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: 17BK235 # Created Mon Jul 7 01:11:23 2025 # Orbit generated from Bernstein formalism # Fitting 60 observations of 60 # Arc: 4.22y # First observation: 2015/01/16 # Last observation: 2019/04/05 Preliminary a, adot, b, bdot, g, gdot: -0.000137 0.013645 -0.000031 0.002013 0.017419 0.000000 # Chi-squared of fit: 540.98 DOF: 114 RMS: 0.53 # Min/Max residuals: -5.41 0.54 # Exact a, adot, b, bdot, g, gdot: 1.315592E-05 1.331559E-02 2.451290E-06 1.956887E-03 1.724844E-02 -6.179968E-03 # Covariance matrix: 1.1819E-13 -5.7137E-14 4.3580E-15 -6.0291E-15 4.3241E-14 -7.2737E-13 -5.7137E-14 8.3181E-14 -7.7257E-15 1.2644E-14 3.6163E-14 1.5028E-12 4.3580E-15 -7.7257E-15 8.0194E-14 -2.7302E-14 -1.6617E-15 -1.6588E-13 -6.0291E-15 1.2644E-14 -2.7302E-14 1.4335E-14 5.3112E-15 2.6851E-13 4.3241E-14 3.6163E-14 -1.6617E-15 5.3112E-15 1.5731E-13 6.0606E-13 -7.2737E-13 1.5028E-12 -1.6588E-13 2.6851E-13 6.0606E-13 3.1945E-11 # lat0 lon0 xBary yBary zBary JD0 -8.537836 150.821338 0.564242 -0.119126 -0.794592 2457039.056768 # Heliocentric elements and errors Epoch: 2457030.5000 = 2015/01/08 Mean Anomaly: 307.86252 +/- 0.037 Argument of Peri: 57.17351 +/- 0.011 Long of Asc Node: 195.20322 +/- 0.002 Inclination: 11.83704 +/- 0.000 Eccentricity: 0.43440564 +/- 0.0004 Semi-Major Axis: 65.51533640 +/- 0.0256 Time of Perihelion: 2485082.2794 +/- 11.4 Perihelion: 37.05510451 +/- 0.0285 Aphelion: 93.97556828 +/- 0.0442 Period (y) 530.3013 +/- 0.31 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -50.48803216 +/- 0.0011 Ecliptic Y 28.83666525 +/- 0.0006 Ecliptic Z -8.60717912 +/- 0.0002 Ecliptic XDOT -0.00022761 +/- 0.0000 Ecliptic YDOT -0.00230118 +/- 0.0000 Ecliptic ZDOT 0.00045291 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 58.77651050 +/- 0.0010 Geocenter to KBO 57.97624540 +/- 0.0013 # Hcoef: 7.49
The following table shows the complete astrometric record for 17BK235. 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 (17BK235) followed by the observatory code and reference code for the source of the astrometry.
2015 01 16.55599 09 59 25.39 +03 11 07.9 24.6z 17BK235 T09 C~8vIb 2015 01 16.59163 09 59 25.30 +03 11 08.4 24.8z 17BK235 T09 C~8vIb 2015 01 16.62595 09 59 25.20 +03 11 08.6 24.3z 17BK235 T09 C~8vIb 2015 01 16.64412 09 59 25.14 +03 11 09.1 24.9z 17BK235 T09 C~8vIb 2015 01 21.60268 09 59 10.76 +03 12 08.5 24.7i 17BK235 T09 C~8vIb 2015 01 21.62851 09 59 10.67 +03 12 08.8 25.5i 17BK235 T09 C~8vIb 2015 01 21.65451 09 59 10.62 +03 12 09.0 25.1i 17BK235 T09 C~8vIb 2015 03 18.39076 09 56 09.98 +03 29 36.3 25.5r 17BK235 T09 C~8eW4 2015 03 18.42974 09 56 09.87 +03 29 37.1 25.4r 17BK235 T09 C~8eW4 2015 03 18.44789 09 56 09.80 +03 29 37.5 24.9r 17BK235 T09 C~8eW4 2015 03 20.33757 09 56 04.46 +03 30 17.5 25.3i 17BK235 T09 C~8eW4 2015 03 20.35412 09 56 04.39 +03 30 17.8 25.0i 17BK235 T09 C~8eW4 2015 03 20.36873 09 56 04.37 +03 30 18.1 24.9i 17BK235 T09 C~8eW4 2015 03 20.38334 