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: 17BZ244 # Created Wed Apr 16 01:11:05 2025 # Orbit generated from Bernstein formalism # Fitting 26 observations of 26 # Arc: 1.87y # First observation: 2015/03/22 # Last observation: 2017/02/01 Preliminary a, adot, b, bdot, g, gdot: -0.000306 0.020281 0.000017 0.000945 0.021606 0.000000 # Chi-squared of fit: 25.24 DOF: 46 RMS: 0.17 # Min/Max residuals: -0.60 0.38 # Exact a, adot, b, bdot, g, gdot: 1.373935E-05 1.992844E-02 5.367071E-07 9.599659E-04 2.225790E-02 2.000714E-03 # Covariance matrix: 4.8770E-13 -7.0348E-13 6.4311E-15 -2.0906E-14 -3.3645E-13 -1.0640E-11 -7.0348E-13 2.2736E-12 -4.3537E-14 1.0541E-13 2.0462E-12 5.2803E-11 6.4311E-15 -4.3537E-14 3.5800E-13 -2.1978E-13 -6.6745E-14 -1.3619E-12 -2.0906E-14 1.0541E-13 -2.1978E-13 1.6308E-13 1.2484E-13 2.8864E-12 -3.3645E-13 2.0462E-12 -6.6745E-14 1.2484E-13 2.9013E-12 6.1374E-11 -1.0640E-11 5.2803E-11 -1.3619E-12 2.8864E-12 6.1374E-11 1.4328E-09 # lat0 lon0 xBary yBary zBary JD0 -14.543948 143.008034 -0.614783 -0.195781 -0.755164 2457103.887218 # Heliocentric elements and errors Epoch: 2457100.5000 = 2015/03/19 Mean Anomaly: 109.84589 +/- 0.404 Argument of Peri: 158.71290 +/- 0.385 Long of Asc Node: 222.11855 +/- 0.005 Inclination: 14.58592 +/- 0.000 Eccentricity: 0.12565741 +/- 0.0015 Semi-Major Axis: 43.27967627 +/- 0.0100 Time of Perihelion: 2425367.8947 +/- 116.3 Perihelion: 37.84126429 +/- 0.0672 Aphelion: 48.71808825 +/- 0.0676 Period (y) 284.7306 +/- 0.10 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -35.73139766 +/- 0.0027 Ecliptic Y 26.14525059 +/- 0.0020 Ecliptic Z -11.28236268 +/- 0.0009 Ecliptic XDOT -0.00169230 +/- 0.0000 Ecliptic YDOT -0.00180253 +/- 0.0000 Ecliptic ZDOT 0.00005258 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 45.69024639 +/- 0.0024 Geocenter to KBO 44.92786459 +/- 0.0034 # Hcoef: 8.30
The following table shows the complete astrometric record for 17BZ244. 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 (17BZ244) followed by the observatory code and reference code for the source of the astrometry.
