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 Apr 28 01:11:02 2025 # Orbit generated from Bernstein formalism # Fitting 36 observations of 41 # Arc: 2.37y # First observation: 2016/12/23 # Last observation: 2019/05/09 Preliminary a, adot, b, bdot, g, gdot: 0.000028 0.024183 0.000004 -0.000496 0.024554 0.000000 # Chi-squared of fit: 20.14 DOF: 66 RMS: 0.13 # Min/Max residuals: -0.32 0.26 # Exact a, adot, b, bdot, g, gdot: 1.529223E-05 2.394176E-02 -1.041648E-06 -4.874359E-04 2.424198E-02 -2.341705E-03 # Covariance matrix: 2.8388E-13 2.5711E-12 6.6205E-14 -1.1006E-13 1.4342E-12 1.2865E-10 2.5711E-12 3.5347E-11 7.8146E-13 -1.4609E-12 1.7789E-11 1.8013E-09 6.6205E-14 7.8146E-13 7.1971E-14 -6.6324E-14 4.2060E-13 3.8956E-11 -1.1006E-13 -1.4609E-12 -6.6324E-14 1.4925E-13 -7.4373E-13 -7.4391E-11 1.4342E-12 1.7789E-11 4.2060E-13 -7.4373E-13 9.3482E-12 8.9507E-10 1.2865E-10 1.8013E-09 3.8956E-11 -7.4391E-11 8.9507E-10 9.2526E-08 # lat0 lon0 xBary yBary zBary JD0 -9.666753 152.342565 0.861188 -0.080923 -0.476254 2457745.976620 # Heliocentric elements and errors Epoch: 2457740.5000 = 2016/12/18 Mean Anomaly: 297.71669 +/- 0.556 Argument of Peri: 338.01606 +/- 1.708 Long of Asc Node: 249.37311 +/- 0.009 Inclination: 9.65053 +/- 0.000 Eccentricity: 0.12776745 +/- 0.0125 Semi-Major Axis: 43.72988956 +/- 0.1190 Time of Perihelion: 2476014.5663 +/- 144.9 Perihelion: 38.14263301 +/- 0.5575 Aphelion: 49.31714611 +/- 0.5640 Period (y) 289.1850 +/- 1.18 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -36.05043233 +/- 0.0045 Ecliptic Y 19.85865446 +/- 0.0024 Ecliptic Z -6.92680358 +/- 0.0009 Ecliptic XDOT -0.00101347 +/- 0.0000 Ecliptic YDOT -0.00252701 +/- 0.0000 Ecliptic ZDOT -0.00000991 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.73703914 +/- 0.0041 Geocenter to KBO 41.25076353 +/- 0.0052 # Hcoef: 9.24
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.
2016 12 23.475831 10 03 28.41 +01 36 07.7 17BH231 T09 C~81Bm 2017 01 02.526894 10 03 02.69 +01 36 19.6 17BH231 T09 C~81Bm 2017 01 02.549453 10 03 02.62 +01 36 19.9 17BH231 T09 C~81Bm 2017 01 02.586101 10 03 02.50 +01 36 20.1 17BH231 T09 C~81Bm 2017 01 02.635162 10 03 02.34 +01 36 20.4 17BH231 T09 C~81Bm 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 2018 01 17.461210 10 07 21.69 +01 07 21.6 17BH231 T09 C~81Bm 2018 01 17.518288 10 07 21.47 +01 07 22.2 17BH231 T09 C~81Bm 2018 01 17.545345 10 07 21.37 +01 07 22.5 17BH231 T09 C~81Bm 2018 01 17.572223 10 07 21.26 +01 07 22.6 17BH231 T09 C~81Bm 2019 05 09.256100 10 06 06.73 +01 20 22.4 17BH231 T09 C~81Bm 2019 05 09.305828 10 06 06.72 +01 20 22.9 17BH231 T09 C~81Bm 2019 05 09.378044 10 06 06.69 +01 20 24.1 17BH231 T09 C~81Bm
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 0.07 0.00 0.15
2 0.0275 -365.10 0.25 -124.78 -0.12
3 0.0276 -366.19 0.16 -124.87 0.07
4 0.0277 -367.94 0.01 -125.32 0.06
5 0.0278 -370.29 -0.18 -125.88 0.09
6 0.0794 -1369.41 -0.08 -313.13 0.02
7 0.0795 -1371.13 -0.16 -313.24 0.13
8 0.0795 -1371.48 -0.27 -313.16 0.25
9 0.0795 -1371.65 0.04 -313.54 -0.08
10 0.0796 -1372.53 0.09 -313.77 -0.17
11 0.0796 -1372.81 0.04 -313.45 0.18
12 0.0796 -1373.09 0.00 -313.55 0.11
13 0.0796 -1374.04 -0.02 -313.59 0.19
14 0.0797 -1374.92 0.11 -314.24 -0.32
15 0.0797 -1375.69 -0.16 -313.89 0.09
16 0.0797 -1376.39 0.16 -314.15 -0.03
17 0.0845 -1485.78 ( 0.54) -327.87 ( -0.14)
18 0.0847 -1490.10 -0.03 -328.32 -0.13
19 0.0851 -1499.86 0.26 -329.21 0.22
20 0.0852 -1501.96 -0.13 -329.58 0.07
21 0.1038 -1951.59 -0.08 -375.81 -0.06
22 0.1039 -1952.96 -0.17 -376.00 -0.13
23 0.1039 -1954.26 ( 0.31) -375.53 ( 0.50)
24 0.1041 -1959.31 -0.12 -376.58 -0.12
25 0.1042 -1961.80 -0.04 -376.77 -0.07
26 0.1043 -1963.28 0.02 -376.68 0.15
27 0.1043 -1963.70 0.13 -376.84 0.04
28 0.1043 -1964.08 0.01 -377.09 -0.18
29 0.1044 -1965.17 -0.08 -377.18 -0.18
30 0.1044 -1965.14 ( 0.48) -376.84 ( 0.20)
31 0.1121 -2160.46 ( 0.60) -392.54 ( 0.23)
32 0.1122 -2161.13 ( 0.75) -392.90 ( -0.07)
33 0.1122 -2163.79 0.18 -393.04 -0.05
34 0.1122 -2164.15 0.06 -392.96 0.05
35 1.0677 3882.64 -0.10 -381.55 -0.01
36 1.0679 3879.34 -0.06 -382.16 -0.07
37 1.0680 3877.83 0.01 -382.40 -0.06
38 1.0680 3876.25 0.00 -382.89 -0.30
39 2.3731 2554.99 -0.09 -47.49 0.22
40 2.3733 2554.67 0.13 -47.08 -0.01
41 2.3734 2553.82 0.03 -46.11 -0.01
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:2 Type: CLASSICAL 7:4EEE CLASSICAL axisobj 43.475 43.731 43.327 ecceobj 0.121 0.154 0.090 incobj 9.635 9.634 9.636 qmin 37.000 35.788 38.721 qmax 50.528 52.183 48.269 amean 43.575 43.726 43.391 amin 43.192 43.280 43.056 amax 43.980 44.208 43.759 emean 0.125 0.152 0.089 emin 0.105 0.113 0.075 emax 0.149 0.182 0.104 imean 11.321 11.425 11.245 imin 10.486 9.935 10.563 imax 12.145 12.992 11.872 excite_mean 0.233 0.251 0.215 fracstop 1.000 1.000 1.000 cjmean 3.031 3.022 3.039 libcent 0 -180.0 182.1 -180.0 libamp 0 -180.0 149.8 -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 175.0 143.9 175.2 kozaiamp 180.0 180.0 180.0