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: 17BQ263 # Created Sun Oct 19 01:11:42 2025 # Orbit generated from Bernstein formalism # Fitting 57 observations of 57 # Arc: 2.01y # First observation: 2016/01/15 # Last observation: 2018/01/17 Preliminary a, adot, b, bdot, g, gdot: 0.000025 0.023492 -0.000032 -0.011685 0.025921 0.000000 # Chi-squared of fit: 64.51 DOF: 108 RMS: 0.19 # Min/Max residuals: -0.53 0.48 # Exact a, adot, b, bdot, g, gdot: 1.360847E-05 2.350908E-02 -8.995248E-06 -1.169665E-02 2.593188E-02 1.298744E-03 # Covariance matrix: 2.6734E-13 -3.5334E-13 -4.4175E-14 1.0832E-13 -1.3479E-13 -4.5064E-12 -3.5334E-13 9.3105E-13 1.6527E-13 -3.9717E-13 7.2016E-13 1.6538E-11 -4.4175E-14 1.6527E-13 2.1512E-13 -2.1948E-13 1.4688E-13 3.3823E-12 1.0832E-13 -3.9717E-13 -2.1948E-13 3.1822E-13 -3.4871E-13 -8.1361E-12 -1.3479E-13 7.2016E-13 1.4688E-13 -3.4871E-13 7.5402E-13 1.4527E-11 -4.5064E-12 1.6538E-11 3.3823E-12 -8.1361E-12 1.4527E-11 3.3877E-10 # lat0 lon0 xBary yBary zBary JD0 -9.089893 151.179444 0.587964 -0.124375 -0.778480 2457403.149619 # Heliocentric elements and errors Epoch: 2457400.5000 = 2016/01/13 Mean Anomaly: 47.52487 +/- 0.495 Argument of Peri: 147.92155 +/- 0.574 Long of Asc Node: 313.08433 +/- 0.001 Inclination: 27.87901 +/- 0.001 Eccentricity: 0.04423290 +/- 0.0006 Semi-Major Axis: 40.51282525 +/- 0.0027 Time of Perihelion: 2444966.6479 +/- 129.6 Perihelion: 38.72082547 +/- 0.0230 Aphelion: 42.30482502 +/- 0.0230 Period (y) 257.8677 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -33.77289333 +/- 0.0011 Ecliptic Y 19.24951093 +/- 0.0006 Ecliptic Z -6.09261988 +/- 0.0002 Ecliptic XDOT -0.00114492 +/- 0.0000 Ecliptic YDOT -0.00221033 +/- 0.0000 Ecliptic ZDOT -0.00124105 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 39.34808778 +/- 0.0010 Geocenter to KBO 38.56257002 +/- 0.0013 # Hcoef: 9.72
The following table shows the complete astrometric record for 17BQ263. 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 (17BQ263) followed by the observatory code and reference code for the source of the astrometry.
2016 01 15.64883 09 59 58.89 +02 32 41.2 25.3z 17BQ263 T09 C~94uC 2016 01 15.65269 09 59 58.88 +02 32 41.0 25.5z 17BQ263 T09 C~94uC 2016 01 15.65653 09 59 58.85 +02 32 41.0 24.8z 17BQ263 T09 C~94uC 2016 01 15.66041 09 59 58.80 +02 32 40.7 25.2z 17BQ263 T09 C~94uC 2016 01 15.66427 09 59 58.76 +02 32 40.7 25.9z 17BQ263 T09 C~94uC 2017 01 21.44099 10 03 37.92 +01 27 37.4 25.3z 17BQ263 T09 C~94uC 2017 01 21.48580 10 03 37.73 +01 27 37.9 25.8z 17BQ263 T09 C~94uC 2017 01 21.51187 10 03 37.60 +01 27 37.9 25.4z 17BQ263 T09 C~94uC 2017 01 21.53790 10 03 37.49 +01 27 38.3 24.9z 17BQ263 T09 C~94uC 2017 01 21.56003 10 03 37.40 +01 27 38.6 25.1z 17BQ263 T09 C~94uC 2017 01 23.36273 10 03 29.21 +01 27 56.7 25.7r 17BQ263 T09 C~94uC 2017 01 23.36852 10 03 29.18 +01 27 56.7 25.7r 17BQ263 T09 C~94uC 2017 01 23.39642 10 03 29.05 +01 