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: 20DD5 # Created Fri Nov 22 02:11:03 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 64 observations of 64 # Arc: 6.96y # First observation: 2015/03/11 # Last observation: 2022/02/24 # Chi-squared of fit: 68.42 DOF: 122 RMS: 0.18 # Min/Max residuals: -0.78 0.87 # Exact a, adot, b, bdot, g, gdot: 2.672261E-05 9.247314E-02 1.704415E-06 4.635293E-03 5.460323E-02 -2.171396E-02 # Covariance matrix: 1.7334E-13 -6.8151E-14 2.6668E-15 -2.3612E-15 -5.5778E-14 -6.0191E-14 -6.8151E-14 4.9010E-14 -2.8552E-15 2.1337E-15 -4.1028E-15 5.2846E-14 2.6668E-15 -2.8552E-15 7.4594E-14 -1.6956E-14 1.2986E-15 -3.4554E-15 -2.3612E-15 2.1337E-15 -1.6956E-14 5.1249E-15 -3.9903E-16 2.5682E-15 -5.5778E-14 -4.1028E-15 1.2986E-15 -3.9903E-16 9.4366E-14 -7.2277E-15 -6.0191E-14 5.2846E-14 -3.4554E-15 2.5682E-15 -7.2277E-15 6.3543E-14 # lat0 lon0 xBary yBary zBary JD0 -2.473165 119.705578 -0.761796 -0.027115 -0.631876 2457092.631572 # Heliocentric elements and errors Epoch: 2457092.5000 = 2015/03/11 Mean Anomaly: 349.61003 +/- 0.001 Argument of Peri: 354.62816 +/- 0.001 Long of Asc Node: 160.91941 +/- 0.000 Inclination: 3.80005 +/- 0.000 Eccentricity: 0.49071023 +/- 0.0000 Semi-Major Axis: 35.18787666 +/- 0.0018 Time of Perihelion: 2459292.8900 +/- 5.8 Perihelion: 17.92082553 +/- 0.0012 Aphelion: 52.45492780 +/- 0.0028 Period (y) 208.7362 +/- 0.02 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -10.04551183 +/- 0.0001 Ecliptic Y 16.06443598 +/- 0.0001 Ecliptic Z -0.79027482 +/- 0.0000 Ecliptic XDOT -0.00349677 +/- 0.0000 Ecliptic YDOT -0.00323948 +/- 0.0000 Ecliptic ZDOT 0.00027927 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 18.96329464 +/- 0.0001 Geocenter to KBO 18.31408627 +/- 0.0001 # Hcoef: 10.08
The following table shows the complete astrometric record for 20DD5. 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 (20DD5) followed by the observatory code and reference code for the source of the astrometry.
2015 03 11.130794 08 05 19.01 +17 47 37.2 20DD5 W84 C~3qVF 2015 03 11.132858 08 05 19.01 +17 47 37.0 20DD5 W84 C~3qVF 2016 01 03.414866 08 37 34.579 +16 10 40.82 22.7G 20DD5 F51 C~3nVn 2016 01 03.426499 08 37 34.476 +16 10 41.15 22.6G 20DD5 F51 C~3nVn 2016 01 03.438132 08 37 34.360 +16 10 41.59 22.3G 20DD5 F51 C~3nVn 2016 01 03.449819 08 37 34.263 +16 10 42.03 22.7G 20DD5 F51 C~3nVn 2016 01 07.391008 08 36 59.590 +16 12 51.66 22.1G 20DD5 F51 C~3nVn 2016 01 07.403482 08 36 59.446 +16 12 52.08 22.7G 20DD5 F51 C~3nVn 2016 01 07.415944 08 36 59.346 +16 12 52.43 22.6G 20DD5 F51 C~3nVn 2016 01 07.428442 08 36 59.223 +16 12 52.99 22.4G 20DD5 F51 C~3nVn 2016 02 09.331403 08 31 40.496 +16 33 51.63 22.9G 20DD5 F51 C~3nVn 2016 02 09.343666 08 31 40.375 +16 33 51.94 22.8G 20DD5 F51 C~3nVn 2016 02 09.355822 08 31 40.266 +16 33 52.22 22.2G 20DD5 F51 C~3nVn 2016 03 03.240114 08 28 26.784 +16 47 54.79 22.5G 20DD5 F51 C~3nVn 2016 03 03.251759 08 28 26.714 +16 47 55.09 