09 56 04.32 +03 30 18.5 24.6i 17BK235 T09 C~8eW4 2017 01 21.43262 10 05 18.09 +02 52 33.2 24.4z 17BK235 T09 C~7zpf 2017 01 21.47848 10 05 17.95 +02 52 33.9 24.5z 17BK235 T09 C~7zpf 2017 01 21.53071 10 05 17.80 +02 52 34.4 25.0z 17BK235 T09 C~7zpf 2017 01 21.55293 10 05 17.74 +02 52 34.9 25.1z 17BK235 T09 C~7zpf 2017 01 23.35766 10 05 12.32 +02 52 58.6 25.5r 17BK235 T09 C~7zpf 2017 01 23.38262 10 05 12.26 +02 52 59.2 25.7r 17BK235 T09 C~7zpf 2017 01 23.39135 10 05 12.22 +02 52 59.2 25.3r 17BK235 T09 C~7zpf 2017 01 23.40520 10 05 12.19 +02 52 59.2 24.9r 17BK235 T09 C~7zpf 2017 01 23.42098 10 05 12.14 +02 52 59.8 24.9r 17BK235 T09 C~7zpg 2017 01 23.45863 10 05 12.01 +02 52 59.9 25.5r 17BK235 T09 C~7zpg 2017 01 23.51343 10 05 11.85 +02 53 01.1 24.9i 17BK235 T09 C~7zpg 2017 01 23.55452 10 05 11.72 +02 53 01.3 24.7i 17BK235 T09 C~7zpg 2017 01 23.58486 10 05 11.64 +02 53 01.8 25.0i 17BK235 T09 C~7zpg 2017 01 30.40987 10 04 50.28 +02 54 42.1 24.5i 17BK235 T09 C~7zpg 2017 01 30.45397 10 04 50.11 +02 54 42.9 25.0i 17BK235 T09 C~7zpg 2017 01 30.49820 10 04 49.97 +02 54 43.2 24.7z 17BK235 T09 C~7zpg 2017 01 30.56119 10 04 49.76 +02 54 44.8 24.9z 17BK235 T09 C~7zpg 2017 02 21.34603 10 03 36.34 +03 01 24.8 24.5z 17BK235 T09 C~7zpg 2017 02 21.37159 10 03 36.25 +03 01 25.2 24.9z 17BK235 T09 C~7zpg 2017 02 21.39722 10 03 36.15 +03 01 25.8 24.7z 17BK235 T09 C~7zpg 2017 02 21.41923 10 03 36.08 +03 01 26.3 25.1z 17BK235 T09 C~7zpg 2017 02 23.33107 10 03 29.18 +03 02 06.5 25.6g 17BK235 T09 C~81Bn 2017 02 23.47842 10 03 29.04 +03 02 08.5 25.9r 17BK235 T09 C~81Bn 2017 02 23.49203 10 03 29.00 +03 02 08.5 25.8r 17BK235 T09 C~81Bn 2017 03 04.28899 10 02 59.41 +03 05 15.7 24.7z 17BK235 T09 C~7zpg 2017 03 04.31448 10 02 59.36 +03 05 16.2 24.8z 17BK235 T09 C~7zpg 2017 03 04.34002 10 02 59.26 +03 05 16.7 24.7z 17BK235 T09 C~7zpg 2017 03 04.45244 10 02 58.88 +03 05 19.2 25.0i 17BK235 T09 C~7zpg 2017 03 22.38749 10 02 03.81 +03 11 49.4 24.4z 17BK235 T09 C~7zpg 2017 03 22.43886 10 02 03.65 +03 11 50.6 24.8z 17BK235 T09 C~7zpg 2017 03 22.48627 10 02 03.54 +03 11 51.9 24.6z 17BK235 T09 C~7zpg 2019 02 05.36641 10 10 49.38 +02 35 57.5 24.9i 17BK235 T09 C~7zpg 2019 02 05.38256 10 10 49.34 +02 35 57.5 24.7i 17BK235 T09 C~7zpg 2019 02 05.39592 10 10 49.28 +02 35 57.6 24.7i 17BK235 T09 C~7zpg 2019 02 05.40928 10 10 49.24 +02 35 58.0 24.9i 17BK235 T09 C~7zpg 2019 02 05.41196 10 10 49.23 +02 35 58.0 24.3i 17BK235 T09 C~7zpg 2019 02 05.42003 10 10 49.20 +02 35 58.0 24.6i 17BK235 T09 C~7zpg 2019 02 05.43354 10 10 49.16 +02 35 58.5 24.4i 17BK235 T09 C~7zpg 2019 03 03.28745 10 09 20.65 +02 44 36.0 24.4z 17BK235 T09 C~7zpg 2019 03 03.29758 10 09 20.62 +02 44 36.2 24.6z 17BK235 T09 C~7zpg 2019 03 03.32504 10 09 20.53 +02 44 37.1 24.5z 17BK235 T09 C~7zpg 2019 03 03.32771 10 09 20.52 +02 44 36.9 24.6z 17BK235 T09 C~7zpg 2019 04 05.34328 10 07 43.70 +02 56 39.0 25.3r 17BK235 T09 C~7zpg 2019 04 05.36539 10 07 43.66 +02 56 39.3 26.0r 17BK235 T09 C~7zpg 2019 04 05.36748 10 07 43.64 +02 56 39.7 25.4r 17BK235 T09 C~7zpg 2019 04 05.37599 10 07 43.63 +02 56 39.7 25.3r 17BK235 T09 C~7zpg
