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: 17BK231 # Created Tue May 7 01:17:23 2024 # Orbit generated from Bernstein formalism # Fitting 47 observations of 47 # Arc: 67.83d # First observation: 2016/11/25 # Last observation: 2017/02/01 Preliminary a, adot, b, bdot, g, gdot: -0.000002 0.031491 0.000012 0.002027 0.027612 0.000000 # Chi-squared of fit: 46.02 DOF: 88 RMS: 0.17 # Min/Max residuals: -1.04 0.51 # Exact a, adot, b, bdot, g, gdot: 1.759999E-05 3.017642E-02 1.525389E-06 1.865106E-03 2.682179E-02 2.363428E-03 # Covariance matrix: 1.7296E-13 -3.6286E-12 -8.6016E-15 -6.1575E-13 -8.4261E-13 -2.8470E-11 -3.6286E-12 4.8570E-10 3.6976E-12 7.9407E-11 2.2483E-10 2.9129E-08 -8.6016E-15 3.6976E-12 1.6500E-13 -3.4082E-13 1.9524E-12 2.9114E-10 -6.1575E-13 7.9407E-11 -3.4082E-13 2.1870E-11 3.4674E-11 4.0126E-09 -8.4261E-13 2.2483E-10 1.9524E-12 3.4674E-11 1.1334E-10 1.6042E-08 -2.8470E-11 2.9129E-08 2.9114E-10 4.0126E-09 1.6042E-08 2.4977E-06 # lat0 lon0 xBary yBary zBary JD0 -9.942347 151.273746 0.991145 -0.006338 -0.037280 2457718.119169 # Heliocentric elements and errors Epoch: 2457710.5000 = 2016/11/18 Mean Anomaly: 10.10630 +/- 9.658 Argument of Peri: 271.81932 +/- 15.685 Long of Asc Node: 221.55105 +/- 0.037 Inclination: 10.43933 +/- 0.002 Eccentricity: 0.21789719 +/- 0.0208 Semi-Major Axis: 47.40183145 +/- 0.5673 Time of Perihelion: 2454364.0766 +/- 3197.4 Perihelion: 37.07310554 +/- 1.0795 Aphelion: 57.73055735 +/- 1.2024 Period (y) 326.3630 +/- 5.86 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -31.76411694 +/- 0.0128 Ecliptic Y 18.53317372 +/- 0.0070 Ecliptic Z -6.43717632 +/- 0.0026 Ecliptic XDOT -0.00171533 +/- 0.0001 Ecliptic YDOT -0.00257791 +/- 0.0001 Ecliptic ZDOT 0.00014582 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 37.33463395 +/- 0.0114 Geocenter to KBO 37.28311536 +/- 0.0148 # Hcoef: 9.58
The following table shows the complete astrometric record for 17BK231. 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 (17BK231) followed by the observatory code and reference code for the source of the astrometry.
2016 11 25.61838 09 59 08.39 +01 42 48.4 25.2i 17BK231 T09 C~7xTm 2016 11 25.62230 09 59 08.39 +01 42 48.6 25.5i 17BK231 T09 C~7xTm 2016 11 25.62614 09 59 08.40 +01 42 48.4 24.9i 17BK231 T09 C~7xTm 2016 11 25.62997 09 59 08.40 +01 42 48.4 24.9i 17BK231 T09 C~7xTm 2016 11 25.63407 09 59 08.40 +01 42 48.2 24.6i 17BK231 T09 C~7xTm 2016 11 25.63792 09 59 08.40 +01 42 48.2 25.1i 17BK231 T09 C~7xTm 2016 11 28.59145 09 59 09.12 +01 41 55.0 26.2r 