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: 20BW6 # Created Sun Dec 22 02:11:10 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 52 observations of 52 # Arc: 3.44y # First observation: 2017/10/30 # Last observation: 2021/04/07 # Chi-squared of fit: 73.03 DOF: 98 RMS: 0.21 # Min/Max residuals: -0.50 0.84 # Exact a, adot, b, bdot, g, gdot: 4.027805E-05 3.961820E-01 -6.476296E-07 -1.986994E-02 1.557618E-01 -1.351236E-01 # Covariance matrix: 8.0702E-11 -7.5617E-09 -3.4131E-12 1.4715E-10 -4.8350E-10 1.1477E-08 -7.5617E-09 8.9758E-07 3.2018E-10 -1.7543E-08 4.5358E-08 -1.3746E-06 -3.4131E-12 3.2018E-10 4.5468E-13 -6.5182E-12 2.0528E-11 -4.8592E-10 1.4715E-10 -1.7543E-08 -6.5182E-12 1.5405E-09 -8.8264E-10 2.6909E-08 -4.8350E-10 4.5358E-08 2.0528E-11 -8.8264E-10 2.9080E-09 -6.8839E-08 1.1477E-08 -1.3746E-06 -4.8592E-10 2.6909E-08 -6.8839E-08 2.1088E-06 # lat0 lon0 xBary yBary zBary JD0 -1.442726 73.466185 0.589337 -0.020125 -0.805360 2458057.070579 # Heliocentric elements and errors Epoch: 2458056.5000 = 2017/10/30 Mean Anomaly: 332.45266 +/- 0.001 Argument of Peri: 279.65396 +/- 0.000 Long of Asc Node: 225.84400 +/- 0.000 Inclination: 3.27581 +/- 0.000 Eccentricity: 0.49871838 +/- 0.0000 Semi-Major Axis: 10.75051161 +/- 0.0000 Time of Perihelion: 2459041.6883 +/- 0.0 Perihelion: 5.38903384 +/- 0.0000 Aphelion: 16.11198937 +/- 0.0000 Period (y) 35.2494 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 2.61828018 +/- 0.0000 Ecliptic Y 6.75150763 +/- 0.0000 Ecliptic Z -0.16167609 +/- 0.0000 Ecliptic XDOT -0.00734867 +/- 0.0000 Ecliptic YDOT -0.00030826 +/- 0.0000 Ecliptic ZDOT -0.00028947 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 7.24333689 +/- 0.0000 Geocenter to KBO 6.42017861 +/- 0.0000 # Hcoef: 14.71
The following table shows the complete astrometric record for 20BW6. 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 (20BW6) followed by the observatory code and reference code for the source of the astrometry.
2017 10 30.569778 04 49 02.392 +20 59 02.77 22.9G 20BW6 F51 C~3d4E 2017 10 30.582453 04 49 02.189 +20 59 02.74 22.7G 20BW6 F51 C~3d4E 2017 10 30.583094 04 49 02.178 +20 59 02.29 22.5G 20BW6 F51 C~3d4E 2017 10 30.595079 04 49 01.974 +20 59 01.83 23.1G 20BW6 F51 C~3d4E 2017 10 30.607691 04 49 01.726 +20 59 00.81 22.0G 20BW6 F51 C~3d4E 2017 11 21.368094 04 41 39.026 +20 39 19.98 23.5G 20BW6 F51 C~3d4E 2017 11 21.381095 04 41 38.678 +20 39 19.18 23.4G 20BW6 F51 C~3d4E 2017 11 21.394210 04 41 38.393 +20 39 18.68 22.7G 20BW6 F51 C~3d4E 2017 11 21.407426 04 41 38.051 +20 39 18.07 22.2G 20BW6 F51 