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: 17BR237 # Created Sun Dec 22 02:10:55 2024 # Orbit generated from Bernstein formalism # Fitting 39 observations of 40 # Arc: 2.37y # First observation: 2016/12/25 # Last observation: 2019/05/09 Preliminary a, adot, b, bdot, g, gdot: 0.000007 0.022377 0.000011 0.005029 0.024106 0.000000 # Chi-squared of fit: 27.19 DOF: 72 RMS: 0.15 # Min/Max residuals: -0.55 0.35 # Exact a, adot, b, bdot, g, gdot: 1.462600E-05 2.227736E-02 4.845689E-06 5.067230E-03 2.389841E-02 4.032193E-03 # Covariance matrix: 1.7971E-13 2.8632E-13 1.1021E-14 8.7145E-14 3.7266E-13 8.1836E-12 2.8632E-13 1.0498E-12 1.8938E-14 3.1732E-13 9.5844E-13 2.9231E-11 1.1021E-14 1.8938E-14 5.0603E-14 -2.2150E-14 2.9545E-14 3.9687E-13 8.7145E-14 3.1732E-13 -2.2150E-14 1.6270E-13 2.7792E-13 9.7383E-12 3.7266E-13 9.5844E-13 2.9545E-14 2.7792E-13 1.0831E-12 2.5948E-11 8.1836E-12 2.9231E-11 3.9687E-13 9.7383E-12 2.5948E-11 8.9216E-10 # lat0 lon0 xBary yBary zBary JD0 -9.009663 151.715808 0.837392 -0.081685 -0.516429 2457748.008209 # Heliocentric elements and errors Epoch: 2457740.5000 = 2016/12/18 Mean Anomaly: 75.97843 +/- 0.150 Argument of Peri: 230.55853 +/- 0.047 Long of Asc Node: 185.39561 +/- 0.001 Inclination: 15.33135 +/- 0.001 Eccentricity: 0.15372160 +/- 0.0013 Semi-Major Axis: 42.97103531 +/- 0.0174 Time of Perihelion: 2436025.9932 +/- 40.7 Perihelion: 36.36545884 +/- 0.0568 Aphelion: 49.57661178 +/- 0.0584 Period (y) 281.6903 +/- 0.17 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -36.46069140 +/- 0.0016 Ecliptic Y 20.56359217 +/- 0.0009 Ecliptic Z -6.55261904 +/- 0.0003 Ecliptic XDOT -0.00168858 +/- 0.0000 Ecliptic YDOT -0.00199489 +/- 0.0000 Ecliptic ZDOT 0.00050096 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.36956640 +/- 0.0014 Geocenter to KBO 41.84378088 +/- 0.0018 # Hcoef: 9.18
The following table shows the complete astrometric record for 17BR237. 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 (17BR237) followed by the observatory code and reference code for the source of the astrometry.
2016 12 25.50742 10 02 04.84 +02 26 04.9 25.7r 17BR237 T09 C~83Er 2016 12 25.53531 10 02 04.76 +02 26 05.2 25.5r 17BR237 T09 C~83Er 2016 12 25.54929 10 02 04.77 +02 26 05.6 25.2r 17BR237 T09 C~83Er 2016 12 25.57554 10 02 04.75 +02 26 05.6 25.6i 17BR237 T09 C~83Er 2017 01 21.44467 10 00 38.20 +02 31 03.8 24.8z 17BR237 T09 C~83Er 2017 01 21.44850 10 00 38.19 +02 31 04.0 25.2z 17BR237 T09 C~83Er 2017 01 21.45233 10 00 38.18 +02 31 04.2 25.0z 17BR237 T09 C~83Er 2017 01 21.48947 10 00 38.02 +02 31 04.7 24.5z 17BR237 T09 C~83Er 2017 01 21.49330 10 00 38.02 +02 31 04.7 25.2z 17BR237 T09 C~83Er 2017 01 21.49713 10 00 38.00 +02 31 04.7 25.0z 17BR237 T09 C~83Er 2017 01 21.50455 10 00 37.95 +02 31 04.8 24.9z 17BR237 T09 C~83Er 2017 01 21.51947 10 00 37.90 +02 31 05.2 24.9z 17BR237 T09 C~83Er 2017 01 21.52330 10 00 37.90 +02 31 05.3 25.8z 17BR237 T09 C~83Er 2017 01 21.54162 10 00 37.81 +02 31 05.5 25.1z 17BR237 T09 C~83Er 2017 01 23.41887 10 00 30.22 +02 31 40.4 25.1r 17BR237 T09 C~83Er 2017 01 23.44310 10 00 30.16 +02 31 40.6 25.7r 17BR237 T09 C~83Er 2017 01 23.49071 10 00 29.97 +02 31 41.8 25.1i 17BR237 T09 C~83Er 2017 01 23.50215 10 00 29.91 +02 31 41.8 25.3i 17BR237 T09 C~83Er 2017 01 23.50600 10 00 29.88 +02 31 42.0 25.5i 17BR237 T09 C~83Er 2017 01 23.54331 10 00 29.72 +02 31 42.6 25.9i 17BR237 T09 C~83Er 2017 01 23.59562 10 00 29.52 +02 31 43.5 