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: 20108 # Created Sun Apr 21 01:07:01 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 48 observations of 48 # Arc: 26.26y # First observation: 1995/08/29 # Last observation: 2021/12/01 # Chi-squared of fit: 438.03 DOF: 90 RMS: 0.53 # Min/Max residuals: -1.13 1.83 # Exact a, adot, b, bdot, g, gdot: 1.683525E-05 3.133185E-02 -6.685946E-06 -1.113469E-02 2.955204E-02 3.265357E-03 # Covariance matrix: 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 # lat0 lon0 xBary yBary zBary JD0 -0.632590 10.690077 0.569919 -0.009189 -0.827072 2449959.040718 # Heliocentric elements and errors Epoch: 2449958.5000 = 1995/08/29 Mean Anomaly: 29.53896 +/- 0.000 Argument of Peri: 142.36401 +/- 0.000 Long of Asc Node: 187.99731 +/- 0.000 Inclination: 19.56306 +/- 0.000 Eccentricity: 0.14850248 +/- 0.0000 Semi-Major Axis: 39.51724666 +/- 0.0000 Time of Perihelion: 2442513.3890 +/- 0.0 Perihelion: 33.64883744 +/- 0.0000 Aphelion: 45.38565589 +/- 0.0000 Period (y) 248.4210 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 34.17037464 +/- 0.0000 Ecliptic Y 5.86297068 +/- 0.0000 Ecliptic Z -0.37381527 +/- 0.0000 Ecliptic XDOT -0.00024497 +/- 0.0000 Ecliptic YDOT 0.00290686 +/- 0.0000 Ecliptic ZDOT -0.00103504 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 34.67167631 +/- 0.0000 Geocenter to KBO 33.83858398 +/- 0.0000 # Hcoef: 7.73
The following table shows the complete astrometric record for 20108. 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 (20108) followed by the observatory code and reference code for the source of the astrometry.
1995 08 29.54001 00 40 17.84 +03 38 58.1 22.5R 20108 568 C26263 1995 08 29.57501 00 40 17.68 +03 38 56.7 20108 568 C26263 1995 08 29.61025 00 40 17.54 +03 38 55.7 20108 568 C26263 1995 08 30.49491 00 40 14.02 +03 38 26.8 20108 568 C26263 1995 08 30.52679 00 40 13.89 +03 38 25.6 20108 568 C26263 1995 08 31.51940 00 40 09.78 +03 37 51.8 20108 568 C26263 1995 08 31.62787 00 40 09.32 +03 37 47.4 20108 568 C26263 1995 10 24.3414 00 35 44.50 +03 03 22.7 20108 568 C26263 1995 10 24.3530 00 35 44.45 +03 03 21.8 20108 568 C26263 1995 10 24.3646 00 35 44.39 +03 03 21.6 20108 568 C26263 1995 10 24.4601 00 35 43.93 +03 03 18.2 20108 568 C26263 1995 10 24.4715 00 35 43.88 +03 03 17.3 20108 568 C26263 1995 10 26.2365 00 35 35.63 +03 02 13.1 20108 568 C26263 1995 10 26.2691 00 35 35.47 +03 02 11.8 20108 568 C26263 1995 10 26.2790 00 35 35.43 +03 02 11.3 20108 568 C26263 1995 10 26.2888 00 35 35.35 +03 02 10.7 20108 568 C26263 1995 10 26.3314 00 35 35.15 +03 02 09.4 20108 568 C26263 1995 10 26.3414 00 35 35.09 +03 02 09.1 20108 568 C26263 1995 10 26.3578 00 35 35.04 +03 02 08.6 20108 568 C26263 1995 12 23.26757 00 33 11.22 +02 41 22.5 20108 568 C26491 1995 12 23.37448 00 33 11.24 +02 41 22.5 20108 568 C26491 1995 12 24.25813 00 33 11.61 +02 41 20.4 20108 568 C26491 1995 12 24.29281 00 33 11.63 +02 41 20.5 20108 568 C26491 1996 08 16.16416 00 48 37.03 +03 52 07.5 20108 950 C27881 1996 08 16.18550 00 48 36.96 +03 52 07.0 20108 950 C27881 1996 08 16.20012 00 48 36.92 +03 52 06.7 20108 950 C27881 1996 08 16.21527 00 48 36.88 +03 52 06.3 20108 950 C27881 1996 08 16.46712 00 48 36.12 +03 51 59.4 23. R 20108 568 C27786 1996 08 16.51816 00 48 35.97 +03 51 58.2 20108 568 C27786 1996 08 17.13093 00 48 34.18 +03 51 