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: 98WG24 # Created Fri May 2 02:36:26 2008 # Orbit generated from Bernstein formalism # Fitting 30 observations of 31 # Arc: 7.00y # First observation: 1998/11/18 # Last observation: 2005/11/17 Preliminary a, adot, b, bdot, g, gdot: -0.000062 0.025751 -0.000022 0.000978 0.025640 0.000000 # Chi-squared of fit: 26.32 DOF: 54 RMS: 0.17 # Min/Max residuals: -0.54 0.32 # Exact a, adot, b, bdot, g, gdot: 1.568456E-05 2.522071E-02 8.290140E-07 9.579375E-04 2.475536E-02 -1.985458E-03 # Covariance matrix: 1.9673E-13 -7.2126E-14 1.3466E-15 -1.7025E-15 1.0494E-13 -2.4770E-13 -7.2126E-14 1.2071E-13 -3.6085E-15 4.3218E-15 9.3816E-14 6.3245E-13 1.3466E-15 -3.6085E-15 9.3774E-14 -2.3659E-14 -3.6121E-15 -2.1166E-14 -1.7025E-15 4.3218E-15 -2.3659E-14 1.2441E-14 4.1638E-15 2.5310E-14 1.0494E-13 9.3816E-14 -3.6121E-15 4.1638E-15 3.4701E-13 6.1194E-13 -2.4770E-13 6.3245E-13 -2.1166E-14 2.5310E-14 6.1194E-13 3.7044E-12 # lat0 lon0 xBary yBary zBary JD0 -0.495222 76.259188 0.335703 -0.008225 -0.925422 2451135.932941 # Heliocentric elements and errors Epoch: 2451130.5000 = 1998/11/13 Mean Anomaly: 323.97447 +/- 0.023 Argument of Peri: 33.22984 +/- 0.030 Long of Asc Node: 88.33909 +/- 0.001 Inclination: 2.22550 +/- 0.000 Eccentricity: 0.12731254 +/- 0.0001 Semi-Major Axis: 45.73283800 +/- 0.0047 Time of Perihelion: 2462434.9251 +/- 6.9 Perihelion: 39.91047408 +/- 0.0057 Aphelion: 51.55520191 +/- 0.0066 Period (y) 309.2790 +/- 0.05 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 10.14843091 +/- 0.0002 Ecliptic Y 40.05641740 +/- 0.0009 Ecliptic Z -0.34910302 +/- 0.0000 Ecliptic XDOT -0.00276202 +/- 0.0000 Ecliptic YDOT 0.00045925 +/- 0.0000 Ecliptic ZDOT 0.00010781 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.32346909 +/- 0.0009 Geocenter to KBO 40.39530025 +/- 0.0010 # Hcoef: 6.59
The following table shows the complete astrometric record for 98WG24. 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 (98WG24) followed by the observatory code and reference code for the source of the astrometry.
1998 11 18.43221 05 00 31.48 +22 14 15.4 22.1R 98WG24 695 Ca3208 1998 11 18.50365 05 00 31.12 +22 14 15.0 98WG24 695 Ca3208 1998 11 19.39534 05 00 26.67 +22 14 08.7 22.4R 98WG24 695 Ca3208 1998 11 19.50699 05 00 26.10 +22 14 08.0 98WG24 695 Ca3208 1999 01 22.29072 04 55 16.53 +22 07 13.1 22.8R 98WG24 568 Ca5544 1999 01 22.34875 04 55 16.33 +22 07 12.8 98WG24 568 Ca5544 1999 01 23.33334 04 55 13.05 +22 07 08.7 98WG24 568 Ca5544 1999 11 30.32365 05 05 44.82 +22 24 46.3 22.7R 98WG24 695 Ca9916 1999 11 30.33074 05 05 44.79 +22 24 46.4 22.5R 98WG24 695 Ca9916 1999 12 28.22900 05 03 16.68 +22 21 46.3 22.4R 98WG24 695 Ca9916 1999 12 28.23622 05 03 16.69 +22 21 46.2 22.5R 98WG24 695 Ca9916 1999 12 28.32757 05 03 16.15 +22 21 45.1 98WG24 695 Ca9916 1999 12 29.29841 05 03 11.30 +22 21 39.9 22.6R 98WG24 