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: 15DW249 # Created Wed Nov 27 02:10:14 2024 # Orbit generated from Bernstein formalism # Fitting 30 observations of 30 # Arc: 33.87d # First observation: 2015/02/17 # Last observation: 2015/03/23 Preliminary a, adot, b, bdot, g, gdot: -0.000001 0.037711 0.000003 0.004097 0.029273 0.000000 # Chi-squared of fit: 16.67 DOF: 54 RMS: 0.13 # Min/Max residuals: -0.21 0.34 # Exact a, adot, b, bdot, g, gdot: 1.814764E-05 3.226202E-02 3.381219E-06 4.280680E-03 2.843458E-02 -3.052776E-03 # Covariance matrix: 2.0560E-13 1.4582E-10 4.0320E-14 -4.7429E-12 2.3657E-11 -6.3674E-11 1.4582E-10 3.3378E-07 9.2635E-11 -1.1319E-08 5.1008E-08 -1.4392E-06 4.0320E-14 9.2635E-11 1.3259E-13 -4.5023E-12 1.4139E-11 -4.0842E-10 -4.7429E-12 -1.1319E-08 -4.5023E-12 4.1754E-10 -1.7214E-09 5.3007E-08 2.3657E-11 5.1008E-08 1.4139E-11 -1.7214E-09 7.8357E-09 -2.0032E-07 -6.3674E-11 -1.4392E-06 -4.0842E-10 5.3007E-08 -2.0032E-07 1.5843E-05 # lat0 lon0 xBary yBary zBary JD0 -12.990086 155.244396 0.124980 -0.219495 -0.952304 2457070.736578 # Heliocentric elements and errors Epoch: 2457070.5000 = 2015/02/17 Mean Anomaly: 341.82022 +/- 16.539 Argument of Peri: 329.92323 +/- 29.096 Long of Asc Node: 213.87994 +/- 0.487 Inclination: 14.68620 +/- 0.074 Eccentricity: 0.23367691 +/- 0.0920 Semi-Major Axis: 45.97509228 +/- 2.9753 Time of Perihelion: 2462820.5071 +/- 5201.1 Perihelion: 35.23177490 +/- 4.8060 Aphelion: 56.71840966 +/- 5.6011 Period (y) 311.7397 +/- 30.26 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -31.95769127 +/- 0.0969 Ecliptic Y 14.87261984 +/- 0.0447 Ecliptic Z -7.90517425 +/- 0.0246 Ecliptic XDOT -0.00112848 +/- 0.0003 Ecliptic YDOT -0.00290762 +/- 0.0002 Ecliptic ZDOT 0.00046779 +/- 0.0001 # Distances at JD0 (AU) Heliocenter to KBO 36.12451567 +/- 0.0878 Geocenter to KBO 35.16844133 +/- 0.1095 # Hcoef: 7.65
The following table shows the complete astrometric record for 15DW249. 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 (15DW249) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.23580 10 09 21.60 -02 31 03.7 23.7g 15DW249 W84 C~2iOW 2015 02 17.30445 10 09 21.25 -02 31 01.7 23.7g 15DW249 W84 C~2iOW 2015 02 17.35153 10 09 21.00 -02 31 00.0 23.4g 15DW249 W84 C~2iOW 2015 02 18.07910 10 09 17.27 -02 30 38.7 23.9g 15DW249 W84 C~2iOW 2015 02 18.14708 10 09 16.89 -02 30 36.6 23.9g 15DW249 W84 C~5hWs 2015 02 18.21462 10 09 16.53 -02 30 34.7 23.5g 15DW249 W84 C~2iOW 2015 02 18.21512 10 09 16.53 -02 30 34.5 15DW249 W84 C~5hWs 2015 02 18.28477 10 09 16.18 -02 30 32.7 23.7g 15DW249 W84 C~2iOW 