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: 17BM231 # Created Sun Dec 22 02:10:54 2024 # Orbit generated from Bernstein formalism # Fitting 25 observations of 25 # Arc: 3.73y # First observation: 2015/03/22 # Last observation: 2018/12/12 Preliminary a, adot, b, bdot, g, gdot: 0.000353 0.037601 0.000031 0.004425 0.031828 0.000000 # Chi-squared of fit: 12.32 DOF: 44 RMS: 0.12 # Min/Max residuals: -0.27 0.27 # Exact a, adot, b, bdot, g, gdot: 1.866963E-05 3.760080E-02 2.242009E-06 4.444422E-03 3.209634E-02 1.296071E-04 # Covariance matrix: 4.5180E-13 -3.5751E-13 1.6584E-14 -2.2919E-14 -5.3792E-14 -1.3887E-12 -3.5751E-13 4.3954E-13 -2.5833E-14 3.2974E-14 -5.5229E-14 1.9373E-12 1.6584E-14 -2.5833E-14 2.9895E-13 -1.4095E-13 5.3969E-16 -1.4746E-13 -2.2919E-14 3.2974E-14 -1.4095E-13 8.3738E-14 6.5482E-15 2.0538E-13 -5.3792E-14 -5.5229E-14 5.3969E-16 6.5482E-15 3.6995E-13 5.5871E-13 -1.3887E-12 1.9373E-12 -1.4746E-13 2.0538E-13 5.5871E-13 1.2478E-11 # lat0 lon0 xBary yBary zBary JD0 -13.618664 142.431917 -0.622482 -0.182116 -0.752266 2457103.879016 # Heliocentric elements and errors Epoch: 2457100.5000 = 2015/03/19 Mean Anomaly: 8.74443 +/- 0.033 Argument of Peri: 285.76445 +/- 0.044 Long of Asc Node: 205.50390 +/- 0.001 Inclination: 14.98497 +/- 0.000 Eccentricity: 0.13176391 +/- 0.0001 Semi-Major Axis: 36.67565292 +/- 0.0039 Time of Perihelion: 2455129.9191 +/- 7.5 Perihelion: 31.84312535 +/- 0.0046 Aphelion: 41.50818050 +/- 0.0054 Period (y) 222.1135 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -24.99752329 +/- 0.0005 Ecliptic Y 18.44043702 +/- 0.0003 Ecliptic Z -7.33591866 +/- 0.0001 Ecliptic XDOT -0.00203821 +/- 0.0000 Ecliptic YDOT -0.00248709 +/- 0.0000 Ecliptic ZDOT 0.00036594 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 31.91773160 +/- 0.0004 Geocenter to KBO 31.15620111 +/- 0.0006 # Hcoef: 9.35
The following table shows the complete astrometric record for 17BM231. 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 (17BM231) followed by the observatory code and reference code for the source of the astrometry.
2015 03 22.378238 09 21 35.57 +01 07 39.2 17BM231 T09 C~81Bn 2015 03 22.379982 09 21 35.56 +01 07 39.3 17BM231 T09 C~81Bn 2015 03 22.456321 09 21 35.26 +01 07 42.3 17BM231 T09 C~81Bn 2016 04 04.246919 09 29 18.48 +00 50 12.8 17BM231 T09 C~81Bn 2016 04 04.253297 09 29 18.46 +00 50 13.1 17BM231 T09 C~81Bn 2016 12 25.46448 09 46 00.29 -00 22 43.6 24.7r 17BM231 T09 C~7xTm 2016 12 25.48124 09 46 00.24 -00 22 43.9 24.4r 17BM231 T09 C~7xTm 2016 12 25.49171 09 46 00.20 -00 22 43.7 24.7r 17BM231 T09 C~7xTm 2016 12 25.50217 09 46 00.18 -00 22 43.9 24.5r 17BM231 T09 C~7xTm 2017 01 21.37737 09 44 01.96 -00 18 