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: 98WV24 # Created Sun Nov 22 02:37:09 2009 # Orbit generated from Bernstein formalism # Fitting 18 observations of 18 # Arc: 8.77y # First observation: 1998/11/18 # Last observation: 2007/08/27 Preliminary a, adot, b, bdot, g, gdot: 0.000012 0.027471 0.000001 -0.000559 0.026444 0.000000 # Chi-squared of fit: 35.50 DOF: 30 RMS: 0.25 # Min/Max residuals: -0.52 0.51 # Exact a, adot, b, bdot, g, gdot: 1.491100E-05 2.754528E-02 1.003826E-06 -5.601625E-04 2.684288E-02 7.668670E-04 # Covariance matrix: 2.0078E-13 -1.0690E-13 -8.9958E-16 1.5863E-15 -3.8613E-14 -3.2762E-13 -1.0690E-13 1.3289E-13 1.3506E-15 -2.2326E-15 3.0695E-14 4.6654E-13 -8.9958E-16 1.3506E-15 1.4026E-13 -2.0313E-14 -2.5054E-16 4.7945E-15 1.5863E-15 -2.2326E-15 -2.0313E-14 7.1249E-15 -1.4933E-15 -8.6289E-15 -3.8613E-14 3.0695E-14 -2.5054E-16 -1.4933E-15 3.4338E-13 2.3766E-13 -3.2762E-13 4.6654E-13 4.7945E-15 -8.6289E-15 2.3766E-13 1.7757E-12 # lat0 lon0 xBary yBary zBary JD0 -1.004733 43.532532 -0.212648 -0.017098 -0.961091 2451135.625531 # Heliocentric elements and errors Epoch: 2451130.5000 = 1998/11/13 Mean Anomaly: 51.57826 +/- 0.070 Argument of Peri: 164.60350 +/- 0.078 Long of Asc Node: 183.58773 +/- 0.005 Inclination: 1.51516 +/- 0.000 Eccentricity: 0.04374159 +/- 0.0001 Semi-Major Axis: 39.23922816 +/- 0.0035 Time of Perihelion: 2438267.4691 +/- 17.4 Perihelion: 37.52284196 +/- 0.0041 Aphelion: 40.95561436 +/- 0.0044 Period (y) 245.8040 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 27.56268129 +/- 0.0006 Ecliptic Y 26.47118478 +/- 0.0006 Ecliptic Z -0.65318647 +/- 0.0000 Ecliptic XDOT -0.00187970 +/- 0.0000 Ecliptic YDOT 0.00209912 +/- 0.0000 Ecliptic ZDOT -0.00005853 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 38.22108942 +/- 0.0006 Geocenter to KBO 37.25383257 +/- 0.0008 # Hcoef: 7.40
The following table shows the complete astrometric record for 98WV24. 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 (98WV24) followed by the observatory code and reference code for the source of the astrometry.
1998 11 18.12480 02 45 33.31 +14 56 32.1 22.6R 98WV24 695 Ca3208 1998 11 18.19378 02 45 32.96 +14 56 30.3 98WV24 695 Ca3208 1998 11 26.36618 02 44 51.70 +14 53 25.0 23.0R 98WV24 695 Ca3208 1998 11 27.35610 02 44 46.88 +14 53 03.1 98WV24 695 Ca3208 1999 01 22.26272 02 42 07.48 +14 41 48.1 22.8R 98WV24 568 Ca5544 1999 01 23.30133 02 42 07.30 +14 41 48.6 98WV24 568 Ca5544 1999 09 08.55038 02 56 57.71 +15 46 05.0 98WV24 568 Ca7322 1999 09 08.60471 02 56 57.59 +15 46 04.4 98WV24 568 Ca7322 1999 10 10.50620 02 55 09.89 +15 37 31.7 23.3R 98WV24 568 Ca7322 1999 10 10.57244 02 55 09.58 +15 37 30.4 23.4R 98WV24 568 Ca7322 2000 11 23.19461 02 57 41.53 +15 46 06.5 21.8R 98WV24 695 Cc2190 2000 11 23.39344 02 57 40.49 +15 46 02.5 98WV24 695 Cc2190 2002 12 04.20899 03 09 27.50 +16 31 19.1 22.2R 98WV24 662 C~0771 2002 12 04.31440 03 09 26.96 +16 31 17.0 98WV24 662 C~0771 2007 08 27.11490 03 47 08.94 +18 40 58.3 24.2R 98WV24 250 S~06AK 2007 08 27.12184 03 47 08.94 +18 40 58.3 98WV24 250 S~06AK 2007 08 27.12809 03 47 08.95 +18 40 58.3 98WV24 250 S~06AK 2007 08 27.13434 03 47 08.95 +18 40 58.3 98WV24 250 S~06AK
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 0.27 0.00 -0.28 2 0.0002 -5.38 0.36 -0.20 -0.52 3 0.0226 -631.47 -0.17 1.69 -0.10 4 0.0253 -704.70 -0.15 1.70 -0.38 5 0.1783 -3112.69 -0.09 53.15 0.03 6 0.1812 -3115.02 -0.07 54.41 -0.06 7 0.8061 10344.66 0.24 -49.90 -0.02 8 0.8062 10342.83 0.18 -49.98 -0.03 9 0.8936 8702.36 -0.40 -94.97 0.16 10 0.8938 8697.69 -0.45 -94.93 0.26 11 2.0152 10952.95 0.14 -229.28 0.10 12 2.0158 10937.38 0.20 -228.84 0.44 13 4.0440 21545.36 0.09 -455.70 0.51 14 4.0443 21537.23 -0.13 -455.61 0.50 15 8.7720 56035.29 -0.01 -949.73 -0.16 16 8.7721 56035.29 -0.06 -949.73 -0.15 17 8.7721 56035.44 0.05 -949.77 -0.16 18 8.7721 56035.44 0.01 -949.77 -0.15
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.
98WV24 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 39.299 39.309 39.288 ecceobj 0.043 0.043 0.043 incobj 1.514 1.514 1.514 qmin 36.643 36.672 36.636 qmax 41.495 41.488 41.483 amean 39.022 39.033 39.011 amin 38.976 38.987 38.964 amax 39.077 39.085 39.064 emean 0.044 0.044 0.044 emin 0.026 0.026 0.025 emax 0.062 0.061 0.062 imean 1.948 1.949 1.947 imin 0.697 0.695 0.695 imax 2.844 2.846 2.839 excite_mean 0.057 0.057 0.057 fracstop 1.000 1.000 1.000 cjmean 3.045 3.046 3.045 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 181.6 183.1 178.5 kozaiamp 179.9 179.9 180.0