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: 90377 # Created Sun May 19 01:36:33 2013 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 82 observations of 85 # Arc: 19.16y # First observation: 1990/09/25 # Last observation: 2009/11/22 # Chi-squared of fit: 737.10 DOF: 158 RMS: 0.53 # Min/Max residuals: -1.59 1.74 # Exact a, adot, b, bdot, g, gdot: 1.138134E-05 8.500019E-03 -1.253477E-06 -3.965905E-04 1.070425E-02 -3.852012E-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 -11.715841 41.546724 0.635341 -0.157723 -0.760729 2448159.941292 # Heliocentric elements and errors Epoch: 2448160.5000 = 1990/09/26 Mean Anomaly: 357.47400 +/- 0.000 Argument of Peri: 311.15519 +/- 0.000 Long of Asc Node: 144.51406 +/- 0.000 Inclination: 11.93389 +/- 0.000 Eccentricity: 0.85590353 +/- 0.0000 Semi-Major Axis: 528.34251370 +/- 0.0000 Time of Perihelion: 2479285.0598 +/- 0.0 Perihelion: 76.13229114 +/- 0.0000 Aphelion: 980.55273627 +/- 0.0000 Period (y) 12144.5531 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 69.46231615 +/- 0.0000 Ecliptic Y 60.70870809 +/- 0.0000 Ecliptic Z -18.96993990 +/- 0.0000 Ecliptic XDOT -0.00218409 +/- 0.0000 Ecliptic YDOT 0.00097123 +/- 0.0000 Ecliptic ZDOT 0.00010082 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 94.18344467 +/- 0.0000 Geocenter to KBO 93.42136220 +/- 0.0000 # Hcoef: 1.59
The following table shows the complete astrometric record for 90377. 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 (90377) followed by the observatory code and reference code for the source of the astrometry.
1990 09 25.44063 02 50 51.72 +04 07 48.0 20.5R 90377 261 k1204 1991 09 11.46806 02 53 03.54 +04 18 01.6 20.6R 90377 261 k1204 2001 09 26.48667 03 12 35.20 +05 31 31.2 90377 644 Ck1204 2001 10 24.52713 03 11 44.54 +05 25 59.1 90377 644 Ck1204 2002 10 09.43293 03 14 19.47 +05 36 50.3 90377 644 Ck1204 2002 10 29.43127 03 13 39.41 +05 32 59.3 90377 644 Ck1204 2002 12 13.23936 03 12 02.20 +05 27 21.1 21. R 90377 644 Cl2196 2003 08 30.41504 03 17 10.06 +05 52 13.3 90377 675 Ck1204 2003 09 29.38282 03 16 41.92 +05 46 45.3 90377 675 Ck1204 2003 11 14.27288 03 15 10.09 +05 38 16.5 20.8R 90377 675 Ck1204 2003 11 14.33594 03 15 09.97 +05 38 15.4 20.5R 90377 675 Ck1204 2003 11 14.40149 03 15 09.83 +05 38 14.9 20.7R 90377 675 Ck1204 2003 11 20.27501 03 14 56.51 +05 37 25.3 21.4 90377 926 Ck1204 2003 11 20.33089 03 14 56.30 +05 37 25.4 22.2R 90377 926 Ck1204 2003 11 25.28100 03 14 45.30 +05 36 47.5 90377 568 Ck1204 2003 11 27.02955 03 14 41.44 +05 36 35.5 90377 807 Ck1204 2003 11 27.13343 03 14 