17BK231 T09 C~7xTm 2016 11 28.59529 09 59 09.12 +01 41 54.8 26.1r 17BK231 T09 C~7xTm 2016 11 28.60679 09 59 09.14 +01 41 54.6 26.2r 17BK231 T09 C~7xTm 2016 12 25.52138 09 58 34.98 +01 38 01.5 26.0r 17BK231 T09 C~7xTm 2016 12 25.54359 09 58 34.94 +01 38 01.5 25.7r 17BK231 T09 C~7xTm 2016 12 25.57554 09 58 34.86 +01 38 01.2 25.4i 17BK231 T09 C~7xTm 2016 12 25.57937 09 58 34.85 +01 38 01.2 25.1i 17BK231 T09 C~7xTm 2016 12 25.61265 09 58 34.76 +01 38 01.0 25.1i 17BK231 T09 C~7xTm 2017 01 02.49315 09 58 11.90 +01 38 22.2 25.0i 17BK231 T09 C~7zpZ 2017 01 02.50080 09 58 11.87 +01 38 22.2 25.1i 17BK231 T09 C~7zpZ 2017 01 02.50463 09 58 11.85 +01 38 22.2 25.2i 17BK231 T09 C~7zpZ 2017 01 02.53399 09 58 11.76 +01 38 22.6 25.3i 17BK231 T09 C~7zpZ 2017 01 02.54679 09 58 11.73 +01 38 22.6 25.1i 17BK231 T09 C~7zpZ 2017 01 02.55218 09 58 11.71 +01 38 22.6 25.8i 17BK231 T09 C~7zpZ 2017 01 02.59458 09 58 11.57 +01 38 22.9 26.1g 17BK231 T09 C~7zpZ 2017 01 02.62292 09 58 11.45 +01 38 23.1 25.9g 17BK231 T09 C~7zpZ 2017 01 02.63237 09 58 11.44 +01 38 23.1 25.9g 17BK231 T09 C~7zpZ 2017 01 02.65137 09 58 11.37 +01 38 23.1 26.1g 17BK231 T09 C~7zpZ 2017 01 21.43628 09 56 58.33 +01 41 51.6 24.3z 17BK231 T09 C~7xTm 2017 01 21.48215 09 56 58.12 +01 41 52.6 24.5z 17BK231 T09 C~7xTm 2017 01 21.50822 09 56 58.01 +01 41 53.1 24.5z 17BK231 T09 C~7xTm 2017 01 21.53429 09 56 57.90 +01 41 53.3 24.5z 17BK231 T09 C~7xTm 2017 01 23.37134 09 56 49.63 +01 42 24.9 25.8r 17BK231 T09 C~7xTm 2017 01 23.39391 09 56 49.54 +01 42 25.4 24.9r 17BK231 T09 C~7xTm 2017 01 23.40775 09 56 49.47 +01 42 25.6 25.4r 17BK231 T09 C~7xTm 2017 01 23.41253 09 56 49.44 +01 42 25.9 26.1r 17BK231 T09 C~7xTm 2017 01 23.43372 09 56 49.35 +01 42 25.9 25.4r 17BK231 T09 C~7xTm 2017 01 23.45024 09 56 49.27 +01 42 26.7 25.5r 17BK231 T09 C~7xTm 2017 01 23.48266 09 56 49.12 +01 42 27.1 25.3i 17BK231 T09 C~7xTm 2017 01 23.51704 09 56 48.97 +01 42 27.6 24.5i 17BK231 T09 C~7xTm 2017 01 23.53190 09 56 48.92 +01 42 27.7 24.8i 17BK231 T09 C~7xTm 2017 01 23.55808 09 56 48.78 +01 42 28.4 24.6i 17BK231 T09 C~7xTm 2017 01 23.58838 09 56 48.63 +01 42 28.9 25.2i 17BK231 T09 C~7xTm 2017 01 30.45764 09 56 16.41 +01 44 43.2 24.7i 17BK231 T09 C~7xTm 2017 01 30.50184 09 56 16.19 +01 44 44.1 24.5z 17BK231 T09 C~7xTm 2017 01 30.52778 09 56 16.06 +01 44 44.8 24.5z 17BK231 T09 C~7xTm 2017 01 30.56478 09 56 15.87 +01 44 45.4 24.4z 17BK231 T09 C~7xTm 2017 01 30.59058 09 56 15.76 +01 44 46.1 24.6z 17BK231 T09 C~7xTm 2017 02 01.34247 09 56 07.29 +01 45 24.1 25.3g 17BK231 T09 C~7xTm 2017 02 01.41734 09 56 06.91 +01 45 26.1 25.8g 17BK231 T09 C~7xTm 2017 02 01.44607 09 56 06.71 +01 45 27.4 26.0g 17BK231 T09 C~7xTm