C~3d4E 2017 12 10.287737 04 33 53.682 +20 19 56.20 22.7G 20BW6 F51 C~3d4E 2017 12 10.300182 04 33 53.345 +20 19 54.94 22.3G 20BW6 F51 C~3d4E 2017 12 10.312590 04 33 53.071 +20 19 54.27 23.0G 20BW6 F51 C~3d4E 2017 12 10.324985 04 33 52.744 +20 19 53.80 23.1G 20BW6 F51 C~3d4E 2019 11 04.602274 08 54 45.000 +14 03 09.34 22.3G 20BW6 F51 C~3d4E 2019 11 04.613364 08 54 45.232 +14 03 07.86 22.2G 20BW6 F51 C~3d4E 2019 11 04.624562 08 54 45.463 +14 03 06.48 22.4G 20BW6 F51 C~3d4E 2019 11 27.563514 08 59 59.060 +13 25 11.63 22.1G 20BW6 F51 C~3d4E 2019 11 27.574712 08 59 59.104 +13 25 10.96 22.7G 20BW6 F51 C~3d4E 2019 11 27.585869 08 59 59.168 +13 25 10.16 22.4G 20BW6 F51 C~3d4E 2019 11 27.597119 08 59 59.230 +13 25 09.63 22.9G 20BW6 F51 C~3d4E 2019 11 29.531383 09 00 09.003 +13 23 06.26 22.7G 20BW6 F52 C~3d4E 2020 01 01.567363 08 56 14.137 +13 18 43.87 21.9G 20BW6 F51 C~3d4E 2020 01 01.580972 08 56 13.885 +13 18 44.43 21.8G 20BW6 F51 C~3d4E 2020 01 01.594506 08 56 13.651 +13 18 44.99 22.1G 20BW6 F51 C~3d4E 2020 01 17.383058 08 50 38.396 +13 35 37.82 21.8G 20BW6 F51 C~3d4E 2020 01 21.385765 08 48 59.549 +13 41 20.02 21.6G 20BW6 F52 C~3d4E 2020 01 21.397587 08 48 59.256 +13 41 20.92 22.1G 20BW6 F52 C~3d4E 2020 01 21.410014 08 48 58.935 +13 41 21.96 22.4G 20BW6 F52 C~3d4E 2020 01 21.422252 08 48 58.599 +13 41 23.13 21.7G 20BW6 F52 C~3d4E 2020 01 23.376228 08 48 09.120 +13 44 19.75 21.7G 20BW6 F51 C~3d4E 2020 01 23.387059 08 48 08.841 +13 44 20.85 21.7G 20BW6 F51 C~3d4E 2020 01 23.397843 08 48 08.560 +13 44 21.76 21.9G 20BW6 F51 C~3d4E 2020 01 23.408632 08 48 08.262 +13 44 22.78 22.0G 20BW6 F51 C~3d4E 2020 01 24.338832 08 47 44.519 +13 45 48.77 22.1w 20BW6 F51 C~3d4E 2020 01 24.348869 08 47 44.268 +13 45 49.79 21.9w 20BW6 F51 C~3d4E 2020 01 24.358902 08 47 44.000 +13 45 50.70 21.9w 20BW6 F51 C~3d4E 2020 01 24.368913 08 47 43.738 +13 45 51.81 21.9w 20BW6 F51 C~3d4E 2020 01 25.33916 08 47 18.69 +13 47 22.3 21.4G 20BW6 G96 C~3d4E 2020 01 25.34427 08 47 18.57 +13 47 22.5 21.9G 20BW6 G96 C~3d4E 2020 01 25.34937 08 47 18.43 +13 47 23.7 22.2G 20BW6 G96 C~3d4E 2020 01 25.35448 08 47 18.29 +13 47 24.4 21.2G 20BW6 G96 C~3d4E 2020 01 25.509308 08 47 14.297 +13 47 38.93 22.0w 20BW6 F51 C~3d4E 2020 01 25.522696 08 47 13.937 +13 47 40.16 21.6w 20BW6 F51 C~3d4E 2020 01 25.536126 08 47 13.590 +13 47 41.50 21.5w 20BW6 F51 C~3d4E 2020 01 25.549550 08 47 13.232 +13 47 42.67 21.9w 20BW6 F51 C~3d4E 2020 02 01.26544 08 44 18.74 +13 58 42.2 21.5G 20BW6 G96 C~3d4E 2020 02 01.27103 08 44 18.56 +13 58 42.8 21.9G 20BW6 G96 C~3d4E 2020 02 01.27663 08 44 18.41 +13 58 43.9 21.9G 20BW6 G96 C~3d4E 2020 02 01.28222 08 44 18.35 +13 58 43.8 20.9G 20BW6 G96 C~3d4E 2021 04 07.35073 11 01 42.105 +02 46 53.80 22.1w 20BW6 F51 C~4iTc 2021 04 07.36285 11 01 41.918 +02 46 55.25 22.2w 20BW6 F51 C~4iTc 2021 04 07.37495 11 01 41.729 +02 46 57.10 22.2w 20BW6 F51 C~4iTc