41.21 +05 36 34.8 90377 807 Ck1204 2003 11 28.03145 03 14 39.23 +05 36 28.9 90377 807 Ck1204 2003 11 28.11670 03 14 39.05 +05 36 28.5 90377 807 Ck1204 2003 12 04.05591 03 14 26.25 +05 35 53.6 20.5R 90377 807 Ck1204 2003 12 04.09737 03 14 26.16 +05 35 53.5 20.7R 90377 807 Ck1204 2003 12 14.06076 03 14 06.11 +05 35 11.1 90377 807 Ck1204 2003 12 14.14978 03 14 05.96 +05 35 10.6 90377 807 Ck1204 2003 12 31.12274 03 13 37.64 +05 34 50.7 20.7R 90377 807 Ck1204 2003 12 31.15813 03 13 37.59 +05 34 50.5 20.9R 90377 807 Ck1204 2003 12 31.19148 03 13 37.53 +05 34 50.8 20.6R 90377 807 Ck1204 2004 03 13.76672 03 13 46.98 +05 45 08.3 90377 246 Ck1204 2004 03 14.76461 03 13 48.60 +05 45 21.0 20.7R 90377 246 Ck1204 2004 03 14.77174 03 13 48.64 +05 45 22.7 90377 246 Ck1204 2004 03 14.77351 03 13 48.68 +05 45 22.0 90377 246 Ck1204 2004 03 14.77448 03 13 48.70 +05 45 21.2 90377 246 Ck1204 2004 03 15.11461 03 13 49.23 +05 45 26.5 90377 333 Ck1204 2004 03 17.11649 03 13 52.75 +05 45 54.1 20.9R 90377 926 Ck1204 2004 03 17.80351 03 13 54.13 +05 46 02.5 20.8R 90377 204 Ck1204 2004 03 18.11597 03 13 54.57 +05 46 07.5 20.8R 90377 926 Ck1204 2004 03 19.11898 03 13 56.39 +05 46 21.4 90377 926 Ck1204 2004 09 06.49288 03 19 12.05 +05 58 47.0 20.7R 90377 695 Cl4028 2004 09 07.49615 03 19 11.39 +05 58 36.6 20.7R 90377 695 Cl4028 2004 09 18.08079 03 19 01.87 +05 56 39.8 90377 246 Cl5152 2004 09 18.08219 03 19 01.85 +05 56 41.0 90377 246 Cl5152 2004 09 18.10552 03 19 01.87 +05 56 40.1 20.3R 90377 204 Cl5152 2004 09 18.98934 03 19 00.85 +05 56 29.4 90377 246 Cl5152 2004 09 18.99145 03 19 00.83 +05 56 29.4 90377 246 Cl5152 2004 09 18.99353 03 19 00.81 +05 56 29.7 90377 246 Cl5152 2004 09 19.14367 03 19 00.98 +05 56 27.9 90377 204 Cl5152 2004 10 11.00228 03 18 27.86 +05 52 10.4 20.7R 90377 213 Cl7408 2004 10 11.02993 03 18 27.78 +05 52 10.0 20.7R 90377 213 Cl7408 2004 10 15.96099 03 18 18.51 +05 51 13.4 20.8R 90377 213 Cl8230 2004 10 16.00865 03 18 18.38 +05 51 14.1 20.8R 90377 213 Cl8230 2004 11 16.92013 03 17 08.686 +05 45 39.42 20.6R 90377 176 Cm0257 2004 11 17.93921 03 17 06.320 +05 45 30.87 20.6R 90377 176 Cm0257 2004 12 10.22765 03 16 18.01 +05 43 13.7 21.0R 90377 G98 Cm3425 2004 12 11.24828 03 16 15.96 +05 43 09.9 21.0R 90377 G98 Cm3425 2004 12 12.25523 03 16 13.99 +05 43 06.6 21.0R 90377 G98 Cm3425 2004 12 13.19287 03 16 12.17 +05 43 03.5 20.8R 90377 G98 Cm3425 2005 01 14.80565 03 15 25.44 +05 43 21.5 20.4V 90377 240 Ct6836 2005 01 29.11722 03 15 17.80 +05 44 46.3 90377 701 Cm7661 2005 01 30.14696 03 15 17.58 +05 44 54.6 90377 701 Cm7661 2005 01 31.12318 