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: 13SK102 # Created Mon Apr 28 01:09:42 2025 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 33 observations of 33 # Arc: 5.16y # First observation: 2013/09/28 # Last observation: 2018/11/27 # Chi-squared of fit: 10.28 DOF: 60 RMS: 0.10 # Min/Max residuals: -0.43 0.15 # Exact a, adot, b, bdot, g, gdot: 1.513529E-05 1.683052E-02 5.672970E-07 1.045236E-03 2.054835E-02 2.003315E-03 # Covariance matrix: 1.8946E-13 -7.8521E-14 1.9366E-17 -3.1445E-15 6.8948E-14 -5.7078E-13 -7.8521E-14 1.5807E-13 -8.3657E-15 1.0646E-14 1.2603E-13 1.9512E-12 1.9366E-17 -8.3657E-15 1.3272E-13 -3.6416E-14 -1.3262E-14 -1.1449E-13 -3.1445E-15 1.0646E-14 -3.6416E-14 1.5535E-14 9.4317E-15 1.4494E-13 6.8948E-14 1.2603E-13 -1.3262E-14 9.4317E-15 3.6504E-13 1.7417E-12 -5.7078E-13 1.9512E-12 -1.1449E-13 1.4494E-13 1.7417E-12 2.6565E-11 # lat0 lon0 xBary yBary zBary JD0 -6.658528 4.894128 0.001254 -0.116121 -0.995525 2456563.624840 # Heliocentric elements and errors Epoch: 2456564.5000 = 2013/09/29 Mean Anomaly: 134.62225 +/- 0.072 Argument of Peri: 150.93464 +/- 0.068 Long of Asc Node: 66.43497 +/- 0.003 Inclination: 7.41205 +/- 0.000 Eccentricity: 0.18229673 +/- 0.0001 Semi-Major Axis: 43.48584327 +/- 0.0037 Time of Perihelion: 2417396.2085 +/- 21.6 Perihelion: 35.55851628 +/- 0.0072 Aphelion: 51.41317025 +/- 0.0079 Period (y) 286.7676 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 49.15948755 +/- 0.0014 Ecliptic Y 4.21134296 +/- 0.0001 Ecliptic Z -5.64286717 +/- 0.0002 Ecliptic XDOT 0.00008276 +/- 0.0000 Ecliptic YDOT 0.00225700 +/- 0.0000 Ecliptic ZDOT 0.00010752 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 49.66110457 +/- 0.0014 Geocenter to KBO 48.66567871 +/- 0.0014 # Hcoef: 6.04
The following table shows the complete astrometric record for 13SK102. 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 (13SK102) followed by the observatory code and reference code for the source of the astrometry.
2013 09 28.124062 00 28 32.27 -04 10 03.8 23.7g 13SK102 W84 C~35bY 2013 09 28.12458 00 28 32.299 -04 10 03.80 24.1g 13SK102 W84 C~4yR1 2013 09 28.13265 00 28 32.272 -04 10 03.86 22.7i 13SK102 W84 C~4yR1 2013 10 13.17502 00 27 33.967 -04 15 51.37 22.2i 13SK102 W84 C~4yR1 2013 10 13.17651 00 27 33.958 -04 15 51.34 22.6z 13SK102 W84 C~4yR1 2013 11 23.10450 00 25 27.690 -04 25 24.48 23.1r 13SK102 W84 C~4yR1 2013 11 23.13634 00 25 27.619 -04 25 24.59 22.7i 13SK102 W84 C~4yR1 2014 10 03.27155 00 31 39.690 -03 45 48.48 23.5r 13SK102 W84 C~4yR1 2014 11 14.061134 00 29 14.89 -03 58 15.5 22.8i 13SK102 W84 C~35bY 2014 11 14.06166 00 29 14.895 -03 58 15.45 22.6i 13SK102 W84 C~4yR1 2014 11 15.03684 00 29 12.330 -03 58 24.87 23.3r 13SK102 W84 C~4yR1 2014 11 17.062442 00 29 07.16 -03 58 43.1 22.7z 13SK102 W84 C~35bY 2014 11 17.06297 00 29 07.173 -03 58 43.26 22.4z 13SK102 W84 C~4yR1 2014 11 18.11963 00 29 04.571 -03 58 52.12 22.6z 13SK102 W84 C~4yR1 2016 09 09.17148 00 39 