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 Sun Dec 22 02:10:54 2024 # Orbit generated from Bernstein formalism # Fitting 49 observations of 50 # Arc: 2.45y # First observation: 2016/11/25 # Last observation: 2019/05/09 Preliminary a, adot, b, bdot, g, gdot: 0.000028 0.030679 0.000011 0.001869 0.027426 0.000000 # Chi-squared of fit: 24.45 DOF: 92 RMS: 0.12 # Min/Max residuals: -0.37 0.39 # Exact a, adot, b, bdot, g, gdot: 1.772899E-05 3.016398E-02 1.680694E-06 1.859755E-03 2.681668E-02 1.953360E-03 # Covariance matrix: 9.7940E-14 -8.1957E-13 8.4532E-15 -1.0266E-13 -1.5359E-13 -3.0621E-11 -8.1957E-13 3.9856E-11 4.2772E-13 4.3981E-12 1.4261E-11 1.3374E-09 8.4532E-15 4.2772E-13 4.6350E-14 1.3202E-14 2.0096E-13 1.2944E-11 -1.0266E-13 4.3981E-12 1.3202E-14 6.1830E-13 1.5365E-12 1.4935E-10 -1.5359E-13 1.4261E-11 2.0096E-13 1.5365E-12 5.4832E-12 4.6889E-10 -3.0621E-11 1.3374E-09 1.2944E-11 1.4935E-10 4.6889E-10 4.5363E-08 # 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: 7.57204 +/- 1.381 Argument of Peri: 275.92310 +/- 2.199 Long of Asc Node: 221.58921 +/- 0.004 Inclination: 10.43711 +/- 0.000 Eccentricity: 0.21278553 +/- 0.0024 Semi-Major Axis: 47.25506197 +/- 0.0723 Time of Perihelion: 2455214.8622 +/- 455.0 Perihelion: 37.19986854 +/- 0.1267 Aphelion: 57.31025540 +/- 0.1432 Period (y) 324.8484 +/- 0.75 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -31.77025460 +/- 0.0028 Ecliptic Y 18.53653201 +/- 0.0015 Ecliptic Z -6.43839682 +/- 0.0006 Ecliptic XDOT -0.00167881 +/- 0.0000 Ecliptic YDOT -0.00259715 +/- 0.0000 Ecliptic ZDOT 0.00015254 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 37.34173335 +/- 0.0025 Geocenter to KBO 37.29021736 +/- 0.0033 # 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 2018 01 17.545345 10 04 02.23 +01 09 55.2 17BK231 T09 C~83Eq 2019 05 09.256100 10 03 58.65 +01 29 07.6 17BK231 T09 C~83Eq 2019 05 09.378507 10 03 58.63 +01 29 09.9 17BK231 T09 C~83Eq
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 0.01 0.00 -0.12
2 0.0000 -0.07 -0.10 0.19 0.13
3 0.0000 0.14 0.07 0.05 0.06
4 0.0000 0.14 0.02 0.05 0.12
5 0.0000 0.21 0.05 -0.14 -0.00
6 0.0001 0.21 0.01 -0.14 0.06
7 0.0081 28.89 -0.17 -46.22 -0.04
8 0.0082 28.96 -0.13 -46.41 -0.16
9 0.0082 29.31 0.15 -46.49 -0.06
10 0.0819 -369.34 -0.37 -443.67 0.06
11 0.0819 -369.90 -0.10 -443.88 0.16
12 0.0820 -370.92 0.07 -444.58 -0.10
13 0.0820 -371.06 0.07 -444.63 -0.10
14 0.0821 -372.26 0.12 -445.29 -0.30
15 0.1037 -700.88 0.06 -545.00 -0.12
16 0.1037 -701.30 0.01 -545.16 -0.18
17 0.1037 -701.58 -0.08 -545.27 -0.23
18 0.1038 -702.98 -0.07 -545.36 0.04
19 0.1038 -703.41 0.13 -545.52 0.04
20 0.1039 -703.69 0.12 -545.62 0.00
21 0.1040 -705.76 0.10 -546.07 0.08
22 0.1041 -707.52 -0.28 -546.51 -0.01
23 0.1041 -707.66 0.04 -546.57 0.06
24 0.1041 -708.64 -0.02 -546.93 -0.07
25 0.1556 -1807.77 0.01 -733.51 -0.21
26 0.1557 -1811.07 -0.09 -733.67 0.01
27 0.1558 -1812.79 0.00 -733.78 0.11
28 0.1558 -1814.41 0.21 -734.17 -0.06
29 0.1609 -1941.65 -0.10 -747.79 -0.10
30 0.1609 -1943.09 0.06 -747.79 0.06
31 0.1610 -1944.15 -0.01 -747.97 -0.01
32 0.1610 -1944.67 -0.19 -747.85 0.15
33 0.1610 -1945.94 0.05 -748.32 -0.16
34 0.1611 -1947.34 -0.17 -747.99 0.30
35 0.1612 -1949.59 -0.11 -748.40 0.14
36 0.1613 -1951.87 0.07 -748.71 0.08
37 0.1613 -1952.61 0.39 -748.88 0.03
38 0.1614 -1954.82 0.05 -748.96 0.15
39 0.1615 -1957.10 -0.07 -749.27 0.07
40 0.1803 -2456.76 0.05 -791.84 0.01
41 0.1804 -2460.16 0.02 -792.15 -0.05
42 0.1805 -2462.23 -0.06 -792.17 0.08
43 0.1806 -2465.11 -0.11 -792.60 -0.14
44 0.1806 -2466.90 0.07 -792.52 0.08
45 0.1854 -2599.20 0.17 -801.18 -0.01
46 0.1856 -2605.23 -0.07 -801.29 0.26
47 0.1857 -2608.50 ( -1.11) -801.12 ( 0.58)
48 1.1442 4818.75 0.20 -310.17 -0.11
49 2.4494 4365.47 -0.03 751.05 -0.02
50 2.4497 4364.38 -0.06 753.10 0.05
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:2 Type: SCATEXTD SCATNEAR SCATEXTD axisobj 47.063 47.457 46.720 ecceobj 0.209 0.221 0.200 incobj 10.439 10.439 10.439 qmin 36.549 35.462 36.704 qmax 57.980 61.639 57.034 amean 47.017 47.800 46.686 amin 46.606 46.964 46.277 amax 47.533 48.726 47.191 emean 0.205 0.220 0.196 emin 0.190 0.184 0.182 emax 0.221 0.266 0.211 imean 11.651 11.692 11.653 imin 11.044 10.796 11.057 imax 12.359 12.555 12.304 excite_mean 0.288 0.299 0.281 fracstop 1.000 1.000 1.000 cjmean 3.036 3.036 3.036 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 177.4 176.7 176.9 kozaiamp 180.0 180.0 180.0