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: 17BH231 # Created Mon May 6 01:17:57 2024 # Orbit generated from Bernstein formalism # Fitting 29 observations of 29 # Arc: 11.99d # First observation: 2017/01/21 # Last observation: 2017/02/02 Preliminary a, adot, b, bdot, g, gdot: 0.000001 0.026292 0.000000 -0.000357 0.024866 0.000000 # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # WARNING Fitting with energy constraint # Chi-squared of fit: 36.28 DOF: 53 RMS: 0.20 # Min/Max residuals: -0.35 0.56 # Exact a, adot, b, bdot, g, gdot: 1.555039E-05 2.308766E-02 -4.166162E-07 -6.117532E-04 2.427550E-02 9.239390E-03 # Covariance matrix: 1.2174E-12 1.8784E-09 1.5032E-13 1.5180E-10 3.2938E-10 4.5395E-09 1.8784E-09 3.1889E-06 2.5396E-10 2.5724E-07 5.5724E-07 6.4616E-06 1.5032E-13 2.5396E-10 1.2259E-13 1.6572E-11 4.4426E-11 5.8996E-10 1.5180E-10 2.5724E-07 1.6572E-11 2.1048E-08 4.4949E-08 5.1154E-07 3.2938E-10 5.5724E-07 4.4426E-11 4.4949E-08 9.7430E-08 1.2083E-06 4.5395E-09 6.4616E-06 5.8996E-10 5.1154E-07 1.2083E-06 1.4797E-04 # lat0 lon0 xBary yBary zBary JD0 -9.753515 151.956602 0.505619 -0.143211 -0.834216 2457774.986601 # Heliocentric elements and errors Epoch: 2457770.5000 = 2017/01/17 Mean Anomaly: 50.99815 +/- 48.360 Argument of Peri: 166.25095 +/- 22.641 Long of Asc Node: 251.53064 +/- 2.687 Inclination: 9.70970 +/- 0.083 Eccentricity: 0.37506172 +/- 0.5130 Semi-Major Axis: 47.75196177 +/- 23.9027 Time of Perihelion: 2440696.4254 +/- 9889.3 Perihelion: 29.84202894 +/- 28.6927 Aphelion: 65.66189460 +/- 40.9929 Period (y) 329.9856 +/- 247.77 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -36.34474347 +/- 0.4607 Ecliptic Y 19.92647564 +/- 0.2455 Ecliptic Z -6.97868603 +/- 0.0897 Ecliptic XDOT -0.00211747 +/- 0.0012 Ecliptic YDOT -0.00182754 +/- 0.0006 Ecliptic ZDOT -0.00024459 +/- 0.0002 # Distances at JD0 (AU) Heliocenter to KBO 42.03221227 +/- 0.4153 Geocenter to KBO 41.19379730 +/- 0.5297 # Hcoef: 9.20
The following table shows the complete astrometric record for 17BH231. 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 (17BH231) followed by the observatory code and reference code for the source of the astrometry.
