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: 558168 # Created Wed Apr 16 01:07:37 2025 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 119 observations of 119 # Arc: 16.39y # First observation: 2004/12/12 # Last observation: 2021/05/03 # Chi-squared of fit: 61.58 DOF: 232 RMS: 0.13 # Min/Max residuals: -0.37 0.54 # Exact a, adot, b, bdot, g, gdot: 2.455342E-05 7.508337E-02 -4.349656E-06 -1.607247E-02 4.740309E-02 -2.983379E-02 # 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 -8.450075 115.571988 0.567953 -0.118129 -0.795866 2453351.857067 # Heliocentric elements and errors Epoch: 2453352.5000 = 2004/12/13 Mean Anomaly: 353.58957 +/- 0.000 Argument of Peri: 268.39124 +/- 0.000 Long of Asc Node: 261.09011 +/- 0.000 Inclination: 14.71317 +/- 0.000 Eccentricity: 0.73659328 +/- 0.0000 Semi-Major Axis: 68.34830708 +/- 0.0000 Time of Perihelion: 2457027.6477 +/- 0.0 Perihelion: 18.00340368 +/- 0.0000 Aphelion: 118.69321049 +/- 0.0000 Period (y) 565.0669 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -8.84670691 +/- 0.0000 Ecliptic Y 19.79377105 +/- 0.0000 Ecliptic Z -3.10005007 +/- 0.0000 Ecliptic XDOT -0.00311803 +/- 0.0000 Ecliptic YDOT -0.00353958 +/- 0.0000 Ecliptic ZDOT -0.00066493 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 21.90154548 +/- 0.0000 Geocenter to KBO 21.09591198 +/- 0.0000 # Hcoef: 8.85
The following table shows the complete astrometric record for 558168. 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 (558168) followed by the observatory code and reference code for the source of the astrometry.
2004 12 12.356324 07 43 49.61 +12 42 52.7 558168 645 C~8qlq 2004 12 12.357153 07 43 49.59 +12 42 52.9 558168 645 C~8qlq 2004 12 12.359641 07 43 49.56 +12 42 52.9 558168 645 C~8qlq 2004 12 12.449604 07 43 48.96 +12 42 52.3 558168 645 C~8qlq 2004 12 12.450433 07 43 48.93 +12 42 52.3 558168 645 C~8qlq 2004 12 12.452092 07 43 48.91 +12 42 52.4 558168 645 C~8qlq 2004 12 12.452921 07 43 48.91 +12 42 52.3 558168 645 C~8qlq 2004 12 12.475095 07 43 48.80 +12 42 52.1 558168 645 C~8qlq 2004 12 12.475924 07 43 48.76 +12 42 52.3 558168 645 C~8qlq 2004 12 12.478412 07 43 48.76 +12 42 51.9 558168 645 C~8qlq 2004 12 13.335765 07 43 42.81 +12 42 47.5 558168 645 C~8qlq 2004 12 13.336594 07 43 42.80 +12 42 47.6 558168 645 C~8qlq 2004 12 13.339082 07 43 42.78 +12 42 47.7 558168 645 C~8qlq 2005 10 30.412477 08 03 03.30 +11 15 11.3 558168 645 C~8qlq 2005 10 30.413307 08 03 03.30 +11 15 11.2 558168 645 C~8qlq 2005 10 30.415794 08 03 03.31 +11 15 11.2 558168 645 C~8qlq 2011 02 23.43431 09 29 31.833 +00 01 22.11 21.2G 558168 F51 C~2jhw 2011 02 23.44661 09 29 31.726 +00 01 22.43 21.4G 558168 F51 C~2jhw 2011 03 12.41275 09 27 12.887 +00 15 33.37 20.8G 558168 F51 C~2jhw 2011 03 12.42450 09 27 12.844 +00 15 