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: 16EW397 # Created Tue Jan 21 02:10:52 2025 # Orbit generated from Bernstein formalism # Fitting 20 observations of 20 # Arc: 55.58d # First observation: 2016/02/12 # Last observation: 2016/04/08 Preliminary a, adot, b, bdot, g, gdot: -0.000002 0.030122 -0.000001 0.006818 0.027880 0.000000 # Chi-squared of fit: 5.94 DOF: 34 RMS: 0.10 # Min/Max residuals: -0.30 0.22 # Exact a, adot, b, bdot, g, gdot: 1.769418E-05 3.071801E-02 2.774978E-06 6.797360E-03 2.789660E-02 -1.684478E-03 # Covariance matrix: 3.8202E-13 6.3389E-11 2.9163E-14 8.4881E-13 1.2486E-11 5.0817E-10 6.3389E-11 1.7141E-07 8.4551E-11 1.4266E-09 2.9889E-08 5.2066E-07 2.9163E-14 8.4551E-11 2.7669E-13 -1.2909E-12 1.4717E-11 2.4903E-10 8.4881E-13 1.4266E-09 -1.2909E-12 3.7019E-11 2.5149E-10 5.1057E-09 1.2486E-11 2.9889E-08 1.4717E-11 2.5149E-10 5.2219E-09 9.3548E-08 5.0817E-10 5.2066E-07 2.4903E-10 5.1057E-09 9.3548E-08 2.3660E-06 # lat0 lon0 xBary yBary zBary JD0 -3.146930 176.175717 0.541524 -0.045016 -0.821760 2457431.059209 # Heliocentric elements and errors Epoch: 2457430.5000 = 2016/02/12 Mean Anomaly: 344.60629 +/- 11.024 Argument of Peri: 9.39512 +/- 17.278 Long of Asc Node: 189.02515 +/- 0.180 Inclination: 12.78851 +/- 0.162 Eccentricity: 0.20144492 +/- 0.0129 Semi-Major Axis: 45.29346017 +/- 0.8272 Time of Perihelion: 2462191.4378 +/- 3406.9 Perihelion: 36.16932282 +/- 0.8828 Aphelion: 54.41759752 +/- 1.1536 Period (y) 304.8326 +/- 8.35 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -36.50176492 +/- 0.0925 Ecliptic Y 2.98013124 +/- 0.0062 Ecliptic Z -1.96776471 +/- 0.0051 Ecliptic XDOT -0.00007330 +/- 0.0002 Ecliptic YDOT -0.00302358 +/- 0.0000 Ecliptic ZDOT 0.00067520 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 36.67604289 +/- 0.0921 Geocenter to KBO 35.84666669 +/- 0.0929 # Hcoef: 7.21
The following table shows the complete astrometric record for 16EW397. 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 (16EW397) followed by the observatory code and reference code for the source of the astrometry.
2016 02 12.55842 11 40 57.89 -01 22 05.3 22.6y 16EW397 T09 C~8SZf 2016 02 12.58759 11 40 57.77 -01 22 04.7 23.1y 16EW397 T09 C~8SZf 2016 02 12.61467 11 40 57.66 -01 22 04.1 22.9y 16EW397 T09 C~8SZf 2016 02 12.62813 11 40 57.59 -01 22 03.9 22.4y 16EW397 T09 C~8SZf 2016 03 04.47095 11 39 23.77 -01 11 16.6 22.6i 16EW397 T09 C~8SZf 2016 03 04.47636 11 39 23.74 -01 11 16.3 22.5i 16EW397 T09 C~8SZf 2016 03 04.47910 11 39 23.73 -01 11 16.1 22.6i 16EW397 T09 C~8SZf 2016 03 04.48179 11 39 23.72 -01 11 16.3 22.6i 16EW397 T09 C~8SZf 2016 03 04.49868 11 39 23.63 -01 11 15.6 22.5i 16EW397 T09 C~8SZf 2016 03 04.50136 11 39 23.62 -01 11 15.5 22.5i 16EW397 T09 C~8SZf 2016 03 04.52178 11 39 23.52 -01 11 14.9 22.5i 16EW397 T09 C~8SZf 2016 03 28.134845 11 37 27.727 -00 57 06.59 22.8V 16EW397 W84 C~8Wk6 2016 03 28.138013 11 37 27.710 -00 57 06.55 22.9V 16EW397 W84 C~8Wk6 2016 03 28.144416 11 37 27.674 -00 57 06.26 22.9V 16EW397 W84 C~8Wk6 2016 04 04.28576 11 36 54.33 -00 52 49.9 22.8g 16EW397 T09 C~8SZf 2016 04 04.29925 11 36 54.27 -00 52 49.4 23.2g 16EW397 T09 C~8SZf 2016 04 04.31200 11 36 54.22 -00 52 48.9 23.3g 16EW397 T09 C~8SZf 2016 04 04.31412 11 36 54.21 -00 52 48.9 23.4g 16EW397 T09 C~8SZf 2016 04 08.142143 11 36 37.106 -00 50 34.22 23.3g 16EW397 W84 C~8Wk6 2016 04 08.143315 11 36 37.116 -00 50 34.08 23.0g 16EW397 W84 C~8Wk6
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 -0.06 0.00 0.22
2 0.0001 -1.89 0.02 -0.16 0.05
3 0.0002 -3.64 0.08 -0.27 -0.06
4 0.0002 -4.68 -0.05 -0.50 -0.30
5 0.0573 -1553.02 0.02 34.92 -0.02
6 0.0573 -1553.55 -0.07 35.01 0.06
7 0.0573 -1553.77 -0.06 35.14 0.18
8 0.0573 -1553.83 0.10 34.89 -0.07
9 0.0573 -1555.34 -0.04 35.00 0.00
10 0.0573 -1555.52 0.01 35.03 0.03
11 0.0574 -1557.14 0.06 34.99 -0.06
12 0.1220 -3488.12 0.07 123.70 0.06
13 0.1221 -3488.36 0.08 123.64 -0.01
14 0.1221 -3488.98 -0.01 123.69 0.01
15 0.1416 -4049.95 -0.17 160.27 -0.09
16 0.1417 -4050.97 -0.15 160.37 -0.06
17 0.1417 -4051.86 -0.04 160.53 0.04
18 0.1417 -4052.00 -0.02 160.47 -0.03
19 0.1522 -4341.04 0.04 182.14 -0.08
20 0.1522 -4340.96 0.21 182.33 0.11
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.
16EW397 quality flag:1 Type: SCATEXTD SCATNEAR 5:3EE axisobj 44.797 49.825 42.044 ecceobj 0.192 0.277 0.174 incobj 12.843 12.336 13.329 qmin 35.246 34.944 33.065 qmax 55.019 65.881 52.280 amean 44.958 50.062 42.327 amin 44.556 49.482 41.863 amax 45.415 50.723 42.839 emean 0.195 0.282 0.187 emin 0.178 0.265 0.149 emax 0.214 0.301 0.221 imean 12.720 12.039 13.269 imin 11.870 11.113 12.332 imax 13.633 13.028 14.766 excite_mean 0.294 0.351 0.296 fracstop 1.000 1.000 1.000 cjmean 3.008 3.021 2.978 libcent 0 -180.0 -180.0 180.3 libamp 0 -180.0 -180.0 86.0 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 173.6 173.1 184.0 kozaiamp 180.0 179.9 180.0