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: 15DH249 # Created Wed Nov 27 02:10:13 2024 # Orbit generated from Bernstein formalism # Fitting 10 observations of 10 # Arc: 2.13d # 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: 9.68 DOF: 16 RMS: 0.17 # Min/Max residuals: -0.30 0.42 # Exact a, adot, b, bdot, g, gdot: 1.398121E-05 2.013712E-02 4.913881E-06 4.852981E-03 2.216620E-02 0.000000E+00 # Covariance matrix: 2.8762E-11 3.9651E-08 1.2859E-12 1.5048E-09 6.3123E-09 0.0000E+00 3.9651E-08 5.5495E-05 1.7953E-09 2.1008E-06 8.8127E-06 0.0000E+00 1.2859E-12 1.7953E-09 3.6580E-13 -6.0778E-12 2.8527E-10 0.0000E+00 1.5048E-09 2.1008E-06 -6.0778E-12 1.1371E-07 3.3383E-07 0.0000E+00 6.3123E-09 8.8127E-06 2.8527E-10 3.3383E-07 1.4003E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 1.4332E-04 # lat0 lon0 xBary yBary zBary JD0 -16.199718 156.099546 0.141091 -0.271846 -0.936396 2457070.648138 # Heliocentric elements and errors Epoch: 2457070.5000 = 2015/02/17 Mean Anomaly: 357.26763 +/- 267.518 Argument of Peri: 312.22334 +/- 334.820 Long of Asc Node: 204.67658 +/- 8.907 Inclination: 20.69808 +/- 2.607 Eccentricity: 0.02391536 +/- 0.5583 Semi-Major Axis: 47.18100954 +/- 24.5164 Time of Perihelion: 2457968.9357 +/- 443078.5 Perihelion: 46.05265851 +/- 35.5873 Aphelion: 48.30936056 +/- 36.3862 Period (y) 324.0851 +/- 252.60 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -40.44524676 +/- 2.1144 Ecliptic Y 18.07614709 +/- 0.9372 Ecliptic Z -12.58595450 +/- 0.6719 Ecliptic XDOT -0.00116424 +/- 0.0013 Ecliptic YDOT -0.00221177 +/- 0.0009 Ecliptic ZDOT 0.00057571 +/- 0.0004 # Distances at JD0 (AU) Heliocenter to KBO 46.05400449 +/- 1.9019 Geocenter to KBO 45.11374035 +/- 2.4084 # Hcoef: 7.64
The following table shows the complete astrometric record for 15DH249. 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 (15DH249) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.14736 10 07 46.36 -05 48 30.8 25.3g 15DH249 W84 C~2iOW 2015 02 17.23303 10 07 45.98 -05 48 28.4 24.2g 15DH249 W84 C~2iOW 2015 02 17.34887 10 07 45.51 -05 48 25.4 24.5g 15DH249 W84 C~2iOW 2015 02 18.07632 10 07 42.48 -05 48 08.1 25.0g 15DH249 W84 C~2iOW 2015 02 18.14392 10 07 42.16 -05 48 06.4 24.4g 15DH249 W84 C~2iOW 2015 02 18.21185 10 07 41.87 -05 48 04.8 24.6g 15DH249 W84 C~2iOW 2015 02 18.28208 10 07 41.56 -05 48 02.8 24.4g 15DH249 W84 C~2iOW 2015 02 19.07317 10 07 38.24 -05 47 43.4 24.6g 15DH249 W84 C~2iOW 2015 02 19.21032 10 07 37.66 -05 47 40.4 25.2g 15DH249 W84 C~2iOW 2015 02 19.27907 10 07 37.37 -05 47 38.4 24.4g 15DH249 W84 C~2iOW
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 0.08 0.00 -0.30
2 0.0002 -6.16 -0.23 0.16 -0.05
3 0.0006 -13.78 0.04 0.39 0.29
4 0.0025 -62.19 0.42 -0.04 0.10
5 0.0027 -67.26 -0.03 -0.20 -0.02
6 0.0029 -71.87 0.00 -0.29 -0.06
7 0.0031 -76.91 -0.23 -0.12 0.15
8 0.0053 -130.12 -0.17 -0.18 0.09
9 0.0056 -139.27 0.08 -0.55 -0.25
10 0.0058 -144.03 0.03 -0.27 0.05
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.
15DH249 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