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: 87555 # Created Thu Nov 21 02:06:50 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 85 observations of 85 # Arc: 19.02y # First observation: 2000/08/25 # Last observation: 2019/08/31 # Chi-squared of fit: 159.16 DOF: 164 RMS: 0.24 # Min/Max residuals: -1.40 0.82 # Exact a, adot, b, bdot, g, gdot: 2.685375E-05 9.866014E-02 3.751070E-06 1.097525E-02 5.821411E-02 3.288176E-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 -2.407559 -50.606671 -0.383635 -0.039324 -0.931175 2451781.539503 # Heliocentric elements and errors Epoch: 2451782.5000 = 2000/08/26 Mean Anomaly: 14.74092 +/- 0.000 Argument of Peri: 284.32524 +/- 0.000 Long of Asc Node: 330.17359 +/- 0.000 Inclination: 6.79658 +/- 0.000 Eccentricity: 0.56038587 +/- 0.0000 Semi-Major Axis: 34.67954230 +/- 0.0000 Time of Perihelion: 2448728.0682 +/- 0.0 Perihelion: 15.24561672 +/- 0.0000 Aphelion: 54.11346789 +/- 0.0000 Period (y) 204.2294 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 11.78616189 +/- 0.0000 Ecliptic Y -13.73572378 +/- 0.0000 Ecliptic Z -0.72154204 +/- 0.0000 Ecliptic XDOT 0.00457293 +/- 0.0000 Ecliptic YDOT 0.00173928 +/- 0.0000 Ecliptic ZDOT 0.00045091 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 18.11348938 +/- 0.0000 Geocenter to KBO 17.17785612 +/- 0.0000 # Hcoef: 8.60
The following table shows the complete astrometric record for 87555. 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 (87555) followed by the observatory code and reference code for the source of the astrometry.
2000 08 25.03876 20 50 02.73 -20 13 22.8 20.4R 87555 807 Cc1045 2000 08 25.10181 20 50 02.14 -20 13 24.5 87555 807 Cc1045 2000 08 27.11767 20 49 43.80 -20 14 16.1 87555 807 Cc1045 2000 08 28.03186 20 49 35.64 -20 14 38.7 87555 807 Cc1045 2000 10 02.12275 20 45 56.08 -20 21 44.9 21.0R 87555 688 Cc1045 2000 10 02.19561 20 45 55.88 -20 21 44.4 87555 688 Cc1045 2001 08 19.12089 21 12 27.59 -18 01 50.5 19.1R 87555 807 Cd7651 2001 08 19.19962 21 12 26.83 -18 01 53.3 87555 807 Cd7651 2001 08 21.12734 21 12 08.34 -18 03 00.0 19.8R 87555 807 Cd7651 2001 08 21.20065 21 12 07.63 -18 03 02.6 87555 807 Cd7651 2001 09 12.22669 21 08 58.01 -18 13 38.8 20.9R 87555 695 Cd7651 2001 09 12.27374 21 08 57.66 -18 13 39.8 87555 695 Cd7651 2001 09 19.12648 21 08 10.50 -18 15 55.7 21.0R 87555 688 Cd7651 2001 09 19.22799 21 08 09.85 -18 15 57.4 87555 688 Cd7651 2002 07 10.19841 21 37 52.50 -15 28 32.9 20.9R 87555 304 Cf9761 2002 07 10.42178 21 37 50.74 -15 28 39.6 87555 304 Cf9761 2002 07 13.22786 21 37 29.95 -15 30 12.3 87555 304 Cf9761 2002 07 13.24957 