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: 17BS237 # Created Sun Apr 27 01:11:03 2025 # Orbit generated from Bernstein formalism # Fitting 33 observations of 33 # Arc: 3.24y # First observation: 2015/12/05 # Last observation: 2019/03/03 Preliminary a, adot, b, bdot, g, gdot: 0.000194 0.023791 0.000095 0.007744 0.023104 0.000000 # Chi-squared of fit: 22.59 DOF: 60 RMS: 0.15 # Min/Max residuals: -0.43 0.31 # Exact a, adot, b, bdot, g, gdot: 1.551505E-05 2.418606E-02 7.249691E-06 7.869842E-03 2.366529E-02 9.922597E-03 # Covariance matrix: 4.3998E-13 -6.0291E-13 1.0959E-13 -1.8179E-13 -2.6253E-13 -6.9452E-12 -6.0291E-13 1.5259E-12 -2.1607E-13 4.6206E-13 1.5883E-12 1.6893E-11 1.0959E-13 -2.1607E-13 2.0683E-13 -1.6937E-13 -1.3519E-13 -2.8653E-12 -1.8179E-13 4.6206E-13 -1.6937E-13 2.2520E-13 4.4645E-13 5.5817E-12 -2.6253E-13 1.5883E-12 -1.3519E-13 4.4645E-13 2.6193E-12 1.5427E-11 -6.9452E-12 1.6893E-11 -2.8653E-12 5.5817E-12 1.5427E-11 2.0718E-10 # lat0 lon0 xBary yBary zBary JD0 -8.675704 149.525377 0.961583 -0.033886 -0.223351 2457362.127513 # Heliocentric elements and errors Epoch: 2457360.5000 = 2015/12/04 Mean Anomaly: 17.53327 +/- 0.024 Argument of Peri: 273.53471 +/- 0.040 Long of Asc Node: 173.50348 +/- 0.001 Inclination: 19.55498 +/- 0.001 Eccentricity: 0.53444982 +/- 0.0006 Semi-Major Axis: 75.45486537 +/- 0.0672 Time of Perihelion: 2445700.7389 +/- 1.9 Perihelion: 35.12802625 +/- 0.0544 Aphelion: 115.78170450 +/- 0.1124 Period (y) 655.4493 +/- 0.88 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -35.71289258 +/- 0.0025 Ecliptic Y 22.12674938 +/- 0.0014 Ecliptic Z -6.37369188 +/- 0.0004 Ecliptic XDOT -0.00251662 +/- 0.0000 Ecliptic YDOT -0.00177318 +/- 0.0000 Ecliptic ZDOT 0.00072693 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.49267799 +/- 0.0022 Geocenter to KBO 42.25598774 +/- 0.0029 # Hcoef: 8.24
The following table shows the complete astrometric record for 17BS237. 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 (17BS237) followed by the observatory code and reference code for the source of the astrometry.
2015 12 05.626724 09 54 24.87 +03 29 56.7 17BS237 T14 C~83Er 2015 12 05.629664 09 54 24.86 +03 29 56.9 17BS237 T14 C~83Er 2015 12 05.632624 09 54 24.88 +03 29 57.0 17BS237 T14 C~83Er 2016 12 23.51489 09 59 48.38 +03 26 38.9 24.1z 17BS237 T09 C~83Er 2016 12 23.58584 09 59 48.23 +03 26 38.9 24.6z 17BS237 T09 C~83Er 2016 12 23.63065 09 59 48.09 +03 26 39.4 25.0z 17BS237 T09 C~83Er 2016 12 25.53845 09 59 44.04 +03 26 49.9 25.2r 17BS237 T09 C~83Er 2016 12 25.60536 09 59 43.89 +03 26 50.3 24.3i 17BS237 T09 C~83Er 2017 01 21.42316 09 58 20.36 +03 32 42.7 24.1z 17BS237 T09 C~83Er 2017 01 21.47486 09 58 20.17 +03 32 43.7 23.9z 17BS237 T09 C~83Er 2017 01 21.50089 09 58 20.06 +03 32 44.2 24.0z 17BS237 T09 C~83Er 2017 01 21.52708 09 58 19.96 +03 32 44.7 24.2z 17BS237 T09 C~83Er 2017 01 21.54935 09 58 19.87 +03 32 45.3 24.2z 17BS237 T09 C~83Er 2017 01 21.58938 09 58 19.71 +03 32 45.8 24.4z 17BS237 T09 C~83Er 2017 01 23.35517 09 58 12.82 +03 33 21.5 24.6r 17BS237 T09 C~83Er 2017 01 