57.798 -02 43 49.48 22.6z 13SK102 W84 C~4yR1 2016 09 09.27364 00 39 57.435 -02 43 51.79 22.8r 13SK102 W84 C~4yR1 2016 09 09.27503 00 39 57.422 -02 43 51.90 22.9i 13SK102 W84 C~4yR1 2016 09 09.27641 00 39 57.418 -02 43 51.85 24.1g 13SK102 W84 C~4yR1 2016 11 07.10737 00 36 21.264 -03 05 04.13 22.4z 13SK102 W84 C~4yR1 2016 11 08.18412 00 36 17.981 -03 05 18.46 22.8i 13SK102 W84 C~4yR1 2016 11 18.152396 00 35 50.39 -03 07 07.3 22.4z 13SK102 W84 C~35bY 2016 11 18.15293 00 35 50.404 -03 07 07.47 22.3z 13SK102 W84 C~4yR1 2016 11 26.09648 00 35 32.453 -03 08 01.31 23.4r 13SK102 W84 C~4yR1 2016 11 26.09786 00 35 32.446 -03 08 01.27 24.3g 13SK102 W84 C~4yR1 2017 10 20.16631 00 40 46.654 -02 33 54.84 22.8i 13SK102 W84 C~4yR1 2017 10 22.15797 00 40 39.297 -02 34 34.66 22.9z 13SK102 W84 C~4yR1 2017 10 27.14514 00 40 21.310 -02 36 09.06 22.9z 13SK102 W84 C~4yR1 2017 10 28.17095 00 40 17.703 -02 36 27.36 21.6z 13SK102 W84 C~4yR1 2018 09 09.34244 00 46 43.749 -01 51 44.77 22.7r 13SK102 W84 C~4yR1 2018 09 09.34385 00 46 43.739 -01 51 44.90 23.6g 13SK102 W84 C~4yR1 2018 11 08.17671 00 43 04.150 -02 13 24.42 23.2r 13SK102 W84 C~4yR1 2018 11 08.17810 00 43 04.144 -02 13 24.40 22.8i 13SK102 W84 C~4yR1 2018 11 27.08173 00 42 14.329 -02 16 31.98 23.9g 13SK102 W84 C~4yR1
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 -0.43 0.00 -0.13
2 0.0000 0.00 0.03 0.00 -0.12
3 0.0000 0.00 0.11 0.00 0.02
4 0.0412 0.00 0.15 0.00 0.06
5 0.0412 0.00 0.10 0.00 0.12
6 0.1533 0.00 0.03 0.00 0.05
7 0.1534 0.00 -0.03 0.00 0.10
8 1.0134 0.00 0.10 0.00 -0.09
9 1.1278 0.00 -0.08 0.00 -0.01
10 1.1278 0.00 0.02 0.00 0.05
11 1.1305 0.00 0.01 0.00 0.10
12 1.1360 0.00 -0.12 0.00 0.11
13 1.1360 0.00 0.10 0.00 -0.04
14 1.1389 0.00 0.09 0.00 -0.15
15 2.9488 0.00 0.12 0.00 -0.20
16 2.9491 0.00 0.13 0.00 0.04
17 2.9491 0.00 0.01 0.00 -0.04
18 2.9491 0.00 0.03 0.00 0.04
19 3.1102 0.00 -0.02 0.00 -0.02
20 3.1131 0.00 -0.02 0.00 0.01
21 3.1404 0.00 -0.27 0.00 0.12
22 3.1404 0.00 -0.04 0.00 -0.04
23 3.1621 0.00 0.02 0.00 -0.02
24 3.1621 0.00 -0.04 0.00 0.03
25 4.0603 0.00 0.02 0.00 0.07
26 4.0658 0.00 0.09 0.00 0.06
27 4.0795 0.00 0.04 0.00 -0.02
28 4.0823 0.00 0.08 0.00 0.07
29 4.9479 0.00 -0.02 0.00 -0.01
30 4.9479 0.00 -0.09 0.00 -0.11
31 5.1117 0.00 0.02 0.00 0.01
32 5.1117 0.00 -0.01 0.00 0.05
33 5.1635 0.00 0.06 0.00 -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.
13SK102 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 43.711 43.711 43.711 ecceobj 0.178 0.178 0.178 incobj 7.412 7.412 7.412 qmin 34.802 34.213 34.133 qmax 53.329 54.065 54.120 amean 43.749 43.725 43.713 amin 43.183 43.159 43.163 amax 44.341 44.375 44.373 emean 0.179 0.189 0.193 emin 0.154 0.159 0.158 emax 0.205 0.219 0.220 imean 4.279 4.396 5.810 imin 1.601 2.525 4.018 imax 7.592 7.334 7.416 excite_mean 0.196 0.205 0.219 fracstop 1.000 1.000 1.000 cjmean 3.051 3.045 3.038 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 183.2 182.0 183.7 kozaiamp 180.0 180.0 180.0