41.5 20108 950 C27881 1996 08 17.15263 00 48 34.10 +03 51 40.9 20108 950 C27881 1996 09 05.35780 00 47 22.85 +03 41 29.8 22.3R 20108 675 C27801 1996 09 05.39106 00 47 22.70 +03 41 28.6 20108 675 C27801 1997 09 08.46282 00 54 45.25 +03 46 29.2 20108 675 C30579 1997 09 08.50934 00 54 45.03 +03 46 27.5 20108 675 C30579 1997 09 24.44722 00 53 29.28 +03 36 24.3 20108 568 Ca0008 1997 09 24.54309 00 53 28.79 +03 36 20.5 20108 568 Ca0008 2000 11 28.20325 01 10 59.95 +03 19 27.5 23.6R 20108 695 Cc3476 2000 11 29.17169 01 10 57.04 +03 19 09.6 23.3R 20108 695 Cc3476 2000 11 29.20120 01 10 56.88 +03 19 07.9 23.4R 20108 695 Cc3476 2000 11 29.27023 01 10 56.72 +03 19 06.5 20108 695 Cc3476 2008 12 21.21287 02 07 15.67 +03 53 16.5 22.6r 20108 695 C~0hlN 2008 12 22.20874 02 07 13.47 +03 53 12.6 23.4r 20108 695 C~0hlN 2008 12 22.29871 02 07 13.09 +03 53 11.1 22.6r 20108 695 C~0hlN 2014 09 30.296528 02 54 41.04 +04 44 55.2 20108 W84 C~3dnQ 2014 09 30.297882 02 54 41.04 +04 44 55.1 20108 W84 C~3dnQ 2021 12 01.265570 03 35 23.268 +04 24 19.28 23.9G 20108 G37 C~5JOH 2021 12 01.315200 03 35 23.045 +04 24 17.89 20108 G37 C~5JOH
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 0.13
2 0.0001 0.00 -0.31 0.00 -0.11
3 0.0002 0.00 -0.24 0.00 0.06
4 0.0026 0.00 0.53 0.00 0.64
5 0.0027 0.00 0.58 0.00 0.51
6 0.0054 0.00 0.12 0.00 0.17
7 0.0057 0.00 0.12 0.00 -0.55
8 0.1528 0.00 -0.74 0.00 0.08
9 0.1528 0.00 -0.64 0.00 -0.40
10 0.1528 0.00 -0.69 0.00 -0.17
11 0.1531 0.00 -0.61 0.00 -0.05
12 0.1531 0.00 -0.53 0.00 -0.53
13 0.1580 0.00 0.62 0.00 -0.20
14 0.1581 0.00 0.56 0.00 -0.32
15 0.1581 0.00 0.67 0.00 -0.46
16 0.1581 0.00 0.17 0.00 -0.71
17 0.1582 0.00 0.23 0.00 -0.46
18 0.1583 0.00 0.04 0.00 -0.40
19 0.1583 0.00 0.47 0.00 -0.31
20 0.3168 0.00 0.47 0.00 -1.13
21 0.3171 0.00 0.30 0.00 -0.83
22 0.3196 0.00 0.21 0.00 -0.80
23 0.3197 0.00 0.32 0.00 -0.63
24 0.9654 0.00 -0.08 0.00 0.40
25 0.9655 0.00 -0.17 0.00 0.48
26 0.9655 0.00 -0.10 0.00 0.57
27 0.9656 0.00 -0.02 0.00 0.58
28 0.9663 0.00 -0.53 0.00 0.46
29 0.9664 0.00 -0.46 0.00 0.65
30 0.9681 0.00 0.00 0.00 0.72
31 0.9681 0.00 -0.19 0.00 0.71
32 1.0207 0.00 0.68 0.00 -0.41
33 1.0208 0.00 0.65 0.00 -0.43
34 2.0285 0.00 -0.16 0.00 0.11
35 2.0287 0.00 -0.35 0.00 0.09
36 2.0723 0.00 -0.70 0.00 -0.08
37 2.0726 0.00 -0.66 0.00 -0.12
38 5.2503 0.00 -0.43 0.00 0.43
39 5.2529 0.00 0.68 0.00 1.51
40 5.2530 0.00 -0.33 0.00 0.38
41 5.2532 0.00 0.50 0.00 0.32
42 13.3133 0.00 -0.90 0.00 0.09
43 13.3160 0.00 1.83 0.00 1.18
44 13.3162 0.00 -0.63 0.00 0.11
45 19.0876 0.00 -0.22 0.00 -0.22
46 19.0876 0.00 -0.14 0.00 -0.27
47 26.2580 0.00 -0.19 0.00 -0.25
48 26.2581 0.00 0.31 0.00 -0.87
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.
20108 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.791 39.791 39.791 ecceobj 0.151 0.151 0.151 incobj 19.505 19.505 19.505 qmin 32.188 32.187 32.188 qmax 46.943 46.946 46.941 amean 39.456 39.456 39.456 amin 39.127 39.127 39.126 amax 39.845 39.846 39.845 emean 0.143 0.143 0.143 emin 0.109 0.109 0.109 emax 0.182 0.182 0.182 imean 19.638 19.638 19.639 imin 18.717 18.716 18.717 imax 20.655 20.655 20.655 excite_mean 0.366 0.366 0.366 fracstop 1.000 1.000 1.000 cjmean 2.897 2.897 2.897 libcent 0 179.7 179.7 179.7 libamp 0 44.0 44.1 43.8 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 176.1 176.0 176.2 kozaiamp 179.9 179.9 179.9