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: 17BP237 # Created Fri Nov 22 02:10:49 2024 # Orbit generated from Bernstein formalism # Fitting 21 observations of 22 # Arc: 2.45y # First observation: 2016/11/25 # Last observation: 2019/05/09 Preliminary a, adot, b, bdot, g, gdot: 0.000059 0.019830 0.000022 -0.001473 0.022011 0.000000 # Chi-squared of fit: 8.69 DOF: 36 RMS: 0.11 # Min/Max residuals: -0.28 0.27 # Exact a, adot, b, bdot, g, gdot: 1.298399E-05 1.935367E-02 -1.719214E-06 -1.442654E-03 2.143881E-02 -3.300142E-03 # Covariance matrix: 3.5610E-13 6.8903E-13 1.1342E-13 -1.1803E-13 9.1096E-13 2.0163E-11 6.8903E-13 2.3682E-12 3.3318E-13 -4.0267E-13 2.6586E-12 7.0853E-11 1.1342E-13 3.3318E-13 1.4484E-13 -1.0383E-13 4.0117E-13 9.6650E-12 -1.1803E-13 -4.0267E-13 -1.0383E-13 1.6309E-13 -4.4206E-13 -1.3902E-11 9.1096E-13 2.6586E-12 4.0117E-13 -4.4206E-13 3.2145E-12 7.6423E-11 2.0163E-11 7.0853E-11 9.6650E-12 -1.3902E-11 7.6423E-11 2.5169E-09 # lat0 lon0 xBary yBary zBary JD0 -9.909976 150.732533 0.990739 -0.007940 -0.046572 2457718.123079 # Heliocentric elements and errors Epoch: 2457710.5000 = 2016/11/18 Mean Anomaly: 281.45430 +/- 0.320 Argument of Peri: 346.15341 +/- 0.125 Long of Asc Node: 264.12038 +/- 0.004 Inclination: 10.86447 +/- 0.000 Eccentricity: 0.19006402 +/- 0.0025 Semi-Major Axis: 46.79388213 +/- 0.0474 Time of Perihelion: 2483220.0016 +/- 96.4 Perihelion: 37.90004867 +/- 0.1223 Aphelion: 55.68771558 +/- 0.1291 Period (y) 320.1045 +/- 0.49 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -39.64358443 +/- 0.0033 Ecliptic Y 23.34673567 +/- 0.0019 Ecliptic Z -8.02764327 +/- 0.0007 Ecliptic XDOT -0.00081617 +/- 0.0000 Ecliptic YDOT -0.00238127 +/- 0.0000 Ecliptic ZDOT -0.00010900 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 46.70253643 +/- 0.0030 Geocenter to KBO 46.64438983 +/- 0.0039 # Hcoef: 8.91
The following table shows the complete astrometric record for 17BP237. 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 (17BP237) followed by the observatory code and reference code for the source of the astrometry.
2016 11 25.622290 09 57 11.09 +01 55 45.7 17BP237 T09 C~83Er 2016 11 25.637913 09 57 11.07 +01 55 45.2 17BP237 T09 C~83Er 2016 12 25.51570 09 56 36.98 +01 51 46.7 25.9r 17BP237 T09 C~83Er 2016 12 25.59037 09 56 36.82 +01 51 46.8 25.7i 17BP237 T09 C~83Er 2016 12 25.61265 09 56 36.74 +01 51 46.5 25.4i 17BP237 T09 C~83Er 2017 01 21.43628 09 55 13.51 +01 54 39.2 25.2z 17BP237 T09 C~83Er 2017 01 21.45558 09 55 13.42 +01 54 39.4 24.7z 17BP237 T09 C~83Er 2017 01 21.48215 09 55 13.32 +01 54 39.7 24.9z 17BP237 T09 C~83Er 2017 01 21.50822 09 55 13.22 +01 54 40.0 24.5z 17BP237 T09 C~83Er 2017 01 21.53429 09 55 13.12 +01 54 40.4 24.9z 17BP237 T09 C~83Er 2017 01 23.36023 09 55 06.16 +01 55 04.6 26.0r 17BP237 T09 C~83Er 2017 01 23.48266 09 55 05.69 +01 55 06.1 25.1i 17BP237 T09 C~83Er 2017 01 23.51704 09 55 05.54 +01 55 06.7 26.0i 17BP237 T09 C~83Er 2017 01 23.52922 09 55 05.51 +01 55 06.7 25.3i 17BP237 T09 C~83Er 2017 01 23.55808 09 55 05.40 +01 55 07.1 25.7i 17BP237 T09 C~83Er 2017 01 30.43553 09 54 38.13 +01 56 50.9 25.8i 17BP237 T09 C~83Er 2017 01 30.45764 09 54 38.06 +01 56 51.6 25.7i 17BP237 T09 C~83Er 2017 01 30.52778 09 54 37.75 +01 56 52.2 25.6z 17BP237 T09 C~83Er 2019 02 04.395762 10 02 37.76 +01 00 58.7 17BP237 T09 C~83Er 2019 05 09.280721 09 57 58.42 +01 35 47.8 17BP237 T09 C~83Er 2019 05 09.302341 09 57 58.42 +01 35 48.1 17BP237 T09 C~83Er 2019 05 09.375023 09 57 58.40 +01 35 49.0 17BP237 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 0.27 0.00 0.14
2 0.0000 -0.11 0.08 -0.57 -0.21
3 0.0818 -396.60 -0.18 -401.66 0.01
4 0.0820 -398.88 0.00 -402.40 0.21
5 0.0821 -399.90 -0.28 -403.10 -0.21
6 0.1555 -1630.10 0.18 -674.15 0.12
7 0.1556 -1631.44 -0.02 -674.43 -0.00
8 0.1557 -1632.95 0.02 -674.67 -0.03
9 0.1557 -1634.46 0.04 -674.91 -0.06
10 0.1558 -1636.00 0.02 -675.06 0.01
11 0.1608 -1742.27 -0.13 -688.56 0.08
12 0.1612 -1749.40 0.05 -689.60 -0.03
13 0.1612 -1751.72 -0.20 -689.81 0.02
14 0.1613 -1752.14 0.10 -689.97 -0.04
15 0.1614 -1753.82 0.15 -690.17 -0.02
16 0.1802 -2173.30 -0.10 -734.63 0.11
17 0.1802 -2174.53 ( 0.09) -734.34 ( 0.53)
18 0.1804 -2179.10 0.00 -735.39 -0.09
19 2.1924 5736.93 -0.01 -1380.27 -0.04
20 2.4494 1081.44 -0.03 -876.96 0.04
21 2.4495 1081.34 0.04 -876.68 0.06
22 2.4497 1080.74 0.00 -875.94 -0.07
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.
17BP237 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 46.478 46.594 46.367 ecceobj 0.186 0.192 0.179 incobj 10.841 10.840 10.841 qmin 37.046 36.731 37.172 qmax 56.544 57.257 56.177 amean 46.596 46.735 46.484 amin 46.170 46.312 46.082 amax 47.090 47.227 46.966 emean 0.190 0.197 0.183 emin 0.176 0.183 0.170 emax 0.203 0.212 0.198 imean 12.343 12.338 12.346 imin 11.723 11.683 11.735 imax 12.889 12.889 12.885 excite_mean 0.286 0.291 0.282 fracstop 1.000 1.000 1.000 cjmean 3.032 3.030 3.034 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 171.7 171.8 171.8 kozaiamp 179.9 180.0 180.0