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: 15DY249 # Created Wed Nov 27 02:10:14 2024 # Orbit generated from Bernstein formalism # Fitting 12 observations of 12 # Arc: 2.12d # First observation: 2015/02/17 # Last observation: 2015/02/19 # WARNING Fitting with energy constraint # WARNING and with gdot fixed = 0 # Chi-squared of fit: 18.78 DOF: 20 RMS: 0.22 # Min/Max residuals: -0.48 0.37 # Exact a, adot, b, bdot, g, gdot: 1.443491E-05 2.661010E-02 5.755095E-06 1.132946E-02 2.765154E-02 0.000000E+00 # Covariance matrix: 4.4919E-11 7.8046E-08 1.7344E-12 2.5354E-09 1.2440E-08 0.0000E+00 7.8046E-08 1.3678E-04 3.0363E-09 4.4383E-06 2.1777E-05 0.0000E+00 1.7344E-12 3.0363E-09 3.6198E-13 2.7064E-11 4.8352E-10 0.0000E+00 2.5354E-09 4.4383E-06 2.7064E-11 1.7373E-07 7.0678E-07 0.0000E+00 1.2440E-08 2.1777E-05 4.8352E-10 7.0678E-07 3.4679E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 2.7821E-04 # lat0 lon0 xBary yBary zBary JD0 -12.108683 157.258677 0.159134 -0.203777 -0.950702 2457070.743398 # Heliocentric elements and errors Epoch: 2457070.5000 = 2015/02/17 Mean Anomaly: 357.73429 +/- 243.180 Argument of Peri: 334.27123 +/- 310.219 Long of Asc Node: 182.75553 +/- 9.055 Inclination: 25.67005 +/- 7.384 Eccentricity: 0.03307874 +/- 0.5714 Semi-Major Axis: 38.38763206 +/- 20.1634 Time of Perihelion: 2457617.2485 +/- 232428.7 Perihelion: 37.11781753 +/- 29.3457 Aphelion: 39.65744659 +/- 30.2484 Period (y) 237.8456 +/- 187.40 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -33.44932177 +/- 2.1961 Ecliptic Y 14.19182444 +/- 0.9208 Ecliptic Z -7.58591595 +/- 0.5109 Ecliptic XDOT -0.00123918 +/- 0.0015 Ecliptic YDOT -0.00234451 +/- 0.0011 Ecliptic ZDOT 0.00109689 +/- 0.0003 # Distances at JD0 (AU) Heliocenter to KBO 37.11887834 +/- 2.0128 Geocenter to KBO 36.16435395 +/- 2.4355 # Hcoef: 8.37
The following table shows the complete astrometric record for 15DY249. 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 (15DY249) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.24262 10 17 58.59 -02 24 48.2 15DY249 W84 C~2iOX 2015 02 17.31139 10 17 58.22 -02 24 45.6 24.5g 15DY249 W84 C~2iOX 2015 02 17.35838 10 17 57.97 -02 24 44.9 24.9g 15DY249 W84 C~2iOX 2015 02 18.08578 10 17 54.28 -02 24 20.6 24.5g 15DY249 W84 C~2iOX 2015 02 18.15325 10 17 53.97 -02 24 17.9 24.0g 15DY249 W84 C~2iOX 2015 02 18.22142 10 17 53.62 -02 24 15.6 24.1g 15DY249 W84 C~2iOX 2015 02 18.29158 10 17 53.26 -02 24 13.6 25.2g 15DY249 W84 C~2iOX 2015 02 18.36055 10 17 52.90 -02 24 10.9 24.0g 15DY249 W84 C~2iOX 2015 02 19.08254 10 17 49.26 -02 23 47.0 24.2g 15DY249 W84 C~2iOX 2015 02 19.21964 10 17 48.55 -02 23 42.0 24.7g 15DY249 W84 C~2iOX 2015 02 19.28855 10 17 48.17 -02 23 40.0 24.3g 15DY249 W84 C~2iOX 2015 02 19.35764 10 17 47.82 -02 23 37.3 24.5g 15DY249 W84 C~2iOX
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 0.16 0.00 0.15
2 0.0002 -6.11 -0.18 0.38 0.37
3 0.0003 -9.85 0.01 -0.34 -0.48
4 0.0023 -70.22 -0.32 1.95 -0.46
5 0.0025 -75.53 0.03 2.76 0.16
6 0.0027 -81.25 0.05 2.97 0.19
7 0.0029 -87.00 0.21 2.85 -0.12
8 0.0031 -93.01 -0.00 3.38 0.21
9 0.0050 -152.53 0.24 5.58 -0.12
10 0.0054 -164.26 0.08 6.32 0.21
11 0.0056 -170.30 -0.13 6.09 -0.24
12 0.0058 -176.17 -0.18 6.68 0.13
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.
15DY249 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