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: 17BF226 # Created Sun Oct 19 01:11:39 2025 # Orbit generated from Bernstein formalism # Fitting 44 observations of 45 # Arc: 2.28y # First observation: 2016/12/23 # Last observation: 2019/04/05 Preliminary a, adot, b, bdot, g, gdot: 0.000014 0.018366 0.000005 -0.000343 0.022019 0.000000 # Chi-squared of fit: 34.25 DOF: 82 RMS: 0.16 # Min/Max residuals: -0.52 0.42 # Exact a, adot, b, bdot, g, gdot: 1.313133E-05 1.814560E-02 1.974143E-06 -3.348400E-04 2.178688E-02 -1.666977E-03 # Covariance matrix: 1.3474E-13 1.1343E-13 1.0352E-14 -9.6544E-15 1.8552E-13 5.0568E-12 1.1343E-13 7.6143E-13 2.5959E-14 -5.7208E-14 4.4196E-13 2.9091E-11 1.0352E-14 2.5959E-14 4.5030E-14 -2.8615E-14 2.4357E-14 1.0200E-12 -9.6544E-15 -5.7208E-14 -2.8615E-14 7.0165E-14 -3.3473E-14 -2.4146E-12 1.8552E-13 4.4196E-13 2.4357E-14 -3.3473E-14 4.2890E-13 1.7248E-11 5.0568E-12 2.9091E-11 1.0200E-12 -2.4146E-12 1.7248E-11 1.2260E-09 # lat0 lon0 xBary yBary zBary JD0 -8.377346 151.800204 0.856641 -0.071354 -0.485889 2457745.969459 # Heliocentric elements and errors Epoch: 2457740.5000 = 2016/12/18 Mean Anomaly: 218.64406 +/- 0.389 Argument of Peri: 55.16986 +/- 0.380 Long of Asc Node: 249.16191 +/- 0.006 Inclination: 8.37640 +/- 0.000 Eccentricity: 0.20584240 +/- 0.0008 Semi-Major Axis: 39.52176470 +/- 0.0105 Time of Perihelion: 2493374.4923 +/- 97.1 Perihelion: 31.38650971 +/- 0.0316 Aphelion: 47.65701970 +/- 0.0330 Period (y) 248.4636 +/- 0.10 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -40.05128149 +/- 0.0012 Ecliptic Y 22.44074926 +/- 0.0007 Ecliptic Z -6.68708971 +/- 0.0002 Ecliptic XDOT -0.00088694 +/- 0.0000 Ecliptic YDOT -0.00211716 +/- 0.0000 Ecliptic ZDOT -0.00001116 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 46.39406800 +/- 0.0011 Geocenter to KBO 45.89918349 +/- 0.0014 # Hcoef: 8.24
The following table shows the complete astrometric record for 17BF226. 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 (17BF226) followed by the observatory code and reference code for the source of the astrometry.