21 37 29.78 -15 30 13.0 87555 304 Cf9761 2002 07 18.12573 21 36 51.42 -15 33 03.9 87555 304 Cf9761 2002 07 18.41358 21 36 49.03 -15 33 14.5 87555 304 Cf9761 2004 05 27.34074 22 12 44.22 -11 18 36.9 21.5R 87555 304 Ck8648 2004 05 27.37801 22 12 44.25 -11 18 36.5 87555 304 Ck8648 2004 12 13.252074 22 00 37.044 -12 08 11.97 21.3R 87555 568 Cm3239 2004 12 13.257770 22 00 37.085 -12 08 11.73 21.3R 87555 568 Cm3239 2004 12 13.263469 22 00 37.122 -12 08 11.55 21.2R 87555 568 Cm3239 2009 09 16.328577 23 06 59.10 -03 28 35.3 21.8V 87555 645 C~2FlW 2009 09 16.329407 23 06 59.09 -03 28 35.4 21.6V 87555 645 C~2FlW 2009 09 16.331894 23 06 59.07 -03 28 35.2 22.3V 87555 645 C~2FlW 2009 09 18.22100 23 06 45.11 -03 29 57.6 22.1R 87555 688 C~09l9 2009 09 18.27039 23 06 44.75 -03 29 59.7 87555 688 C~09l9 2009 09 18.491420 23 06 43.134 -03 30 09.65 23.3G 87555 F51 C~420T 2010 05 16.602983 23 22 43.474 -01 42 13.59 22.0G 87555 F51 C~420T 2010 09 15.448210 23 17 37.321 -01 59 30.59 22.5G 87555 F51 C~420T 2010 09 15.458280 23 17 37.245 -01 59 31.15 21.7G 87555 F51 C~420T 2010 09 15.468002 23 17 37.162 -01 59 31.43 21.9G 87555 F51 C~420T 2010 09 15.478269 23 17 37.107 -01 59 32.13 22.5G 87555 F51 C~420T 2010 09 16.510971 23 17 29.609 -02 00 16.69 22.6G 87555 F51 C~420T 2010 09 16.522491 23 17 29.502 -02 00 17.18 22.2G 87555 F51 C~420T 2011 06 09.597527 23 33 29.262 -00 09 52.71 22.3G 87555 F51 C~420T 2011 08 20.521486 23 30 29.508 -00 18 50.39 23.8G 87555 F51 C~420T 2011 08 23.543429 23 30 10.157 -00 20 37.18 21.8G 87555 F51 C~420T 2011 09 02.427667 23 29 03.450 -00 26 54.84 22.5G 87555 F51 C~420T 2011 09 02.441945 23 29 03.345 -00 26 55.11 22.7G 87555 F51 C~420T 2011 09 02.456269 23 29 03.250 -00 26 55.60 22.7G 87555 F51 C~420T 2011 09 02.470668 23 29 03.142 -00 26 56.74 21.8G 87555 F51 C~420T 2011 09 04.543478 23 28 48.650 -00 28 19.87 22.5G 87555 F51 C~420T 2011 09 04.554940 23 28 48.590 -00 28 20.25 22.5G 87555 F51 C~420T 2012 10 05.469949 23 34 27.846 +00 28 09.44 22.9G 87555 F51 C~420T 2013 09 10.498057 23 46 07.001 +02 00 07.82 22.1G 87555 F51 C~420T 2013 09 10.527998 23 46 06.810 +02 00 06.88 21.9G 87555 F51 C~420T 2013 09 10.542528 23 46 06.700 +02 00 05.87 22.1G 87555 F51 C~420T 2013 09 29.19286 23 44 00.09 +01 47 14.2 87555 W84 C~26Jr 2013 09 29.19426 23 44 00.09 +01 47 14.2 87555 W84 C~26Jr 2013 10 08.387867 23 43 00.165 +01 40 51.00 22.9G 87555 F51 C~420T 2014 08 18.488693 23 56 46.665 +03 23 14.79 23.3G 87555 F51 C~420T 2014 08 19.452746 23 56 41.500 +03 22 48.82 23.4G 87555 F51 C~420T 2014 08 31.413675 23 55 32.041 +03 16 34.06 22.9G 87555 F51 C~420T 2014 08 