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: 98HR151 # Created Wed Nov 27 02:07:53 2024 # Orbit generated from Bernstein formalism # Fitting 11 observations of 11 # Arc: 62.99d # First observation: 1998/04/28 # Last observation: 1998/06/30 Preliminary a, adot, b, bdot, g, gdot: -0.000002 0.029564 0.000000 0.003050 0.026027 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 9.46 DOF: 17 RMS: 0.16 # Min/Max residuals: -0.34 0.30 # Exact a, adot, b, bdot, g, gdot: 1.559770E-05 2.698447E-02 1.571241E-06 3.109065E-03 2.562798E-02 -1.104982E-02 # Covariance matrix: 3.0164E-13 -6.2823E-12 -4.0905E-15 3.4438E-13 6.9647E-13 6.6336E-10 -6.2823E-12 3.3795E-08 1.0810E-11 -9.2098E-10 4.2950E-09 -1.7674E-06 -4.0905E-15 1.0810E-11 2.2829E-13 -2.0766E-12 1.3313E-12 -5.8078E-10 3.4438E-13 -9.2098E-10 -2.0766E-12 6.0796E-11 -1.1348E-10 4.9456E-08 6.9647E-13 4.2950E-09 1.3313E-12 -1.1348E-10 5.6756E-10 -2.1774E-07 6.6336E-10 -1.7674E-06 -5.8078E-10 4.9456E-08 -2.1774E-07 9.4922E-05 # lat0 lon0 xBary yBary zBary JD0 -0.037481 -166.198353 -0.405663 -0.000826 -0.926937 2450931.801491 # Heliocentric elements and errors Epoch: 2450930.5000 = 1998/04/27 Mean Anomaly: 332.46391 +/- 21.327 Argument of Peri: 72.53679 +/- 12.302 Long of Asc Node: 194.70820 +/- 0.004 Inclination: 6.56251 +/- 0.079 Eccentricity: 0.47399899 +/- 0.3993 Semi-Major Axis: 58.71363436 +/- 29.6713 Time of Perihelion: 2463499.6695 +/- 1996.8 Perihelion: 30.88343089 +/- 28.1659 Aphelion: 86.54383783 +/- 49.6238 Period (y) 449.9007 +/- 341.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -38.68824941 +/- 0.0352 Ecliptic Y -9.92683497 +/- 0.0087 Ecliptic Z -0.02545382 +/- 0.0000 Ecliptic XDOT 0.00183583 +/- 0.0010 Ecliptic YDOT -0.00250924 +/- 0.0002 Ecliptic ZDOT 0.00033283 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 39.94149900 +/- 0.0342 Geocenter to KBO 39.01985779 +/- 0.0363 # Hcoef: 8.58
The following table shows the complete astrometric record for 98HR151. 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 (98HR151) followed by the observatory code and reference code for the source of the astrometry.
1998 04 28.30076 12 50 44.80 -05 28 47.2 24.3R 98HR151 568 Ca4825 1998 04 28.36758 12 50 44.49 -05 28 45.2 24.3R 98HR151 568 Ca4825 1998 04 28.44050 12 50 44.18 -05 28 42.9 24.3R 98HR151 568 Ca4825 1998 05 01.31256 12 50 32.51 -05 27 24.4 24.3R 98HR151 568 Ca4825 1998 05 01.32418 12 50 32.45 -05 27 24.0 24.3R 98HR151 568 Ca4825 1998 05 01.33580 12 50 32.40 -05 27 23.5 24.3R 98HR151 568 Ca4825 1998 05 23.30442 12 49 17.43 -05 18 49.3 24.3R 98HR151 568 Ca4825 1998 05 23.31606 12 49 17.40 -05 18 48.8 24.3R 98HR151 568 Ca4825 1998 05 23.32769 12 49 17.35 -05 18 48.7 24.3R 98HR151 568 Ca4825 1998 06 29.35264 12 48 32.56 -05 12 55.8 24.3R 98HR151 568 Ca4825 1998 06 30.29242 12 48 32.98 -05 12 56.5 24.3R 98HR151 568 Ca4825
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 0.22 0.00 0.07 2 0.0002 -5.04 -0.21 0.05 0.04 3 0.0004 -10.20 -0.34 0.37 0.26 4 0.0082 -201.26 0.30 5.09 -0.19 5 0.0083 -202.24 0.10 5.11 -0.18 6 0.0083 -203.12 -0.01 5.28 -0.03 7 0.0685 -1434.55 0.09 44.29 -0.10 8 0.0685 -1435.16 0.02 44.57 0.17 9 0.0685 -1435.89 -0.18 44.38 -0.04 10 0.1699 -2189.53 0.12 109.44 -0.07 11 0.1725 -2183.47 -0.10 111.23 0.08
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.
98HR151 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0