03 15 17.42 +05 45 02.8 90377 701 Cm7661 2005 03 04.14167 03 15 36.22 +05 50 43.3 21.3V 90377 G95 Cm7661 2005 09 13.08772 03 21 14.06 +06 05 32.3 20.8R 90377 204 Co2409 2005 11 08.00740 03 19 36.80 +05 54 56.7 20.8R 90377 213 Cp0438 2005 11 08.02519 03 19 36.77 +05 54 57.1 20.8R 90377 213 Cp0438 2006 01 03.88475 03 17 43.41 +05 50 39.1 20.0R 90377 235 Cp8602 2007 10 12.40501 03 24 51.141 +06 15 50.25 21.3R 90377 675 C~0B98 2007 10 12.44643 03 24 51.064 +06 15 50.17 21.0R 90377 675 C~0B98 2007 10 14.41002 03 24 47.413 +06 15 26.40 21.0R 90377 675 C~0B98 2007 10 14.45649 03 24 47.314 +06 15 26.89 21.0R 90377 675 C~0B98 2007 11 08.22116 03 23 54.80 +06 10 55.6 20.9R 90377 H82 Cw7881 2007 11 08.25394 03 23 54.66 +06 10 55.3 21.1R 90377 H82 Cw7881 2007 11 08.28672 03 23 54.57 +06 10 56.0 20.9R 90377 H82 Cw7881 2008 10 23.21467 03 26 38.79 +06 21 38.0 21.0R 90377 H82 C~00H1 2008 10 23.23622 03 26 38.71 +06 21 37.2 20.8R 90377 H82 C~00H1 2008 10 23.25777 03 26 38.55 +06 21 38.2 20.6R 90377 H82 C~00H1 2008 10 23.32243 03 26 38.48 +06 21 36.0 20.6R 90377 H82 C~00H1 2008 10 23.34398 03 26 38.44 +06 21 36.3 20.7R 90377 H82 C~00H1 2008 11 07.32602 03 26 05.38 +06 18 57.2 20.1C 90377 H10 C~03vw 2009 11 13.26988 03 28 03.66 +06 26 08.6 20.6R 90377 735 C~0BW3 2009 11 13.31411 03 28 03.57 +06 26 07.7 20.6R 90377 735 C~0BW3 2009 11 17.24602 03 27 54.35 +06 25 33.8 20.9R 90377 735 C~0BW3 2009 11 17.28953 03 27 54.28 +06 25 32.7 20.5R 90377 735 C~0BW3 2009 11 22.22095 03 27 42.84 +06 24 53.2 20.4R 90377 735 C~0C02 2009 11 22.24801 03 27 42.78 +06 24 53.3 20.7R 90377 735 C~0C02 2010 01 05.240888 03 26 16.853 +06 22 38.38 20.6R 90377 F65 C~0CyX 2010 01 05.243336 03 26 16.851 +06 22 38.29 20.5R 90377 F65 C~0CyX
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 0.08 2 0.9611 0.00 -0.34 0.00 -0.33 3 11.0035 0.00 0.52 0.00 -0.76 4 11.0803 0.00 0.59 0.00 -0.43 5 12.0383 0.00 0.28 0.00 -0.02 6 12.0931 0.00 0.37 0.00 0.06 7 12.2157 0.00 0.16 0.00 0.07 8 12.9281 0.00 0.37 0.00 -0.41 9 13.0101 0.00 -0.30 0.00 -0.01 10 13.1357 0.00 -0.26 0.00 0.43 11 13.1359 0.00 0.12 0.00 -0.11 12 13.1361 0.00 0.28 0.00 -0.03 13 13.1522 0.00 0.00 0.00 -0.08 14 13.1523 0.00 -1.23 0.00 0.46 15 13.1659 0.00 -0.05 0.00 -0.27 16 13.1707 0.00 0.05 0.00 -0.30 17 13.1710 0.00 0.08 0.00 -0.30 18 13.1734 0.00 -0.09 0.00 -0.25 19 13.1737 0.00 0.05 0.00 -0.09 20 13.1899 0.00 -0.42 0.00 0.25 21 13.1900 0.00 -0.44 0.00 0.37 22 13.2173 0.00 -0.54 0.00 0.47 23 13.2175 0.00 -0.20 0.00 0.25 24 13.2640 0.00 0.27 0.00 0.72 25 13.2641 0.00 0.29 0.00 0.50 26 13.2642 0.00 0.10 0.00 0.77 