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: 13UG18 # Created Wed Dec 25 02:09:44 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 36 observations of 36 # Arc: 6.23y # First observation: 2013/08/02 # Last observation: 2019/10/26 # Chi-squared of fit: 22.91 DOF: 66 RMS: 0.14 # Min/Max residuals: -0.25 0.55 # Exact a, adot, b, bdot, g, gdot: 1.495577E-05 2.178717E-02 -1.262295E-07 5.620527E-05 2.295620E-02 2.819407E-03 # Covariance matrix: 1.5703E-13 -6.1150E-14 4.1088E-16 -4.0350E-17 7.9322E-14 -4.5241E-13 -6.1150E-14 1.7760E-13 1.0701E-16 2.0829E-16 4.7724E-14 1.4826E-12 4.1088E-16 1.0701E-16 5.9300E-14 -1.9199E-14 5.0038E-16 7.2797E-16 -4.0350E-17 2.0829E-16 -1.9199E-14 2.0772E-14 7.9738E-17 1.9591E-15 7.9322E-14 4.7724E-14 5.0038E-16 7.9738E-17 1.1254E-13 3.9173E-13 -4.5241E-13 1.4826E-12 7.2797E-16 1.9591E-15 3.9173E-13 1.4051E-11 # lat0 lon0 xBary yBary zBary JD0 -0.931371 18.100921 0.942584 -0.006166 -0.381197 2456507.044298 # Heliocentric elements and errors Epoch: 2456506.5000 = 2013/08/02 Mean Anomaly: 73.20677 +/- 0.028 Argument of Peri: 192.58407 +/- 0.033 Long of Asc Node: 99.01148 +/- 0.023 Inclination: 0.93178 +/- 0.000 Eccentricity: 0.10659221 +/- 0.0002 Semi-Major Axis: 44.84832600 +/- 0.0038 Time of Perihelion: 2434198.1980 +/- 9.0 Perihelion: 40.06784369 +/- 0.0086 Aphelion: 49.62880832 +/- 0.0089 Period (y) 300.3499 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 42.05491901 +/- 0.0006 Ecliptic Y 12.75796582 +/- 0.0002 Ecliptic Z -0.70804298 +/- 0.0000 Ecliptic XDOT -0.00049386 +/- 0.0000 Ecliptic YDOT 0.00257350 +/- 0.0000 Ecliptic ZDOT 0.00000138 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.95312479 +/- 0.0006 Geocenter to KBO 43.56116751 +/- 0.0006 # Hcoef: 7.82
The following table shows the complete astrometric record for 13UG18. 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 (13UG18) followed by the observatory code and reference code for the source of the astrometry.
2013 08 02.54352 01 08 12.174 +06 14 16.30 24.4r 13UG18 568 C~2Rfu 2013 08 02.58624 01 08 12.126 +06 14 15.86 24.2r 13UG18 568 C~2Rfu 2013 08 30.47985 01 07 12.258 +06 07 37.90 24.2r 13UG18 568 C~2Rfv 2013 08 31.46342 01 07 09.214 +06 07 18.16 24.3r 13UG18 568 C~2Rfv 2013 08 31.52899 01 07 09.014 +06 07 16.92 24.7r 13UG18 568 C~2Rfv 2013 09 04.44319 01 06 56.320 +06 05 55.57 24.3r 13UG18 568 C~2Rfv 2013 09 04.51807 01 06 56.066 +06 05 54.48 24.1r 13UG18 568 C~2Rfv 2013 10 06.42466 01 04 49.551 +05 52 41.27 24.1r 13UG18 568 C~2Rfv 2013 10 09.55440 01 04 35.943 +05 51 17.09 24.4r 13UG18 568 C~2Rfv 2013 10 31.26631 01 03 03.930 +05 41 55.44 23.9r 13UG18 568 C~2Rfv 2013 10 31.30910 01 03 03.757 +05 41 54.44 23.8r 13UG18 568 C~2Rfv 2013 10 31.35182 01 03 03.583 +05 41 53.31 23.9r 13UG18 568 C~2Rfv 2013 11 01.29289 01 02 59.826 +05 41 30.69 23.8r 13UG18 568 C~2Rfv 2013 11 01.42381 01 02 59.313 +05 41 27.52 13UG18 568 C~2Rfv 2013 11 05.47053 01 02 43.531 +05 39 52.52 24.0r 13UG18 568 C~2Rfv 2013 11 07.44359 01 02 36.084 +05 39 08.03 24.3r 13UG18 568 C~2Rfv 2013 11 07.45135 01 02 36.040 +05 39 