The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory.
# Object: 90568 # Created Fri May 2 02:36:20 2008 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 46 observations of 47 # Arc: 49.47y # First observation: 1954/12/21 # Last observation: 2004/06/09 # Chi-squared of fit: 434.08 DOF: 86 RMS: 0.54 # Min/Max residuals: -1.16 1.91 # Exact a, adot, b, bdot, g, gdot: 1.572737E-05 2.562784E-02 -3.268821E-06 -4.965166E-03 2.557365E-02 -1.057446E-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 -19.350849 130.092591 0.640571 -0.246183 -0.701238 2435097.949319 # Heliocentric elements and errors Epoch: 2435095.5000 = 1954/12/19 Mean Anomaly: 318.63712 +/- 0.000 Argument of Peri: 288.45301 +/- 0.000 Long of Asc Node: 250.53331 +/- 0.000 Inclination: 21.96177 +/- 0.000 Eccentricity: 0.08103759 +/- 0.0000 Semi-Major Axis: 42.25257950 +/- 0.0000 Time of Perihelion: 2446621.7105 +/- 0.0 Perihelion: 38.82853223 +/- 0.0000 Aphelion: 45.67662678 +/- 0.0000 Period (y) 274.6553 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -23.75526530 +/- 0.0000 Ecliptic Y 29.20718693 +/- 0.0000 Ecliptic Z -12.95677718 +/- 0.0000 Ecliptic XDOT -0.00192254 +/- 0.0000 Ecliptic YDOT -0.00198735 +/- 0.0000 Ecliptic ZDOT -0.00046387 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 39.81524008 +/- 0.0000 Geocenter to KBO 39.10280706 +/- 0.0000 # Hcoef: 3.66
The following table shows the complete astrometric record for 90568. 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 (90568) followed by the observatory code and reference code for the source of the astrometry.
1954 12 21.44896 08 29 42.11 -00 58 05.8 90568 261 k8696 1984 03 29.53430 11 10 18.98 -18 22 55.3 90568 260 k8696 1993 03 18.56000 12 09 46.30 -22 32 56.1 90568 260 k8696 1994 03 05.62595 12 17 33.77 -23 00 09.6 90568 260 k8696 1994 05 08.47715 12 12 35.13 -22 23 00.0 90568 260 k8696 1997 05 13.40209 12 32 21.63 -23 21 43.4 90568 260 k8696 1997 05 13.46459 12 32 21.34 -23 21 41.4 90568 260 k8696 2001 06 10.29860 12 58 05.79 -24 10 20.6 19.5R 90568 608 Cl3350 2004 04 13.28947 13 22 27.14 -25 26 07.0 19.6 90568 644 Ck4431 2004 04 13.31488 13 22 27.01 -25 26 06.2 19.4 90568 644 Ck4431 2004 04 13.34609 13 22 26.82 -25 26 05.1 19.0 90568 644 Ck4431 2004 04 13.94617 13 22 23.66 -25 25 46.9 90568 620 Ck4431 2004 04 14.01370 13 22 23.26 -25 25 44.3 90568 620 Ck4431 2004 04 14.18044 13 22 22.38 -25 25 39.5 19.4R 90568 H36 Ck4431 2004 04 14.22510 13 22 22.22 -25 25 37.1 19.9R 90568 H36 Ck4431 2004 04 14.23044 13 22 22.21 -25 25 37.5 18.8R 90568 333 Ck4431 2004 04 14.23590 13 22 22.20 -25 25 36.9 20.3R 90568 448 Ck4431 2004 04 14.23809 13 22 22.14 -25 25 37.7 18.5R 90568 333 Ck4431 2004 04 14.24013 13 22 22.17 -25 25 36.6 19.9R 90568 854 Ck4431 2004 04 14.24016 13 22 22.09 -25 25 36.9 20.1R 90568 H36 Ck4431 2004 04 14.24238 13 22 22.14 -25 25 37.5 19.7R 90568 448 Ck4431 2004 04 14.24786 13 22 22.24 -25 25 37.8 18.3R 90568 333 Ck4431 2004 04 14.24887 13 22 22.08 -25 25 37.6 20.1R 90568 448 Ck4431 2004 04 14.29726 13 22 21.88 -25 25 35.8 19.9R 90568 854 Ck4431 2004 04 14.30757 13 22 21.81 -25 25 34.8 19.2R 90568 926 Ck4431 2004 04 14.30905 13 22 21.83 -25 25 34.8 19.1 90568 644 Ck4431 2004 04 14.33021 13 22 21.67 -25 25 33.7 18.9 90568 644 Ck4431 2004 04 14.35148 13 22 21.56 -25 25 32.6 19.1 90568 644 Ck4431 2004 04 