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: 17BG237 # Created Mon Apr 28 01:11:03 2025 # Orbit generated from Bernstein formalism # Fitting 36 observations of 36 # Arc: 98.87d # First observation: 2016/11/25 # Last observation: 2017/03/04 Preliminary a, adot, b, bdot, g, gdot: 0.000005 0.036955 0.000028 -0.004677 0.029292 0.000000 # Chi-squared of fit: 45.40 DOF: 66 RMS: 0.20 # Min/Max residuals: -0.44 0.63 # Exact a, adot, b, bdot, g, gdot: 1.965723E-05 3.550380E-02 -3.010391E-06 -4.549954E-03 2.841358E-02 1.791751E-03 # Covariance matrix: 4.5755E-13 -6.1175E-12 -3.7670E-14 -5.8970E-13 -9.4378E-13 9.0741E-12 -6.1175E-12 3.0660E-10 5.7272E-12 1.1421E-11 1.0156E-10 7.0428E-09 -3.7670E-14 5.7272E-12 3.8010E-13 -1.2085E-12 2.2433E-12 1.8698E-10 -5.8970E-13 1.1421E-11 -1.2085E-12 9.2764E-12 1.7067E-12 -1.1061E-10 -9.4378E-13 1.0156E-10 2.2433E-12 1.7067E-12 3.8297E-11 3.0565E-09 9.0741E-12 7.0428E-09 1.8698E-10 -1.1061E-10 3.0565E-09 2.8198E-07 # lat0 lon0 xBary yBary zBary JD0 -9.849163 151.868589 0.991477 -0.004541 -0.027284 2457718.126915 # Heliocentric elements and errors Epoch: 2457710.5000 = 2016/11/18 Mean Anomaly: 1.44113 +/- 1.030 Argument of Peri: 228.76186 +/- 2.803 Long of Asc Node: 278.15389 +/- 0.030 Inclination: 12.39592 +/- 0.005 Eccentricity: 0.42433521 +/- 0.0029 Semi-Major Axis: 61.16666296 +/- 0.2303 Time of Perihelion: 2457011.0242 +/- 499.9 Perihelion: 35.21149409 +/- 0.2197 Aphelion: 87.12183183 +/- 0.3718 Period (y) 478.3881 +/- 2.70 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -30.14013028 +/- 0.0067 Ecliptic Y 17.23252935 +/- 0.0036 Ecliptic Z -6.02032358 +/- 0.0013 Ecliptic XDOT -0.00169455 +/- 0.0000 Ecliptic YDOT -0.00297881 +/- 0.0000 Ecliptic ZDOT -0.00046154 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 35.23679635 +/- 0.0060 Geocenter to KBO 35.19444014 +/- 0.0077 # Hcoef: 10.06
The following table shows the complete astrometric record for 17BG237. 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 (17BG237) followed by the observatory code and reference code for the source of the astrometry.
2016 11 25.626126 10 01 28.02 +01 35 44.4 17BG237 T09 C~85Iq 2016 11 25.629956 10 01 28.02 +01 35 44.2 17BG237 T09 C~85Iq 2016 11 25.637913 10 01 28.02 +01 35 44.0 17BG237 T09 C~85Iq 2017 01 02.50080 10 00 31.94 +01 28 14.1 25.7i 17BG237 T09 C~82nB 2017 01 02.50463 10 00 31.91 +01 28 14.1 25.6i 17BG237 T09 C~82nB 2017 01 02.51228 10 00 31.89 +01 28 14.1 25.4i 17BG237 T09 C~82nB 2017 01 02.52725 10 00 31.85 +01 28 14.1 25.5i 17BG237 T09 C~82nB 2017 01 02.53399 10 00 31.82 +01 28 14.1 25.6i 17BG237 T09 C~82nB 2017 01 02.60039 10 00 31.60 +01 28 14.1 25.8g 17BG237 T09 C~82nB 2017 01 21.43628 09 59 15.49 +01 30 31.7 25.8z 17BG237 T09 C~82nB 2017 01 21.45826 09 59 15.39 +01 30 32.0 26.0z 17BG237 T09 C~82nB 2017 01 21.49713 09 59 15.21 +01 30 32.7 26.1z 17BG237 T09 C~82nB 2017 01 21.50822 09 59 15.17 +01 30 32.9 25.4z 17BG237 T09 C~82nB 2017 01 21.51947 09 59 15.10 +01 30 33.2 25.1z 17BG237 T09 C~82nB 2017 01 21.55646 09 59 14.93 +01 30 33.7 25.6z 17BG237 T09 C~82nB 2017 01 23.37416 09 59 06.40 +01 30 58.2 25.0r 17BG237 T09 C~82nB 2017 01 23.39391 09 59 06.34 +01 30 59.0 24.9r 17BG237 T09 C~82nB 2017 01 23.43372 09 59 06.14 +01 30 59.4 25.3r 17BG237 T09 C~82nB 2017 01 23.45235 