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: 17BZ244 # Created Sun Dec 22 02:10:56 2024 # Orbit generated from Bernstein formalism # Fitting 24 observations of 24 # Arc: 1.87y # First observation: 2015/03/22 # Last observation: 2017/02/01 Preliminary a, adot, b, bdot, g, gdot: -0.000682 0.020565 0.000041 0.000933 0.021501 0.000000 # Chi-squared of fit: 24.79 DOF: 42 RMS: 0.18 # Min/Max residuals: -0.60 0.38 # Exact a, adot, b, bdot, g, gdot: 1.408688E-05 1.992848E-02 9.416679E-07 9.597698E-04 2.225773E-02 2.003613E-03 # Covariance matrix: 1.4597E-12 -2.1104E-12 3.7625E-14 -7.3968E-14 -1.0149E-12 -3.2009E-11 -2.1104E-12 4.3113E-12 -1.2090E-13 2.0192E-13 3.0313E-12 8.3789E-11 3.7625E-14 -1.2090E-13 6.9938E-13 -4.3028E-13 -1.4722E-13 -3.1980E-12 -7.3968E-14 2.0192E-13 -4.3028E-13 2.9405E-13 1.9785E-13 4.7572E-12 -1.0149E-12 3.0313E-12 -1.4722E-13 1.9785E-13 3.3825E-12 7.6428E-11 -3.2009E-11 8.3789E-11 -3.1980E-12 4.7572E-12 7.6428E-11 1.9052E-09 # lat0 lon0 xBary yBary zBary JD0 -14.543791 143.007253 -0.615484 -0.195650 -0.754647 2457103.936764 # Heliocentric elements and errors Epoch: 2457100.5000 = 2015/03/19 Mean Anomaly: 109.78838 +/- 0.488 Argument of Peri: 158.75092 +/- 0.461 Long of Asc Node: 222.12005 +/- 0.006 Inclination: 14.58583 +/- 0.000 Eccentricity: 0.12578091 +/- 0.0018 Semi-Major Axis: 43.28117120 +/- 0.0134 Time of Perihelion: 2425382.8638 +/- 140.3 Perihelion: 37.83722602 +/- 0.0769 Aphelion: 48.72511638 +/- 0.0774 Period (y) 284.7454 +/- 0.13 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -35.73133851 +/- 0.0029 Ecliptic Y 26.14506358 +/- 0.0021 Ecliptic Z -11.28230631 +/- 0.0009 Ecliptic XDOT -0.00169261 +/- 0.0000 Ecliptic YDOT -0.00180232 +/- 0.0000 Ecliptic ZDOT 0.00005247 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 45.69007920 +/- 0.0026 Geocenter to KBO 44.92820441 +/- 0.0037 # Hcoef: 8.31
The following table shows the complete astrometric record for 17BZ244. 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 (17BZ244) followed by the observatory code and reference code for the source of the astrometry.
