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: 17FT232 # Created Tue May 7 01:17:27 2024 # Orbit generated from Bernstein formalism # Fitting 16 observations of 16 # Arc: 52.98d # First observation: 2017/01/28 # Last observation: 2017/03/22 Preliminary a, adot, b, bdot, g, gdot: -0.000001 0.028430 -0.000000 -0.005084 0.026704 0.000000 # Chi-squared of fit: 3.33 DOF: 26 RMS: 0.08 # Min/Max residuals: -0.20 0.15 # Exact a, adot, b, bdot, g, gdot: 1.710198E-05 2.901686E-02 -2.913638E-06 -5.087152E-03 2.680226E-02 -5.606238E-04 # Covariance matrix: 3.2951E-13 2.2024E-10 1.0501E-13 -1.8181E-12 4.0282E-11 1.2820E-09 2.2024E-10 4.1056E-07 1.7857E-10 -2.1526E-09 6.9704E-08 8.3758E-07 1.0501E-13 1.7857E-10 2.1031E-13 -2.0092E-12 3.0623E-11 4.5704E-10 -1.8181E-12 -2.1526E-09 -2.0092E-12 4.1835E-11 -3.8824E-10 -1.1344E-08 4.0282E-11 6.9704E-08 3.0623E-11 -3.8824E-10 1.1929E-08 1.7093E-07 1.2820E-09 8.3758E-07 4.5704E-10 -1.1344E-08 1.7093E-07 1.0484E-05 # lat0 lon0 xBary yBary zBary JD0 -10.163944 154.041717 0.429145 -0.156505 -0.873959 2457782.018431 # Heliocentric elements and errors Epoch: 2457780.5000 = 2017/01/27 Mean Anomaly: 351.36478 +/- 28.884 Argument of Peri: 237.54654 +/- 41.812 Long of Asc Node: 289.20564 +/- 0.592 Inclination: 14.09579 +/- 0.144 Eccentricity: 0.17587772 +/- 0.0348 Semi-Major Axis: 46.17408463 +/- 1.7458 Time of Perihelion: 2460529.4484 +/- 9193.7 Perihelion: 38.05309169 +/- 2.1582 Aphelion: 54.29507757 +/- 2.6080 Period (y) 313.7658 +/- 17.79 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -33.63373814 +/- 0.1345 Ecliptic Y 16.84482277 +/- 0.0655 Ecliptic Z -6.58410046 +/- 0.0268 Ecliptic XDOT -0.00116141 +/- 0.0003 Ecliptic YDOT -0.00273655 +/- 0.0001 Ecliptic ZDOT -0.00050145 +/- 0.0001 # Distances at JD0 (AU) Heliocenter to KBO 38.18804491 +/- 0.1221 Geocenter to KBO 37.31029163 +/- 0.1520 # Hcoef: 8.30
The following table shows the complete astrometric record for 17FT232. 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 (17FT232) followed by the observatory code and reference code for the source of the astrometry.
2017 01 28.51763 10 09 01.63 +00 32 34.9 23.8z 17FT232 T09 C~7xUH 2017 01 28.52565 10 09 01.60 +00 32 35.0 23.7z 17FT232 T09 C~7xUH 2017 01 28.53098 10 09 01.56 +00 32 35.2 23.8z 17FT232 T09 C~7xUH 2017 01 28.54169 10 09 01.52 +00 32 35.4 23.4z 17FT232 T09 C~7xUH 2017 01 28.55510 10 09 01.45 +00 32 35.5 23.8z 17FT232 T09 C~7xUH 2017 01 28.57125 10 09 01.37 +00 32 35.7 24.1z 17FT232 T09 C~7xUH 2017 01 28.58466 10 09 01.32 +00 32 35.9 23.8z 17FT232 T09 C~7xUH 2017 02 02.38415 10 08 38.64 +00 33 56.5 24.8r 17FT232 T09 C~7xUH 2017 02 02.50623 10 08 38.05 +00 33 58.8 24.3r 17FT232 T09 C~7xUH 2017 02 02.51130 10 08 38.02 +00 33 59.0 24.3r 17FT232 T09 C~7xUH 2017 02 02.52702 10 08 37.95 +00 33 59.2 24.2r 17FT232 T09 C~7xUH 2017 02 02.53379 10 08 37.91 +00 33 59.3 24.2r 17FT232 T09 C~7xUH 2017 03 22.39453 10 04 47.00 +00 54 20.9 23.7z 17FT232 T09 C~7xUH 2017 03 22.44588 10 04 46.78 +00 54 22.4 23.9z 17FT232 T09 C~7xUH 2017 03 22.47157 10 04 46.67 +00 54 22.9 23.6z 17FT232 T09 C~7xUH 2017 03 22.49332 10 04 46.58 +00 54 23.4 24.1z 17FT232 T09 C~7xUH
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 0.00 0.00 -0.02
2 0.0000 -0.46 0.12 -0.07 0.00
3 0.0000 -1.09 -0.13 -0.10 0.03
4 0.0001 -1.72 0.01 -0.12 0.12
5 0.0001 -2.74 -0.04 -0.41 -0.02
6 0.0001 -3.93 -0.08 -0.65 -0.09
7 0.0002 -4.70 0.11 -0.73 -0.02
8 0.0133 -351.21 -0.03 -47.13 -0.13
9 0.0137 -360.30 0.05 -48.15 0.01
10 0.0137 -360.79 -0.06 -48.12 0.08
11 0.0137 -361.84 0.07 -48.31 0.04
12 0.0137 -362.44 -0.02 -48.43 -0.01
13 0.1448 -4034.14 0.01 -145.94 0.14
14 0.1449 -4037.76 -0.06 -145.72 0.15
15 0.1450 -4039.48 -0.00 -145.84 -0.09
16 0.1450 -4040.92 0.05 -145.86 -0.20
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.
17FT232 quality flag:1 Type: SCATEXTD SCATNEAR SCATEXTD axisobj 45.899 58.933 40.704 ecceobj 0.169 0.415 0.088 incobj 14.082 13.771 14.600 qmin 37.458 32.774 36.533 qmax 54.783 87.190 45.214 amean 45.925 58.861 40.753 amin 45.532 57.615 40.428 amax 46.381 60.459 41.089 emean 0.167 0.423 0.081 emin 0.155 0.401 0.064 emax 0.182 0.447 0.101 imean 15.741 14.197 16.314 imin 15.238 12.638 15.253 imax 16.230 15.604 17.170 excite_mean 0.319 0.489 0.293 fracstop 1.000 1.000 1.000 cjmean 2.999 2.967 2.964 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 178.8 185.8 179.2 kozaiamp 180.0 180.0 180.0