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: 17BK230 # Created Mon May 6 01:17:57 2024 # Orbit generated from Bernstein formalism # Fitting 17 observations of 17 # Arc: 9.13d # First observation: 2017/01/21 # Last observation: 2017/01/30 Preliminary a, adot, b, bdot, g, gdot: 0.000000 0.027774 0.000000 0.004153 0.025821 0.000000 # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # WARNING Fitting with energy constraint # Chi-squared of fit: 11.49 DOF: 29 RMS: 0.15 # Min/Max residuals: -0.38 0.28 # Exact a, adot, b, bdot, g, gdot: 1.448364E-05 2.288989E-02 2.135296E-06 3.749511E-03 2.493440E-02 -9.744030E-03 # Covariance matrix: 5.3908E-12 9.9869E-09 1.0101E-12 8.1846E-10 1.7355E-09 2.3474E-08 9.9869E-09 1.9216E-05 1.9384E-09 1.5732E-06 3.3340E-06 4.1212E-05 1.0101E-12 1.9384E-09 3.6656E-13 1.4983E-10 3.3643E-10 4.3314E-09 8.1846E-10 1.5732E-06 1.4983E-10 1.2973E-07 2.7297E-07 3.3834E-06 1.7355E-09 3.3340E-06 3.3643E-10 2.7297E-07 5.7855E-07 7.2671E-06 2.3474E-08 4.1212E-05 4.3314E-09 3.3834E-06 7.2671E-06 2.9520E-04 # lat0 lon0 xBary yBary zBary JD0 -10.248775 150.779347 0.488178 -0.152227 -0.842962 2457774.982951 # Heliocentric elements and errors Epoch: 2457770.5000 = 2017/01/17 Mean Anomaly: 301.46519 +/- 61.079 Argument of Peri: 57.87347 +/- 33.155 Long of Asc Node: 196.93633 +/- 3.251 Inclination: 13.63483 +/- 0.711 Eccentricity: 0.40249113 +/- 0.6564 Semi-Major Axis: 43.60183637 +/- 22.2936 Time of Perihelion: 2474869.3655 +/- 12098.1 Perihelion: 26.05248407 +/- 31.5675 Aphelion: 61.15118868 +/- 42.3871 Period (y) 287.9157 +/- 220.82 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -34.95611958 +/- 1.0507 Ecliptic Y 20.10561158 +/- 0.5878 Ecliptic Z -7.13556872 +/- 0.2177 Ecliptic XDOT -0.00036921 +/- 0.0018 Ecliptic YDOT -0.00267844 +/- 0.0008 Ecliptic ZDOT 0.00059544 +/- 0.0003 # Distances at JD0 (AU) Heliocenter to KBO 40.95219474 +/- 0.9429 Geocenter to KBO 40.10523177 +/- 1.2234 # Hcoef: 9.44
The following table shows the complete astrometric record for 17BK230. 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 (17BK230) followed by the observatory code and reference code for the source of the astrometry.
2017 01 21.48215 09 56 53.22 +01 35 44.3 25.1z 17BK230 T09 C~7ujA 2017 01 21.50822 09 56 53.10 +01 35 44.6 25.3z 17BK230 T09 C~7ujA 2017 01 21.53429 09 56 52.99 +01 35 45.1 25.1z 17BK230 T09 C~7ujA 2017 01 23.36023 09 56 45.25 +01 36 17.4 25.7r 17BK230 T09 C~7ujA 2017 01 23.37134 09 56 45.20 +01 36 17.5 25.6r 17BK230 T09 C~7ujA 2017 01 23.39391 09 56 45.11 +01 36 17.9 25.7r 17BK230 T09 C~7ujA 2017 01 23.41253 09 56 45.01 +01 36 18.4 25.3r 17BK230 T09 C~7ujA 2017 01 23.45024 09 56 44.85 +01 36 19.0 25.9r 17BK230 T09 C~7ujA 2017 01 23.48266 09 56 44.70 +01 36 19.4 25.3i 17BK230 T09 C~7ujA 2017 01 23.51704 09 56 44.57 +01 36 20.2 25.3i 17BK230 T09 C~7ujA 2017 01 23.52381 09 56 44.54 +01 36 20.6 25.6i 17BK230 T09 C~7ujA 2017 01 23.58838 09 56 44.25 +01 36 21.7 25.1i 17BK230 T09 C~7ujA 2017 01 30.41352 09 56 14.04 +01 38 37.0 25.3i 17BK230 T09 C~7ujA 2017 01 30.45764 09 56 13.84 +01 38 38.1 25.7i 17BK230 T09 C~7ujA 2017 01 30.52778 09 56 13.48 +01 38 39.2 25.6z 17BK230 T09 C~7ujA 2017 01 30.59058 09 56 13.23 +01 38 40.7 24.9z 17BK230 T09 C~7ujA 2017 01 30.61243 09 56 13.14 +01 38 41.2 25.0z 17BK230 T09 C~7ujA
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 0.01 0.00 0.05
2 0.0001 -1.79 -0.05 -0.34 -0.13
3 0.0001 -3.51 -0.04 -0.45 -0.07
4 0.0051 -123.56 0.05 -10.46 0.04
5 0.0052 -124.30 0.06 -10.63 -0.06
6 0.0052 -125.70 0.18 -10.72 -0.03
7 0.0053 -127.28 -0.14 -10.77 0.03
8 0.0054 -129.74 -0.05 -11.04 -0.03
9 0.0055 -131.99 -0.09 -11.45 -0.25
10 0.0056 -134.09 0.13 -11.38 0.03
11 0.0056 -134.66 0.03 -11.16 0.28
12 0.0058 -139.11 -0.04 -11.64 0.18
13 0.0245 -610.88 -0.03 -42.05 0.04
14 0.0246 -614.07 -0.03 -42.06 0.20
15 0.0248 -619.52 -0.38 -42.90 -0.36
16 0.0249 -623.55 0.13 -42.79 -0.01
17 0.0250 -624.99 0.27 -42.79 0.08
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.
17BK230 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0