2016 12 23.46867 10 03 16.91 +02 59 51.2 24.2z 17BF226 T09 C~7uj6 2016 12 23.51848 10 03 16.80 +02 59 51.2 24.1z 17BF226 T09 C~7uj6 2016 12 23.58951 10 03 16.70 +02 59 51.6 24.0z 17BF226 T09 C~7uj6 2016 12 23.63426 10 03 16.57 +02 59 52.2 24.7z 17BF226 T09 C~7uj6 2017 01 21.42049 10 01 50.23 +03 03 41.3 24.7z 17BF226 T09 C~7n3F 2017 01 21.42316 10 01 50.20 +03 03 41.5 24.4z 17BF226 T09 C~7n3F 2017 01 21.43262 10 01 50.17 +03 03 41.6 24.4z 17BF226 T09 C~7n3F 2017 01 21.46362 10 01 50.06 +03 03 42.1 24.0z 17BF226 T09 C~7n3F 2017 01 21.53071 10 01 49.80 +03 03 43.0 24.4z 17BF226 T09 C~7n3F 2017 01 21.55293 10 01 49.72 +03 03 43.3 24.9z 17BF226 T09 C~7n3F 2017 01 21.58938 10 01 49.55 +03 03 44.0 23.9z 17BF226 T09 C~7n3F 2017 01 21.60826 10 01 49.51 +03 03 44.3 24.5z 17BF226 T09 C~7n3F 2017 01 23.40520 10 01 42.67 +03 04 11.0 25.3r 17BF226 T09 C~7n3F 2017 01 23.41887 10 01 42.62 +03 04 11.4 25.1r 17BF226 T09 C~7n3F 2017 01 23.44005 10 01 42.52 +03 04 11.7 25.4r 17BF226 T09 C~7n3F 2017 01 23.45863 10 01 42.45 +03 04 12.0 25.0r 17BF226 T09 C~7n3F 2017 01 23.49071 10 01 42.34 +03 04 12.6 25.2i 17BF226 T09 C~7n3F 2017 01 23.51343 10 01 42.24 +03 04 12.9 24.8i 17BF226 T09 C~7n3F 2017 01 23.54000 10 01 42.14 +03 04 13.2 25.0i 17BF226 T09 C~7n3F 2017 01 23.58486 10 01 41.97 +03 04 13.9 25.0i 17BF226 T09 C~7n3F 2017 01 30.45397 10 01 14.70 +03 06 09.2 24.4i 17BF226 T09 C~7n3F 2017 01 30.49820 10 01 14.54 +03 06 09.9 24.4z 17BF226 T09 C~7n3F 2017 01 30.52425 10 01 14.40 +03 06 10.2 24.7z 17BF226 T09 C~7n3F 2017 01 30.56119 10 01 14.25 +03 06 10.7 23.9z 17BF226 T09 C~7n3F 2017 01 30.60540 10 01 14.07 +03 06 11.5 24.3z 17BF226 T09 C~7n3F 2017 02 23.46231 09 59 32.60 +03 14 45.8 25.3r 17BF226 T09 C~7n3F 2017 02 23.47596 09 59 32.53 +03 14 46.0 25.2r 17BF226 T09 C~7n3F 2017 02 23.48959 09 59 32.50 +03 14 46.7 25.2r 17BF226 T09 C~7n3F 2017 02 23.50705 09 59 32.40 +03 14 47.0 24.6r 17BF226 T09 C~7n3F 2017 03 04.44888 09 58 54.77 +03 18 28.8 24.7i 17BF226 T09 C~7n3F 2017 03 04.47080 09 58 54.66 +03 18 29.5 24.1i 17BF226 T09 C~7n3F 2017 03 04.49253 09 58 54.60 +03 18 30.0 24.6i 17BF226 T09 C~7n3F 2017 03 22.30641 09 57 46.55 +03 26 02.0 26.3g 17BF226 T09 C~94uA 2017 03 22.32677 09 57 46.44 +03 26 02.4 26.1g 17BF226 T09 C~94uA 2017 03 22.34372 09 57 46.40 +03 26 02.7 25.7g 17BF226 T09 C~94uA 2017 03 22.38390 09 57 46.24 +03 26 03.7 24.4z 17BF226 T09 C~7n3F 2017 03 22.40964 09 57 46.16 +03 26 04.6 24.5z 17BF226 T09 C~7n3F 2017 03 22.43533 09 57 46.07 +03 26 05.2 25.4z 17BF226 T09 C~7n3F 2017 03 22.46098 09 57 45.98 +03 26 05.6 25.0z 17BF226 T09 C~7n3F 2019 02 05.36641 10 08 43.14 +02 21 08.7 24.6i 17BF226 T09 C~81Bm 2019 02 05.39592 10 08 43.03 +02 21 09.2 24.8i 17BF226 T09 C~81Bm 2019 02 05.40928 10 08 42.97 +02 21 09.6 24.8i 17BF226 T09 C~81Bm 2019 02 05.43087 10 08 42.88 +02 21 09.9 24.6i 17BF226 T09 C~81Bm 2019 04 04.370598 10 04 55.41 +02 44 47.6 17BF226 T09 C~81Bm 2019 04 05.365380 10 04 52.58 +02 45 11.6 17BF226 T09 C~81Bm