44.1 24.0z 17BM231 T09 C~7xTm 2017 01 21.56723 09 44 00.92 -00 18 40.2 23.7z 17BM231 T09 C~7xTm 2017 01 21.63253 09 44 00.56 -00 18 39.0 23.9z 17BM231 T09 C~7xTm 2017 01 21.64058 09 44 00.54 -00 18 38.8 23.9z 17BM231 T09 C~7xTm 2017 01 28.43816 09 43 23.14 -00 16 12.0 26.0g 17BM231 T09 C~7xTm 2017 01 28.45502 09 43 23.03 -00 16 11.7 25.6g 17BM231 T09 C~7xTm 2017 01 28.47182 09 43 22.94 -00 16 11.0 25.2g 17BM231 T09 C~7xTm 2017 01 28.47671 09 43 22.93 -00 16 11.0 26.0g 17BM231 T09 C~7xTm 2017 03 04.39116 09 40 01.57 +00 02 59.8 23.8i 17BM231 T09 C~7xTm 2017 03 04.41889 09 40 01.40 +00 03 00.6 24.0i 17BM231 T09 C~7xTm 2017 03 04.42156 09 40 01.39 +00 03 00.8 24.2i 17BM231 T09 C~7xTm 2017 03 04.42430 09 40 01.39 +00 03 00.9 24.1i 17BM231 T09 C~7xTm 2017 03 04.42698 09 40 01.36 +00 03 01.1 24.0i 17BM231 T09 C~7xTm 2017 03 04.43238 09 40 01.33 +00 03 01.3 24.1i 17BM231 T09 C~7xTm 2018 12 12.299673 10 03 13.301 -01 12 51.62 23.3r 17BM231 W84 C~8HJz 2018 12 12.300471 10 03 13.301 -01 12 51.77 23.9g 17BM231 W84 C~8HK0
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 -0.03 0.00 -0.01
2 0.0000 -0.17 -0.08 0.05 0.00
3 0.0002 -5.39 0.07 1.48 0.01
4 1.0373 6920.67 0.08 1198.91 -0.11
5 1.0373 6920.29 0.04 1199.10 -0.06
6 1.7634 22648.68 -0.05 1802.42 0.10
7 1.7635 22648.06 0.12 1801.90 -0.13
8 1.7635 22647.42 -0.02 1801.90 0.06
9 1.7635 22647.19 0.25 1801.61 -0.05
10 1.8371 20869.25 0.12 1466.14 -0.02
11 1.8376 20853.05 -0.07 1464.90 0.19
12 1.8378 20847.49 -0.13 1464.33 0.11
13 1.8378 20847.14 0.20 1464.42 0.27
14 1.8564 20262.73 -0.12 1426.02 0.02
15 1.8565 20261.05 -0.27 1425.78 -0.14
16 1.8565 20259.54 -0.27 1426.02 0.18
17 1.8565 20259.39 0.03 1425.97 0.15
18 1.9521 17003.65 0.09 1562.57 0.10
19 1.9522 17000.96 -0.06 1562.52 -0.26
20 1.9522 17000.75 -0.02 1562.67 -0.15
21 1.9522 17000.72 0.20 1562.76 -0.09
22 1.9522 17000.23 -0.05 1562.81 -0.07
23 1.9522 16999.73 -0.05 1562.86 -0.08
24 3.7260 38655.98 -0.02 3879.40 0.05
25 3.7260 38656.02 0.04 3879.26 -0.08
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.
17BM231 quality flag:3 Type: 4:3E 4:3E 4:3E axisobj 36.535 36.548 36.523 ecceobj 0.128 0.128 0.128 incobj 14.990 14.990 14.990 qmin 29.963 29.940 29.977 qmax 43.353 43.234 43.386 amean 36.476 36.476 36.476 amin 36.153 36.139 36.140 amax 36.852 36.853 36.841 emean 0.143 0.143 0.142 emin 0.101 0.102 0.102 emax 0.178 0.176 0.179 imean 15.414 15.404 15.431 imin 14.072 14.063 14.098 imax 16.814 16.803 16.844 excite_mean 0.302 0.302 0.302 fracstop 1.000 1.000 1.000 cjmean 2.925 2.925 2.925 libcent 0 179.2 180.2 180.5 libamp 0 64.1 62.4 65.4 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 181.4 181.5 181.6 kozaiamp 180.0 180.0 180.0