09 59 06.04 +01 30 59.9 25.7r 17BG237 T09 C~82nB 2017 01 23.50215 09 59 05.78 +01 31 00.0 24.6i 17BG237 T09 C~82nB 2017 01 23.51704 09 59 05.71 +01 31 00.7 24.9i 17BG237 T09 C~82nB 2017 01 30.43553 09 58 31.76 +01 32 53.8 25.2i 17BG237 T09 C~82nB 2017 01 30.45764 09 58 31.61 +01 32 54.1 25.5i 17BG237 T09 C~82nB 2017 01 30.50184 09 58 31.43 +01 32 55.4 24.8z 17BG237 T09 C~82nB 2017 01 30.52778 09 58 31.27 +01 32 55.4 24.8z 17BG237 T09 C~82nB 2017 01 30.56478 09 58 31.07 +01 32 56.1 25.3z 17BG237 T09 C~82nB 2017 01 30.59058 09 58 30.94 +01 32 56.5 24.9z 17BG237 T09 C~82nB 2017 02 23.46720 09 56 25.16 +01 42 15.7 25.3r 17BG237 T09 C~82nB 2017 02 23.48087 09 56 25.12 +01 42 16.2 25.9r 17BG237 T09 C~82nB 2017 02 23.49450 09 56 25.04 +01 42 16.2 25.6r 17BG237 T09 C~82nB 2017 02 23.51193 09 56 24.92 +01 42 17.1 25.7r 17BG237 T09 C~82nB 2017 03 04.26703 09 55 39.60 +01 46 26.3 24.6z 17BG237 T09 C~82nB 2017 03 04.29255 09 55 39.44 +01 46 27.5 25.4z 17BG237 T09 C~82nB 2017 03 04.45601 09 55 38.60 +01 46 32.2 25.9i 17BG237 T09 C~82nB 2017 03 04.47782 09 55 38.51 +01 46 32.8 25.1i 17BG237 T09 C~82nB 2017 03 04.49952 09 55 38.35 +01 46 33.3 25.3i 17BG237 T09 C~82nB
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 0.02 0.00 0.10
2 0.0000 0.07 0.03 -0.19 -0.01
3 0.0000 0.14 -0.01 -0.37 -0.03
4 0.1037 -629.44 0.00 -716.72 0.04
5 0.1037 -629.87 -0.23 -716.88 -0.06
6 0.1037 -630.15 -0.14 -716.99 -0.03
7 0.1038 -630.71 0.02 -717.20 0.01
8 0.1038 -631.13 -0.07 -717.36 -0.03
9 0.1040 -634.22 0.07 -718.51 -0.06
10 0.1555 -1751.29 -0.08 -989.98 -0.29
11 0.1556 -1752.80 -0.03 -990.22 -0.26
12 0.1557 -1755.58 -0.03 -990.51 -0.06
13 0.1557 -1756.21 0.13 -990.54 0.06
14 0.1558 -1757.30 -0.15 -990.62 0.11
15 0.1559 -1759.86 -0.08 -991.05 0.15
16 0.1608 -1888.25 0.10 -1012.96 -0.40
17 0.1609 -1889.37 0.42 -1012.53 0.27
18 0.1610 -1892.32 0.37 -1013.20 0.07
19 0.1611 -1893.90 0.15 -1013.26 0.23
20 0.1612 -1897.59 0.11 -1014.53 -0.44
21 0.1612 -1898.81 -0.03 -1014.25 0.03
22 0.1802 -2415.28 0.14 -1086.84 0.20
23 0.1802 -2417.50 -0.33 -1087.35 -0.08
24 0.1804 -2420.48 0.16 -1087.08 0.63
25 0.1804 -2422.73 -0.04 -1087.92 0.05
26 0.1805 -2425.78 -0.19 -1088.31 0.02
27 0.1806 -2427.75 -0.12 -1088.62 -0.03
28 0.2460 -4390.64 -0.36 -1225.96 -0.14
29 0.2460 -4391.38 0.07 -1225.70 0.15
30 0.2460 -4392.50 0.11 -1226.12 -0.23
31 0.2461 -4394.50 -0.41 -1225.91 0.02
32 0.2701 -5118.63 0.49 -1230.55 -0.12
33 0.2701 -5121.30 -0.08 -1230.27 0.15
34 0.2706 -5134.75 -0.01 -1230.28 0.07
35 0.2706 -5136.23 0.31 -1230.19 0.15
36 0.2707 -5138.65 -0.32 -1230.56 -0.23
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.
17BG237 quality flag:2 Type: SCATNEAR 3:1EE SCATNEAR axisobj 60.730 62.693 59.311 ecceobj 0.419 0.443 0.403 incobj 12.379 12.368 12.391 qmin 34.273 34.240 34.341 qmax 90.260 92.777 85.464 amean 61.153 62.629 59.180 amin 59.861 61.653 58.254 amax 62.636 63.863 60.264 emean 0.425 0.441 0.402 emin 0.404 0.428 0.384 emax 0.443 0.454 0.420 imean 13.659 14.011 14.074 imin 12.625 13.782 12.955 imax 14.538 14.202 15.063 excite_mean 0.486 0.503 0.470 fracstop 1.000 1.000 1.000 cjmean 3.000 2.991 2.999 libcent 0 -180.0 179.0 -180.0 libamp 0 -180.0 154.6 -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 198.1 185.6 179.3 kozaiamp 179.9 179.9 180.0