34.14 20.9G 558168 F51 C~2jhw 2012 01 25.42127 09 56 13.647 -02 54 26.81 21.4w 558168 F51 C~1vXw 2012 01 25.43556 09 56 13.529 -02 54 26.55 21.5w 558168 F51 C~1vXw 2012 01 25.44984 09 56 13.407 -02 54 26.40 21.4w 558168 F51 C~1vXw 2012 01 25.46421 09 56 13.286 -02 54 26.13 21.5w 558168 F51 C~1vXw 2012 02 12.43853 09 53 34.960 -02 46 31.13 20.9G 558168 F51 C~2jhw 2012 02 12.45222 09 53 34.813 -02 46 31.07 21.2G 558168 F51 C~2jhw 2012 02 12.46493 09 53 34.690 -02 46 30.78 22.3G 558168 F51 C~2jhw 2012 04 11.29487 09 46 27.219 -01 54 35.90 21.6G 558168 F51 C~2jhw 2012 04 11.30718 09 46 27.172 -01 54 35.23 21.4G 558168 F51 C~2jhw 2012 04 27.25316 09 45 58.915 -01 41 44.59 22.2G 558168 F51 C~2jhw 2012 04 27.26378 09 45 58.912 -01 41 43.97 22.7G 558168 F51 C~2jhw 2012 12 01.63507 10 21 58.359 -05 07 31.68 21.8G 558168 F51 C~2jhw 2012 12 01.63896 10 21 58.340 -05 07 31.61 21.3G 558168 F51 C~2jhw 2012 12 01.64637 10 21 58.374 -05 07 32.16 21.9G 558168 F51 C~2jhw 2012 12 01.65025 10 21 58.362 -05 07 32.83 22.0G 558168 F51 C~2jhw 2013 01 18.54847 10 19 55.174 -05 36 34.18 21.1G 558168 F51 C~2jhw 2013 02 03.45795 10 17 52.212 -05 33 29.06 21.4r 558168 F51 C~1vXw 2013 02 03.46959 10 17 52.094 -05 33 28.99 21.3r 558168 F51 C~1vXw 2013 02 03.48212 10 17 51.997 -05 33 28.69 21.3i 558168 F51 C~1vXw 2013 02 03.49488 10 17 51.894 -05 33 28.44 21.6i 558168 F51 C~1vXw 2014 01 24.52051 10 42 45.520 -08 17 04.31 21.8G 558168 F51 C~2jhw 2014 01 24.53152 10 42 45.460 -08 17 04.46 21.9G 558168 F51 C~2jhw 2014 12 10.63802 11 07 49.259 -10 21 22.24 21.3i 558168 F51 C~1vXw 2014 12 10.64198 11 07 49.255 -10 21 22.45 21.2i 558168 F51 C~1vXw 2014 12 10.64608 11 07 49.269 -10 21 22.86 21.3i 558168 F51 C~1vXw 2014 12 10.65005 11 07 49.288 -10 21 23.16 21.4i 558168 F51 C~1vXw 2014 12 18.60247 11 08 07.872 -10 30 42.49 21.2i 558168 F51 C~1vXw 2014 12 18.62517 11 08 07.916 -10 30 43.93 21.0i 558168 F51 C~1vXw 2014 12 18.63642 11 08 07.909 -10 30 44.79 21.0i 558168 F51 C~1vXw 2015 01 16.57774 11 07 23.669 -10 51 47.38 21.4r 558168 F51 C~1vXw 2015 01 16.58837 11 07 23.611 -10 51 47.57 21.6r 558168 F51 C~1vXw 2015 01 16.59918 11 07 23.561 -10 51 47.75 21.7r 558168 F51 C~1vXw 2015 01 20.49637 11 07 05.167 -10 52 55.62 21.5w 558168 F51 C~1vXw 2015 01 20.50950 11 07 05.094 -10 52 55.85 21.5w 558168 F51 C~1vXw 2015 01 20.52262 11 07 05.031 -10 52 55.90 21.6w 558168 F51 C~1vXw 2015 01 20.53579 11 07 04.958 -10 52 56.13 21.6w 558168 F51 C~1vXw 2015 01 22.50800 11 06 54.635 -10 53 20.62 21.4w 558168 F51 C~1vXw 2015 01 22.52059 11 06 54.566 -10 53 20.81 21.4w 558168 F51 C~1vXw 2015 01 22.53316 11 06 54.490 -10 53 20.92 21.5w 558168 F51 C~1vXw 2015 01 22.54575 11 06 54.426 -10 53 20.99 21.4w 558168 F51 C~1vXw 2015 03 22.35798 10 58 55.108 -10 21 26.38 21.4w 558168 F51 C~1vXw 2015 