27 13.4656 0.00 0.69 0.00 1.06 28 13.4684 0.00 -0.47 0.00 -0.03 29 13.4684 0.00 -0.05 0.00 1.57 30 13.4684 0.00 0.50 0.00 0.85 31 13.4684 0.00 0.78 0.00 0.03 32 13.4693 0.00 -0.07 0.00 0.59 33 13.4748 0.00 -0.37 0.00 0.30 34 13.4767 0.00 1.60 0.00 -0.90 35 13.4776 0.00 -0.39 0.00 -0.31 36 13.4803 0.00 -1.03 0.00 -0.52 37 13.9495 0.00 -0.19 0.00 -0.02 38 13.9522 0.00 -0.04 0.00 0.03 39 13.9812 0.00 -0.20 0.00 -0.79 40 13.9812 0.00 -0.48 0.00 0.42 41 13.9813 0.00 0.21 0.00 -0.21 42 13.9837 0.00 -0.27 0.00 -0.83 43 13.9837 0.00 -0.53 0.00 -0.80 44 13.9837 0.00 -0.80 0.00 -0.48 45 13.9841 0.00 ( 4.37) 0.00 ( -0.57) 46 14.0440 0.00 1.74 0.00 0.32 47 14.0441 0.00 1.31 0.00 0.25 48 14.0576 0.00 ( 2.32) 0.00 ( 1.96) 49 14.0577 0.00 ( 1.79) 0.00 ( 3.22) 50 14.1451 0.00 0.29 0.00 -0.28 51 14.1478 0.00 -0.40 0.00 -0.36 52 14.2089 0.00 -0.16 0.00 -0.22 53 14.2117 0.00 -0.49 0.00 -0.16 54 14.2144 0.00 -0.37 0.00 0.13 55 14.2170 0.00 -0.39 0.00 0.17 56 14.3063 0.00 0.31 0.00 0.23 57 14.3455 0.00 0.39 0.00 -0.30 58 14.3483 0.00 0.17 0.00 0.18 59 14.3509 0.00 0.00 0.00 0.77 60 14.4386 0.00 -0.14 0.00 -0.12 61 14.9669 0.00 -0.20 0.00 0.21 62 15.1200 0.00 0.54 0.00 -0.89 63 15.1200 0.00 0.70 0.00 -0.32 64 15.2757 0.00 -1.59 0.00 -1.07 65 17.0458 0.00 -0.19 0.00 -0.12 66 17.0459 0.00 -0.19 0.00 0.29 67 17.0513 0.00 -0.21 0.00 -0.41 68 17.0514 0.00 -0.35 0.00 0.62 69 17.1192 0.00 0.72 0.00 0.03 70 17.1193 0.00 -0.23 0.00 0.05 71 17.1194 0.00 -0.44 0.00 1.07 72 18.0774 0.00 1.29 0.00 0.38 73 18.0775 0.00 0.77 0.00 -0.18 74 18.0775 0.00 -0.94 0.00 1.06 75 18.0777 0.00 0.07 0.00 -0.41 76 18.0778 0.00 0.16 0.00 0.13 77 18.1188 0.00 0.32 0.00 -0.89 78 19.1344 0.00 0.07 0.00 0.39 79 19.1345 0.00 0.29 0.00 -0.11 80 19.1453 0.00 -0.61 0.00 0.14 81 19.1454 0.00 -0.11 0.00 -0.59 82 19.1589 0.00 0.36 0.00 -0.75 83 19.1590 0.00 0.42 0.00 -0.45 84 19.2794 0.00 -0.16 0.00 0.33 85 19.2794 0.00 -0.14 0.00 0.23
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.
90377 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 550.339 550.314 550.363 ecceobj 0.861 0.861 0.861 incobj 11.925 11.925 11.925 qmin 69.507 69.507 69.506 qmax 1047.534 1049.187 1047.041 amean 507.810 507.790 507.831 amin 475.686 475.826 477.845 amax 561.867 562.691 561.621 emean 0.850 0.850 0.850 emin 0.837 0.837 0.837 emax 0.864 0.865 0.864 imean 10.711 10.711 10.711 imin 10.416 10.416 10.412 imax 11.032 11.033 11.027 excite_mean 0.870 0.870 0.870 fracstop 1.000 1.000 1.000 cjmean 4.314 4.314 4.314 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 312.6 312.6 312.6 kozaiamp 3.2 3.2 3.1