2015 02 18.28527 10 09 16.16 -02 30 32.3 15DW249 W84 C~5hWs 2015 02 18.35376 10 09 15.80 -02 30 30.4 23.9g 15DW249 W84 C~2iOW 2015 02 18.35426 10 09 15.80 -02 30 30.1 15DW249 W84 C~5hWs 2015 02 19.35086 10 09 10.65 -02 30 00.8 15DW249 W84 C~2iOW 2015 02 22.06830 10 08 56.58 -02 28 36.9 15DW249 W84 C~2iOW 2015 02 22.13567 10 08 56.25 -02 28 34.9 15DW249 W84 C~2iOW 2015 02 22.20383 10 08 55.87 -02 28 32.6 15DW249 W84 C~2iOW 2015 03 14.044734 10 07 16.95 -02 17 07.3 22.8i 15DW249 W84 C~4UG9 2015 03 14.126296 10 07 16.56 -02 17 04.3 22.9r 15DW249 W84 C~4UG9 2015 03 14.180116 10 07 16.30 -02 17 02.4 23.2g 15DW249 W84 C~4UG9 2015 03 19.068310 10 06 54.07 -02 14 00.9 15DW249 W84 C~4UG9 2015 03 19.072095 10 06 54.05 -02 14 01.0 15DW249 W84 C~4UG9 2015 03 19.075914 10 06 54.02 -02 14 00.8 15DW249 W84 C~4UG9 2015 03 19.079699 10 06 54.01 -02 14 00.6 15DW249 W84 C~4UG9 2015 03 19.091667 10 06 53.96 -02 14 00.1 15DW249 W84 C~4UG9 2015 03 19.097766 10 06 53.94 -02 13 59.9 15DW249 W84 C~4UG9 2015 03 19.103889 10 06 53.90 -02 13 59.6 15DW249 W84 C~4UG9 2015 03 19.109988 10 06 53.87 -02 13 59.4 15DW249 W84 C~4UG9 2015 03 23.065405 10 06 36.81 -02 11 31.0 15DW249 W84 C~4UG9 2015 03 23.080602 10 06 36.77 -02 11 30.6 15DW249 W84 C~4UG9 2015 03 23.085556 10 06 36.73 -02 11 30.3 15DW249 W84 C~4UG9 2015 03 23.110046 10 06 36.62 -02 11 29.6 15DW249 W84 C~4UG9
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 -0.04 0.00 -0.21
2 0.0002 -5.61 0.12 -0.03 -0.16
3 0.0003 -9.72 -0.04 0.20 0.12
4 0.0023 -69.54 0.25 -0.15 0.05
5 0.0025 -75.61 -0.10 -0.25 0.01
6 0.0027 -81.32 -0.12 -0.43 -0.11
7 0.0027 -81.39 -0.15 -0.25 0.07
8 0.0029 -86.94 0.19 -0.47 -0.09
9 0.0029 -87.36 -0.19 -0.20 0.18
10 0.0031 -93.08 -0.15 -0.38 0.04
11 0.0031 -93.18 -0.21 -0.10 0.32
12 0.0058 -175.73 0.21 -0.69 -0.17
13 0.0132 -402.66 -0.03 1.28 -0.07
14 0.0134 -407.99 0.34 1.36 -0.04
15 0.0136 -414.13 -0.01 1.44 -0.01
16 0.0679 -2044.22 -0.00 103.97 0.16
17 0.0681 -2050.76 -0.03 104.65 0.15
18 0.0683 -2055.08 -0.06 105.01 0.05
19 0.0817 -2431.42 0.03 153.61 0.08
20 0.0817 -2431.66 0.08 153.41 -0.16
21 0.0817 -2432.15 -0.12 153.43 -0.18
22 0.0817 -2432.37 -0.04 153.56 -0.08
23 0.0817 -2433.25 -0.01 153.76 -0.01
24 0.0818 -2433.60 0.11 153.83 0.00
25 0.0818 -2434.27 -0.09 153.90 0.00
26 0.0818 -2434.76 -0.11 153.92 -0.04
27 0.0926 -2726.89 -0.12 199.69 0.09
28 0.0927 -2727.59 0.29 199.85 0.07
29 0.0927 -2728.26 -0.01 199.91 0.08
30 0.0927 -2730.05 0.00 199.97 -0.16
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.
15DW249 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