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 -0.20 0.00 -0.14
2 0.0001 -1.44 -0.06 -0.00 0.03
3 0.0002 -2.91 -0.02 -0.33 -0.15
4 0.0002 -3.93 -0.24 -0.18 0.08
5 0.0138 -226.51 -0.18 -19.39 0.06
6 0.0139 -227.87 -0.33 -19.58 -0.03
7 0.0140 -228.65 0.12 -19.65 -0.00
8 0.1666 -3129.22 0.10 22.63 0.12
9 0.1667 -3131.04 0.17 22.81 0.11
10 0.1667 -3132.16 -0.07 22.82 0.04
11 0.1719 -3221.05 0.24 32.59 -0.02
12 0.1719 -3222.13 -0.06 32.51 -0.19
13 0.1720 -3222.52 0.25 32.68 -0.08
14 0.1720 -3223.36 0.10 32.80 -0.04
15 2.0147 5341.60 0.07 796.43 -0.04
16 2.0148 5339.38 0.01 796.36 0.05
17 2.0150 5337.10 0.19 796.04 -0.07
18 2.0150 5336.09 0.22 796.20 0.17
19 2.0200 5251.67 0.05 790.05 -0.14
20 2.0201 5250.61 0.19 790.30 0.19
21 2.0201 5250.05 0.05 790.09 0.01
22 2.0201 5249.63 0.29 789.94 -0.10
23 2.0202 5248.72 0.14 790.24 0.25
24 2.0203 5246.86 0.09 789.65 -0.21
25 2.0204 5244.19 0.06 789.94 0.27
26 2.0205 5242.29 0.15 789.45 -0.08
27 2.0206 5241.00 0.31 789.50 0.07
28 2.0393 4905.92 0.44 771.77 0.14
29 2.0394 4903.25 0.04 771.63 0.10
30 2.0395 4901.18 0.25 771.18 -0.24
31 2.0397 4897.67 -0.01 771.58 0.31
32 2.0994 3726.88 0.15 762.68 0.21
33 2.0994 3725.47 0.18 762.59 0.09
34 2.0995 3723.86 -0.00 762.63 0.10
35 2.0996 3722.70 0.08 762.73 0.18
36 2.1048 3611.78 -5.41 764.36 -1.02
37 2.1052 3609.12 0.18 765.50 -0.07
38 2.1052 3608.55 0.38 765.29 -0.30
39 2.1293 3127.75 0.02 786.19 -0.01
40 2.1294 3126.87 0.54 786.40 0.12
41 2.1295 3125.29 0.35 786.34 -0.00
42 2.1298 3119.09 0.29 786.70 0.05
43 2.1789 2209.84 0.43 864.94 -0.01
44 2.1790 2207.18 0.21 865.23 0.01
45 2.1791 2205.18 0.45 865.88 0.40
46 4.0542 10347.76 -0.13 1600.38 0.20
47 4.0543 10347.19 0.17 1600.17 0.01
48 4.0543 10346.31 0.01 1599.95 -0.19
49 4.0544 10345.61 0.03 1600.11 -0.01
50 4.0544 10345.47 0.03 1600.06 -0.05
51 4.0544 10345.05 0.04 1599.90 -0.20
52 4.0544 10344.31 0.03 1600.16 0.08
53 4.1252 8917.71 -0.10 1620.42 -0.10
54 4.1252 8917.22 -0.02 1620.45 -0.10
55 4.1253 8915.64 -0.07 1620.82 0.20
56 4.1253 8915.57 0.01 1620.58 -0.05
57 4.2157 7301.58 -0.10 1789.56 -0.04
58 4.2158 7300.91 0.13 1789.63 -0.12
59 4.2158 7300.49 -0.21 1789.90 0.13
60 4.2158 7300.35 -0.01 1789.85 0.02
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.
17BK235 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 64.763 64.834 64.693 ecceobj 0.432 0.433 0.430 incobj 11.882 11.882 11.882 qmin 35.720 35.882 35.870 qmax 96.895 96.539 95.602 amean 65.377 65.466 64.963 amin 64.355 64.449 64.064 amax 66.598 66.655 66.149 emean 0.438 0.436 0.433 emin 0.422 0.421 0.419 emax 0.455 0.451 0.447 imean 11.721 12.117 11.821 imin 10.650 11.205 10.960 imax 12.678 13.030 12.702 excite_mean 0.483 0.484 0.479 fracstop 1.000 1.000 1.000 cjmean 3.055 3.054 3.055 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 174.2 168.9 172.7 kozaiamp 180.0 180.0 180.0