 -5.7358E-10 1.4532E-12 1.3046E-09 -5.0335E-12 2.6202E-11 2.2830E-10 -3.3378E-10 1.4367E-10 -7.4941E-09 3.0019E-11 -5.7358E-10 -3.3378E-10 1.9791E-07 # lat0 lon0 xBary yBary zBary JD0 11.079482 -149.959287 0.555681 0.157896 -0.805587 2457463.960299 # Heliocentric elements and errors Epoch: 2457460.5000 = 2016/03/13 Mean Anomaly: 358.25237 +/- 0.142 Argument of Peri: 157.34385 +/- 1.367 Long of Asc Node: 69.63399 +/- 0.070 Inclination: 16.40078 +/- 0.023 Eccentricity: 0.75712826 +/- 0.0082 Semi-Major Axis: 143.02336883 +/- 4.3793 Time of Perihelion: 2460493.3805 +/- 202.9 Perihelion: 34.73633430 +/- 1.5839 Aphelion: 251.31040336 +/- 7.7840 Period (y) 1710.4828 +/- 78.56 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -30.52147237 +/- 0.0155 Ecliptic Y -17.00924572 +/- 0.0090 Ecliptic Z 6.67955521 +/- 0.0035 Ecliptic XDOT 0.00212943 +/- 0.0000 Ecliptic YDOT -0.00303734 +/- 0.0000 Ecliptic ZDOT -0.00089870 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 35.57374275 +/- 0.0140 Geocenter to KBO 34.75928897 +/- 0.0183 # Hcoef: 9.27
The following table shows the complete astrometric record for 16GW367. 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 (16GW367) followed by the observatory code and reference code for the source of the astrometry.
2016 03 16.45951 14 07 17.28 -01 05 41.7 24.5z 16GW367 T09 C~89Tb 2016 03 16.48822 14 07 17.18 -01 05 41.0 25.1z 16GW367 T09 C~89Tb 2016 03 16.51315 14 07 17.09 -01 05 40.5 25.1z 16GW367 T09 C~89Tb 2016 03 16.53802 14 07 16.99 -01 05 39.6 24.8z 16GW367 T09 C~89Tb 2016 03 16.57077 14 07 16.87 -01 05 39.0 24.6z 16GW367 T09 C~89Tb 2016 04 08.53253 14 05 35.46 -00 55 09.5 24.8r 16GW367 T09 C~89Tb 2016 04 08.54322 14 05 35.41 -00 55 09.4 24.0r 16GW367 T09 C~89Tb 2016 04 08.56882 14 05 35.27 -00 55 08.5 24.9r 16GW367 T09 C~89Tb 2016 04 11.43072 14 05 21.08 -00 53 54.3 24.5i 16GW367 T09 C~89Tb 2016 04 11.45409 14 05 20.97 -00 53 53.6 24.1i 16GW367 T09 C~89Tb 2016 04 11.47868 14 05 20.82 -00 53 52.9 24.2i 16GW367 T09 C~89Tb 2016 04 11.50036 14 05 20.72 -00 53 52.4 24.2i 16GW367 T09 C~89Tb 2016 04 11.52732 14 05 20.60 -00 53 51.9 24.7i 16GW367 T09 C~89Tb 2016 04 11.54904 14 05 20.49 -00 53 51.2 24.5i 16GW367 T09 C~89Tb 2016 06 08.265184 14 00 55.41 -00 40 43.2 16GW367 T09 C~8COT 2016 06 08.389608 14 00 55.00 -00 40 43.5 16GW367 T09 C~8COT
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 -0.22 0.00 0.09
2 0.0001 -1.65 -0.04 0.14 0.06
3 0.0001 -3.09 0.10 0.15 -0.08
4 0.0002 -4.81 -0.03 0.47 0.10
5 0.0003 -6.70 0.16 0.42 -0.15
6 0.0632 -1651.41 0.10 67.48 0.07
7 0.0632 -1652.15 0.22 67.32 -0.08
8 0.0633 -1654.43 -0.03 67.44 0.07
9 0.0711 -1879.81 -0.06 63.77 -0.08
10 0.0712 -1881.60 0.04 63.86 0.06
11 0.0712 -1883.95 -0.33 63.74 -0.00
12 0.0713 -1885.53 -0.17 63.69 -0.00
13 0.0714 -1887.39 0.14 63.54 -0.09
14 0.0714 -1889.18 0.10 63.63 0.05
15 0.2294 -5894.54 0.01 -567.24 0.00
16 0.2298 -5900.21 -0.00 -569.64 0.00
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.
16GW367 quality flag:1 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 135.869 146.316 127.197 ecceobj 0.745 0.764 0.726 incobj 16.421 16.371 16.485 qmin 32.641 32.901 32.972 qmax 292.462 298.144 247.208 amean 150.256 156.597 131.526 amin 135.869 144.507 126.868 amax 163.234 166.237 140.799 emean 0.771 0.780 0.737 emin 0.741 0.757 0.722 emax 0.792 0.794 0.756 imean 13.975 14.664 14.490 imin 12.775 14.211 13.020 imax 15.678 15.564 15.486 excite_mean 0.808 0.820 0.778 fracstop 1.000 1.000 1.000 cjmean 2.959 2.952 2.965 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 239.0 211.4 201.4 kozaiamp 82.2 45.1 64.2