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 -0.46
2 0.0001 -1.54 -0.03 -0.58 -0.52
3 0.0003 -3.09 ( 0.58) -0.73 ( 0.07)
4 0.0005 -5.12 -0.09 -0.85 0.42
5 0.0793 -1296.59 0.21 -240.12 -0.04
6 0.0793 -1297.08 -0.12 -240.09 0.01
7 0.0793 -1297.53 -0.02 -240.15 0.01
8 0.0794 -1299.25 0.09 -240.26 0.10
9 0.0796 -1303.21 0.08 -240.79 0.01
10 0.0796 -1304.44 0.17 -240.93 0.02
11 0.0797 -1307.07 -0.31 -241.16 0.02
12 0.0798 -1307.74 0.14 -241.09 0.21
13 0.0847 -1413.05 0.08 -252.02 -0.08
14 0.0847 -1413.89 0.06 -251.91 0.12
15 0.0848 -1415.40 -0.17 -252.15 0.00
16 0.0848 -1416.49 -0.14 -252.24 0.03
17 0.0849 -1418.24 0.05 -252.26 0.21
18 0.0850 -1419.75 -0.09 -252.50 0.11
19 0.0851 -1421.26 0.01 -252.75 0.03
20 0.0852 -1423.89 0.09 -252.98 0.07
21 0.1040 -1846.87 -0.09 -288.23 0.14
22 0.1041 -1849.36 0.28 -288.42 0.18
23 0.1042 -1851.43 -0.11 -288.87 -0.15
24 0.1043 -1853.71 -0.00 -289.19 -0.29
25 0.1044 -1856.51 0.04 -289.39 -0.27
26 0.1697 -3460.36 -0.01 -340.23 -0.10
27 0.1698 -3461.42 -0.12 -340.41 -0.27
28 0.1698 -3462.08 0.17 -339.91 0.23
29 0.1699 -3463.59 -0.13 -340.16 -0.02
30 0.1943 -4069.31 0.03 -329.72 0.03
31 0.1944 -4071.10 -0.28 -329.64 0.07
32 0.1945 -4072.11 0.18 -329.48 0.19
33 0.2432 -5185.40 0.30 -262.63 0.24
34 0.2433 -5187.09 -0.20 -262.83 -0.06
35 0.2433 -5187.75 0.12 -262.75 -0.07
36 0.2434 -5190.35 -0.13 -262.66 -0.17
37 0.2435 -5191.79 -0.07 -262.23 0.13
38 0.2436 -5193.26 -0.05 -262.14 0.09
39 0.2436 -5194.66 0.03 -262.24 -0.14
40 2.1188 5393.81 -0.15 -455.76 -0.06
41 2.1189 5392.09 0.09 -455.87 -0.06
42 2.1189 5391.11 -0.01 -455.82 0.05
43 2.1190 5389.74 0.06 -456.01 -0.06
44 2.2776 1699.03 0.04 -327.78 -0.03
45 2.2803 1650.90 -0.02 -320.21 0.12
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.
17BF226 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.350 39.374 39.328 ecceobj 0.208 0.211 0.206 incobj 8.362 8.362 8.362 qmin 30.008 29.923 30.119 qmax 49.399 49.474 49.358 amean 39.455 39.455 39.457 amin 39.073 39.077 39.074 amax 39.909 39.901 39.919 emean 0.211 0.212 0.209 emin 0.181 0.184 0.182 emax 0.239 0.241 0.237 imean 9.666 9.708 9.652 imin 8.788 8.768 8.824 imax 10.947 11.039 10.810 excite_mean 0.270 0.271 0.269 fracstop 1.000 1.000 1.000 cjmean 2.969 2.968 2.969 libcent 0 180.0 180.9 180.7 libamp 0 50.2 49.1 57.0 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 173.4 172.3 174.0 kozaiamp 179.9 180.0 179.9