25.0i 17BR237 T09 C~83Er 2017 01 30.55385 10 00 00.25 +02 34 05.7 25.0z 17BR237 T09 C~83Er 2017 01 30.55762 10 00 00.23 +02 34 06.2 25.1z 17BR237 T09 C~83Er 2017 01 30.57208 10 00 00.18 +02 34 06.4 25.3z 17BR237 T09 C~83Er 2017 02 02.42933 09 59 47.70 +02 35 10.5 25.4r 17BR237 T09 C~83Er 2017 02 02.44397 09 59 47.65 +02 35 10.8 25.8r 17BR237 T09 C~83Er 2017 02 02.45873 09 59 47.59 +02 35 11.3 25.4r 17BR237 T09 C~83Er 2017 02 02.46207 09 59 47.57 +02 35 11.5 26.0r 17BR237 T09 C~83Er 2017 02 23.47596 09 58 12.46 +02 44 25.6 25.7r 17BR237 T09 C~83Er 2017 02 23.48959 09 58 12.39 +02 44 25.9 25.1r 17BR237 T09 C~83Er 2017 03 04.44888 09 57 32.55 +02 48 51.8 26.2i 17BR237 T09 C~83Er 2017 03 04.47080 09 57 32.45 +02 48 52.3 25.6i 17BR237 T09 C~83Er 2017 03 04.49253 09 57 32.35 +02 48 53.0 25.6i 17BR237 T09 C~83Er 2019 02 05.36641 10 10 02.90 +02 14 43.8 25.1i 17BR237 T09 C~83Er 2019 02 05.38256 10 10 02.82 +02 14 44.3 24.6i 17BR237 T09 C~83Er 2019 02 05.39592 10 10 02.79 +02 14 44.5 24.7i 17BR237 T09 C~83Er 2019 02 05.43354 10 10 02.61 +02 14 45.5 24.7i 17BR237 T09 C~83Er 2019 05 09.277239 10 05 06.64 +02 56 13.3 17BR237 T09 C~83Er 2019 05 09.298852 10 05 06.62 +02 56 13.8 17BR237 T09 C~83Er 2019 05 09.349895 10 05 06.61 +02 56 14.6 17BR237 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 0.02 0.00 -0.31
2 0.0001 -1.23 -0.24 -0.14 -0.20
3 0.0001 -1.23 0.25 0.29 0.35
4 0.0002 -1.51 ( 0.88) 0.18 ( 0.48)
5 0.0738 -1320.81 -0.04 -175.11 -0.04
6 0.0738 -1321.02 -0.00 -174.98 0.11
7 0.0738 -1321.23 0.03 -174.84 0.26
8 0.0739 -1323.65 -0.04 -175.22 0.06
9 0.0739 -1323.65 0.20 -175.22 0.07
10 0.0739 -1323.93 0.17 -175.32 -0.01
11 0.0739 -1324.67 -0.10 -175.49 -0.15
12 0.0740 -1325.51 0.00 -175.38 0.03
13 0.0740 -1325.54 0.21 -175.28 0.14
14 0.0740 -1326.88 0.04 -175.57 -0.06
15 0.0792 -1445.64 -0.55 -182.73 0.02
16 0.0792 -1446.55 0.11 -182.86 -0.01
17 0.0794 -1449.64 0.11 -182.73 0.31
18 0.0794 -1450.48 0.01 -183.04 0.04
19 0.0794 -1450.97 -0.23 -183.01 0.09
20 0.0795 -1453.43 -0.26 -183.29 -0.03
21 0.0796 -1456.55 0.01 -183.50 -0.03
22 0.0987 -1917.22 0.12 -203.95 -0.26
23 0.0987 -1917.68 -0.08 -203.58 0.11
24 0.0987 -1918.45 0.16 -203.66 0.07
25 0.1066 -2116.08 -0.13 -209.11 -0.24
26 0.1066 -2116.89 0.10 -209.10 -0.20
27 0.1066 -2117.91 0.13 -208.94 -0.01
28 0.1067 -2118.26 0.02 -208.86 0.07
29 0.1642 -3647.47 0.04 -188.67 0.12
30 0.1642 -3648.56 -0.03 -188.76 -0.00
31 0.1888 -4301.00 0.00 -148.46 -0.01
32 0.1888 -4302.58 0.02 -148.52 -0.17
33 0.1889 -4304.23 -0.06 -148.39 -0.15
34 2.1132 6950.39 -0.05 1879.93 -0.07
35 2.1133 6949.09 -0.21 1879.98 -0.01
36 2.1133 6948.59 0.24 1880.01 0.04
37 2.1134 6945.71 0.01 1879.99 0.06
38 2.3676 1916.42 0.14 2649.45 -0.04
39 2.3677 1915.97 -0.10 2649.81 0.02
40 2.3678 1915.55 -0.03 2650.51 0.01
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.
17BR237 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 42.906 42.961 42.853 ecceobj 0.159 0.162 0.156 incobj 15.386 15.385 15.387 qmin 34.971 34.855 35.072 qmax 51.013 51.376 50.870 amean 42.845 42.870 42.796 amin 42.477 42.483 42.419 amax 43.259 43.321 43.203 emean 0.163 0.165 0.159 emin 0.144 0.145 0.142 emax 0.181 0.186 0.179 imean 15.737 15.724 15.720 imin 14.813 14.775 14.825 imax 16.653 16.682 16.611 excite_mean 0.317 0.317 0.314 fracstop 1.000 1.000 1.000 cjmean 2.969 2.968 2.970 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 180.0 179.7 180.1 kozaiamp 180.0 180.0 180.0