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: 15DF249 # Created Tue May 7 01:16:17 2024 # Orbit generated from Bernstein formalism # Fitting 16 observations of 16 # Arc: 7.03d # First observation: 2015/02/17 # Last observation: 2015/02/24 Preliminary a, adot, b, bdot, g, gdot: -0.000000 0.027053 0.000000 -0.002441 0.025275 0.000000 # WARNING Fitting with energy constraint # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # Chi-squared of fit: 19.81 DOF: 27 RMS: 0.20 # Min/Max residuals: -0.55 0.40 # Exact a, adot, b, bdot, g, gdot: 1.408046E-05 2.231148E-02 -1.620041E-06 -2.450690E-03 2.453128E-02 1.101465E-02 # Covariance matrix: 6.3045E-11 9.8126E-08 2.6432E-12 1.9473E-10 1.5413E-08 -1.0984E-07 9.8126E-08 1.5317E-04 4.1252E-09 3.0397E-07 2.4055E-05 -1.7263E-04 2.6432E-12 4.1252E-09 2.7222E-13 -4.3795E-12 6.4785E-10 -4.6331E-09 1.9473E-10 3.0397E-07 -4.3795E-12 2.8820E-09 4.7735E-08 -3.4909E-07 1.5413E-08 2.4055E-05 6.4785E-10 4.7735E-08 3.7777E-06 -2.7055E-05 -1.0984E-07 -1.7263E-04 -4.6331E-09 -3.4909E-07 -2.7055E-05 3.4009E-04 # lat0 lon0 xBary yBary zBary JD0 -11.554757 151.270532 0.058602 -0.196806 -0.963574 2457070.642778 # Heliocentric elements and errors Epoch: 2457070.5000 = 2015/02/17 Mean Anomaly: 51.74129 +/- 50.172 Argument of Peri: 136.79272 +/- 96.645 Long of Asc Node: 270.97755 +/- 14.438 Inclination: 12.94715 +/- 1.828 Eccentricity: 0.44773197 +/- 0.7505 Semi-Major Axis: 46.52011520 +/- 24.7639 Time of Perihelion: 2440413.5920 +/- 9164.1 Perihelion: 25.69157243 +/- 37.4971 Aphelion: 67.34865798 +/- 50.0432 Period (y) 317.2995 +/- 253.36 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -35.85923822 +/- 2.7747 Ecliptic Y 19.72145633 +/- 1.5213 Ecliptic Z -8.16537671 +/- 0.6470 Ecliptic XDOT -0.00220868 +/- 0.0014 Ecliptic YDOT -0.00163655 +/- 0.0019 Ecliptic ZDOT -0.00051411 +/- 0.0004 # Distances at JD0 (AU) Heliocenter to KBO 41.73121353 +/- 2.4935 Geocenter to KBO 40.76428342 +/- 3.2298 # Hcoef: 7.60
The following table shows the complete astrometric record for 15DF249. 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 (15DF249) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.14200 09 56 52.65 +00 12 12.4 24.7g 15DF249 W84 C~2iOV 2015 02 17.22761 09 56 52.23 +00 12 14.4 25.0g 15DF249 W84 C~2iOV 2015 02 17.29625 09 56 51.92 +00 12 16.1 23.8g 15DF249 W84 C~2iOV 2015 02 17.34333 09 56 51.68 +00 12 17.1 15DF249 W84 C~2iOV 2015 02 18.07096 09 56 48.19 +00 12 34.8 24.1g 15DF249 W84 C~2iOV 2015 02 18.13857 09 56 47.90 +00 12 36.4 23.7g 15DF249 W84 C~2iOV 2015 02 18.20641 09 56 47.57 +00 12 38.1 15DF249 W84 C~2iOV 2015 02 18.27657 09 56 47.24 +00 12 39.7 23.7g 15DF249 W84 C~2iOV 2015 02 18.34565 09 56 46.90 +00 12 41.4 24.2g 15DF249 W84 C~2iOV 2015 02 19.06770 09 56 43.49 +00 12 58.7 15DF249 W84 C~2iOV 2015 02 19.20479 09 56 42.82 +00 13 02.1 15DF249 W84 C~2iOV 2015 02 19.34266 09 56 42.13 +00 13 05.1 15DF249 W84 C~2iOV 2015 02 22.12765 09 56 28.94 +00 14 15.3 15DF249 W84 C~2iOV 2015 02 22.19579 09 56 28.63 +00 14 16.3 15DF249 W84 C~2iOV 2015 02 24.11242 09 56 19.58 +00 15 05.6 15DF249 W84 C~2iOV 2015 02 24.17377 09 56 19.29 +00 15 06.9 15DF249 W84 C~2iOV
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 0.01 2 0.0002 -6.60 -0.00 -0.32 -0.06 3 0.0004 -11.55 0.28 -0.35 0.12 4 0.0006 -15.28 0.14 -0.67 -0.06 5 0.0025 -70.51 -0.55 -2.34 -0.05 6 0.0027 -75.15 -0.03 -2.36 0.11 7 0.0029 -80.38 -0.07 -2.49 0.16 8 0.0031 -85.58 0.09 -2.72 0.12 9 0.0033 -90.95 -0.02 -2.91 0.12 10 0.0053 -144.92 0.18 -4.53 -0.06 11 0.0056 -155.52 0.04 -4.85 -0.06 12 0.0060 -166.27 -0.18 -5.65 -0.54 13 0.0136 -376.18 -0.29 -8.87 0.40 14 0.0138 -380.89 0.21 -9.56 -0.19 15 0.0191 -525.31 -0.02 -10.70 0.12 16 0.0193 -529.84 0.13 -11.00 -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.
15DF249 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