03 22.36854 10 58 55.022 -10 21 25.80 21.4w 558168 F51 C~1vXw 2015 03 22.37910 10 58 54.932 -10 21 25.08 21.4w 558168 F51 C~1vXw 2015 03 22.38964 10 58 54.834 -10 21 24.53 21.4w 558168 F51 C~1vXw 2015 03 23.38666 10 58 46.407 -10 20 19.56 21.2G 558168 F51 C~2jhw 2015 03 23.39728 10 58 46.319 -10 20 18.83 21.2G 558168 F51 C~2jhw 2015 03 23.40786 10 58 46.230 -10 20 18.09 21.1G 558168 F51 C~2jhw 2015 03 23.41848 10 58 46.131 -10 20 17.36 21.3G 558168 F51 C~2jhw 2015 04 23.33203 10 55 20.536 -09 44 47.25 21.1G 558168 F51 C~2jhw 2015 04 23.34456 10 55 20.463 -09 44 46.39 21.1G 558168 F51 C~2jhw 2016 01 18.56422 11 31 19.536 -13 20 17.92 21.6G 558168 F51 C~2jhw 2016 01 18.57675 11 31 19.487 -13 20 18.26 21.2G 558168 F51 C~2jhw 2016 01 18.58926 11 31 19.446 -13 20 18.54 21.6G 558168 F51 C~2jhw 2016 01 18.60169 11 31 19.396 -13 20 18.95 21.4G 558168 F51 C~2jhw 2016 01 19.66125 11 31 15.571 -13 20 45.49 21.7G 558168 F51 C~2jhw 2016 01 19.66912 11 31 15.557 -13 20 45.61 21.3G 558168 F51 C~2jhw 2016 02 01.54574 11 30 13.185 -13 23 39.81 21.3G 558168 F51 C~2jhw 2016 03 01.43738 11 26 31.776 -13 13 49.70 21.3G 558168 F51 C~2jhw 2016 03 01.44811 11 26 31.680 -13 13 49.16 21.2G 558168 F51 C~2jhw 2016 03 01.45851 11 26 31.583 -13 13 48.78 21.6G 558168 F51 C~2jhw 2016 03 01.46891 11 26 31.489 -13 13 48.39 21.3G 558168 F51 C~2jhw 2016 03 12.43543 11 24 52.581 -13 04 56.21 21.2G 558168 F51 C~2jhw 2016 04 01.03157 11 22 01.48 -12 44 20.3 21.7V 558168 W84 C~1vXw 2016 04 01.03473 11 22 01.46 -12 44 20.1 558168 W84 C~1vXw 2016 04 01.04107 11 22 01.40 -12 44 19.6 558168 W84 C~1vXw 2016 04 01.04421 11 22 01.38 -12 44 19.3 558168 W84 C~1vXw 2016 04 03.34304 11 21 42.912 -12 41 39.25 21.3G 558168 F51 C~2jhw 2016 04 03.35429 11 21 42.820 -12 41 38.43 21.3G 558168 F51 C~2jhw 2016 04 03.36554 11 21 42.732 -12 41 37.58 21.5G 558168 F51 C~2jhw 2016 04 03.37680 11 21 42.633 -12 41 36.84 21.4G 558168 F51 C~2jhw 2016 05 21.31528 11 18 10.634 -11 48 04.42 21.8G 558168 F51 C~2jhw 2017 02 04.56931 11 54 16.538 -15 43 10.00 21.6G 558168 F51 C~2jhw 2017 02 04.58115 11 54 16.474 -15 43 10.07 21.7G 558168 F51 C~2jhw 2017 02 04.59297 11 54 16.409 -15 43 10.07 21.6G 558168 F51 C~2jhw 2017 02 04.60479 11 54 16.341 -15 43 10.19 21.8G 558168 F51 C~2jhw 2017 02 17.51763 11 52 53.186 -15 41 48.66 20.8G 558168 F51 C~2jhw 2017 02 17.53010 11 52 53.072 -15 41 48.72 21.0G 558168 F51 C~2jhw 2017 02 17.54259 11 52 52.989 -15 41 48.46 21.7G 558168 F51 C~2jhw 2017 02 17.55506 11 52 52.888 -15 41 48.47 21.9G 558168 F51 C~2jhw 2017 03 21.41358 11 48 21.362 -15 20 48.35 21.4G 558168 F51 C~2jhw 2017 03 21.42479 11 48 21.254 -15 20 47.78 21.6G 558168 F51 C~2jhw 2017 03 31.36541 11 46 53.189 -15 10 20.40 21.3G 558168 F51 C~2jhw 2017 03 31.37728 11 46 53.083 -15 10 19.56 21.4G 558168 F51 