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: 17BJ230 # Created Sun Dec 22 02:10:54 2024 # Orbit generated from Bernstein formalism # Fitting 36 observations of 36 # Arc: 2.01y # First observation: 2016/01/15 # Last observation: 2018/01/17 Preliminary a, adot, b, bdot, g, gdot: 0.000026 0.022177 -0.000055 -0.011582 0.025022 0.000000 # Chi-squared of fit: 22.28 DOF: 66 RMS: 0.14 # Min/Max residuals: -0.38 0.31 # Exact a, adot, b, bdot, g, gdot: 1.338803E-05 2.232142E-02 -7.741411E-06 -1.167488E-02 2.517527E-02 4.502261E-03 # Covariance matrix: 4.0351E-13 -4.7600E-13 -6.5948E-14 1.4602E-13 -1.0904E-13 -5.6987E-12 -4.7600E-13 9.1256E-13 1.8514E-13 -4.0495E-13 5.2082E-13 1.5807E-11 -6.5948E-14 1.8514E-13 3.2753E-13 -3.1908E-13 1.3762E-13 4.0705E-12 1.4602E-13 -4.0495E-13 -3.1908E-13 4.2126E-13 -2.9606E-13 -8.9005E-12 -1.0904E-13 5.2082E-13 1.3762E-13 -2.9606E-13 5.9949E-13 1.1560E-11 -5.6987E-12 1.5807E-11 4.0705E-12 -8.9005E-12 1.1560E-11 3.4743E-10 # lat0 lon0 xBary yBary zBary JD0 -9.553331 151.251789 0.589507 -0.130474 -0.776323 2457403.111008 # Heliocentric elements and errors Epoch: 2457400.5000 = 2016/01/13 Mean Anomaly: 58.99373 +/- 0.032 Argument of Peri: 121.84827 +/- 0.050 Long of Asc Node: 313.15831 +/- 0.001 Inclination: 29.08202 +/- 0.001 Eccentricity: 0.17255721 +/- 0.0007 Semi-Major Axis: 43.28055980 +/- 0.0122 Time of Perihelion: 2440357.6940 +/- 5.7 Perihelion: 35.81218719 +/- 0.0338 Aphelion: 50.74893241 +/- 0.0353 Period (y) 284.7394 +/- 0.12 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -34.75314483 +/- 0.0011 Ecliptic Y 19.73303448 +/- 0.0006 Ecliptic Z -6.59272398 +/- 0.0002 Ecliptic XDOT -0.00140681 +/- 0.0000 Ecliptic YDOT -0.00200434 +/- 0.0000 Ecliptic ZDOT -0.00133329 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 40.50478657 +/- 0.0010 Geocenter to KBO 39.72151432 +/- 0.0012 # Hcoef: 8.97
The following table shows the complete astrometric record for 17BJ230. 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 (17BJ230) followed by the observatory code and reference code for the source of the astrometry.
2016 01 15.610219 09 59 36.12 +02 05 08.0 17BJ230 T09 C~81Bm 2016 01 15.664261 09 59 35.88 +02 05 08.5 17BJ230 T09 C~81Bm 2016 03 04.422338 09 55 41.06 +02 18 30.0 17BJ230 T09 C~81Bm 2016 12 25.51821 10 04 35.85 +01 01 05.8 26.1r 17BJ230 T09 C~7ujA 2016 12 25.54616 10 04 35.76 +01 01 05.6 25.6r 17BJ230 T09 C~7ujA 2016 12 25.61625 10 04 35.60 +01 01 04.8 25.5i 17BJ230 T09 C~7ujA 2017 01 21.44099 10 02 59.70 +01 01 41.9 25.1z 17BJ230 T09 C~7ujA 2017 01 21.51187 10 02 59.36 +01 01 43.0 24.5z 17BJ230 T09 C~7ujA 2017 01 21.53790 10 02 59.26 +01 01 43.0 25.0z 17BJ230 T09 C~7ujA 2017 01 21.56003 10 02 59.16 +01 01 43.2 24.4z 17BJ230 T09 C~7ujA 2017 01 23.36273 10 02 51.19 +01 02 00.0 24.8r 17BJ230 T09 C~7ujA 2017 01 23.39642 10 02 51.05 +01 02 00.5 25.4r 17BJ230 T09 C~7ujA 2017 01 23.41024 10 02 50.96 +01 02 00.7 25.2r 17BJ230 T09 C~7ujA 2017 01 23.52068 10 02 50.47 +01 02 01.7 25.3i 17BJ230 T09 C~7ujA 2017 01 23.59193 10 02 50.13 +01 02 02.3 25.5i 17BJ230 T09 C~7ujA 2017 01 30.43912 10 02 18.50 +01 03 22.4 24.3i 17BJ230 T09 C~7ujA 2017 01 30.46126 10 02 18.41 +01 03 22.6 24.8i 17BJ230 T09 C~7ujA 2017 01 30.50547 10 02 18.19 +01 03 23.4 