31.425368 23 55 31.990 +03 16 33.48 23.3G 87555 F51 C~420T 2014 08 31.437091 23 55 31.911 +03 16 33.27 22.3G 87555 F51 C~420T 2014 08 31.448890 23 55 31.835 +03 16 32.87 23.4G 87555 F51 C~420T 2014 12 12.228173 23 47 40.203 +02 23 22.14 23.1G 87555 F51 C~420T 2015 07 23.577234 00 06 15.959 +04 35 50.87 23.8G 87555 F51 C~420T 2015 07 23.589243 00 06 15.913 +04 35 50.62 23.5G 87555 F51 C~420T 2015 08 21.503734 00 04 21.461 +04 27 39.58 23.3G 87555 F51 C~420T 2015 09 10.544247 00 02 23.409 +04 16 51.71 22.9G 87555 F51 C~420T 2015 09 11.455055 00 02 17.597 +04 16 18.20 23.0G 87555 F51 C~420T 2015 09 11.479050 00 02 17.426 +04 16 17.20 22.6G 87555 F51 C~420T 2015 09 11.492693 00 02 17.349 +04 16 16.59 23.1G 87555 F51 C~420T 2015 09 23.343019 00 01 00.213 +04 08 36.42 23.5G 87555 F51 C~420T 2015 10 08.368925 23 59 22.933 +03 58 24.19 23.4G 87555 F51 C~420T 2015 10 09.370854 23 59 16.650 +03 57 43.35 23.8G 87555 F51 C~420T 2015 10 10.335507 23 59 10.660 +03 57 04.66 22.7G 87555 F51 C~420T 2015 11 01.286702 23 57 08.521 +03 43 12.14 22.9G 87555 F51 C~420T 2015 11 01.299670 23 57 08.460 +03 43 11.17 23.1G 87555 F51 C~420T 2015 11 01.311628 23 57 08.381 +03 43 10.72 22.6G 87555 F51 C~420T 2015 11 02.347669 23 57 03.546 +03 42 36.24 23.4G 87555 F51 C~420T 2015 11 07.252395 23 56 41.914 +03 39 57.55 24.1G 87555 F51 C~420T 2015 12 31.250272 23 55 52.397 +03 29 29.01 23.9G 87555 F51 C~420T 2016 08 14.600874 00 12 18.664 +05 32 10.83 23.0G 87555 F51 C~420T 2016 10 09.365581 00 06 47.364 +05 00 26.02 23.2G 87555 F51 C~420T 2016 11 21.212820 00 03 23.697 +04 36 12.43 22.9G 87555 F51 C~420T 2019 08 31.572185 00 31 33.464 +08 13 41.75 23.7G 87555 F51 C~420T 2019 08 31.584919 00 31 33.410 +08 13 41.50 23.7G 87555 F51 C~420T 2019 08 31.597633 00 31 33.345 +08 13 41.22 24.1G 87555 F51 C~420T 2019 08 31.610305 00 31 33.265 +08 13 40.73 23.5G 87555 F51 C~420T
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 0.03 0.00 -0.16
2 0.0002 0.00 0.05 0.00 -0.18
3 0.0057 0.00 0.09 0.00 -0.17
4 0.0082 0.00 0.11 0.00 -0.15
5 0.1043 0.00 0.02 0.00 -0.50
6 0.1045 0.00 0.52 0.00 -0.14
7 0.9831 0.00 -0.19 0.00 -0.02
8 0.9833 0.00 0.02 0.00 -0.06
9 0.9886 0.00 -0.19 0.00 0.10
10 0.9888 0.00 -0.15 0.00 0.02
11 1.0491 0.00 -0.12 0.00 0.07
12 1.0492 0.00 -0.03 0.00 0.11
13 1.0680 0.00 -0.11 0.00 -0.04
14 1.0683 0.00 0.07 0.00 0.02
15 1.8731 0.00 0.10 0.00 -0.12
16 1.8737 0.00 -1.40 0.00 0.39
17 1.8814 0.00 -0.23 0.00 0.63
18 1.8815 0.00 -0.24 0.00 0.67
19 1.8948 0.00 0.78 0.00 0.08
20 1.8956 0.00 0.82 0.00 -0.14
21 3.7544 0.00 0.06 0.00 0.23
22 3.7545 0.00 -0.27 0.00 0.16
23 4.3017 0.00 -0.07 0.00 -0.01