23.37982 09 58 12.73 +03 33 21.8 24.5r 17BS237 T09 C~83Er 2017 01 23.40271 09 58 12.64 +03 33 22.1 24.6r 17BS237 T09 C~83Er 2017 01 23.42310 09 58 12.56 +03 33 22.8 24.7r 17BS237 T09 C~83Er 2017 01 23.44005 09 58 12.50 +03 33 23.1 24.7r 17BS237 T09 C~83Er 2017 01 23.50979 09 58 12.22 +03 33 24.5 24.2i 17BS237 T09 C~83Er 2017 01 23.54000 09 58 12.10 +03 33 25.0 24.1i 17BS237 T09 C~83Er 2017 01 23.57255 09 58 11.97 +03 33 25.8 24.1i 17BS237 T09 C~83Er 2017 01 23.58131 09 58 11.94 +03 33 26.2 24.4i 17BS237 T09 C~83Er 2017 01 30.40627 09 57 44.18 +03 35 55.7 24.4i 17BS237 T09 C~83Er 2017 01 30.45035 09 57 43.98 +03 35 56.6 24.4i 17BS237 T09 C~83Er 2017 01 30.49455 09 57 43.80 +03 35 57.4 24.5z 17BS237 T09 C~83Er 2017 01 30.52066 09 57 43.67 +03 35 58.3 24.5z 17BS237 T09 C~83Er 2017 01 30.55762 09 57 43.53 +03 35 59.1 24.3z 17BS237 T09 C~83Er 2017 01 30.60540 09 57 43.31 +03 36 00.3 24.3z 17BS237 T09 C~83Er 2019 02 05.37652 10 08 48.97 +03 31 13.1 24.3i 17BS237 T09 C~83Er 2019 02 05.40394 10 08 48.84 +03 31 14.0 24.4i 17BS237 T09 C~83Er 2019 02 05.42003 10 08 48.78 +03 31 14.3 24.5i 17BS237 T09 C~83Er 2019 03 03.297566 10 06 58.24 +03 43 19.5 17BS237 T09 C~83Er
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 0.13 0.00 -0.41
2 0.0000 -0.21 -0.05 0.14 -0.25
3 0.0000 0.04 0.22 0.33 -0.03
4 1.0510 4616.81 0.14 1481.47 0.30
5 1.0512 4614.70 0.29 1480.69 -0.03
6 1.0513 4612.56 -0.43 1480.44 0.01
7 1.0566 4551.98 -0.02 1469.38 -0.01
8 1.0568 4549.73 0.03 1468.98 -0.00
9 1.1302 3253.78 -0.11 1368.69 0.08
10 1.1303 3250.76 0.08 1368.65 0.13
11 1.1304 3249.04 -0.02 1368.55 0.08
12 1.1305 3247.46 0.04 1368.51 0.08
13 1.1305 3245.99 -0.05 1368.61 0.22
14 1.1306 3243.57 0.02 1368.25 -0.06
15 1.1355 3134.41 -0.33 1366.23 0.10
16 1.1355 3133.04 -0.14 1366.05 -0.05
17 1.1356 3131.67 -0.06 1365.87 -0.20
18 1.1357 3130.30 -0.13 1366.11 0.08
19 1.1357 3129.36 0.00 1366.08 0.07
20 1.1359 3124.94 0.02 1365.95 0.05
21 1.1360 3123.08 0.08 1365.80 -0.06
22 1.1361 3120.98 0.05 1365.88 0.07
23 1.1361 3120.42 0.05 1366.11 0.31
24 1.1548 2678.67 0.12 1363.33 0.15
25 1.1549 2675.55 -0.01 1363.14 -0.04
26 1.1550 2672.74 0.19 1362.96 -0.21
27 1.1551 2670.60 -0.18 1363.14 -0.03
28 1.1552 2668.36 0.09 1363.17 0.00
29 1.1553 2664.85 -0.18 1363.16 -0.00
30 3.1697 12131.12 0.13 4544.49 -0.18
31 3.1698 12128.97 -0.14 4544.66 -0.05
32 3.1699 12128.02 0.01 4544.63 -0.10
33 3.2407 10318.69 0.16 4649.88 -0.04
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.
17BS237 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 75.296 75.490 75.101 ecceobj 0.535 0.537 0.534 incobj 19.616 19.616 19.616 qmin 34.181 34.355 34.348 qmax 117.164 117.581 117.580 amean 73.938 74.490 74.689 amin 72.599 73.030 73.303 amax 76.148 76.371 76.395 emean 0.522 0.523 0.523 emin 0.504 0.503 0.506 emax 0.539 0.541 0.539 imean 19.485 19.808 19.841 imin 18.577 18.926 18.922 imax 20.479 20.828 20.832 excite_mean 0.619 0.623 0.624 fracstop 1.000 1.000 1.000 cjmean 2.927 2.926 2.928 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 192.9 188.5 188.2 kozaiamp 180.0 179.9 180.0