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 0.02 0.00 -0.28
2 0.0000 0.00 0.14 0.00 0.30
3 0.0000 0.00 0.14 0.00 -0.12
4 0.0001 0.00 0.07 0.00 -0.01
5 0.0001 0.00 -0.50 0.00 -0.42
6 0.0597 0.00 0.30 0.00 -0.13
7 0.0597 0.00 -0.21 0.00 -0.17
8 0.0598 0.00 0.27 0.00 0.10
9 0.0598 0.00 -0.06 0.00 0.27
10 0.1115 0.00 0.04 0.00 0.36
11 0.1115 0.00 -0.33 0.00 -0.16
12 0.1115 0.00 0.23 0.00 -0.09
13 0.1116 0.00 -0.01 0.00 0.17
14 2.0124 0.00 -0.14 0.00 0.18
15 2.0124 0.00 -0.09 0.00 0.11
16 2.0125 0.00 -0.09 0.00 0.15
17 2.0753 0.00 0.21 0.00 -0.06
18 2.0753 0.00 0.02 0.00 0.01
19 2.0753 0.00 0.13 0.00 -0.05
20 2.0754 0.00 0.21 0.00 0.17
21 2.0807 0.00 0.11 0.00 0.48
22 2.1711 0.00 0.01 0.00 0.03
23 2.1711 0.00 -0.02 0.00 0.00
24 2.1712 0.00 0.20 0.00 -0.02
25 2.2144 0.00 -0.08 0.00 0.06
26 2.2254 0.00 -0.05 0.00 0.14
27 2.2254 0.00 0.14 0.00 -0.03
28 2.2254 0.00 0.15 0.00 -0.10
29 2.2255 0.00 -0.14 0.00 -0.03
30 2.2308 0.00 -0.06 0.00 -0.06
31 2.2308 0.00 0.01 0.00 0.03
32 2.2309 0.00 0.04 0.00 -0.07
33 2.2309 0.00 -0.19 0.00 -0.05
34 2.2335 0.00 -0.06 0.00 -0.08
35 2.2335 0.00 0.13 0.00 -0.01
36 2.2335 0.00 0.06 0.00 -0.05
37 2.2335 0.00 0.08 0.00 0.11
38 2.2362 0.00 -0.28 0.00 -0.18
39 2.2362 0.00 -0.05 0.00 -0.46
40 2.2362 0.00 -0.12 0.00 0.26
41 2.2362 0.00 -0.19 0.00 0.48
42 2.2367 0.00 0.16 0.00 -0.01
43 2.2367 0.00 0.09 0.00 -0.04
44 2.2367 0.00 0.22 0.00 0.05
45 2.2368 0.00 0.18 0.00 -0.03
46 2.2552 0.00 -0.03 0.00 -0.30
47 2.2552 0.00 -0.49 0.00 -0.27
48 2.2552 0.00 -0.50 0.00 0.26
49 2.2552 0.00 0.84 0.00 -0.41
50 3.4354 0.00 -0.07 0.00 -0.04
51 3.4354 0.00 0.01 0.00 -0.16
52 3.4355 0.00 0.04 0.00 0.12
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.
20BW6 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 10.784 10.784 10.784 ecceobj 0.498 0.498 0.498 incobj 3.265 3.265 3.265 qmin 5.417 5.417 5.417 qmax 16.151 16.151 16.151 amean 10.784 10.784 10.784 amin 10.784 10.784 10.784 amax 10.784 10.784 10.784 emean 0.498 0.498 0.498 emin 0.498 0.498 0.498 emax 0.498 0.498 0.498 imean 4.253 4.253 4.253 imin 4.253 4.253 4.253 imax 4.253 4.253 4.253 excite_mean 0.503 0.503 0.503 fracstop 0.000 0.000 0.000 cjmean 3.827 3.827 3.827 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 278.9 278.9 278.9 kozaiamp 0.0 0.0 0.0