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: 65489 # Created Wed May 22 01:36:32 2013 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 80 observations of 80 # Arc: 25.29y # First observation: 1987/01/31 # Last observation: 2012/05/18 # Chi-squared of fit: 523.95 DOF: 154 RMS: 0.45 # Min/Max residuals: -1.85 1.68 # Exact a, adot, b, bdot, g, gdot: 3.192523E-05 1.119291E-01 8.988636E-06 2.472800E-02 5.811115E-02 -1.642261E-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 -19.397553 117.000588 -0.244254 -0.319202 -0.906587 2446827.018669 # Heliocentric elements and errors Epoch: 2446826.5000 = 1987/01/31 Mean Anomaly: 359.10815 +/- 0.000 Argument of Peri: 319.61946 +/- 0.000 Long of Asc Node: 171.92825 +/- 0.000 Inclination: 22.31299 +/- 0.000 Eccentricity: 0.82191667 +/- 0.0000 Semi-Major Axis: 99.97412778 +/- 0.0000 Time of Perihelion: 2447731.0205 +/- 0.0 Perihelion: 17.80372557 +/- 0.0000 Aphelion: 182.14452999 +/- 0.0000 Period (y) 999.6308 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -8.01963569 +/- 0.0000 Ecliptic Y 15.20262679 +/- 0.0000 Ecliptic Z -5.71513731 +/- 0.0000 Ecliptic XDOT -0.00454146 +/- 0.0000 Ecliptic YDOT -0.00269263 +/- 0.0000 Ecliptic ZDOT 0.00135580 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 18.11352076 +/- 0.0000 Geocenter to KBO 17.20851665 +/- 0.0000 # Hcoef: 6.22
The following table shows the complete astrometric record for 65489. 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 (65489) followed by the observatory code and reference code for the source of the astrometry.
1987 01 31.51803 07 41 28.11 +01 41 43.7 65489 260 i0218 1987 01 31.58747 07 41 27.48 +01 41 48.2 65489 260 i0218 1988 03 10.42051 08 03 29.59 +02 40 08.3 65489 260 i0218 1988 03 10.48996 08 03 29.24 +02 40 12.7 65489 260 i0218 1991 02 06.30417 09 28 59.61 +02 29 50.6 65489 261 i0218 1991 02 06.36319 09 28 59.12 +02 29 54.1 65489 261 i0218 1995 02 26.29375 11 07 39.36 +02 57 14.4 65489 261 i0218 1995 02 26.35625 11 07 38.89 +02 57 18.9 65489 261 i0218 1996 04 10.16806 11 24 37.72 +03 44 47.6 65489 261 i0218 1996 04 10.21667 11 24 37.36 +03 44 51.0 65489 261 i0218 1996 04 20.42136 11 23 38.33 +03 54 52.6 20.0R 65489 566 Ci0218 1998 04 30.26042 12 03 37.11 +03 48 18.9 65489 261 i0218 1998 04 30.30556 12 03 36.89 +03 48 21.2 65489 261 i0218 2001 03 27.55243 12 59 18.55 +02 50 52.6 65489 608 Ci0218 2002 03 23.46414 13 14 47.01 +02 37 29.1 19.9R 65489 608 Ci0218 2002 04 02.51440 13 13 38.77 +02 47 31.6 20.3R 65489 644 Ci0218 2002 04 13.24827 13 12 23.77 +02 57 35.4 20.0 65489 644 Ci1844 2002 04 13.26955 13 12 23.62 +02 57 36.0 20.4 65489 644 Ci1844 2002 04 13.28957 13 12 23.50 +02 57 37.3 20.2 65489 644 Ci1844 2002 04 18.50912 13 11 47.21 +03 02 08.2 19.9R 65489 608 Ci0218 2002 05 07.16927 13 09 46.76 +03 15 38.7 20.2R 65489 644 Ci0218 2002 05 07.18944 13 09 46.66 +03 15 39.7 20.1R 65489 644 Ci0218 2002 05 07.21064 13 09 46.46 +03 15 40.3 20.1R 65489 644 Ci0218 2002 05 09.44046 13 09 33.59 +03 16 58.8 65489 608 Ci0218 2002 05 16.33147 13 08 56.42 +03 20 27.6 19.4R 65489 608 Ci0218 2003 03 22.27735 13 28 52.17 +02 27 11.2 20.0 65489 644 Ch8428 2003 03 22.36260 13 28 51.57 +02 27 16.4 20.0 65489 644 Ch8428 2003 03 22.42846 13 28 51.27 +02 27 19.8 20.3 65489 644 Ch8428 2003 04 02.24127 13 27 41.36 +02 37 50.6 19.8R 65489 675 Ch8428 2003 04 02.28499 13 27 41.07 +02 37 52.4 19.6R 65489 675 Ch8428 2003 04 25.22373 13 25 05.20 +02 57 35.6 19.5R 65489 675 Ch8428 2003 04 25.29333 13 25 04.72 +02 57 38.9 19.6R 65489 675 Ch8428 2003 05 03.84534 13 24 09.40 +03 03 33.2 19.9R 65489 540 Ch8428 2003 05 03.90691 13 24 08.99 +03 03 36.3 65489 246 Ch8428 2003 05 03.90976 13 24 09.02 +03 03 36.2 65489 246 Ch8428 2003 05 03.91203 13 24 09.01 +03 03 35.4 65489 246 Ch8428 2003 05 03.91556 13 24 09.00 +03 03 35.3 65489 246 Ch8428 2003 05 03.91706 13 24 08.94 +03 03 36.5 65489 246 Ch8428 2003 05 03.91977 13 24 08.93 +03 03 36.0 65489 246 Ch8428 2003 05 03.94169 13 24 08.75 +03 03 37.0 20.1R 65489 540 Ch8428 2003 05 05.50991 13 23 59.06 +03 04 36.7 20.3V 65489 360 Ci0218 2003 05 05.56975 13 23 58.71 +03 04 38.9 65489 360 Ci0218 2003 05 05.57994 13 23 58.64 +03 04 39.3 65489 360 Ci0218 2003 05 09.97126 13 23 32.24 +03 07 11.5 19.8R 65489 J87 Ci0218 2003 05 09.98927 13 23 32.23 +03 07 11.7 19.9R 65489 J87 Ci0218 2003 05 10.02432 13 23 31.99 +03 07 14.0 20.2R 65489 J87 Ci0218 2003 05 31.19729 13 21 47.83 +03 15 19.6 20.2R 65489 675 Ci1844 2003 05 31.24691 13 21 47.64 +03 15 20.3 20.2R 65489 675 Ci1844 2003 06 21.21134 13 20 54.47 +03 16 04.9 20.6R 65489 333 Ci1844 2003 06 22.21385 13 20 53.25 +03 15 56.7 20.5R 65489 333 Ci1844 2004 03 17.06315 13 42 15.92 +02 14 08.4 20. R 65489 621 Ck2806 2004 03 17.07482 13 42 15.87 +02 14 09.3 65489 621 Ck2806 2004 03 17.08652 13 42 15.78 +02 14 09.6 65489 621 Ck2806 2004 03 18.06056 13 42 10.42 +02 15 05.0 65489 621 Ck2806 2004 05 27.12053 13 35 02.33 +03 04 36.5 19.8R 65489 304 Ck8913 2004 05 27.17102 13 35 02.10 +03 04 37.3 65489 304 Ck8913 2006 05 02.94816 14 00 58.68 +02 34 32.2 21. R 65489 621 Cr1538 2006 05 02.96091 14 00 58.56 +02 34 32.7 65489 621 Cr1538 2006 05 05.01022 14 00 45.72 +02 35 44.4 21. R 65489 621 Cr1538 2011 05 09.24529 14 47 41.772 +01 56 51.41 65489 309 C~0X4K 2011 05 09.24704 14 47 41.756 +01 56 51.38 65489 309 C~0X4K 2011 05 09.24877 14 47 41.747 +01 56 51.48 65489 309 C~0X4K 2011 05 09.25094 14 47 41.729 +01 56 51.58 65489 309 C~0X4K 2011 05 09.25272 14 47 41.718 +01 56 51.63 65489 309 C~0X4K 2011 05 09.25450 14 47 41.705 +01 56 51.69 65489 309 C~0X4K 2011 05 09.25729 14 47 41.688 +01 56 51.81 65489 309 C~0X4K 2011 05 09.26012 14 47 41.672 +01 56 51.88 65489 309 C~0X4K 2011 05 09.26293 14 47 41.650 +01 56 51.90 65489 309 C~0X4K 2011 05 09.26575 14 47 41.640 +01 56 52.05 65489 309 C~0X4K 2011 05 09.26858 14 47 41.618 +01 56 52.08 65489 309 C~0X4K 2011 05 09.27122 14 47 41.619 +01 56 52.14 65489 309 C~0X4K 2011 05 09.27296 14 47 41.603 +01 56 52.14 65489 309 C~0X4K 2011 05 09.27471 14 47 41.594 +01 56 52.23 65489 309 C~0X4K 2011 05 09.27740 14 47 41.562 +01 56 52.20 65489 309 C~0X4K 2011 05 09.28034 14 47 41.547 +01 56 52.24 65489 309 C~0X4K 2011 05 09.28329 14 47 41.529 +01 56 52.45 65489 309 C~0X4K 2011 05 09.28623 14 47 41.523 +01 56 52.44 65489 309 C~0X4K 2012 05 18.36776 14 54 37.653 +01 53 43.01 21.8w 65489 F51 C~0h3P 2012 05 18.38135 14 54 37.560 +01 53 43.44 21.7w 65489 F51 C~0h3P 2012 05 18.39497 14 54 37.503 +01 53 43.67 21.7w 65489 F51 C~0h3P