C~2jhw 2017 03 31.38916 11 46 52.980 -15 10 18.69 21.2G 558168 F51 C~2jhw 2017 03 31.40104 11 46 52.874 -15 10 18.00 21.3G 558168 F51 C~2jhw 2017 04 25.32379 11 43 46.066 -14 40 31.70 21.9G 558168 F51 C~2jhw 2017 04 25.34470 11 43 45.942 -14 40 30.05 21.8G 558168 F51 C~2jhw 2017 04 25.35520 11 43 45.874 -14 40 29.30 21.6G 558168 F51 C~2jhw 2020 04 27.36553 12 56 17.104 -20 33 07.27 21.5w 558168 F51 C~3qMy 2020 04 27.37669 12 56 17.013 -20 33 06.53 21.5w 558168 F51 C~3qMy 2020 04 27.38785 12 56 16.917 -20 33 05.71 21.5w 558168 F51 C~3qMy 2020 04 27.39899 12 56 16.830 -20 33 04.90 21.5w 558168 F51 C~3qMy 2020 05 25.30924 12 53 21.135 -20 00 47.38 21.7w 558168 F52 C~3vRb 2020 05 25.32113 12 53 21.081 -20 00 46.47 21.5w 558168 F52 C~3vRb 2020 05 25.34492 12 53 20.985 -20 00 45.12 21.5w 558168 F52 C~3vRb 2021 05 03.372293 13 18 52.210 -21 54 03.68 21.4w 558168 F51 C~4n6v 2021 05 03.383313 13 18 52.126 -21 54 03.00 21.4w 558168 F51 C~4n6v 2021 05 03.394321 13 18 52.023 -21 54 02.39 21.4w 558168 F51 C~4n6v 2021 05 03.405332 13 18 51.944 -21 54 01.56 21.5w 558168 F51 C~4n6v
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 0.06 0.00 -0.22
2 0.0000 0.00 -0.15 0.00 -0.02
3 0.0000 0.00 -0.33 0.00 -0.00
4 0.0003 0.00 0.17 0.00 -0.09
5 0.0003 0.00 -0.19 0.00 -0.09
6 0.0003 0.00 -0.32 0.00 0.02
7 0.0003 0.00 -0.23 0.00 -0.07
8 0.0003 0.00 0.46 0.00 -0.14
9 0.0003 0.00 -0.05 0.00 0.06
10 0.0003 0.00 0.21 0.00 -0.32
11 0.0027 0.00 0.07 0.00 -0.14
12 0.0027 0.00 0.01 0.00 -0.04
13 0.0027 0.00 -0.02 0.00 0.07
14 0.8817 0.00 -0.01 0.00 0.08
15 0.8817 0.00 -0.03 0.00 0.01
16 0.8818 0.00 0.09 0.00 0.10
17 6.1987 0.00 -0.06 0.00 0.23
18 6.1987 0.00 0.01 0.00 -0.02
19 6.2452 0.00 -0.13 0.00 0.01
20 6.2452 0.00 0.54 0.00 0.16
21 7.1186 0.00 -0.07 0.00 -0.00
22 7.1186 0.00 -0.05 0.00 0.05
23 7.1187 0.00 -0.08 0.00 -0.02
24 7.1187 0.00 -0.09 0.00 0.04
25 7.1679 0.00 0.13 0.00 0.46
26 7.1680 0.00 -0.15 0.00 0.02
27 7.1680 0.00 -0.20 0.00 -0.16
28 7.3291 0.00 -0.15 0.00 -0.13
29 7.3291 0.00 -0.21 0.00 -0.12
30 7.3727 0.00 0.10 0.00 -0.09
31 7.3728 0.00 0.11 0.00 0.08
32 7.9706 0.00 0.28 0.00 -0.09
33 7.9707 0.00 -0.12 0.00 0.25
34 7.9707 0.00 0.16 0.00 0.21
35 7.9707 0.00 -0.14 0.00 -0.19
36 8.1018 0.00 -0.04 0.00 -0.03
37 8.1454 0.00 0.15 0.00 0.29
38 8.1454 0.00 -0.10 0.00 0.09
39 8.1455 0.00 0.08 0.00 0.10
40 8.1455 0.00 0.20 0.00 0.06
41 9.1175 0.00 -0.37 0.00 0.10
42 9.1175 0.00 -0.13 0.00 -0.07
43 9.9939 0.00 0.27 0.00 0.09
44 9.9939 0.00 0.03 0.00 0.18
45 9.9939 0.00 0.06 0.00 0.08
46 9.9940 0.00 0.17 0.00 0.08
47 10.0157 0.00 0.10 0.00 -0.06
48 10.0158 0.00 0.32 0.00 -0.02
49 10.0158 0.00 -0.00 0.00 -0.14
50 10.0951 0.00 0.22 0.00 -0.02
51 10.0951 0.00 0.08 0.00 0.01
52 10.0951 0.00 0.07 0.00 0.05
53 10.1058 0.00 0.05 0.00 -0.04
