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 Fri Nov 22 02:10:48 2024 # Orbit generated from Bernstein formalism # Fitting 26 observations of 26 # Arc: 2.37y # First observation: 2016/12/25 # Last observation: 2019/05/09 Preliminary a, adot, b, bdot, g, gdot: 0.000110 0.025619 0.000021 0.004008 0.025781 0.000000 # Chi-squared of fit: 14.28 DOF: 46 RMS: 0.13 # Min/Max residuals: -0.42 0.32 # Exact a, adot, b, bdot, g, gdot: 1.616964E-05 2.507064E-02 2.873357E-06 3.968134E-03 2.512526E-02 -7.187797E-03 # Covariance matrix: 2.9033E-13 8.4565E-13 3.3028E-14 1.6266E-13 9.2396E-13 1.8588E-11 8.4565E-13 4.0129E-12 1.2359E-13 8.2652E-13 3.7956E-12 9.1787E-11 3.3028E-14 1.2359E-13 7.5074E-14 -1.4012E-14 1.3636E-13 2.4293E-12 1.6266E-13 8.2652E-13 -1.4012E-14 2.7991E-13 7.2670E-13 2.1247E-11 9.2396E-13 3.7956E-12 1.3636E-13 7.2670E-13 3.9002E-12 8.2370E-11 1.8588E-11 9.1787E-11 2.4293E-12 2.1247E-11 8.2370E-11 2.3145E-09 # lat0 lon0 xBary yBary zBary JD0 -10.183227 151.169717 0.832290 -0.093674 -0.522600 2457748.016476 # Heliocentric elements and errors Epoch: 2457740.5000 = 2016/12/18 Mean Anomaly: 310.87030 +/- 0.124 Argument of Peri: 34.84043 +/- 0.046 Long of Asc Node: 198.25509 +/- 0.002 Inclination: 13.35391 +/- 0.001 Eccentricity: 0.31845531 +/- 0.0020 Semi-Major Axis: 46.40436172 +/- 0.0673 Time of Perihelion: 2473497.6708 +/- 20.2 Perihelion: 31.62664624 +/- 0.1027 Aphelion: 61.18207720 +/- 0.1277 Period (y) 316.1159 +/- 0.69 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -34.38563204 +/- 0.0027 Ecliptic Y 19.87088170 +/- 0.0015 Ecliptic Z -7.03653528 +/- 0.0006 Ecliptic XDOT -0.00070643 +/- 0.0000 Ecliptic YDOT -0.00273488 +/- 0.0000 Ecliptic ZDOT 0.00056401 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 40.33282112 +/- 0.0024 Geocenter to KBO 39.80058213 +/- 0.0031 # Hcoef: 9.50
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.
2016 12 25.515687 09 58 25.17 +01 31 24.3 17BK230 T09 C~81Bm 2016 12 25.543579 09 58 25.12 +01 31 24.3 17BK230 T09 C~81Bm 2016 12 25.590361 09 58 24.99 +01 31 24.5 17BK230 T09 C~81Bm 2016 12 25.612638 09 58 24.92 +01 31 24.6 17BK230 T09 C~81Bm 2017 01 02.594573 09 58 02.78 +01 31 57.8 17BK230 T09 C~81Bm 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 2019 02 05.422693 10 07 29.48 +01 05 10.7 17BK230 T09 C~81Bm 2019 05 09.263698 10 02 18.19 +01 49 26.1 17BK230 T09 C~81Bm 2019 05 09.338919 10 02 18.18 +01 49 27.5 17BK230 T09 C~81Bm 2019 05 09.385989 10 02 18.16 +01 49 28.3 17BK230 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 -0.08 0.00 -0.08
2 0.0001 -0.70 0.23 -0.26 -0.01
3 0.0002 -2.60 0.03 -0.75 0.04
4 0.0003 -3.62 -0.18 -1.03 0.03
5 0.0221 -326.35 -0.00 -85.63 -0.03
6 0.0738 -1382.93 0.08 -236.81 0.08
7 0.0739 -1384.72 0.01 -237.16 -0.10
8 0.0740 -1386.44 0.02 -237.26 -0.05
9 0.0790 -1506.49 0.03 -247.42 0.08
10 0.0790 -1507.22 0.04 -247.59 -0.03
11 0.0791 -1508.63 0.16 -247.69 0.01
12 0.0791 -1510.21 -0.16 -247.74 0.06
13 0.0792 -1512.67 -0.07 -248.01 0.01
14 0.0793 -1514.91 -0.12 -248.42 -0.21
15 0.0794 -1517.02 0.11 -248.35 0.06
16 0.0794 -1517.58 0.01 -248.13 0.32
17 0.0796 -1522.04 -0.06 -248.62 0.21
18 0.0983 -1993.80 -0.04 -279.60 -0.03
19 0.0984 -1997.00 -0.03 -279.62 0.14
20 0.0986 -2002.44 -0.38 -280.46 -0.42
21 0.0988 -2006.48 0.14 -280.36 -0.07
22 0.0988 -2007.92 0.28 -280.37 0.01
23 2.1134 8202.84 -0.01 1375.18 -0.06
24 2.3676 2897.30 0.01 2232.80 0.04
25 2.3678 2896.68 0.07 2234.06 0.07
26 2.3679 2896.11 -0.07 2234.70 -0.06
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:2 Type: CENTAURR CENTAURR SCATNEAR axisobj 46.031 46.187 45.878 ecceobj 0.312 0.317 0.307 incobj 13.393 13.394 13.393 qmin 29.413 28.987 30.371 qmax 64.454 64.648 63.615 amean 44.815 44.998 40.980 amin 42.447 39.876 39.398 amax 47.644 47.650 47.359 emean 0.308 0.324 0.200 emin 0.260 0.258 0.144 emax 0.353 0.362 0.343 imean 12.915 11.236 10.211 imin 11.279 8.856 6.574 imax 14.535 13.566 14.047 excite_mean 0.381 0.379 0.269 fracstop 0.382 0.298 1.000 cjmean 2.939 2.942 2.983 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 180.4 168.8 176.7 kozaiamp 179.9 179.8 180.0