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: 16EC369 # Created Wed Nov 27 02:10:35 2024 # Orbit generated from Bernstein formalism # Fitting 17 observations of 17 # Arc: 26.01d # First observation: 2016/03/09 # Last observation: 2016/04/04 Preliminary a, adot, b, bdot, g, gdot: 0.000000 0.032360 -0.000003 -0.001684 0.026976 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 12.57 DOF: 29 RMS: 0.15 # Min/Max residuals: -0.35 0.34 # Exact a, adot, b, bdot, g, gdot: 1.765489E-05 3.022120E-02 -4.056460E-07 -1.217900E-03 2.637549E-02 3.087721E-03 # Covariance matrix: 3.0367E-13 -2.6594E-11 -4.0111E-14 7.4618E-12 -5.1742E-13 2.9287E-09 -2.6594E-11 1.6108E-07 -1.5328E-10 -3.7703E-08 3.7999E-08 3.0363E-06 -4.0111E-14 -1.5328E-10 3.3355E-13 3.2311E-11 -3.8466E-11 -4.4005E-09 7.4618E-12 -3.7703E-08 3.2311E-11 8.9586E-09 -8.8317E-09 -6.6604E-07 -5.1742E-13 3.7999E-08 -3.8466E-11 -8.8317E-09 9.1555E-09 8.3953E-07 2.9287E-09 3.0363E-06 -4.4005E-09 -6.6604E-07 8.3953E-07 1.3845E-04 # lat0 lon0 xBary yBary zBary JD0 16.919868 -137.635643 0.793223 0.172408 -0.566281 2457457.114669 # Heliocentric elements and errors Epoch: 2457450.5000 = 2016/03/03 Mean Anomaly: 10.16566 +/- 41.015 Argument of Peri: 76.31995 +/- 84.932 Long of Asc Node: 124.37657 +/- 0.427 Inclination: 16.76791 +/- 0.014 Eccentricity: 0.31030763 +/- 0.2035 Semi-Major Axis: 55.00252602 +/- 8.9659 Time of Perihelion: 2453243.1813 +/- 16943.8 Perihelion: 37.93482243 +/- 12.7852 Aphelion: 72.07022960 +/- 16.2247 Period (y) 407.9267 +/- 99.74 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -27.77624800 +/- 0.0972 Ecliptic Y -24.25732304 +/- 0.0887 Ecliptic Z 11.03426568 +/- 0.0400 Ecliptic XDOT 0.00186001 +/- 0.0009 Ecliptic YDOT -0.00255628 +/- 0.0008 Ecliptic ZDOT -0.00002766 +/- 0.0003 # Distances at JD0 (AU) Heliocenter to KBO 38.49276157 +/- 0.0904 Geocenter to KBO 37.91398155 +/- 0.1375 # Hcoef: 8.27
The following table shows the complete astrometric record for 16EC369. 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 (16EC369) followed by the observatory code and reference code for the source of the astrometry.
2016 03 09.61388 15 00 03.43 +00 36 22.7 24.0r 16EC369 T09 C~8Djl 2016 03 09.64419 15 00 03.37 +00 36 23.9 24.1r 16EC369 T09 C~8Djl 2016 03 09.65786 15 00 03.33 +00 36 24.0 24.6r 16EC369 T09 C~8Djl 2016 03 12.54873 14 59 57.12 +00 37 56.6 24.2z 16EC369 T09 C~8Djl 2016 03 12.57576 14 59 57.05 +00 37 57.4 24.1z 16EC369 T09 C~8Djl 2016 03 12.61360 14 59 56.95 +00 37 58.8 23.9z 16EC369 T09 C~8Djl 2016 03 12.62983 14 59 56.90 +00 37 59.6 24.1z 16EC369 T09 C~8Djl 2016 03 12.63522 14 59 56.89 +00 37 59.5 24.2z 16EC369 T09 C~8Djl 2016 03 15.56722 14 59 49.84 +00 39 33.7 23.6y 16EC369 T09 C~8Djl 2016 03 15.57534 14 59 49.80 +00 39 34.4 23.3y 16EC369 T09 C~8Djl 2016 03 15.58613 14 59 49.78 +00 39 34.9 23.9y 16EC369 T09 C~8Djl 2016 03 15.64012 14 59 49.63 +00 39 36.6 24.2y 16EC369 T09 C~8Djl 2016 04 04.58242 14 58 43.84 +00 50 18.7 24.6g 16EC369 T09 C~8Djl 2016 04 04.58878 14 58 43.82 +00 50 18.9 24.7g 16EC369 T09 C~8Djl 2016 04 04.59516 14 58 43.78 +00 50 19.1 24.5g 16EC369 T09 C~8Djl 2016 04 04.60802 14 58 43.73 +00 50 19.7 24.4g 16EC369 T09 C~8Djl 2016 04 04.62071 14 58 43.68 +00 50 19.7 24.5g 16EC369 T09 C~8Djl
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 0.10 0.00 -0.07
2 0.0001 -1.21 0.08 0.88 0.18
3 0.0001 -1.82 0.02 0.80 -0.19
4 0.0080 -118.06 0.15 61.93 -0.03
5 0.0081 -119.30 0.09 62.39 -0.12
6 0.0082 -121.15 -0.11 63.29 0.01
7 0.0083 -122.10 -0.35 63.83 0.22
8 0.0083 -122.21 -0.23 63.69 -0.02
9 0.0163 -250.97 0.34 122.65 -0.31
10 0.0163 -251.75 -0.05 123.14 0.03
11 0.0164 -252.19 0.03 123.53 0.21
12 0.0165 -254.84 -0.07 124.50 0.13
13 0.0711 -1386.75 0.04 448.26 0.01
14 0.0711 -1387.10 0.12 448.36 0.03
15 0.0711 -1387.73 -0.08 448.37 -0.03
16 0.0712 -1388.62 -0.11 448.73 0.17
17 0.0712 -1389.34 0.03 448.51 -0.20
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.