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 -0.24 0.00 0.89 2 0.0002 0.00 -0.37 0.00 0.21 3 1.1058 0.00 0.68 0.00 0.44 4 1.1060 0.00 0.03 0.00 -0.47 5 4.0158 0.00 0.38 0.00 0.27 6 4.0160 0.00 1.13 0.00 0.03 7 8.0706 0.00 -0.90 0.00 -0.25 8 8.0707 0.00 -0.23 0.00 -0.29 9 9.1900 0.00 -0.15 0.00 0.05 10 9.1901 0.00 -0.79 0.00 0.40 11 9.2181 0.00 0.16 0.00 0.00 12 11.2436 0.00 -0.05 0.00 -0.56 13 11.2438 0.00 0.26 0.00 -0.28 14 14.1520 0.00 0.00 0.00 0.26 15 15.1402 0.00 -0.14 0.00 -0.24 16 15.1677 0.00 -0.53 0.00 -0.16 17 15.1971 0.00 0.24 0.00 0.33 18 15.1971 0.00 0.26 0.00 -0.21 19 15.1972 0.00 0.60 0.00 0.01 20 15.2115 0.00 0.00 0.00 -0.45 21 15.2626 0.00 -0.05 0.00 -0.39 22 15.2626 0.00 0.26 0.00 -0.11 23 15.2627 0.00 -0.83 0.00 -0.27 24 15.2688 0.00 0.00 0.00 0.64 25 15.2876 0.00 -0.48 0.00 -0.88 26 16.1362 0.00 0.93 0.00 0.41 27 16.1365 0.00 -0.04 0.00 0.56 28 16.1366 0.00 1.68 0.00 0.05 29 16.1663 0.00 0.31 0.00 0.45 30 16.1664 0.00 0.41 0.00 -0.24 31 16.2292 0.00 0.49 0.00 0.22 32 16.2294 0.00 0.36 0.00 0.41 33 16.2528 0.00 0.26 0.00 -0.30 34 16.2529 0.00 -0.03 0.00 0.45 35 16.2530 0.00 0.69 0.00 0.24 36 16.2530 0.00 0.76 0.00 -0.64 37 16.2530 0.00 0.95 0.00 -0.88 38 16.2530 0.00 0.19 0.00 0.26 39 16.2530 0.00 0.30 0.00 -0.34 40 16.2530 0.00 -0.31 0.00 -0.18 41 16.2573 0.00 0.05 0.00 0.78 42 16.2575 0.00 0.43 0.00 0.78 43 16.2575 0.00 0.34 0.00 0.80 44 16.2696 0.00 -0.16 0.00 0.16 45 16.2696 0.00 1.30 0.00 -0.23 46 16.2697 0.00 0.83 0.00 0.92 47 16.3277 0.00 -0.09 0.00 -0.21 48 16.3278 0.00 0.01 0.00 -0.14 49 16.3852 0.00 -0.04 0.00 -0.34 50 16.3879 0.00 -1.85 0.00 0.20 51 17.1240 0.00 -0.37 0.00 -0.19 52 17.1240 0.00 -0.14 0.00 0.04 53 17.1241 0.00 -0.51 0.00 -0.33 54 17.1267 0.00 -0.18 0.00 -1.02 55 17.3186 0.00 -0.21 0.00 -0.21 56 17.3187 0.00 -0.16 0.00 -0.22 57 19.2510 0.00 -0.11 0.00 -0.29 58 19.2510 0.00 -0.68 0.00 -0.25 59 19.2567 0.00 -0.59 0.00 -1.19 60 24.2676 0.00 0.23 0.00 0.10 61 24.2676 0.00 0.14 0.00 0.02 62 24.2676 0.00 0.16 0.00 0.07 63 24.2676 0.00 0.08 0.00 0.11 64 24.2676 0.00 0.08 0.00 0.11 65 24.2676 0.00 0.04 0.00 0.12 66 24.2676 0.00 0.03 0.00 0.16 67 24.2676 0.00 0.04 0.00 0.15 68 24.2676 0.00 -0.04 0.00 0.09 69 24.2676 0.00 0.06 0.00 0.16 70 24.2676 0.00 -0.02 0.00 0.11 71 24.2676 0.00 0.23 0.00 0.09 72 24.2676 0.00 0.14 0.00 0.04 73 24.2676 0.00 0.16 0.00 0.08 74 24.2677 0.00 -0.08 0.00 -0.03 75 24.2677 0.00 -0.05 0.00 -0.07 76 24.2677 0.00 -0.06 0.00 0.06 77 24.2677 0.00 0.11 0.00 -0.04 78 25.2946 0.00 0.11 0.00 -0.32 79 25.2946 0.00 -0.13 0.00 -0.18 80 25.2947 0.00 0.17 0.00 -0.24
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.
65489 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 99.691 99.695 99.688 ecceobj 0.822 0.822 0.822 incobj 22.328 22.328 22.328 qmin 17.153 16.830 17.181 qmax 190.941 212.146 190.919 amean 96.524 104.004 98.712 amin 90.374 97.780 94.735 amax 104.374 114.872 104.363 emean 0.816 0.830 0.820 emin 0.800 0.816 0.811 emax 0.829 0.847 0.829 imean 21.493 20.896 21.590 imin 21.096 19.797 21.206 imax 21.794 21.810 21.889 excite_mean 0.895 0.904 0.899 fracstop 0.032 0.088 0.022 cjmean 2.244 2.228 2.241 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 324.2 333.1 322.8 kozaiamp 5.5 13.5 3.7