2017 01 21.48580 10 01 55.58 +01 39 17.2 25.8z 17BH231 T09 C~7xTl 2017 01 21.51187 10 01 55.47 +01 39 17.7 24.8z 17BH231 T09 C~7xTl 2017 01 21.51563 10 01 55.45 +01 39 17.9 25.8z 17BH231 T09 C~7xTl 2017 01 21.52330 10 01 55.43 +01 39 17.6 24.7z 17BH231 T09 C~7xTl 2017 01 21.53790 10 01 55.37 +01 39 17.7 25.2z 17BH231 T09 C~7xTl 2017 01 21.54162 10 01 55.36 +01 39 18.1 24.5z 17BH231 T09 C~7xTl 2017 01 21.54547 10 01 55.34 +01 39 18.1 24.9z 17BH231 T09 C~7xTl 2017 01 21.56003 10 01 55.28 +01 39 18.4 25.2z 17BH231 T09 C~7xTl 2017 01 21.57598 10 01 55.21 +01 39 18.1 24.8z 17BH231 T09 C~7xTl 2017 01 21.58402 10 01 55.17 +01 39 18.7 24.8z 17BH231 T09 C~7xTl 2017 01 21.60021 10 01 55.12 +01 39 18.7 25.2z 17BH231 T09 C~7xTl 2017 01 23.35198 10 01 47.97 +01 39 44.4 25.9r 17BH231 T09 C~7xTl 2017 01 23.41024 10 01 47.69 +01 39 45.5 26.4r 17BH231 T09 C~7xTl 2017 01 23.56544 10 01 47.06 +01 39 48.1 25.9i 17BH231 T09 C~7xTl 2017 01 23.59193 10 01 46.92 +01 39 48.5 26.2i 17BH231 T09 C~7xTl 2017 01 30.39870 10 01 17.77 +01 41 43.6 24.8i 17BH231 T09 C~7xTl 2017 01 30.41709 10 01 17.68 +01 41 43.9 25.2i 17BH231 T09 C~7xTl 2017 01 30.44278 10 01 17.61 +01 41 44.8 25.4i 17BH231 T09 C~7xTl 2017 01 30.50920 10 01 17.27 +01 41 45.6 25.9z 17BH231 T09 C~7xTl 2017 01 30.54618 10 01 17.11 +01 41 46.3 24.8z 17BH231 T09 C~7xTl 2017 01 30.56834 10 01 17.02 +01 41 46.9 24.9z 17BH231 T09 C~7xTl 2017 01 30.57591 10 01 16.99 +01 41 46.9 25.8z 17BH231 T09 C~7xTl 2017 01 30.57975 10 01 16.96 +01 41 46.8 24.9z 17BH231 T09 C~7xTl 2017 01 30.59415 10 01 16.89 +01 41 47.1 24.9z 17BH231 T09 C~7xTl 2017 01 30.60170 10 01 16.90 +01 41 47.4 25.4z 17BH231 T09 C~7xTl 2017 02 02.42933 10 01 04.34 +01 42 41.5 25.5r 17BH231 T09 C~7xTl 2017 02 02.44070 10 01 04.29 +01 42 41.4 24.8r 17BH231 T09 C~7xTl 2017 02 02.47020 10 01 04.12 +01 42 42.2 25.3r 17BH231 T09 C~7xTl 2017 02 02.47353 10 01 04.10 +01 42 42.4 24.9r 17BH231 T09 C~7xTl
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 -0.11 0.00 0.00
2 0.0001 -1.72 -0.18 -0.11 0.11
3 0.0001 -2.07 -0.29 -0.03 0.23
4 0.0001 -2.25 0.02 -0.42 -0.10
5 0.0001 -3.12 0.07 -0.64 -0.20
6 0.0002 -3.40 0.02 -0.32 0.16
7 0.0002 -3.69 -0.02 -0.42 0.08
8 0.0002 -4.63 -0.04 -0.46 0.17
9 0.0002 -5.51 0.09 -1.11 -0.35
10 0.0003 -6.28 -0.18 -0.75 0.07
11 0.0003 -6.98 0.14 -1.02 -0.05
12 0.0051 -116.39 0.56 -14.61 -0.17
13 0.0053 -120.70 -0.00 -15.05 -0.16
14 0.0057 -130.46 0.29 -15.93 0.19
15 0.0058 -132.57 -0.10 -16.30 0.03
16 0.0244 -582.21 -0.18 -62.01 -0.09
17 0.0245 -583.58 -0.28 -62.21 -0.16
18 0.0245 -584.88 0.21 -61.73 0.47
19 0.0247 -589.94 -0.23 -62.77 -0.15
20 0.0248 -592.43 -0.16 -62.96 -0.10
21 0.0249 -593.90 -0.09 -62.87 0.12
22 0.0249 -594.32 0.01 -63.03 0.01
23 0.0249 -594.71 -0.11 -63.28 -0.21
24 0.0249 -595.80 -0.20 -63.37 -0.21
25 0.0250 -595.76 0.36 -63.04 0.17
26 0.0327 -791.09 0.30 -78.50 0.22
27 0.0327 -791.75 0.44 -78.86 -0.08
28 0.0328 -794.42 -0.13 -79.01 -0.06
29 0.0328 -794.77 -0.24 -78.93 0.04
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.
17BH231 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