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: 15DB250 # Created Sun Dec 22 02:10:18 2024 # Orbit generated from Bernstein formalism # Fitting 16 observations of 17 # Arc: 1.99y # First observation: 2013/03/16 # Last observation: 2015/03/14 Preliminary a, adot, b, bdot, g, gdot: 0.000000 0.030521 -0.000000 -0.004518 0.027547 0.000000 # Chi-squared of fit: 8.03 DOF: 26 RMS: 0.13 # Min/Max residuals: -0.25 0.29 # Exact a, adot, b, bdot, g, gdot: 1.760918E-05 3.048723E-02 -2.563869E-06 -4.508925E-03 2.743714E-02 1.955505E-05 # Covariance matrix: 5.0108E-13 9.2076E-12 1.2778E-15 -1.3653E-12 6.6941E-12 1.5483E-10 9.2076E-12 7.6560E-09 1.0352E-12 -1.1057E-09 5.4485E-09 1.2539E-07 1.2778E-15 1.0352E-12 4.8925E-13 -4.0060E-13 7.3688E-13 1.6955E-11 -1.3653E-12 -1.1057E-09 -4.0060E-13 1.5984E-10 -7.8698E-10 -1.8110E-08 6.6941E-12 5.4485E-09 7.3688E-13 -7.8698E-10 3.8826E-09 8.9253E-08 1.5483E-10 1.2539E-07 1.6955E-11 -1.8110E-08 8.9253E-08 2.0538E-06 # lat0 lon0 xBary yBary zBary JD0 -6.521789 158.131149 -0.298711 -0.107766 -0.943409 2456367.566228 # Heliocentric elements and errors Epoch: 2456360.5000 = 2013/03/09 Mean Anomaly: 2.27723 +/- 10.659 Argument of Peri: 214.02353 +/- 16.245 Long of Asc Node: 301.53739 +/- 0.036 Inclination: 10.47490 +/- 0.008 Eccentricity: 0.19658315 +/- 0.0014 Semi-Major Axis: 46.52684037 +/- 0.1579 Time of Perihelion: 2455627.2391 +/- 3432.3 Perihelion: 37.38044740 +/- 0.1422 Aphelion: 55.67323335 +/- 0.1996 Period (y) 317.3683 +/- 1.62 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -34.59717673 +/- 0.0763 Ecliptic Y 13.56642575 +/- 0.0306 Ecliptic Z -4.13980783 +/- 0.0094 Ecliptic XDOT -0.00109381 +/- 0.0001 Ecliptic YDOT -0.00284100 +/- 0.0001 Ecliptic ZDOT -0.00044710 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 37.39185144 +/- 0.0715 Geocenter to KBO 36.44694224 +/- 0.0828 # Hcoef: 7.52
The following table shows the complete astrometric record for 15DB250. 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 (15DB250) followed by the observatory code and reference code for the source of the astrometry.
2013 03 16.06545 10 29 24.44 +02 27 51.7 23.4r 15DB250 W84 C~4UG9 2013 03 16.13824 10 29 24.09 +02 27 53.8 15DB250 W84 C~4UG9 2013 03 16.20675 10 29 23.76 +02 27 55.8 15DB250 W84 C~4UG9 2015 02 17.25482 10 43 55.20 +00 28 43.6 23.8g 15DB250 W84 C~2iOX 2015 02 17.32377 10 43 54.84 +00 28 45.2 23.6g 15DB250 W84 C~2iOX 2015 02 17.37067 10 43 54.60 +00 28 46.2 23.7g 15DB250 W84 C~2iOX 2015 02 18.16530 10 43 50.69 +00 29 05.9 23.6g 15DB250 W84 C~2iOX 2015 02 18.30398 10 43 49.98 +00 29 09.5 23.9g 15DB250 W84 C~2iOX 2015 02 22.08708 10 43 31.09 +00 30 45.5 15DB250 W84 C~2iOX 2015 02 22.15439 10 43 30.73 +00 30 47.1 15DB250 W84 C~2iOX 2015 02 22.22300 10 43 30.38 +00 30 49.1 15DB250 W84 C~2iOX 2015 02 22.36038 10 43 29.73 +00 30 52.5 15DB250 W84 C~2iOX 2015 02 24.20076 10 43 20.41 +00 31 41.1 15DB250 W84 C~2iOX 2015 02 27.19913 10 43 05.25 +00 33 02.0 15DB250 W84 C~2iOX 2015 03 14.064225 10 41 50.74 +00 40 09.4 22.9i 15DB250 W84 C~4UG9 2015 03 14.141146 10 41 50.36 +00 40 11.6 22.8r 15DB250 W84 C~4UG9 2015 03 14.199398 10 41 50.06 +00 40 12.9 23.3g 15DB250 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 -0.01 0.00 -0.01
2 0.0002 -5.65 0.01 0.01 -0.01
3 0.0004 -10.98 0.00 0.04 0.02
4 1.9252 14801.16 0.04 -1806.38 0.15
5 1.9254 14795.52 -0.12 -1806.90 -0.01
6 1.9255 14791.79 -0.13 -1807.31 -0.17
7 1.9277 14729.70 0.02 -1810.76 0.03
8 1.9281 14718.42 -0.17 -1811.37 0.13
9 1.9385 14418.19 0.20 -1827.28 0.04
10 1.9386 14412.55 0.02 -1827.80 -0.20
11 1.9388 14406.91 -0.04 -1827.89 0.00
12 1.9392 14396.54 ( 0.75) -1828.35 ( 0.12)
13 1.9442 14247.98 0.04 -1835.05 -0.09
14 1.9525 14005.66 0.29 -1844.22 -0.11
15 1.9932 12804.17 -0.09 -1861.53 0.27
16 1.9934 12798.04 -0.04 -1861.59 0.20
17 1.9935 12793.36 -0.02 -1862.06 -0.25
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.
15DB250 quality flag:2 Type: SCATEXTD SCATNEAR SCATEXTD axisobj 46.347 47.387 46.289 ecceobj 0.193 0.253 0.192 incobj 10.487 10.513 10.487 qmin 36.575 34.447 36.557 qmax 56.727 62.571 56.552 amean 46.433 47.799 46.373 amin 46.034 46.926 45.978 amax 46.919 48.751 46.858 emean 0.195 0.261 0.194 emin 0.180 0.236 0.179 emax 0.210 0.284 0.208 imean 11.876 11.580 11.878 imin 11.164 10.751 11.168 imax 12.523 12.549 12.526 excite_mean 0.283 0.330 0.283 fracstop 1.000 1.000 1.000 cjmean 3.032 3.012 3.032 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 181.0 193.2 180.8 kozaiamp 180.0 180.0 180.0