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 0.04 0.00 -0.09
2 0.0000 -0.07 -0.07 0.19 0.16
3 0.0000 0.14 0.09 0.05 0.09
4 0.0000 0.14 0.05 0.05 0.15
5 0.0000 0.21 0.08 -0.14 0.03
6 0.0001 0.21 0.03 -0.14 0.09
7 0.0081 28.89 -0.16 -46.22 -0.01
8 0.0082 28.96 -0.12 -46.41 -0.13
9 0.0082 29.31 0.16 -46.49 -0.03
10 0.0819 -369.34 -0.40 -443.67 0.08
11 0.0819 -369.90 -0.13 -443.88 0.18
12 0.0820 -370.92 0.04 -444.58 -0.08
13 0.0820 -371.06 0.04 -444.63 -0.08
14 0.0821 -372.26 0.09 -445.29 -0.28
15 0.1037 -700.88 0.05 -545.00 -0.11
16 0.1037 -701.30 -0.00 -545.16 -0.17
17 0.1037 -701.58 -0.10 -545.27 -0.23
18 0.1038 -702.98 -0.08 -545.36 0.04
19 0.1038 -703.41 0.12 -545.52 0.04
20 0.1039 -703.69 0.10 -545.62 0.01
21 0.1040 -705.76 0.09 -546.07 0.08
22 0.1041 -707.52 -0.29 -546.51 -0.00
23 0.1041 -707.66 0.03 -546.57 0.06
24 0.1041 -708.64 -0.03 -546.93 -0.07
25 0.1556 -1807.77 0.06 -733.51 -0.24
26 0.1557 -1811.07 -0.05 -733.67 -0.03
27 0.1558 -1812.79 0.05 -733.78 0.08
28 0.1558 -1814.41 0.25 -734.17 -0.10
29 0.1609 -1941.65 -0.05 -747.79 -0.14
30 0.1609 -1943.09 0.11 -747.79 0.02
31 0.1610 -1944.15 0.04 -747.97 -0.05
32 0.1610 -1944.67 -0.14 -747.85 0.11
33 0.1610 -1945.94 0.10 -748.32 -0.20
34 0.1611 -1947.34 -0.12 -747.99 0.26
35 0.1612 -1949.59 -0.06 -748.40 0.10
36 0.1613 -1951.87 0.12 -748.71 0.04
37 0.1613 -1952.61 0.44 -748.88 -0.01
38 0.1614 -1954.82 0.10 -748.96 0.11
39 0.1615 -1957.10 -0.02 -749.27 0.03
40 0.1803 -2456.76 0.12 -791.84 -0.06
41 0.1804 -2460.16 0.09 -792.15 -0.11
42 0.1805 -2462.23 0.01 -792.17 0.02
43 0.1806 -2465.11 -0.05 -792.60 -0.21
44 0.1806 -2466.90 0.13 -792.52 0.02
45 0.1854 -2599.20 0.25 -801.18 -0.08
46 0.1856 -2605.23 -0.00 -801.29 0.19
47 0.1857 -2608.50 -1.04 -801.12 0.51
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.
17BK231 quality flag:1 Type: SCATNEAR SCATNEAR SCATEXTD axisobj 47.219 51.633 45.791 ecceobj 0.215 0.331 0.189 incobj 10.441 10.438 10.443 qmin 36.306 33.438 36.561 qmax 58.654 71.271 55.483 amean 47.189 51.497 45.783 amin 46.743 50.637 45.359 amax 47.771 52.575 46.257 emean 0.210 0.331 0.189 emin 0.194 0.311 0.180 emax 0.229 0.356 0.199 imean 11.614 11.346 11.609 imin 10.833 10.121 11.115 imax 12.424 12.560 12.049 excite_mean 0.291 0.385 0.276 fracstop 1.000 1.000 1.000 cjmean 3.035 3.004 3.029 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 180.8 180.1 176.0 kozaiamp 180.0 180.0 179.9