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: 99XY143 # Created Thu May 24 01:37:02 2012 # Orbit generated from Bernstein formalism # Fitting 24 observations of 26 # Arc: 8.77y # First observation: 1999/12/14 # Last observation: 2008/09/19 Preliminary a, adot, b, bdot, g, gdot: 0.000367 0.021633 -0.000040 -0.002722 0.023394 0.000000 # Chi-squared of fit: 46.29 DOF: 42 RMS: 0.25 # Min/Max residuals: -0.87 0.60 # Exact a, adot, b, bdot, g, gdot: 1.487701E-05 2.209254E-02 -1.401307E-06 -2.775776E-03 2.354250E-02 1.753142E-03 # Covariance matrix: 2.3236E-13 -1.5585E-13 -9.5488E-15 1.2542E-14 1.7613E-13 -5.3210E-13 -1.5585E-13 1.6709E-13 1.1716E-14 -1.5415E-14 -1.4885E-13 6.4779E-13 -9.5488E-15 1.1716E-14 1.0759E-13 -1.7820E-14 -5.4855E-15 5.0377E-14 1.2542E-14 -1.5415E-14 -1.7820E-14 7.7679E-15 7.0192E-15 -6.6402E-14 1.7613E-13 -1.4885E-13 -5.4855E-15 7.0192E-15 5.6783E-13 -3.4096E-13 -5.3210E-13 6.4779E-13 5.0377E-14 -6.6402E-14 -3.4096E-13 2.7628E-12 # lat0 lon0 xBary yBary zBary JD0 -0.238772 77.174380 -0.086780 -0.004285 -0.976938 2451526.807633 # Heliocentric elements and errors Epoch: 2451520.5000 = 1999/12/08 Mean Anomaly: 87.81878 +/- 0.105 Argument of Peri: 84.58723 +/- 0.084 Long of Asc Node: 255.41843 +/- 0.000 Inclination: 7.14499 +/- 0.000 Eccentricity: 0.08257375 +/- 0.0001 Semi-Major Axis: 43.29746338 +/- 0.0066 Time of Perihelion: 2426135.5104 +/- 29.9 Perihelion: 39.72222931 +/- 0.0068 Aphelion: 46.87269746 +/- 0.0077 Period (y) 284.9062 +/- 0.07 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 9.56788487 +/- 0.0003 Ecliptic Y 42.39087403 +/- 0.0013 Ecliptic Z -0.17706728 +/- 0.0000 Ecliptic XDOT -0.00246539 +/- 0.0000 Ecliptic YDOT 0.00077537 +/- 0.0000 Ecliptic ZDOT -0.00032356 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.45758822 +/- 0.0013 Geocenter to KBO 42.47637523 +/- 0.0014 # Hcoef: 6.01
The following table shows the complete astrometric record for 99XY143. 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 (99XY143) followed by the observatory code and reference code for the source of the astrometry.