2015 03 22.435986 09 22 32.34 +00 04 24.1 17BZ244 T09 C~89UU 2016 04 02.322882 09 26 25.16 -00 08 47.5 17BZ244 T09 C~89UU 2016 04 02.34721 09 26 25.09 -00 08 46.8 25.0i 17BZ244 T09 C~8COq 2016 04 02.352343 09 26 25.08 -00 08 46.8 17BZ244 T09 C~89UU 2016 04 04.24125 09 26 20.87 -00 07 54.4 25.6g 17BZ244 T09 C~8COq 2016 04 04.249044 09 26 20.86 -00 07 54.5 17BZ244 T09 C~89UU 2016 04 04.263886 09 26 20.82 -00 07 54.0 17BZ244 T09 C~89UU 2016 04 04.27871 09 26 20.78 -00 07 53.5 25.9g 17BZ244 T09 C~8COq 2016 11 28.510695 09 37 35.62 -00 54 28.2 17BZ244 T09 C~89UU 2016 11 28.559107 09 37 35.59 -00 54 28.6 17BZ244 T09 C~89UU 2016 11 28.57602 09 37 35.54 -00 54 28.9 26.4r 17BZ244 T09 C~8COq 2016 11 28.578104 09 37 35.57 -00 54 29.1 17BZ244 T09 C~89UU 2016 11 28.62886 09 37 35.48 -00 54 29.9 26.4r 17BZ244 T09 C~8COq 2016 11 29.509563 09 37 34.98 -00 54 44.3 17BZ244 T09 C~89UU 2017 01 21.36520 09 35 18.88 -00 56 07.6 24.4z 17BZ244 T09 C~89UU 2017 01 21.38272 09 35 18.79 -00 56 07.1 23.8z 17BZ244 T09 C~89UU 2017 01 21.39079 09 35 18.76 -00 56 06.9 24.4z 17BZ244 T09 C~89UU 2017 01 21.40149 09 35 18.72 -00 56 06.8 24.4z 17BZ244 T09 C~89UU 2017 01 28.382983 09 34 49.97 -00 54 25.4 17BZ244 T09 C~89UU 2017 01 28.401948 09 34 49.90 -00 54 25.0 17BZ244 T09 C~89UU 2017 02 01.54186 09 34 32.28 -00 53 14.1 24.3i 17BZ244 T09 C~89UU 2017 02 01.55002 09 34 32.27 -00 53 13.7 24.0i 17BZ244 T09 C~89UU 2017 02 01.57762 09 34 32.13 -00 53 13.4 24.3i 17BZ244 T09 C~89UU 2017 02 01.58031 09 34 32.14 -00 53 13.4 24.0i 17BZ244 T09 C~89UU
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 -0.05
2 1.0319 3563.21 0.08 358.99 0.05
3 1.0319 3561.99 -0.10 359.32 0.01
4 1.0319 3561.85 -0.03 359.27 -0.11
5 1.0371 3485.30 -0.06 388.89 0.22
6 1.0371 3485.19 0.15 388.75 -0.04
7 1.0372 3484.46 0.02 389.04 0.02
8 1.0372 3483.74 -0.10 389.32 0.07
9 1.6895 13990.57 0.38 954.69 -0.16
10 1.6896 13990.27 0.27 954.17 0.22
11 1.6896 13989.65 -0.28 953.65 0.01
12 1.6896 13990.14 0.22 953.60 -0.00
13 1.6898 13989.11 -0.60 952.41 -0.24
14 1.6922 13986.56 0.08 936.34 -0.21
15 1.8369 12069.52 0.18 208.07 -0.28
16 1.8370 12068.07 -0.18 208.11 -0.11
17 1.8370 12067.58 -0.17 208.16 -0.00
18 1.8370 12066.98 -0.10 208.06 -0.02
19 1.8561 11624.44 0.14 167.31 0.04
20 1.8562 11623.31 0.27 167.36 0.18
21 1.8675 11349.35 -0.23 150.70 -0.04
22 1.8675 11349.08 0.06 151.03 0.32
23 1.8676 11346.99 -0.17 150.65 0.04
24 1.8676 11347.13 0.16 150.70 0.09
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.
17BZ244 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 43.110 43.151 43.071 ecceobj 0.132 0.136 0.128 incobj 14.584 14.584 14.584 qmin 36.057 36.700 36.503 qmax 50.520 49.839 49.901 amean 43.129 43.129 43.068 amin 42.770 42.779 42.703 amax 43.544 43.526 43.480 emean 0.140 0.131 0.133 emin 0.120 0.115 0.117 emax 0.162 0.146 0.150 imean 15.510 15.839 15.770 imin 14.610 15.232 15.049 imax 16.359 16.431 16.432 excite_mean 0.302 0.303 0.303 fracstop 1.000 1.000 1.000 cjmean 2.982 2.981 2.980 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 188.2 187.7 181.9 kozaiamp 180.0 180.0 180.0