07.67 24.0r 13UG18 568 C~2Rfv 2013 11 07.48378 01 02 35.933 +05 39 07.32 23.8r 13UG18 568 C~2Rfv 2013 12 04.28292 01 01 15.832 +05 31 17.85 24.2r 13UG18 568 C~2Rfv 2013 12 04.33509 01 01 15.718 +05 31 17.44 24.4r 13UG18 568 C~2Rfv 2013 12 05.26092 01 01 13.811 +05 31 06.78 24.4r 13UG18 568 C~2Rfv 2014 06 27.60171 01 12 33.254 +06 41 51.99 24.6r 13UG18 568 C~2Rfv 2014 06 28.60677 01 12 35.166 +06 42 02.43 24.3r 13UG18 568 C~2Rfv 2014 07 24.56479 01 12 56.046 +06 43 35.03 24.5r 13UG18 568 C~2Rfv 2014 07 27.59560 01 12 54.853 +06 43 23.82 24.4r 13UG18 568 C~2Rfv 2014 08 23.57976 01 12 12.480 +06 38 34.08 24.3r 13UG18 568 C~2Rfv 2014 08 28.44260 01 11 59.306 +06 37 09.05 13UG18 568 C~2Rfv 2014 10 23.34848 01 08 19.330 +06 14 26.14 24.1r 13UG18 568 C~2Rfv 2014 10 27.38719 01 08 02.334 +06 12 43.25 24.3r 13UG18 568 C~2Rfv 2014 11 19.19777 01 06 36.734 +06 04 14.34 23.8r 13UG18 568 C~2Rfv 2014 11 19.26507 01 06 36.509 +06 04 12.94 24.3r 13UG18 568 C~2Rfv 2014 11 25.21441 01 06 18.454 +06 02 27.74 24.5r 13UG18 568 C~2Rfv 2015 01 18.22533 01 05 39.172 +05 59 39.40 24.0r 13UG18 568 C~2Rfv 2015 12 07.38190 01 10 27.140 +06 28 18.99 24.4w 13UG18 568 C~2Rfv 2019 10 26.229840 01 31 23.190 +08 34 04.77 24.5G 13UG18 G37 C~3clS 2019 10 26.321480 01 31 22.786 +08 34 02.52 13UG18 G37 C~3clS
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 -0.00 0.00 0.04
2 0.0001 0.00 0.04 0.00 -0.06
3 0.0765 0.00 -0.05 0.00 0.15
4 0.0792 0.00 0.04 0.00 0.02
5 0.0794 0.00 0.20 0.00 0.10
6 0.0901 0.00 0.16 0.00 0.04
7 0.0903 0.00 0.20 0.00 0.55
8 0.1776 0.00 -0.03 0.00 0.07
9 0.1862 0.00 -0.12 0.00 -0.25
10 0.2456 0.00 -0.02 0.00 -0.07
11 0.2458 0.00 0.00 0.00 -0.03
12 0.2459 0.00 0.01 0.00 -0.13
13 0.2485 0.00 -0.08 0.00 -0.08
14 0.2488 0.00 0.18 0.00 -0.11
15 0.2599 0.00 -0.01 0.00 -0.24
16 0.2653 0.00 0.01 0.00 -0.07
17 0.2653 0.00 -0.21 0.00 -0.25
18 0.2654 0.00 0.03 0.00 0.13
19 0.3388 0.00 -0.04 0.00 -0.25
20 0.3389 0.00 -0.04 0.00 -0.04
21 0.3415 0.00 -0.02 0.00 0.01
22 0.9009 0.00 -0.18 0.00 -0.09
23 0.9037 0.00 -0.19 0.00 0.00
24 0.9747 0.00 -0.04 0.00 0.06
25 0.9830 0.00 -0.03 0.00 0.06
26 1.0569 0.00 -0.24 0.00 -0.01
27 1.0702 0.00 -0.17 0.00 0.05
28 1.2233 0.00 0.18 0.00 0.15
29 1.2343 0.00 0.37 0.00 -0.10
30 1.2968 0.00 0.08 0.00 0.24
31 1.2970 0.00 0.02 0.00 0.11
32 1.3133 0.00 0.03 0.00 -0.13
33 1.4611 0.00 -0.01 0.00 0.20
34 2.3459 0.00 -0.11 0.00 0.04
35 6.2305 0.00 0.04 0.00 -0.06
36 6.2307 0.00 0.02 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.
13UG18 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 45.107 45.107 45.107 ecceobj 0.110 0.110 0.110 incobj 0.932 0.932 0.932 qmin 39.346 39.358 39.385 qmax 50.529 50.555 50.664 amean 44.831 44.832 44.832 amin 44.465 44.461 44.470 amax 45.221 45.225 45.248 emean 0.104 0.104 0.104 emin 0.089 0.089 0.089 emax 0.118 0.119 0.120 imean 1.120 1.121 1.121 imin 0.389 0.390 0.390 imax 1.668 1.672 1.668 excite_mean 0.106 0.106 0.106 fracstop 1.000 1.000 1.000 cjmean 3.098 3.098 3.098 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 173.7 173.7 173.5 kozaiamp 179.9 179.9 179.9