1999 12 14.30689 05 04 21.32 +22 34 59.8 99XY143 696 Ca9036 1999 12 14.37844 05 04 20.96 +22 34 59.4 99XY143 696 Ca9036 1999 12 15.26753 05 04 16.35 +22 34 52.6 99XY143 696 Ca9036 1999 12 15.32744 05 04 16.05 +22 34 51.1 99XY143 696 Ca9036 1999 12 15.39549 05 04 15.68 +22 34 51.0 22.2R 99XY143 696 Ca9036 2000 01 30.13781 05 01 01.66 +22 29 21.0 99XY143 705 Cb0065 2000 01 30.16169 05 01 01.59 +22 29 20.8 99XY143 705 Cb0065 2000 01 30.19586 05 01 01.49 +22 29 20.7 99XY143 705 Cb0065 2000 11 26.33981 05 11 21.49 +22 34 38.8 22.2R 99XY143 695 Cc2321 2000 11 26.42632 05 11 21.06 +22 34 38.2 22.2R 99XY143 695 Cc2321 2000 11 27.39902 05 11 16.18 +22 34 30.9 22.1R 99XY143 695 Cc2321 2000 12 28.32366 05 08 38.587 +22 30 34.41 99XY143 568 Cl4098 2000 12 28.38944 05 08 38.261 +22 30 34.18 22.2R 99XY143 568 Cl4098 2001 01 25.17501 05 06 43.41 +22 27 36.0 22.0R 99XY143 695 Cc6606 2001 01 25.27377 05 06 43.08 +22 27 35.4 99XY143 695 Cc6606 2002 11 05.56857 05 23 54.68 +22 29 10.6 22.0R 99XY143 568 Cl8265 2002 11 05.60419 05 23 54.53 +22 29 10.5 99XY143 568 Cl8265 2002 11 06.59353 05 23 50.70 +22 29 04.9 99XY143 568 Cl8265 2002 11 30.57122 05 22 01.68 +22 26 40.5 21.9R 99XY143 568 Cg7552 2002 12 01.50466 05 21 56.98 +22 26 34.9 99XY143 568 Cg7552 2007 11 11.42843 05 50 20.48 +21 57 28.5 20.7R 99XY143 688 Cw6672 2007 11 11.50277 05 50 20.28 +21 57 26.5 99XY143 688 Cw6672 2008 09 19.13990 05 56 53.06 +21 52 29.6 23.2R 99XY143 250 S~06AL 2008 09 19.14615 05 56 53.07 +21 52 29.6 99XY143 250 S~06AL 2008 09 19.15310 05 56 53.07 +21 52 29.6 99XY143 250 S~06AL 2008 09 19.20379 05 56 53.13 +21 52 29.4 99XY143 250 S~06AL
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 -0.01 0.00 -0.10 2 0.0002 -5.00 0.22 0.08 0.10 3 0.0026 -69.21 ( -0.13) -0.58 ( 0.80) 4 0.0028 -73.49 -0.04 -1.67 -0.20 5 0.0030 -78.60 -0.19 -1.28 0.30 6 0.1282 -2786.28 0.09 -64.95 0.05 7 0.1283 -2787.27 0.05 -65.05 -0.03 8 0.1284 -2788.66 0.01 -65.01 0.06 9 0.9529 5795.52 0.04 -543.59 0.13 10 0.9531 5789.53 0.16 -543.69 0.18 11 0.9558 5721.51 0.05 -545.28 0.22 12 1.0404 3524.84 0.12 -592.43 -0.04 13 1.0406 3520.31 0.14 -592.26 0.21 14 1.1167 1918.64 -0.13 -626.27 0.25 15 1.1170 1914.03 -0.22 -626.45 0.18 16 2.8946 16210.50 0.04 -1640.96 -0.30 17 2.8947 16208.41 -0.10 -1640.93 -0.19 18 2.8974 16154.75 0.02 -1643.16 -0.34 19 2.9631 14628.87 -0.18 -1689.21 -0.57 20 2.9656 14563.16 -0.29 -1690.47 -0.24 21 7.9100 38543.47 ( -0.63) -4497.61 ( 0.91) 22 7.9102 38540.55 0.60 -4499.58 -0.87 23 8.7661 44224.08 -0.11 -4893.94 0.28 24 8.7662 44224.22 -0.06 -4893.94 0.30 25 8.7662 44224.22 -0.16 -4893.94 0.33 26 8.7663 44225.09 -0.06 -4894.16 0.30
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.
99XY143 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.302 43.321 43.282 ecceobj 0.082 0.083 0.082 incobj 7.144 7.144 7.145 qmin 39.009 39.026 38.990 qmax 47.144 47.165 47.104 amean 43.057 43.075 43.037 amin 43.029 43.048 43.012 amax 43.084 43.107 43.064 emean 0.083 0.083 0.083 emin 0.073 0.073 0.073 emax 0.094 0.094 0.094 imean 9.108 9.102 9.115 imin 8.315 8.313 8.320 imax 9.899 9.892 9.902 excite_mean 0.179 0.179 0.179 fracstop 1.000 1.000 1.000 cjmean 3.052 3.052 3.052 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 177.9 177.9 177.8 kozaiamp 180.0 180.0 180.0