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 Apr 28 01:11:03 2025 # Orbit generated from Bernstein formalism # Fitting 53 observations of 53 # Arc: 4.05y # First observation: 2015/03/18 # Last observation: 2019/04/05 Preliminary a, adot, b, bdot, g, gdot: -0.000283 0.013690 -0.000045 0.001990 0.017373 0.000000 # Chi-squared of fit: 534.50 DOF: 100 RMS: 0.56 # Min/Max residuals: -5.41 0.56 # Exact a, adot, b, bdot, g, gdot: 1.209486E-05 1.325540E-02 1.291484E-06 1.931913E-03 1.728960E-02 -6.434215E-03 # Covariance matrix: 2.0458E-13 -1.3777E-13 1.0571E-14 -1.3691E-14 -7.6952E-14 -1.5444E-12 -1.3777E-13 1.7757E-13 -1.7241E-14 2.1889E-14 1.0015E-14 2.4728E-12 1.0571E-14 -1.7241E-14 1.1629E-13 -4.1232E-14 -9.1886E-16 -2.6590E-13 -1.3691E-14 2.1889E-14 -4.1232E-14 2.0250E-14 1.8229E-15 3.3777E-13 -7.6952E-14 1.0015E-14 -9.1886E-16 1.8229E-15 1.7252E-13 2.0044E-13 -1.5444E-12 2.4728E-12 -2.6590E-13 3.3777E-13 2.0044E-13 3.8156E-11 # lat0 lon0 xBary yBary zBary JD0 -8.530561 149.942453 -0.455372 -0.130617 -0.871720 2457099.891538 # Heliocentric elements and errors Epoch: 2457090.5000 = 2015/03/09 Mean Anomaly: 308.05812 +/- 0.039 Argument of Peri: 57.14427 +/- 0.012 Long of Asc Node: 195.21407 +/- 0.002 Inclination: 11.83485 +/- 0.000 Eccentricity: 0.43498163 +/- 0.0004 Semi-Major Axis: 65.55568002 +/- 0.0266 Time of Perihelion: 2485062.8605 +/- 12.2 Perihelion: 37.04016333 +/- 0.0306 Aphelion: 94.07119671 +/- 0.0466 Period (y) 530.7912 +/- 0.32 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -50.50096930 +/- 0.0012 Ecliptic Y 28.69611270 +/- 0.0007 Ecliptic Z -8.57946440 +/- 0.0002 Ecliptic XDOT -0.00022193 +/- 0.0000 Ecliptic YDOT -0.00230447 +/- 0.0000 Ecliptic ZDOT 0.00045376 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 58.71475107 +/- 0.0011 Geocenter to KBO 57.83823571 +/- 0.0014 # Hcoef: 7.50
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 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 0.01 0.00 0.10
2 0.0001 -1.82 0.08 0.18 0.09
3 0.0002 -2.94 -0.17 0.20 0.02
4 0.0053 -91.78 0.14 10.17 -0.04
5 0.0054 -92.87 -0.16 10.09 -0.21
6 0.0054 -93.26 0.16 10.26 -0.10
7 0.0055 -94.10 0.01 10.38 -0.06
8 1.8482 8475.88 0.02 754.91 -0.04
9 1.8483 8473.67 -0.04 754.84 0.05
10 1.8484 8471.38 0.14 754.53 -0.07
11 1.8485 8470.36 0.17 754.69 0.16
12 1.8534 8385.85 0.01 748.73 -0.14
13 1.8535 8384.79 0.15 748.98 0.19
14 1.8535 8384.23 0.00 748.77 0.01
15 1.8536 8383.81 0.25 748.62 -0.10
16 1.8536 8382.90 0.09 748.92 0.25
17 1.8537 8381.03 0.04 748.34 -0.21
18 1.8539 8378.36 0.02 748.63 0.27
19 1.8540 8376.46 0.10 748.14 -0.08
20 1.8541 8375.16 0.26 748.19 0.07
21 1.8727 8039.72 0.40 731.21 0.14
22 1.8729 8037.05 0.01 731.07 0.10
23 1.8730 8034.97 0.22 730.63 -0.24
24 1.8732 8031.46 -0.04 731.04 0.31
25 1.9328 6859.64 0.15 724.73 0.21
26 1.9329 6858.23 0.18 724.64 0.09
27 1.9329 6856.62 0.00 724.69 0.10
28 1.9330 6855.46 0.08 724.79 0.18
29 1.9382 6744.46 -5.41 726.67 -1.01
30 1.9386 6741.80 0.18 727.82 -0.07
31 1.9387 6741.23 0.38 727.61 -0.30
32 1.9628 6260.13 0.04 749.58 -0.01
33 1.9628 6259.25 0.56 749.79 0.12
34 1.9629 6257.67 0.37 749.74 -0.00
35 1.9632 6251.46 0.31 750.11 0.05
36 2.0123 5341.83 0.48 830.39 -0.01
37 2.0125 5339.16 0.25 830.69 0.00
38 2.0126 5337.17 0.50 831.34 0.39
39 3.8877 13490.79 -0.16 1548.44 0.20
40 3.8877 13490.22 0.14 1548.23 0.01
41 3.8878 13489.34 -0.02 1548.01 -0.19
42 3.8878 13488.64 -0.01 1548.18 -0.00
43 3.8878 13488.50 -0.00 1548.12 -0.05
44 3.8878 13488.07 0.01 1547.97 -0.20
45 3.8879 13487.34 -0.00 1548.23 0.08
46 3.9586 12058.44 -0.07 1571.59 -0.10
47 3.9587 12057.94 0.00 1571.62 -0.10
48 3.9588 12056.36 -0.04 1572.00 0.20
49 3.9588 12056.29 0.04 1571.76 -0.04
50 4.0492 10440.39 -0.01 1744.33 -0.04
51 4.0492 10439.72 0.22 1744.40 -0.12
52 4.0492 10439.30 -0.12 1744.68 0.13
53 4.0492 10439.16 0.08 1744.62 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 64.778 64.851 64.705 ecceobj 0.432 0.433 0.431 incobj 11.882 11.882 11.882 qmin 35.629 35.890 35.888 qmax 97.055 96.454 95.759 amean 65.319 65.376 64.980 amin 64.304 64.493 64.053 amax 66.627 66.533 66.216 emean 0.438 0.435 0.433 emin 0.423 0.422 0.420 emax 0.457 0.450 0.447 imean 11.633 12.148 11.793 imin 10.373 11.296 11.025 imax 12.660 12.962 12.661 excite_mean 0.482 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 176.1 189.3 174.0 kozaiamp 180.0 180.0 180.0