2015 03 22.38644 09 22 32.50 +00 04 22.7 24.8i 17BZ244 T09 C~8nfR 2015 03 22.42499 09 22 32.37 +00 04 23.7 24.5i 17BZ244 T09 C~8nfR 2015 03 22.435986 09 22 32.34 +00 04 24.1 17BZ244 T09 C~89UU 2016 04 02.322882 09 26 25.16 -00 08 47.5 17BZ244 T09 C~89UU 2016 04 02.34721 09 26 25.09 -00 08 46.8 25.0i 17BZ244 T09 C~8COq 2016 04 02.352343 09 26 25.08 -00 08 46.8 17BZ244 T09 C~89UU 2016 04 04.24125 09 26 20.87 -00 07 54.4 25.6g 17BZ244 T09 C~8COq 2016 04 04.249044 09 26 20.86 -00 07 54.5 17BZ244 T09 C~89UU 2016 04 04.263886 09 26 20.82 -00 07 54.0 17BZ244 T09 C~89UU 2016 04 04.27871 09 26 20.78 -00 07 53.5 25.9g 17BZ244 T09 C~8COq 2016 11 28.510695 09 37 35.62 -00 54 28.2 17BZ244 T09 C~89UU 2016 11 28.559107 09 37 35.59 -00 54 28.6 17BZ244 T09 C~89UU 2016 11 28.57602 09 37 35.54 -00 54 28.9 26.4r 17BZ244 T09 C~8COq 2016 11 28.578104 09 37 35.57 -00 54 29.1 17BZ244 T09 C~89UU 2016 11 28.62886 09 37 35.48 -00 54 29.9 26.4r 17BZ244 T09 C~8COq 2016 11 29.509563 09 37 34.98 -00 54 44.3 17BZ244 T09 C~89UU 2017 01 21.36520 09 35 18.88 -00 56 07.6 24.4z 17BZ244 T09 C~89UU 2017 01 21.38272 09 35 18.79 -00 56 07.1 23.8z 17BZ244 T09 C~89UU 2017 01 21.39079 09 35 18.76 -00 56 06.9 24.4z 17BZ244 T09 C~89UU 2017 01 21.40149 09 35 18.72 -00 56 06.8 24.4z 17BZ244 T09 C~89UU 2017 01 28.382983 09 34 49.97 -00 54 25.4 17BZ244 T09 C~89UU 2017 01 28.401948 09 34 49.90 -00 54 25.0 17BZ244 T09 C~89UU 2017 02 01.54186 09 34 32.28 -00 53 14.1 24.3i 17BZ244 T09 C~89UU 2017 02 01.55002 09 34 32.27 -00 53 13.7 24.0i 17BZ244 T09 C~89UU 2017 02 01.57762 09 34 32.13 -00 53 13.4 24.3i 17BZ244 T09 C~89UU 2017 02 01.58031 09 34 32.14 -00 53 13.4 24.0i 17BZ244 T09 C~89UU
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 0.09 0.00 0.03
2 0.0001 -2.17 -0.05 0.33 -0.11
3 0.0001 -2.72 -0.02 0.56 -0.01
4 1.0320 3560.49 0.08 359.56 0.06
5 1.0321 3559.27 -0.10 359.89 0.03
6 1.0321 3559.13 -0.03 359.85 -0.10
7 1.0372 3482.58 -0.06 389.47 0.24
8 1.0373 3482.47 0.15 389.33 -0.02
9 1.0373 3481.74 0.02 389.61 0.03
10 1.0374 3481.01 -0.10 389.90 0.09
11 1.6896 13987.84 0.38 955.30 -0.17
12 1.6897 13987.53 0.27 954.78 0.21
13 1.6898 13986.92 -0.28 954.26 0.01
14 1.6898 13987.41 0.22 954.21 -0.00
15 1.6899 13986.38 -0.60 953.02 -0.24
16 1.6923 13983.82 0.08 936.95 -0.21
17 1.8370 12066.79 0.18 208.67 -0.28
18 1.8371 12065.34 -0.18 208.72 -0.11
19 1.8371 12064.85 -0.16 208.76 -0.01
20 1.8371 12064.25 -0.10 208.67 -0.02
21 1.8563 11621.71 0.14 167.92 0.03
22 1.8563 11620.58 0.27 167.96 0.17
23 1.8676 11346.63 -0.22 151.30 -0.04
24 1.8677 11346.36 0.06 151.63 0.32
25 1.8677 11344.26 -0.17 151.25 0.03
26 1.8677 11344.41 0.16 151.30 0.09
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.
17BZ244 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 43.109 43.139 43.079 ecceobj 0.132 0.135 0.129 incobj 14.584 14.584 14.584 qmin 36.190 36.832 36.260 qmax 50.480 49.728 50.321 amean 43.129 43.129 43.095 amin 42.766 42.768 42.721 amax 43.533 43.537 43.516 emean 0.138 0.129 0.135 emin 0.121 0.115 0.117 emax 0.160 0.143 0.157 imean 15.573 15.863 15.786 imin 14.786 15.253 15.082 imax 16.239 16.409 16.563 excite_mean 0.302 0.302 0.304 fracstop 1.000 1.000 1.000 cjmean 2.981 2.981 2.980 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 183.5 189.5 187.8 kozaiamp 179.9 180.0 179.9