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: 17BQ236 # Created Mon Apr 28 01:11:03 2025 # Orbit generated from Bernstein formalism # Fitting 22 observations of 22 # Arc: 1.87y # First observation: 2015/03/22 # Last observation: 2017/02/01 Preliminary a, adot, b, bdot, g, gdot: -0.000210 0.030737 -0.000009 0.008166 0.026818 0.000000 # Chi-squared of fit: 9.30 DOF: 38 RMS: 0.11 # Min/Max residuals: -0.21 0.31 # Exact a, adot, b, bdot, g, gdot: 1.648524E-05 2.970100E-02 4.357565E-06 8.097267E-03 2.777179E-02 -4.163741E-03 # Covariance matrix: 2.9221E-13 -4.0410E-13 4.2877E-15 -5.9527E-14 -1.4954E-13 -3.9457E-12 -4.0410E-13 3.5690E-12 -6.8277E-14 8.8087E-13 2.5826E-12 5.8028E-11 4.2877E-15 -6.8277E-14 2.7480E-13 -1.7422E-13 -7.3253E-14 -1.2965E-12 -5.9527E-14 8.8087E-13 -1.7422E-13 3.5553E-13 8.0118E-13 1.5758E-11 -1.4954E-13 2.5826E-12 -7.3253E-14 8.0118E-13 3.2029E-12 5.1947E-11 -3.9457E-12 5.8028E-11 -1.2965E-12 1.5758E-11 5.1947E-11 1.0325E-09 # lat0 lon0 xBary yBary zBary JD0 -13.902806 141.360210 -0.636826 -0.183018 -0.739939 2457103.877264 # Heliocentric elements and errors Epoch: 2457100.5000 = 2015/03/19 Mean Anomaly: 332.58755 +/- 0.139 Argument of Peri: 358.94048 +/- 0.238 Long of Asc Node: 182.78509 +/- 0.001 Inclination: 20.48920 +/- 0.001 Eccentricity: 0.20485781 +/- 0.0009 Semi-Major Axis: 44.28043175 +/- 0.0246 Time of Perihelion: 2465295.7362 +/- 40.9 Perihelion: 35.20923938 +/- 0.0439 Aphelion: 53.35162411 +/- 0.0492 Period (y) 294.6632 +/- 0.25 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -28.29781584 +/- 0.0018 Ecliptic Y 21.80387921 +/- 0.0014 Ecliptic Z -8.65162025 +/- 0.0006 Ecliptic XDOT -0.00167030 +/- 0.0000 Ecliptic YDOT -0.00242189 +/- 0.0000 Ecliptic ZDOT 0.00087359 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 36.75630644 +/- 0.0016 Geocenter to KBO 36.00775726 +/- 0.0023 # Hcoef: 8.44
The following table shows the complete astrometric record for 17BQ236. 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 (17BQ236) followed by the observatory code and reference code for the source of the astrometry.
2015 03 22.376486 09 17 16.90 +01 11 00.9 17BQ236 T09 C~81Bo 2015 03 22.40027 09 17 16.81 +01 11 01.8 23.8i 17BQ236 T09 C~8ifL 2015 03 22.43327 09 17 16.69 +01 11 03.0 23.6i 17BQ236 T09 C~8ifL 2015 03 22.43873 09 17 16.67 +01 11 03.2 23.7i 17BQ236 T09 C~8ifL 2015 03 22.453542 09 17 16.63 +01 11 03.7 17BQ236 T09 C~81Bo 2016 04 04.246919 09 23 41.56 +01 13 56.0 17BQ236 T09 C~81Bo 2016 04 04.268116 09 23 41.51 +01 13 56.7 17BQ236 T09 C~81Bo 2016 11 28.52757 09 38 52.83 +00 25 57.9 24.9r 17BQ236 T09 C~81Bo 2016 11 28.62241 09 38 52.79 +00 25 56.2 24.6r 17BQ236 T09 C~81Bo 2016 11 28.63517 09 38 52.78 +00 25 56.2 25.4r 17BQ236 T09 C~81Bo 2017 01 21.37198 09 36 16.69 +00 28 03.7 23.4z 17BQ236 T09 C~81Bo 2017 01 21.39613 09 36 16.56 +00 28 04.1 23.5z 17BQ236 T09 C~81Bo 2017 01 21.40419 09 36 16.52 +00 28 04.2 22.9z 17BQ236 T09 C~81Bo 2017 01 21.41223 09 36 16.47 +00 28 04.4 23.4z 17BQ236 T09 C~81Bo 2017 01 28.39139 09 35 42.16 +00 30 39.3 24.8g 17BQ236 T09 C~81Bo 2017 01 28.40825 09 35 42.09 +00 30 39.6 24.7g 17BQ236 T09 C~81Bo 2017 01 28.41463 09 35 42.05 +00 30 40.0 24.5g 17BQ236 T09 C~81Bo 2017 01 28.41673 09 35 42.03 +00 30 39.6 24.6g 17BQ236 T09 C~81Bo 2017 02 01.48410 09 35 21.37 +00 32 22.1 23.8i 17BQ236 T09 C~81Bo 2017 02 01.51446 09 35 21.21 +00 32 23.1 23.7i 17BQ236 T09 C~81Bo 2017 02 01.52538 09 35 21.15 +00 32 23.5 23.7i 17BQ236 T09 C~81Bo 2017 02 01.55545 09 35 21.00 +00 32 24.5 23.6i 17BQ236 T09 C~81Bo
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 0.05
2 0.0001 -1.56 -0.01 0.44 0.03
3 0.0002 -3.65 -0.08 1.02 -0.02
4 0.0002 -3.99 -0.09 1.11 -0.02
5 0.0002 -4.72 0.09 1.40 -0.02
6 1.0373 5429.42 -0.02 1961.22 -0.01
7 1.0373 5428.49 0.03 1961.65 -0.05
8 1.6897 19370.30 -0.08 3496.52 0.08
9 1.6899 19370.26 0.11 3494.71 -0.10
10 1.6900 19370.11 0.00 3494.66 0.08
11 1.8371 17087.51 0.13 2881.33 0.00
12 1.8372 17085.52 -0.03 2881.10 -0.14
13 1.8372 17084.91 -0.02 2881.01 -0.20
14 1.8372 17084.13 -0.19 2880.96 -0.21
15 1.8563 16543.23 -0.10 2867.27 0.14
16 1.8563 16542.13 0.17 2867.23 0.11
17 1.8564 16541.43 -0.01 2867.42 0.31
18 1.8564 16541.27 -0.01 2866.94 -0.16
19 1.8675 16212.78 0.10 2867.50 -0.21
20 1.8676 16210.18 0.02 2867.70 -0.03
21 1.8676 16209.19 -0.06 2867.80 0.07
22 1.8677 16206.73 -0.03 2868.05 0.30
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.
17BQ236 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 44.016 44.068 43.964 ecceobj 0.198 0.200 0.196 incobj 20.536 20.536 20.536 qmin 33.730 33.583 33.699 qmax 54.845 54.937 54.629 amean 44.013 44.025 43.918 amin 43.602 43.592 43.486 amax 44.521 44.495 44.382 emean 0.211 0.213 0.208 emin 0.191 0.191 0.186 emax 0.233 0.236 0.231 imean 20.090 20.102 20.019 imin 19.274 19.288 19.192 imax 20.930 20.938 20.922 excite_mean 0.403 0.405 0.401 fracstop 1.000 1.000 1.000 cjmean 2.903 2.902 2.905 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 170.3 169.4 175.6 kozaiamp 180.0 180.0 180.0