27 57.6 26.3r 17BQ263 T09 C~94uC 2017 01 23.41024 10 03 28.99 +01 27 57.3 26.1r 17BQ263 T09 C~94uC 2017 01 23.45235 10 03 28.80 +01 27 57.6 26.4r 17BQ263 T09 C~94uC 2017 01 23.52068 10 03 28.46 +01 27 58.3 26.1i 17BQ263 T09 C~94uC 2017 01 23.56169 10 03 28.27 +01 27 58.8 26.4i 17BQ263 T09 C~94uC 2017 01 23.59193 10 03 28.12 +01 27 59.3 25.9i 17BQ263 T09 C~94uC 2017 02 23.46966 10 00 53.25 +01 36 52.8 25.7r 17BQ263 T09 C~94uC 2017 02 23.47280 10 00 53.24 +01 36 53.0 25.7r 17BQ263 T09 C~94uC 2017 02 23.48645 10 00 53.19 +01 36 53.5 25.5r 17BQ263 T09 C~94uC 2017 02 23.50008 10 00 53.10 +01 36 53.5 26.2r 17BQ263 T09 C~94uC 2017 03 04.27055 10 00 08.78 +01 40 17.9 24.7z 17BQ263 T09 C~94uC 2017 03 04.29603 10 00 08.68 +01 40 18.4 24.5z 17BQ263 T09 C~94uC 2017 03 04.29967 10 00 08.64 +01 40 18.5 24.6z 17BQ263 T09 C~94uC 2017 03 04.32520 10 00 08.52 +01 40 19.6 24.6z 17BQ263 T09 C~94uC 2017 03 04.33285 10 00 08.49 +01 40 19.6 25.8z 17BQ263 T09 C~94uC 2017 03 04.44130 10 00 07.94 +01 40 21.9 25.2i 17BQ263 T09 C~94uC 2017 03 04.44514 10 00 07.92 +01 40 22.2 25.4i 17BQ263 T09 C~94uC 2017 03 04.45958 10 00 07.85 +01 40 22.4 25.2i 17BQ263 T09 C~94uC 2017 03 04.46328 10 00 07.81 +01 40 22.7 25.2i 17BQ263 T09 C~94uC 2017 03 04.47782 10 00 07.74 +01 40 23.1 25.7i 17BQ263 T09 C~94uC 2017 03 04.49952 10 00 07.66 +01 40 23.4 25.3i 17BQ263 T09 C~94uC 2017 03 04.50666 10 00 07.61 +01 40 23.4 25.4i 17BQ263 T09 C~94uC 2017 03 06.50700 09 59 57.76 +01 41 12.3 26.5r 17BQ263 T09 C~94uC 2017 03 06.51016 09 59 57.76 +01 41 12.1 26.8r 17BQ263 T09 C~94uC 2017 03 06.51829 09 59 57.71 +01 41 12.4 25.8r 17BQ263 T09 C~94uC 2017 03 06.52393 09 59 57.69 +01 41 12.4 25.8r 17BQ263 T09 C~94uD 2017 03 06.53219 09 59 57.63 +01 41 12.9 26.2r 17BQ263 T09 C~94uD 2017 03 23.23750 09 58 41.93 +01 48 03.8 25.2i 17BQ263 T09 C~94uD 2017 03 23.25214 09 58 41.86 +01 48 04.3 25.7i 17BQ263 T09 C~94uD 2017 03 23.25932 09 58 41.81 +01 48 04.6 25.4i 17BQ263 T09 C~94uD 2017 03 23.27391 09 58 41.77 +01 48 04.4 25.5i 17BQ263 T09 C~94uD 2017 03 30.25151 09 58 14.59 +01 50 53.1 25.4i 17BQ263 T09 C~94uD 2017 03 30.26317 09 58 14.55 +01 50 52.9 24.8i 17BQ263 T09 C~94uD 2017 03 30.26700 09 58 14.54 +01 50 53.1 24.4i 17BQ263 T09 C~94uD 2017 03 30.27083 09 58 14.53 +01 50 53.3 25.3i 17BQ263 T09 C~94uD 2017 03 30.27466 09 58 14.53 +01 50 53.3 24.7i 17BQ263 T09 C~94uD 2017 03 30.27849 09 58 14.51 +01 50 53.3 24.8i 17BQ263 T09 C~94uD 2017 03 30.28622 09 58 14.47 +01 50 53.3 25.2i 17BQ263 T09 C~94uD 2018 01 17.46122 10 08 02.95 +00 21 12.3 25.7i 17BQ263 T09 C~94uD 2018 01 17.48332 10 08 02.85 +00 21 12.8 25.3i 17BQ263 T09 C~94uD 2018 01 17.51028 10 08 02.72 +00 21 12.8 25.5i 17BQ263 T09 C~94uD 2018 01 17.51296 10 08 02.72 +00 21 12.8 25.3i 17BQ263 T09 C~94uD 2018 01 17.53998 10 08 02.59 +00 21 13.3 25.5i 17BQ263 T09 C~94uD 2018 01 17.57223 10 08 02.47 +00 21 13.3 25.8i 17BQ263 T09 C~94uD 2018 01 17.59901 10 08 02.33 +00 21 13.3 25.3i 17BQ263 T09 C~94uD
