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: 16EW392 # Created Sun Feb 23 02:10:41 2025 # Orbit generated from Bernstein formalism # Fitting 18 observations of 18 # Arc: 32.93d # First observation: 2016/02/03 # Last observation: 2016/03/07 Preliminary a, adot, b, bdot, g, gdot: -0.000001 0.030894 0.000002 -0.010095 0.027073 0.000000 # Chi-squared of fit: 4.72 DOF: 30 RMS: 0.09 # Min/Max residuals: -0.17 0.23 # Exact a, adot, b, bdot, g, gdot: 1.540855E-05 2.543652E-02 -5.635053E-06 -9.935596E-03 2.624304E-02 1.032666E-03 # Covariance matrix: 6.2464E-13 5.6702E-10 1.6811E-13 -1.8533E-11 9.1020E-11 -5.6195E-10 5.6702E-10 1.1196E-06 3.1293E-10 -3.3519E-08 1.7213E-07 -4.5004E-06 1.6811E-13 3.1293E-10 3.0113E-13 -1.2144E-11 4.8364E-11 -1.1320E-09 -1.8533E-11 -3.3519E-08 -1.2144E-11 1.0757E-09 -5.1951E-09 1.1378E-07 9.1020E-11 1.7213E-07 4.8364E-11 -5.1951E-09 2.6561E-08 -6.4323E-07 -5.6195E-10 -4.5004E-06 -1.1320E-09 1.1378E-07 -6.4323E-07 4.2625E-05 # lat0 lon0 xBary yBary zBary JD0 -11.377076 140.206385 0.112775 -0.192697 -0.958568 2457421.989979 # Heliocentric elements and errors Epoch: 2457420.5000 = 2016/02/02 Mean Anomaly: 20.59051 +/- 142.752 Argument of Peri: 183.98848 +/- 171.824 Long of Asc Node: 293.83251 +/- 0.906 Inclination: 23.93830 +/- 0.685 Eccentricity: 0.08347438 +/- 0.0825 Semi-Major Axis: 42.33292813 +/- 1.9627 Time of Perihelion: 2451666.3584 +/- 39890.9 Perihelion: 38.79921334 +/- 3.9276 Aphelion: 45.86664292 +/- 4.0881 Period (y) 275.4391 +/- 19.15 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -29.38628969 +/- 0.1782 Ecliptic Y 24.61943081 +/- 0.1485 Ecliptic Z -7.51708514 +/- 0.0467 Ecliptic XDOT -0.00162297 +/- 0.0005 Ecliptic YDOT -0.00210923 +/- 0.0005 Ecliptic ZDOT -0.00103742 +/- 0.0001 # Distances at JD0 (AU) Heliocenter to KBO 39.06631496 +/- 0.1638 Geocenter to KBO 38.10534458 +/- 0.2366 # Hcoef: 9.05
The following table shows the complete astrometric record for 16EW392. 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 (16EW392) followed by the observatory code and reference code for the source of the astrometry.
2016 02 03.48919 09 16 06.83 +03 56 00.3 24.0y 16EW392 T09 C~8HEl 2016 02 03.53584 09 16 06.58 +03 56 01.4 23.4y 16EW392 T09 C~8HEl 2016 02 03.55770 09 16 06.48 +03 56 01.4 24.4y 16EW392 T09 C~8HEl 2016 02 03.57666 09 16 06.37 +03 56 01.7 23.5y 16EW392 T09 C~8HEl 2016 02 08.42303 09 15 41.09 +03 57 27.8 25.0r 16EW392 T09 C~8eUq 2016 02 08.43749 09 15 41.01 +03 57 28.2 25.0r 16EW392 T09 C~8eUq 2016 02 08.47270 09 15 40.82 +03 57 28.8 25.1r 16EW392 T09 C~8eUq 2016 02 08.50190 09 15 40.67 +03 57 29.3 24.9r 16EW392 T09 C~8eUq 2016 03 04.34374 09 13 37.42 +04 06 23.6 24.8i 16EW392 T09 C~8HEl 2016 03 04.35871 09 13 37.35 +04 06 23.9 24.9i 16EW392 T09 C~8HEl 2016 03 04.36703 09 13 37.31 +04 06 24.1 24.9i 16EW392 T09 C~8HEl 2016 03 04.38622 09 13 37.21 +04 06 24.6 24.8i 16EW392 T09 C~8HEl 2016 03 04.38892 09 13 37.21 +04 06 24.6 24.9i 16EW392 T09 C~8HEl 2016 03 04.39973 09 13 37.17 +04 06 24.9 24.9i 16EW392 T09 C~8HEl 2016 03 04.41331 09 13 37.10 +04 06 25.3 25.0i 16EW392 T09 C~8HEl 2016 03 07.35383 09 13 24.04 +04 07 34.3 25.5g 16EW392 T09 C~8HEl 2016 03 07.40643 09 13 23.81 +04 07 35.5 26.2g 16EW392 T09 C~8HEl 2016 03 07.42361 09 13 23.73 +04 07 36.2 26.1g 16EW392 T09 C~8HEl
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 -0.02 0.00 -0.07
2 0.0001 -3.90 -0.16 -0.10 0.21
3 0.0002 -5.32 0.18 -0.56 -0.07
4 0.0002 -6.98 0.04 -0.78 -0.13
5 0.0135 -393.47 0.04 -34.69 -0.02
6 0.0135 -394.74 -0.05 -34.67 0.09
7 0.0136 -397.63 -0.07 -34.97 0.02
8 0.0137 -399.92 0.01 -35.18 0.00
9 0.0817 -2319.22 0.03 -90.70 -0.01
10 0.0818 -2320.31 0.04 -90.73 -0.07
11 0.0818 -2320.94 0.01 -90.72 -0.07
12 0.0819 -2322.52 -0.17 -90.70 -0.07
13 0.0819 -2322.52 0.03 -90.70 -0.07
14 0.0819 -2323.18 0.15 -90.60 0.02
15 0.0819 -2324.30 0.02 -90.54 0.06
16 0.0900 -2531.46 -0.03 -84.55 -0.02
17 0.0901 -2535.11 0.04 -84.46 -0.03
18 0.0902 -2536.46 -0.10 -84.16 0.23
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.
16EW392 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0