22.7G 20DD5 F51 C~3nVn 2016 03 03.265247 08 28 26.600 +16 47 55.61 23.6G 20DD5 F51 C~3nVn 2016 03 03.276928 08 28 26.534 +16 47 55.77 23.2G 20DD5 F51 C~3nVn 2016 04 28.258837 08 26 53.051 +17 02 14.89 22.6G 20DD5 F51 C~3nVn 2016 05 02.256654 08 27 11.586 +17 01 50.20 22.2G 20DD5 F51 C~3nVn 2017 01 26.381082 08 57 02.391 +15 13 46.97 22.7G 20DD5 F51 C~3nVn 2017 01 26.391847 08 57 02.289 +15 13 47.50 22.3G 20DD5 F51 C~3nVn 2017 01 26.402639 08 57 02.177 +15 13 47.96 22.0G 20DD5 F51 C~3nVn 2017 01 26.413564 08 57 02.085 +15 13 48.38 21.9G 20DD5 F51 C~3nVn 2017 02 04.515998 08 55 32.322 +15 20 31.94 22.4G 20DD5 F51 C~3nVn 2017 02 04.528536 08 55 32.196 +15 20 32.17 22.2G 20DD5 F51 C~3nVn 2017 02 04.541066 08 55 32.087 +15 20 32.74 22.1G 20DD5 F51 C~3nVn 2017 02 04.553582 08 55 31.957 +15 20 33.13 23.3G 20DD5 F51 C~3nVn 2018 01 16.415190 09 22 07.963 +13 43 43.82 22.0G 20DD5 F51 C~3nVn 2018 01 16.427044 09 22 07.848 +13 43 44.30 22.4G 20DD5 F51 C~3nVn 2018 01 16.438886 09 22 07.750 +13 43 44.84 22.5G 20DD5 F51 C~3nVn 2018 01 16.450715 09 22 07.648 +13 43 45.37 22.7G 20DD5 F51 C~3nVn 2018 03 07.237739 09 14 25.653 +14 22 40.92 22.3G 20DD5 F51 C~3nVn 2018 03 07.249367 09 14 25.597 +14 22 41.19 22.6G 20DD5 F51 C~3nVn 2018 03 07.260995 09 14 25.492 +14 22 42.08 22.8G 20DD5 F51 C~3nVn 2018 03 07.272626 09 14 25.400 +14 22 42.48 22.9G 20DD5 F51 C~3nVn 2018 03 17.264589 09 13 12.783 +14 29 20.19 22.1G 20DD5 F51 C~3nVn 2019 01 03.582516 09 47 16.773 +12 02 35.92 22.7G 20DD5 F51 C~3nVn 2019 01 03.594276 09 47 16.698 +12 02 36.28 22.9G 20DD5 F51 C~3nVn 2019 01 03.605992 09 47 16.623 +12 02 36.60 22.1G 20DD5 F51 C~3nVn 2019 01 03.617761 09 47 16.540 +12 02 36.93 22.3G 20DD5 F51 C~3nVn 2019 01 10.449639 09 46 30.958 +12 06 39.44 23.0G 20DD5 F51 C~3nVn 2019 01 10.461469 09 46 30.888 +12 06 39.98 22.9G 20DD5 F51 C~3nVn 2019 01 10.473333 09 46 30.804 +12 06 40.57 22.6G 20DD5 F51 C~3nVn 2019 01 10.485129 09 46 30.720 +12 06 40.88 22.3G 20DD5 F51 C~3nVn 2020 01 19.449840 10 08 59.240 +10 31 12.61 22.5G 20DD5 F51 C~3nVn 2020 01 19.462695 10 08 59.142 +10 31 13.23 22.7G 20DD5 F51 C~3nVn 2020 01 19.475592 10 08 59.047 +10 31 13.71 22.3G 20DD5 F51 C~3nVn 2020 01 19.488515 10 08 58.936 +10 31 14.32 22.3G 20DD5 F51 C~3nVn 2020 01 21.590256 10 08 42.882 +10 32 48.48 23.2G 20DD5 F51 C~3nVn 2020 01 21.602574 10 08 42.770 +10 32 49.24 23.1G 20DD5 F51 C~3nVn 2020 01 21.614931 10 08 42.674 +10 32 49.86 22.5G 20DD5 F51 C~3nVn 2020 02 29.36104 10 02 49.96 +11 07 27.3 22.3G 20DD5 V00 C~3nVn 2020 02 29.36739 10 02 49.88 +11 07 27.5 22.6G 20DD5 V00 C~3nVn 2020 02 29.37374 10 02 49.82 +11 07 27.9 22.3G 20DD5 V00 C~3nVn 2020 02 29.38008 10 02 49.77 +11 07 28.6 21.8G 20DD5 V00 C~3nVn 2020 03 03.12582 10 02 24.42 +11 09 59.9 21.7G 20DD5 807 C~3nVn 2020 03 03.13768 10 02 24.30 +11 10 00.6 21.6G 20DD5 807 C~3nVn 2020 03 03.14957 10 02 24.18 +11 10 01.3 21.9G 20DD5 807 C~3nVn 2020 03 13.07727 10 00 56.98 +11 18 44.7 23.0G 20DD5 807 C~3nVn 2020 03 13.08915 10 00 56.92 +11 18 44.8 23.1G 20DD5 807 C~3nVn 2020 03 13.10102 10 00 56.77 +11 18 45.8 23.0G 20DD5 807 C~3nVn 2022 02 24.394280 10 50 46.296 +07 21 05.91 22.3w 20DD5 F52 C~5SJI 2022 02 24.406493 10 50 46.165 +07 21 06.89 22.2w 20DD5 F52 C~5SJI 2022 02 24.423179 10 50 46.024 +07 21 07.91 22.0w 20DD5 F52 C~5SJI