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 0.15 0.00 0.38
2 0.0000 -0.07 0.32 -0.24 0.21
3 0.0000 -0.49 0.14 -0.40 0.11
4 0.0000 -1.09 -0.21 -0.94 -0.37
5 0.0000 -1.65 -0.53 -1.15 -0.52
6 1.0179 4440.64 -0.23 -2512.31 -0.07
7 1.0180 4437.79 -0.03 -2512.84 0.07
8 1.0181 4435.96 -0.09 -2513.52 -0.22
9 1.0182 4434.28 -0.01 -2513.72 -0.03
10 1.0182 4432.91 0.13 -2513.91 0.12
11 1.0232 4311.45 0.10 -2539.85 -0.02
12 1.0232 4311.03 0.07 -2540.01 -0.09
13 1.0233 4308.89 -0.14 -2539.84 0.48
14 1.0233 4308.15 0.08 -2540.44 0.08
15 1.0234 4305.37 0.23 -2541.15 -0.02
16 1.0236 4300.35 -0.04 -2542.28 -0.15
17 1.0237 4297.50 -0.03 -2542.81 -0.08
18 1.0238 4295.22 -0.21 -2543.12 0.04
19 1.1083 1932.15 -0.11 -2853.90 -0.22
20 1.1083 1931.94 -0.06 -2853.77 -0.07
21 1.1084 1931.07 0.17 -2853.56 0.22
22 1.1084 1929.80 0.01 -2854.03 -0.16
23 1.1324 1235.61 -0.06 -2894.32 -0.10
24 1.1325 1234.03 0.37 -2894.38 -0.06
25 1.1325 1233.44 0.06 -2894.49 -0.17
26 1.1326 1231.37 0.01 -2894.09 0.33
27 1.1326 1230.94 0.20 -2894.25 0.21
28 1.1329 1222.41 0.25 -2894.97 -0.10
29 1.1329 1222.03 0.17 -2894.79 0.09
30 1.1330 1220.97 0.26 -2894.97 -0.03
31 1.1330 1220.31 -0.12 -2894.90 0.05
32 1.1330 1219.18 -0.09 -2894.89 0.12
33 1.1331 1217.95 0.39 -2895.03 0.06
34 1.1331 1217.25 0.25 -2895.29 -0.17
35 1.1386 1061.76 -0.21 -2900.98 0.27
36 1.1386 1061.83 0.11 -2901.17 0.09
37 1.1386 1061.03 -0.06 -2901.15 0.14
38 1.1386 1060.74 0.09 -2901.25 0.05
39 1.1386 1059.73 -0.28 -2901.10 0.23
40 1.1844 -147.42 0.09 -2911.80 0.02
41 1.1844 -148.58 -0.08 -2911.70 0.10
42 1.1844 -149.38 -0.41 -2911.68 0.12
43 1.1845 -149.88 0.08 -2912.07 -0.30
44 1.2036 -590.66 -0.37 -2896.02 0.21
45 1.2036 -591.15 -0.16 -2896.41 -0.22
46 1.2036 -591.37 -0.13 -2896.28 -0.09
47 1.2036 -591.58 -0.11 -2896.14 0.03
48 1.2036 -591.58 0.12 -2896.14 0.02
49 1.2036 -591.86 0.07 -2896.25 -0.09
50 1.2037 -592.42 -0.02 -2896.46 -0.32
51 2.0063 9565.53 0.23 -4860.36 -0.19
52 2.0064 9563.95 0.03 -4860.41 0.12
53 2.0065 9562.12 -0.11 -4861.09 -0.11
54 2.0065 9562.12 0.06 -4861.09 -0.07
55 2.0065 9560.11 -0.25 -4861.31 0.17
56 2.0066 9558.42 0.09 -4861.94 0.08
57 2.0067 9556.45 -0.20 -4862.67 -0.21
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.
17BQ263 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 40.323 40.334 40.312 ecceobj 0.044 0.046 0.043 incobj 27.937 27.937 27.937 qmin 37.990 37.939 38.042 qmax 42.841 42.878 42.788 amean 40.342 40.353 40.331 amin 40.045 40.040 40.026 amax 40.648 40.661 40.639 emean 0.043 0.044 0.042 emin 0.033 0.034 0.032 emax 0.054 0.055 0.053 imean 29.279 29.278 29.279 imin 28.930 28.922 28.924 imax 29.639 29.638 29.635 excite_mean 0.491 0.491 0.491 fracstop 1.000 1.000 1.000 cjmean 2.764 2.764 2.764 libcent 0 -180.0 180.1 -180.0 libamp 0 -180.0 142.9 -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 183.7 183.8 184.1 kozaiamp 180.0 180.0 179.9