24 4.3018 0.00 -0.03 0.00 -0.01
25 4.3018 0.00 -0.04 0.00 -0.07
26 9.0603 0.00 0.13 0.00 -0.12
27 9.0603 0.00 0.08 0.00 -0.19
28 9.0604 0.00 0.06 0.00 0.12
29 9.0655 0.00 -0.34 0.00 0.17
30 9.0657 0.00 -0.20 0.00 0.22
31 9.0663 0.00 0.14 0.00 -0.18
32 9.7237 0.00 -0.60 0.00 -0.05
33 10.0572 0.00 0.06 0.00 -0.10
34 10.0573 0.00 0.04 0.00 -0.22
35 10.0573 0.00 -0.12 0.00 -0.08
36 10.0573 0.00 0.20 0.00 -0.33
37 10.0602 0.00 0.54 0.00 -0.03
38 10.0602 0.00 0.21 0.00 -0.02
39 10.7887 0.00 0.28 0.00 -0.21
40 10.9856 0.00 -0.14 0.00 0.16
41 10.9939 0.00 0.29 0.00 0.01
42 11.0209 0.00 0.10 0.00 -0.34
43 11.0210 0.00 0.04 0.00 -0.04
44 11.0210 0.00 0.14 0.00 0.04
45 11.0210 0.00 0.05 0.00 -0.52
46 11.0267 0.00 -0.10 0.00 0.02
47 11.0267 0.00 0.22 0.00 0.11
48 12.1134 0.00 0.27 0.00 0.07
49 13.0444 0.00 0.03 0.00 -0.21
50 13.0445 0.00 0.25 0.00 0.04
51 13.0445 0.00 0.10 0.00 -0.39
52 13.0956 0.00 -0.16 0.00 0.12
53 13.0956 0.00 -0.01 0.00 0.18
54 13.1207 0.00 -0.11 0.00 0.14
55 13.9807 0.00 -0.12 0.00 -0.09
56 13.9833 0.00 -0.15 0.00 0.54
57 14.0161 0.00 -0.21 0.00 0.03
58 14.0161 0.00 0.12 0.00 -0.15
59 14.0161 0.00 0.04 0.00 0.04
60 14.0162 0.00 0.02 0.00 0.05
61 14.2976 0.00 0.12 0.00 0.14
62 14.9091 0.00 0.11 0.00 0.26
63 14.9091 0.00 -0.11 0.00 0.08
64 14.9883 0.00 0.01 0.00 -0.11
65 15.0431 0.00 0.18 0.00 -0.06
66 15.0456 0.00 -0.01 0.00 0.12
67 15.0457 0.00 -0.23 0.00 0.01
68 15.0457 0.00 -0.05 0.00 -0.09
69 15.0782 0.00 -0.10 0.00 0.11
70 15.1193 0.00 -0.03 0.00 0.08
71 15.1221 0.00 -0.00 0.00 0.01
72 15.1247 0.00 0.29 0.00 0.48
73 15.1848 0.00 -0.22 0.00 0.10
74 15.1848 0.00 -0.18 0.00 -0.43
75 15.1849 0.00 -0.50 0.00 -0.47
76 15.1877 0.00 -0.05 0.00 0.06
77 15.2011 0.00 -0.09 0.00 -0.09
78 15.3490 0.00 0.07 0.00 -0.13
79 15.9714 0.00 0.07 0.00 -0.06
80 16.1241 0.00 -0.11 0.00 0.18
81 16.2414 0.00 0.16 0.00 0.09
82 19.0158 0.00 -0.07 0.00 0.02
83 19.0159 0.00 0.11 0.00 0.10
84 19.0159 0.00 0.13 0.00 0.15
85 19.0159 0.00 -0.08 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.
87555 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 34.770 34.771 34.770 ecceobj 0.561 0.561 0.561 incobj 6.792 6.792 6.792 qmin 15.218 15.130 14.875 qmax 55.249 56.157 60.149 amean 35.036 35.176 35.662 amin 34.770 34.706 34.172 amax 35.335 35.749 37.844 emean 0.563 0.565 0.570 emin 0.559 0.559 0.558 emax 0.568 0.573 0.589 imean 7.935 7.770 6.268 imin 7.897 7.482 5.127 imax 8.026 8.026 8.065 excite_mean 0.579 0.581 0.580 fracstop 0.001 0.002 0.018 cjmean 2.624 2.621 2.622 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 286.8 290.1 177.1 kozaiamp 3.0 5.7 178.9