14.35380 13 22 21.54 -25 25 33.1 19.2R 90568 926 Ck4431 2004 04 19.96931 13 21 52.24 -25 22 26.4 19.8R 90568 620 Ck8696 2004 04 20.60963 13 21 48.94 -25 22 03.6 19.8V 90568 360 Ck5196 2004 04 20.63907 13 21 48.83 -25 22 02.8 90568 360 Ck5196 2004 04 20.64627 13 21 48.79 -25 22 02.8 90568 360 Ck5196 2004 04 22.02549 13 21 41.65 -25 21 14.2 19.8R 90568 620 Ck8696 2004 04 26.93185 13 21 16.75 -25 18 18.3 20.0R 90568 620 Ck8696 2004 04 27.97188 13 21 11.45 -25 17 39.3 19.3R 90568 620 Ck8696 2004 05 11.35493 13 20 08.32 -25 09 01.0 19.4R 90568 568 Ck9591 2004 05 11.44684 13 20 07.91 -25 08 57.4 90568 568 Ck9591 2004 05 16.91884 13 19 44.65 -25 05 18.0 90568 620 Ck8696 2004 05 26.01220 13 19 10.37 -24 59 11.3 19.0R 90568 304 Ck8696 2004 05 26.04230 13 19 10.27 -24 59 10.1 90568 304 Ck8696 2004 06 08.15829 13 18 32.08 -24 50 36.4 19.4R 90568 926 Ck8696 2004 06 08.20980 13 18 31.95 -24 50 34.6 19.6R 90568 926 Ck8696 2004 06 08.45467 13 18 31.37 -24 50 24.8 19.2R 90568 413 Ck8696 2004 06 09.28756 13 18 29.49 -24 49 53.4 19.7R 90568 568 Ck9043 2004 06 09.35183 13 18 29.34 -24 49 51.0 90568 568 Ck9043 2004 06 09.88262 13 18 28.11 -24 49 31.2 20.4R 90568 620 Ck8696
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 -0.09 0.00 1.57 2 29.2706 0.00 -0.09 0.00 -0.56 3 38.2399 0.00 -1.14 0.00 1.25 4 39.2038 0.00 0.32 0.00 0.39 5 39.3786 0.00 -0.50 0.00 0.04 6 42.3928 0.00 1.91 0.00 -0.17 7 42.3929 0.00 0.82 0.00 -0.87 8 46.4691 0.00 -0.50 0.00 -0.70 9 49.3110 0.00 0.25 0.00 0.12 10 49.3111 0.00 0.34 0.00 0.11 11 49.3111 0.00 -0.02 0.00 0.23 12 49.3128 0.00 -0.33 0.00 -0.63 13 49.3130 0.00 -0.94 0.00 -0.18 14 49.3134 0.00 -1.16 0.00 -0.72 15 49.3136 0.00 0.00 0.00 0.26 16 49.3136 0.00 0.22 0.00 -0.34 17 49.3136 0.00 0.52 0.00 0.09 18 49.3136 0.00 -0.22 0.00 -0.78 19 49.3136 0.00 0.39 0.00 0.26 20 49.3136 0.00 -0.75 0.00 -0.03 21 49.3136 0.00 0.14 0.00 -0.71 22 49.3136 0.00 ( 2.06) 0.00 ( -1.19) 23 49.3136 0.00 -0.24 0.00 -1.02 24 49.3138 0.00 0.61 0.00 -0.77 25 49.3138 0.00 0.38 0.00 -0.10 26 49.3138 0.00 0.78 0.00 -0.14 27 49.3138 0.00 0.07 0.00 0.28 28 49.3139 0.00 0.12 0.00 0.69 29 49.3139 0.00 0.03 0.00 0.11 30 49.3293 0.00 -0.30 0.00 -0.21 31 49.3310 0.00 -0.10 0.00 0.43 32 49.3311 0.00 0.58 0.00 0.21 33 49.3311 0.00 0.54 0.00 -0.04 34 49.3349 0.00 0.13 0.00 0.32 35 49.3483 0.00 0.69 0.00 -0.72 36 49.3512 0.00 -0.72 0.00 -0.20 37 49.3878 0.00 0.08 0.00 0.49 38 49.3881 0.00 0.13 0.00 0.41 39 49.4031 0.00 -0.37 0.00 0.42 40 49.4280 0.00 -0.23 0.00 0.52 41 49.4280 0.00 -0.14 0.00 0.51 42 49.4640 0.00 -0.14 0.00 0.21 43 49.4641 0.00 -0.20 0.00 0.05 44 49.4648 0.00 -0.36 0.00 0.35 45 49.4670 0.00 0.05 0.00 0.44 46 49.4672 0.00 0.06 0.00 0.41 47 49.4687 0.00 -0.74 0.00 0.29
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.
90568 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 41.714 41.714 41.714 ecceobj 0.072 0.072 0.072 incobj 22.022 22.022 22.022 qmin 38.246 38.256 38.230 qmax 45.970 45.965 45.951 amean 41.997 41.994 41.997 amin 41.679 41.676 41.672 amax 42.341 42.340 42.335 emean 0.072 0.073 0.073 emin 0.060 0.060 0.060 emax 0.086 0.086 0.086 imean 23.496 23.493 23.495 imin 23.074 23.070 23.070 imax 23.888 23.881 23.884 fracstop 1.000 1.000 1.000 cjmean 2.877 2.877 2.877 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 174.6 174.7 174.2 kozaiamp 180.0 180.0 180.0