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: 15KU418 # Created Tue Apr 1 01:10:30 2025 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 45 observations of 45 # Arc: 5.02y # First observation: 2011/06/02 # Last observation: 2016/06/07 # Chi-squared of fit: 18.50 DOF: 84 RMS: 0.11 # Min/Max residuals: -0.25 0.28 # Exact a, adot, b, bdot, g, gdot: 1.900070E-05 3.333227E-02 -2.510733E-06 -4.302639E-03 2.837081E-02 2.947560E-03 # Covariance matrix: 7.3257E-13 -3.1925E-13 -1.2607E-14 2.2474E-14 -1.2781E-13 -1.0318E-12 -3.1925E-13 5.5129E-13 4.5437E-14 -7.5074E-14 6.6748E-13 3.4221E-12 -1.2607E-14 4.5437E-14 6.2753E-13 -1.4737E-13 6.5191E-14 3.0991E-13 2.2474E-14 -7.5074E-14 -1.4737E-13 4.4599E-14 -1.0417E-13 -5.0690E-13 -1.2781E-13 6.6748E-13 6.5191E-14 -1.0417E-13 1.0814E-12 4.7325E-12 -1.0318E-12 3.4221E-12 3.0991E-13 -5.0690E-13 4.7325E-12 2.3083E-11 # lat0 lon0 xBary yBary zBary JD0 16.400549 -148.626211 -0.650601 0.220151 -0.748226 2455714.942835 # Heliocentric elements and errors Epoch: 2455714.5000 = 2011/06/02 Mean Anomaly: 13.81376 +/- 0.018 Argument of Peri: 88.22277 +/- 0.036 Long of Asc Node: 96.55845 +/- 0.001 Inclination: 17.73320 +/- 0.000 Eccentricity: 0.30217242 +/- 0.0001 Semi-Major Axis: 50.32059485 +/- 0.0066 Time of Perihelion: 2450711.5446 +/- 6.5 Perihelion: 35.11509910 +/- 0.0053 Aphelion: 65.52609061 +/- 0.0090 Period (y) 356.9660 +/- 0.07 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -29.19235876 +/- 0.0011 Ecliptic Y -18.56576525 +/- 0.0006 Ecliptic Z 9.95212286 +/- 0.0004 Ecliptic XDOT 0.00133929 +/- 0.0000 Ecliptic YDOT -0.00294358 +/- 0.0000 Ecliptic ZDOT -0.00031796 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 35.99890518 +/- 0.0009 Geocenter to KBO 35.24747428 +/- 0.0013 # Hcoef: 7.87
The following table shows the complete astrometric record for 15KU418. 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 (15KU418) followed by the observatory code and reference code for the source of the astrometry.
2011 06 02.442069 14 19 26.50 +03 27 43.4 15KU418 T14 C~8Zkf 2011 06 02.469474 14 19 26.40 +03 27 43.4 15KU418 T14 C~8Zkf 2015 05 17.41541 14 47 41.72 -00 04 15.0 23.9g 15KU418 T09 C~8SVz 2015 05 17.46513 14 47 41.46 -00 04 14.2 23.9g 15KU418 T09 C~8SVz 2015 05 17.47362 14 47 41.43 -00 04 14.3 24.3g 15KU418 T09 C~8SVz 2015 05 17.48424 14 47 41.36 -00 04 14.0 24.0g 15KU418 T09 C~8SVz 2015 05 17.49483 14 47 41.31 -00 04 14.0 24.2g 15KU418 T09 C~8SVz 2015 05 21.38219 14 47 21.82 -00 03 24.6 23.1i 15KU418 T09 C~8SVz 2015 05 21.39026 14 47 21.80 -00 03 24.6 23.2i 15KU418 T09 C~8SVz 2015 05 21.39564 14 47 21.77 -00 03 24.5 23.1i 15KU418 T09 C~8SVz 2015 05 21.39833 14 47 21.74 -00 03 24.5 23.2i 15KU418 T09 C~8SVz 2015 05 21.42256 14 47 21.62 -00 03 24.1 23.1i 15KU418 T09 C~8SVz 2015 05 26.30189 14 46 57.83 -00 02 34.7 22.6y 15KU418 T09 C~8SVz 2015 05 26.31657 14 46 57.78 -00 02 34.7 22.8y 15KU418 T09 C~8SVz 2015 05 26.36079 14 46 57.55 -00 02 34.2 22.7y 15KU418 T09 C~8SVz 2015 05 26.36367 14 46 57.53 -00 02 34.4 23.0y 15KU418 T09 C~8SVz 2015 05 26.45673 14 46 57.08 -00 02 33.4 23.2y 15KU418 T09 C~8SVz 2015 05 26.46835 14 46 57.02 -00 02 33.6 22.8y 15KU418 T09 C~8SVz 2015 07 12.28324 14 44 21.55 -00 07 26.0 22.8z 15KU418 T09 C~8SVz 2015 07 12.29403 14 44 21.54 -00 07 26.5 23.0z 15KU418 T09 C~8SVz 2015 07 12.30211 14 44 21.52 -00 07 26.5 23.0z 15KU418 T09 C~8SVz 2015 07 12.33461 14 44 21.46 -00 07 27.2 23.7z 15KU418 T09 C~8SVz 2015 07 12.34809 14 44 21.45 -00 07 27.5 23.1z 15KU418 T09 C~8SVz 2015 07 12.35348 