54 10.1058 0.00 -0.01 0.00 -0.08
55 10.1059 0.00 0.08 0.00 0.05
56 10.1059 0.00 0.03 0.00 0.01
57 10.1113 0.00 0.08 0.00 0.00
58 10.1113 0.00 0.10 0.00 -0.05
59 10.1114 0.00 0.02 0.00 -0.02
60 10.1114 0.00 0.12 0.00 0.04
61 10.2724 0.00 -0.21 0.00 0.22
62 10.2724 0.00 -0.13 0.00 0.12
63 10.2725 0.00 -0.10 0.00 0.15
64 10.2725 0.00 -0.19 0.00 0.02
65 10.2752 0.00 -0.05 0.00 -0.08
66 10.2753 0.00 0.00 0.00 -0.05
67 10.2753 0.00 0.04 0.00 -0.00
68 10.2753 0.00 -0.08 0.00 0.03
69 10.3600 0.00 0.07 0.00 0.00
70 10.3600 0.00 -0.17 0.00 0.02
71 11.0998 0.00 -0.06 0.00 -0.05
72 11.0999 0.00 -0.10 0.00 -0.06
73 11.0999 0.00 -0.02 0.00 -0.01
74 11.0999 0.00 -0.08 0.00 -0.10
75 11.1028 0.00 -0.01 0.00 -0.01
76 11.1028 0.00 0.24 0.00 0.06
77 11.1381 0.00 -0.24 0.00 -0.20
78 11.2172 0.00 -0.03 0.00 -0.06
79 11.2172 0.00 -0.01 0.00 0.03
80 11.2173 0.00 -0.05 0.00 -0.02
81 11.2173 0.00 -0.05 0.00 -0.07
82 11.2473 0.00 0.03 0.00 -0.07
83 11.3010 0.00 0.10 0.00 -0.04
84 11.3010 0.00 0.19 0.00 -0.06
85 11.3010 0.00 0.08 0.00 0.01
86 11.3010 0.00 0.17 0.00 0.09
87 11.3073 0.00 -0.02 0.00 -0.08
88 11.3073 0.00 -0.03 0.00 -0.05
89 11.3073 0.00 0.02 0.00 0.01
90 11.3074 0.00 -0.09 0.00 -0.05
91 11.4386 0.00 -0.25 0.00 -0.06
92 12.1484 0.00 -0.09 0.00 0.05
93 12.1485 0.00 -0.04 0.00 0.03
94 12.1485 0.00 -0.01 0.00 0.08
95 12.1485 0.00 -0.02 0.00 0.01
96 12.1839 0.00 0.18 0.00 0.27
97 12.1839 0.00 -0.12 0.00 0.00
98 12.1839 0.00 0.04 0.00 0.05
99 12.1840 0.00 -0.07 0.00 -0.17
100 12.2712 0.00 0.03 0.00 0.01
101 12.2712 0.00 -0.04 0.00 -0.08
102 12.2985 0.00 -0.02 0.00 -0.08
103 12.2985 0.00 -0.04 0.00 -0.03
104 12.2985 0.00 -0.01 0.00 0.05
105 12.2985 0.00 -0.02 0.00 -0.06
106 12.3668 0.00 -0.11 0.00 -0.14
107 12.3668 0.00 -0.02 0.00 -0.02
108 12.3669 0.00 -0.06 0.00 -0.04
109 15.3731 0.00 0.02 0.00 -0.03
110 15.3731 0.00 0.02 0.00 -0.06
111 15.3731 0.00 -0.06 0.00 -0.02
112 15.3731 0.00 -0.00 0.00 0.02
113 15.4496 0.00 -0.10 0.00 -0.10
114 15.4496 0.00 -0.11 0.00 0.02
115 15.4497 0.00 0.04 0.00 -0.21
116 16.3888 0.00 -0.02 0.00 0.09
117 16.3888 0.00 0.07 0.00 0.04
118 16.3889 0.00 -0.13 0.00 -0.09
119 16.3889 0.00 0.03 0.00 0.01
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.
558168 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 67.324 67.323 67.326 ecceobj 0.732 0.732 0.732 incobj 14.695 14.695 14.695 qmin 17.754 17.927 17.825 qmax 121.575 116.680 122.710 amean 68.025 67.378 69.022 amin 66.378 67.218 67.219 amax 69.910 67.593 70.500 emean 0.732 0.731 0.736 emin 0.725 0.726 0.726 emax 0.740 0.733 0.742 imean 16.436 16.204 16.365 imin 16.120 16.120 16.120 imax 16.593 16.289 16.496 excite_mean 0.785 0.782 0.788 fracstop 0.011 0.000 0.007 cjmean 2.408 2.410 2.404 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 274.0 268.8 270.7 kozaiamp 5.8 0.7 2.0