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: 15DO248 # Created Thu Apr 25 01:16:55 2024 # Orbit generated from Bernstein formalism # Fitting 12 observations of 12 # Arc: 5.19d # First observation: 2015/02/17 # Last observation: 2015/02/22 Preliminary a, adot, b, bdot, g, gdot: -0.000001 0.039244 0.000000 0.004992 0.028252 0.000000 # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # WARNING Fitting with energy constraint # WARNING MRQMIN stopped after 15 iterations -- oscilliatory solution # Chi-squared of fit: 17.23 DOF: 19 RMS: 0.21 # Min/Max residuals: -0.57 0.36 # Exact a, adot, b, bdot, g, gdot: 1.482332E-05 2.680927E-02 3.074269E-06 5.688201E-03 2.628083E-02 8.527365E-03 # Covariance matrix: 3.8901E-11 6.2875E-08 -2.8594E-13 -3.5090E-09 1.0007E-08 -7.4868E-08 6.2875E-08 1.0242E-04 -4.6522E-10 -5.7137E-06 1.6294E-05 -1.2342E-04 -2.8594E-13 -4.6522E-10 2.6989E-13 1.8240E-12 -7.4033E-11 5.0203E-10 -3.5090E-09 -5.7137E-06 1.8240E-12 3.2277E-07 -9.0901E-07 6.9087E-06 1.0007E-08 1.6294E-05 -7.4033E-11 -9.0901E-07 2.5923E-06 -1.9554E-05 -7.4868E-08 -1.2342E-04 5.0203E-10 6.9087E-06 -1.9554E-05 3.9955E-04 # lat0 lon0 xBary yBary zBary JD0 -20.171971 140.787057 -0.120735 -0.336995 -0.917867 2457070.609368 # Heliocentric elements and errors Epoch: 2457070.5000 = 2015/02/17 Mean Anomaly: 41.42222 +/- 49.126 Argument of Peri: 222.40656 +/- 99.660 Long of Asc Node: 198.99534 +/- 11.790 Inclination: 22.85750 +/- 2.666 Eccentricity: 0.34749171 +/- 0.6663 Semi-Major Axis: 47.65570891 +/- 25.4727 Time of Perihelion: 2443244.3352 +/- 12082.6 Perihelion: 31.09574499 +/- 35.8405 Aphelion: 64.21567284 +/- 46.7593 Period (y) 328.9884 +/- 263.77 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -28.51060233 +/- 1.6952 Ecliptic Y 23.10498774 +/- 1.3835 Ecliptic Z -13.12125630 +/- 0.8039 Ecliptic XDOT -0.00257374 +/- 0.0013 Ecliptic YDOT -0.00151315 +/- 0.0018 Ecliptic ZDOT 0.00024998 +/- 0.0007 # Distances at JD0 (AU) Heliocenter to KBO 38.97258357 +/- 1.5113 Geocenter to KBO 38.05055137 +/- 2.3311 # Hcoef: 7.83
The following table shows the complete astrometric record for 15DO248. 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 (15DO248) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.10859 09 07 25.39 -04 36 27.6 24.8g 15DO248 W84 C~2iOU 2015 02 17.19356 09 07 24.96 -04 36 24.9 24.3g 15DO248 W84 C~2iOU 2015 02 17.26222 09 07 24.61 -04 36 22.9 23.9g 15DO248 W84 C~2iOU 2015 02 18.03728 09 07 20.87 -04 35 58.9 23.8g 15DO248 W84 C~2iOU 2015 02 18.31138 09 07 19.53 -04 35 50.2 23.9g 15DO248 W84 C~2iOU 2015 02 19.10178 09 07 15.72 -04 35 25.2 24.3g 15DO248 W84 C~2iOU 2015 02 19.23925 09 07 15.03 -04 35 20.6 24.4g 15DO248 W84 C~2iOU 2015 02 19.30837 09 07 14.74 -04 35 18.6 23.7g 15DO248 W84 C~2iOU 2015 02 22.09428 09 07 01.49 -04 33 47.9 15DO248 W84 C~2iOU 2015 02 22.16159 09 07 01.16 -04 33 45.9 15DO248 W84 C~2iOU 2015 02 22.23026 09 07 00.85 -04 33 44.2 15DO248 W84 C~2iOU 2015 02 22.29898 09 07 00.54 -04 33 41.5 15DO248 W84 C~2iOU
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 0.27 0.00 0.07
2 0.0002 -6.95 0.10 0.58 0.10
3 0.0004 -12.54 -0.02 0.86 -0.07
4 0.0025 -73.14 -0.00 6.40 -0.16
5 0.0033 -94.89 0.03 8.47 -0.03
6 0.0055 -156.79 -0.24 14.63 -0.07
7 0.0058 -168.03 -0.57 15.82 0.06
8 0.0060 -172.77 0.15 16.38 0.08
9 0.0137 -389.22 -0.17 41.35 0.30
10 0.0138 -394.53 -0.21 41.73 0.05
11 0.0140 -399.47 0.24 41.91 -0.41
12 0.0142 -404.71 0.36 43.05 0.07
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.
15DO248 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