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: 15KQ166 # Created Fri Jan 24 02:10:49 2025 # Orbit generated from Bernstein formalism # Fitting 22 observations of 22 # Arc: 55.93d # First observation: 2015/05/17 # Last observation: 2015/07/12 Preliminary a, adot, b, bdot, g, gdot: -0.000004 0.034832 -0.000011 -0.008876 0.030285 0.000000 # Chi-squared of fit: 2.77 DOF: 38 RMS: 0.06 # Min/Max residuals: -0.17 0.16 # Exact a, adot, b, bdot, g, gdot: 1.597360E-05 2.987302E-02 -5.714419E-06 -1.031922E-02 2.952542E-02 -9.705256E-03 # Covariance matrix: 2.5485E-13 2.5123E-11 -2.3356E-14 5.6882E-12 6.6633E-12 1.5614E-10 2.5123E-11 3.0348E-08 -5.6169E-11 8.5287E-09 5.0742E-09 -5.4803E-07 -2.3356E-14 -5.6169E-11 2.1556E-13 -1.6921E-11 -8.9412E-12 1.1372E-09 5.6882E-12 8.5287E-09 -1.6921E-11 2.4354E-09 1.3972E-09 -1.6206E-07 6.6633E-12 5.0742E-09 -8.9412E-12 1.3972E-09 8.9177E-10 -8.0152E-08 1.5614E-10 -5.4803E-07 1.1372E-09 -1.6206E-07 -8.0152E-08 1.3001E-05 # lat0 lon0 xBary yBary zBary JD0 14.377794 -139.758778 -0.276519 0.241180 -0.940472 2457159.910491 # Heliocentric elements and errors Epoch: 2457150.5000 = 2015/05/08 Mean Anomaly: 306.86000 +/- 8.917 Argument of Peri: 229.38974 +/- 0.740 Long of Asc Node: 75.38437 +/- 0.246 Inclination: 23.63185 +/- 0.131 Eccentricity: 0.30015908 +/- 0.1169 Semi-Major Axis: 38.97249245 +/- 3.2932 Time of Perihelion: 2470268.1106 +/- 1442.4 Perihelion: 27.27454493 +/- 5.1044 Aphelion: 50.67043997 +/- 6.2511 Period (y) 243.3019 +/- 30.84 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -25.60911176 +/- 0.0253 Ecliptic Y -22.03305992 +/- 0.0214 Ecliptic Z 8.41006164 +/- 0.0085 Ecliptic XDOT 0.00227073 +/- 0.0003 Ecliptic YDOT -0.00171095 +/- 0.0002 Ecliptic ZDOT -0.00115031 +/- 0.0001 # Distances at JD0 (AU) Heliocenter to KBO 34.81395513 +/- 0.0231 Geocenter to KBO 33.86912014 +/- 0.0343 # Hcoef: 8.64
The following table shows the complete astrometric record for 15KQ166. 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 (15KQ166) followed by the observatory code and reference code for the source of the astrometry.
2015 05 17.409713 14 49 12.879 -01 12 31.36 24.6g 15KQ166 568 C~2TuP 2015 05 17.473611 14 49 12.512 -01 12 30.44 24.7g 15KQ166 568 C~2TuP 2015 05 17.482101 14 49 12.472 -01 12 30.36 24.3g 15KQ166 568 C~2TuP 2015 05 17.490569 14 49 12.420 -01 12 30.34 24.5g 15KQ166 568 C~2TuP 2015 05 17.496936 14 49 12.386 -01 12 30.41 24.5g 15KQ166 568 C~2TuP 2015 05 21.378768 14 48 51.100 -01 11 42.83 23.7i 15KQ166 568 C~2TuP 2015 05 21.387551 14 48 51.046 -01 11 42.73 23.8i 15KQ166 568 C~2TuP 2015 05 21.395625 14 48 51.004 -01 11 42.67 23.8i 15KQ166 568 C~2TuP 2015 05 21.403709 14 48 50.962 -01 11 42.56 23.7i 15KQ166 568 C~2TuP 2015 05 21.411781 14 48 50.918 -01 11 42.43 23.8i 15KQ166 568 C~2TuP 2015 05 21.419852 14 48 50.868 -01 11 42.36 23.7i 15KQ166 568 C~2TuP 2015 05 21.422549 14 48 50.854 -01 11 42.35 23.7i 15KQ166 568 C~2TuP 2015 05 26.36079 14 48 24.46 -01 10 54.8 23.2y 15KQ166 T09 C~8SVs 2015 05 26.43645 14 48 24.06 -01 10 54.1 23.6y 15KQ166 T09 C~8SVs 2015 05 26.44517 14 48 24.00 -01 10 54.1 23.6y 15KQ166 T09 C~8SVs 2015 05 26.47128 14 48 23.88 -01 10 53.8 24.0y 15KQ166 T09 C~8SVs 2015 07 12.25545 14 45 29.60 -01 16 15.5 23.8z 15KQ166 T09 C~8SVs 2015 07 12.27784 14 45 29.56 -01 16 16.0 23.9z 15KQ166 T09 C~8SVs 2015 07 12.31304 14 45 29.50 -01 16 16.7 24.3z 15KQ166 T09 C~8SVs 2015 07 12.32923 14 45 29.47 -01 16 16.9 24.2z 15KQ166 T09 C~8SVs 2015 07 12.33461 14 45 29.46 -01 16 17.2 24.5z 15KQ166 T09 C~8SVs 2015 07 12.34270 14 45 29.45 -01 16 17.4 24.2z 15KQ166 T09 C~8SVs
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 0.04
2 0.0002 -5.52 -0.11 -0.79 0.07
3 0.0002 -6.12 0.01 -0.90 0.08
4 0.0002 -6.87 -0.03 -1.12 -0.03
5 0.0002 -7.33 0.05 -1.34 -0.17
6 0.0109 -325.92 0.05 -52.96 0.02
7 0.0109 -326.73 -0.02 -53.11 -0.01
8 0.0109 -327.34 0.02 -53.25 -0.02
9 0.0109 -327.98 0.06 -53.33 0.01
10 0.0110 -328.65 0.05 -53.41 0.05
11 0.0110 -329.38 -0.02 -53.57 0.01
12 0.0110 -329.58 0.00 -53.62 -0.01
13 0.0245 -721.15 -0.03 -128.56 -0.06
14 0.0247 -727.08 0.02 -129.71 0.04
15 0.0247 -727.94 -0.15 -129.98 -0.09
16 0.0248 -729.74 0.10 -130.24 0.08
17 0.1529 -3122.23 -0.04 -1231.13 -0.07
18 0.1530 -3122.65 -0.02 -1231.79 -0.07
19 0.1531 -3123.30 0.01 -1232.73 0.01
20 0.1531 -3123.67 -0.04 -1233.05 0.16
21 0.1531 -3123.72 0.01 -1233.38 -0.02
22 0.1531 -3123.80 0.08 -1233.62 -0.02
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.
15KQ166 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