695 Ca9916 1999 12 29.30588 05 03 11.27 +22 21 39.8 22.8R 98WG24 695 Ca9916 1999 12 29.36427 05 03 10.96 +22 21 39.7 22.3R 98WG24 695 Ca9916 1999 12 29.37226 05 03 10.95 +22 21 39.6 22.3R 98WG24 695 Ca9916 2000 01 05.14468 05 02 38.14 +22 21 00.3 23.0R 98WG24 697 Ca9916 2000 01 05.22955 05 02 37.75 +22 20 59.6 23.0R 98WG24 697 Ca9916 2000 01 05.30292 05 02 37.39 +22 20 59.4 23.1R 98WG24 697 Ca9916 2000 11 23.45178 05 12 33.15 +22 36 22.4 22.8R 98WG24 695 Cc2190 2000 11 23.50455 05 12 32.87 +22 36 21.8 98WG24 695 Cc2190 2000 11 26.35848 05 12 18.14 +22 36 06.3 22.8R 98WG24 695 Cc2190 2000 11 26.45245 05 12 17.63 +22 36 05.7 22.9R 98WG24 695 Cc2190 2000 11 27.41353 05 12 12.62 +22 36 00.5 22.5R 98WG24 695 Cc2190 2002 01 30.08895 05 13 27.56 +22 41 32.8 20.5 98WG24 304 Cf1458 2002 01 30.11159 05 13 27.50 +22 41 32.7 98WG24 304 Cf1458 2002 02 13.04581 05 12 53.77 +22 41 08.5 21.5R 98WG24 304 f1458 2002 02 13.09976 05 12 53.67 +22 41 08.5 98WG24 304 f1458 2005 11 16.98956 05 44 59.114 +23 17 39.97 22.0R 98WG24 500 2005 11 16.99628 05 44 59.080 +23 17 39.96 98WG24 500 2005 11 17.00299 05 44 59.049 +23 17 39.95 98WG24 500
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 -0.04 2 0.0002 -5.01 0.10 0.11 0.06 3 0.0026 -67.12 0.07 0.16 -0.17 4 0.0029 -75.06 0.05 0.27 -0.07 5 0.1776 -4395.45 0.04 45.48 0.08 6 0.1777 -4398.25 0.04 45.49 0.03 7 0.1804 -4444.02 -0.15 46.47 -0.06 8 1.0319 4389.29 0.00 202.80 0.13 9 1.0319 4388.89 0.13 202.94 0.27 10 1.1083 2326.32 -0.14 219.82 0.03 11 1.1083 2326.45 ( 0.51) 219.71 ( -0.09) 12 1.1085 2318.88 -0.54 219.35 -0.53 13 1.1112 2251.41 -0.19 220.74 0.10 14 1.1112 2250.99 -0.09 220.68 0.03 15 1.1114 2246.70 -0.25 221.00 0.32 16 1.1114 2246.55 0.16 220.92 0.23 17 1.1299 1789.68 0.13 226.48 0.23 18 1.1302 1784.23 0.30 226.31 -0.03 19 1.1304 1779.24 0.17 226.61 0.20 20 2.0151 10094.25 0.02 399.62 0.03 21 2.0153 10090.33 -0.09 399.34 -0.26 22 2.0231 9885.29 0.04 400.69 -0.11 23 2.0233 9878.18 -0.14 400.67 -0.16 24 2.0260 9808.45 0.05 401.22 -0.04 25 3.1996 10872.24 -0.04 648.08 -0.23 26 3.1997 10871.40 0.11 648.05 -0.28 27 3.2378 10402.94 0.10 661.75 -0.02 28 3.2380 10401.55 0.07 661.86 0.04 29 6.9967 37461.26 0.03 1417.12 0.07 30 6.9968 37460.78 -0.02 1417.13 0.07 31 6.9968 37460.34 -0.03 1417.13 0.07
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.
98WG24 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 45.914 45.928 45.899 ecceobj 0.131 0.131 0.130 incobj 2.224 2.224 2.224 qmin 38.889 38.835 38.825 qmax 52.817 52.707 52.760 amean 45.648 45.659 45.631 amin 45.276 45.278 45.253 amax 46.071 46.085 46.061 emean 0.131 0.131 0.131 emin 0.117 0.118 0.117 emax 0.146 0.145 0.146 imean 0.761 0.758 0.762 imin 0.028 0.028 0.020 imax 1.316 1.315 1.314 fracstop 1.000 1.000 1.000 cjmean 3.100 3.100 3.100 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 176.7 176.0 177.1 kozaiamp 180.0 179.9 179.9