24.2z 17BJ230 T09 C~7ujA 2017 01 30.56834 10 02 17.88 +01 03 24.1 24.5z 17BJ230 T09 C~7ujA 2017 01 30.59415 10 02 17.76 +01 03 24.2 24.4z 17BJ230 T09 C~7ujA 2017 01 30.61597 10 02 17.63 +01 03 24.6 23.8z 17BJ230 T09 C~7ujA 2017 03 04.34360 09 59 35.97 +01 13 53.0 24.5z 17BJ230 T09 C~7ujA 2017 03 04.45601 09 59 35.42 +01 13 55.7 24.3i 17BJ230 T09 C~7ujA 2017 03 04.47782 09 59 35.32 +01 13 56.2 24.4i 17BJ230 T09 C~7ujA 2017 03 04.49952 09 59 35.21 +01 13 56.5 24.5i 17BJ230 T09 C~7ujA 2017 03 22.39100 09 58 15.41 +01 21 05.1 24.2z 17BJ230 T09 C~7ujA 2017 03 22.41670 09 58 15.30 +01 21 05.6 24.8z 17BJ230 T09 C~7ujA 2017 03 22.44235 09 58 15.18 +01 21 06.3 24.8z 17BJ230 T09 C~7ujA 2017 03 25.24634 09 58 04.11 +01 22 13.1 24.8r 17BJ230 T09 C~7ujA 2017 03 25.27375 09 58 04.00 +01 22 13.9 25.8r 17BJ230 T09 C~7ujA 2017 03 25.28747 09 58 03.94 +01 22 14.6 25.5r 17BJ230 T09 C~7ujA 2018 01 17.45108 10 07 06.91 -00 02 32.7 25.1i 17BJ230 T09 C~81Bm 2018 01 17.48332 10 07 06.78 -00 02 32.7 24.9i 17BJ230 T09 C~81Bm 2018 01 17.50222 10 07 06.71 -00 02 32.5 25.0i 17BJ230 T09 C~81Bm 2018 01 17.51028 10 07 06.66 -00 02 32.5 25.2i 17BJ230 T09 C~81Bm 2018 01 17.57223 10 07 06.42 -00 02 32.2 25.3i 17BJ230 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 0.13 0.00 0.08
2 0.0001 -3.55 -0.11 -0.79 0.16
3 0.1336 -3582.20 0.05 -476.88 -0.08
4 0.9443 5554.72 -0.18 -2030.98 0.05
5 0.9444 5553.53 -0.38 -2031.64 -0.04
6 0.9446 5551.56 0.14 -2033.23 -0.21
7 1.0180 4190.21 0.24 -2501.07 -0.23
8 1.0182 4185.04 -0.25 -2501.82 0.09
9 1.0183 4183.64 0.07 -2502.35 -0.04
10 1.0183 4182.16 0.05 -2502.68 -0.04
11 1.0233 4064.24 0.19 -2528.69 -0.14
12 1.0234 4062.10 0.31 -2528.96 0.09
13 1.0234 4060.76 -0.09 -2529.24 0.01
14 1.0237 4053.53 0.13 -2530.87 -0.01
15 1.0239 4048.54 -0.04 -2532.09 -0.19
16 1.0427 3575.88 -0.10 -2622.72 0.12
17 1.0427 3574.54 0.17 -2623.00 0.12
18 1.0428 3571.17 0.00 -2623.40 0.29
19 1.0430 3566.57 -0.04 -2624.37 0.13
20 1.0431 3564.85 0.11 -2624.90 -0.08
21 1.0431 3562.88 -0.28 -2625.21 -0.10
22 1.1327 1071.08 -0.04 -2882.68 0.03
23 1.1330 1062.41 -0.07 -2883.02 0.10
24 1.1331 1060.83 0.03 -2883.08 0.13
25 1.1332 1059.18 0.04 -2883.37 -0.09
26 1.1822 -211.99 0.11 -2899.21 0.03
27 1.1822 -213.71 0.09 -2899.32 -0.10
28 1.1823 -215.64 -0.14 -2899.29 -0.10
29 1.1900 -394.54 0.05 -2894.59 -0.26
30 1.1900 -396.36 -0.02 -2894.42 -0.13
31 1.1901 -397.45 -0.24 -2894.07 0.19
32 2.0064 9018.06 -0.12 -4820.24 0.12
33 2.0065 9016.23 0.01 -4820.92 -0.03
34 2.0065 9015.18 0.10 -4821.10 0.11
35 2.0066 9014.47 -0.11 -4821.36 -0.02
36 2.0067 9010.99 0.19 -4822.34 0.03
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.
17BJ230 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 43.123 43.161 43.085 ecceobj 0.175 0.177 0.174 incobj 29.142 29.141 29.142 qmin 34.584 33.215 34.967 qmax 52.039 53.428 51.511 amean 43.127 43.127 43.053 amin 42.736 42.763 42.678 amax 43.554 43.556 43.463 emean 0.173 0.194 0.166 emin 0.157 0.154 0.147 emax 0.195 0.228 0.186 imean 30.521 30.118 30.600 imin 30.120 29.504 30.166 imax 30.888 30.997 31.026 excite_mean 0.537 0.538 0.536 fracstop 1.000 1.000 1.000 cjmean 2.727 2.727 2.728 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 177.9 177.8 191.9 kozaiamp 180.0 179.9 179.9