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 -0.08
2 0.0000 0.00 0.16 0.00 -0.32
3 0.8167 0.00 0.13 0.00 -0.01
4 0.8167 0.00 0.12 0.00 -0.05
5 0.8167 0.00 -0.09 0.00 0.01
6 0.8168 0.00 -0.01 0.00 0.08
7 0.8275 0.00 0.29 0.00 -0.00
8 0.8276 0.00 -0.16 0.00 -0.01
9 0.8276 0.00 0.06 0.00 -0.09
10 0.8276 0.00 -0.07 0.00 0.04
11 0.9177 0.00 -0.11 0.00 0.01
12 0.9178 0.00 -0.14 0.00 -0.17
13 0.9178 0.00 0.00 0.00 -0.38
14 0.9804 0.00 -0.14 0.00 0.27
15 0.9805 0.00 0.07 0.00 0.19
16 0.9805 0.00 -0.18 0.00 0.26
17 0.9806 0.00 0.10 0.00 0.03
18 1.1338 0.00 0.24 0.00 -0.33
19 1.1448 0.00 -0.20 0.00 0.87
20 1.8816 0.00 -0.08 0.00 -0.04
21 1.8816 0.00 0.01 0.00 0.01
22 1.8816 0.00 -0.06 0.00 -0.00
23 1.8817 0.00 0.20 0.00 -0.06
24 1.9066 0.00 -0.20 0.00 0.22
25 1.9066 0.00 -0.21 0.00 -0.10
26 1.9067 0.00 0.04 0.00 -0.08
27 1.9067 0.00 -0.03 0.00 -0.25
28 2.8536 0.00 0.02 0.00 0.02
29 2.8537 0.00 -0.13 0.00 -0.01
30 2.8537 0.00 -0.01 0.00 0.03
31 2.8537 0.00 0.04 0.00 0.05
32 2.9900 0.00 -0.38 0.00 -0.04
33 2.9901 0.00 0.19 0.00 -0.28
34 2.9901 0.00 0.03 0.00 0.11
35 2.9901 0.00 0.07 0.00 0.01
36 3.0175 0.00 0.04 0.00 0.06
37 3.8178 0.00 0.08 0.00 0.17
38 3.8178 0.00 0.07 0.00 0.15
39 3.8179 0.00 0.06 0.00 0.09
40 3.8179 0.00 -0.07 0.00 0.04
41 3.8366 0.00 -0.22 0.00 -0.06
42 3.8366 0.00 0.04 0.00 0.02
43 3.8367 0.00 0.09 0.00 0.16
44 3.8367 0.00 0.14 0.00 0.01
45 4.8606 0.00 0.07 0.00 -0.03
46 4.8606 0.00 0.08 0.00 0.02
47 4.8606 0.00 0.14 0.00 -0.07
48 4.8607 0.00 -0.03 0.00 -0.03
49 4.8664 0.00 0.17 0.00 0.03
50 4.8665 0.00 -0.04 0.00 0.23
51 4.8665 0.00 -0.01 0.00 0.29
52 4.9726 0.00 0.31 0.00 0.08
53 4.9726 0.00 0.01 0.00 -0.07
54 4.9726 0.00 0.01 0.00 -0.02
55 4.9726 0.00 0.17 0.00 0.33
56 4.9801 0.00 0.05 0.00 -0.06
57 4.9802 0.00 -0.08 0.00 -0.01
58 4.9802 0.00 -0.22 0.00 0.04
59 5.0074 0.00 -0.26 0.00 -0.28
60 5.0074 0.00 0.36 0.00 -0.78
61 5.0074 0.00 -0.37 0.00 -0.38
62 6.9603 0.00 0.05 0.00 -0.11
63 6.9604 0.00 -0.19 0.00 0.13
64 6.9604 0.00 0.06 0.00 0.13
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.
20DD5 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 35.036 35.036 35.037 ecceobj 0.486 0.486 0.486 incobj 3.802 3.802 3.802 qmin 18.020 18.020 18.020 qmax 52.053 52.052 52.054 amean 35.036 35.036 35.037 amin 35.036 35.036 35.037 amax 35.036 35.036 35.037 emean 0.486 0.486 0.486 emin 0.486 0.486 0.486 emax 0.486 0.486 0.486 imean 3.122 3.122 3.122 imin 3.122 3.122 3.122 imax 3.122 3.122 3.122 excite_mean 0.489 0.489 0.489 fracstop 0.000 0.000 0.000 cjmean 2.744 2.744 2.744 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 354.3 354.3 354.3 kozaiamp 0.0 0.0 0.0