14 44 21.44 -00 07 27.5 23.1z 15KU418 T09 C~8SVz 2016 03 09.63261 14 59 13.30 -01 24 37.1 23.6r 15KU418 T09 C~8Zkf 2016 03 09.63687 14 59 13.28 -01 24 36.9 23.5r 15KU418 T09 C~8Zkf 2016 03 09.63900 14 59 13.28 -01 24 36.7 23.7r 15KU418 T09 C~8Zkf 2016 03 12.53503 14 59 06.51 -01 23 14.1 23.3z 15KU418 T09 C~8eSO 2016 03 12.55413 14 59 06.46 -01 23 13.6 23.6z 15KU418 T09 C~8eSO 2016 03 12.58656 14 59 06.40 -01 23 12.5 23.4z 15KU418 T09 C~8eSO 2016 03 12.60279 14 59 06.35 -01 23 12.3 23.5z 15KU418 T09 C~8eSO 2016 03 12.60817 14 59 06.33 -01 23 11.9 23.7z 15KU418 T09 C~8eSO 2016 03 12.61900 14 59 06.31 -01 23 11.6 23.9z 15KU418 T09 C~8eSO 2016 03 12.64062 14 59 06.25 -01 23 11.1 23.2z 15KU418 T09 C~8eSO 2016 03 15.54539 14 58 58.67 -01 21 47.1 23.4y 15KU418 T09 C~8eSO 2016 03 15.56451 14 58 58.60 -01 21 46.3 23.3y 15KU418 T09 C~8eSO 2016 03 15.58075 14 58 58.57 -01 21 45.9 23.4y 15KU418 T09 C~8eSO 2016 03 15.61316 14 58 58.48 -01 21 44.9 23.8y 15KU418 T09 C~8eSO 2016 03 15.61855 14 58 58.45 -01 21 44.9 23.4y 15KU418 T09 C~8eSO 2016 04 04.57104 14 57 47.93 -01 11 59.1 24.2g 15KU418 T09 C~8eSO 2016 04 04.59952 14 57 47.79 -01 11 58.3 24.4g 15KU418 T09 C~8eSO 2016 04 04.61436 14 57 47.71 -01 11 57.8 24.9g 15KU418 T09 C~8eSO 2016 04 04.62494 14 57 47.67 -01 11 57.6 24.6g 15KU418 T09 C~8eSO 2016 04 09.276792 14 57 27.379 -01 09 44.96 23.5r 15KU418 W84 C~8Zkf 2016 06 07.470109 14 52 36.56 -00 53 02.3 15KU418 T09 C~8Zkf
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 -0.07 0.00 0.05
2 0.0001 0.00 0.14 0.00 0.04
3 3.9561 0.00 -0.04 0.00 -0.04
4 3.9563 0.00 -0.09 0.00 0.08
5 3.9563 0.00 0.11 0.00 -0.14
6 3.9563 0.00 -0.12 0.00 0.01
7 3.9563 0.00 -0.05 0.00 -0.13
8 3.9670 0.00 -0.11 0.00 -0.03
9 3.9670 0.00 0.21 0.00 -0.12
10 3.9670 0.00 0.16 0.00 -0.08
11 3.9670 0.00 -0.08 0.00 -0.11
12 3.9671 0.00 -0.05 0.00 0.01
13 3.9805 0.00 -0.10 0.00 0.08
14 3.9805 0.00 0.23 0.00 -0.05
15 3.9806 0.00 0.01 0.00 0.07
16 3.9806 0.00 -0.07 0.00 -0.16
17 3.9809 0.00 -0.02 0.00 0.04
18 3.9809 0.00 -0.07 0.00 -0.25
19 4.1091 0.00 -0.01 0.00 0.16
20 4.1091 0.00 0.08 0.00 -0.11
21 4.1091 0.00 -0.04 0.00 0.06
22 4.1092 0.00 -0.21 0.00 0.04
23 4.1093 0.00 -0.05 0.00 0.02
24 4.1093 0.00 -0.08 0.00 0.14
25 4.7699 0.00 0.10 0.00 -0.09
26 4.7699 0.00 -0.05 0.00 -0.01
27 4.7699 0.00 0.02 0.00 0.13
28 4.7778 0.00 -0.14 0.00 0.06
29 4.7779 0.00 -0.15 0.00 0.01
30 4.7779 0.00 0.20 0.00 0.18
31 4.7780 0.00 0.07 0.00 -0.09
32 4.7780 0.00 -0.02 0.00 0.16
33 4.7780 0.00 0.10 0.00 0.15
34 4.7781 0.00 0.03 0.00 0.02
35 4.7860 0.00 0.03 0.00 -0.08
36 4.7861 0.00 -0.21 0.00 0.17
37 4.7861 0.00 0.04 0.00 0.09
38 4.7862 0.00 0.07 0.00 0.15
39 4.7862 0.00 -0.15 0.00 -0.01
40 4.8409 0.00 0.28 0.00 0.01
41 4.8410 0.00 0.03 0.00 -0.01
42 4.8410 0.00 -0.21 0.00 0.06
43 4.8410 0.00 -0.12 0.00 -0.04
44 4.8538 0.00 0.20 0.00 -0.07
45 5.0158 0.00 0.04 0.00 -0.23
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.
15KU418 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 50.199 50.199 50.199 ecceobj 0.301 0.301 0.301 incobj 17.732 17.732 17.732 qmin 34.614 34.512 34.595 qmax 67.511 67.505 67.410 amean 50.654 50.653 50.641 amin 50.125 50.118 50.123 amax 51.331 51.304 51.278 emean 0.299 0.300 0.299 emin 0.282 0.282 0.280 emax 0.316 0.317 0.315 imean 16.575 16.536 16.529 imin 15.877 15.797 15.825 imax 17.354 17.232 17.288 excite_mean 0.413 0.414 0.413 fracstop 1.000 1.000 1.000 cjmean 2.967 2.967 2.968 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 177.0 176.7 177.6 kozaiamp 180.0 180.0 180.0