The Behavior of Orbital Element of 1566 Icarus Asteroids

1566 Icarus is an asteroid with special orbital elements; high eccentricity (e = 0.8269), high incli-nation (i = 22o .8368), small semimajor-axis (a = 1.0778 AU), argument of perihelion (31o .3393), longitude of ascending node (88o .0474), and mean anomaly (M = 85o .8306) at epoch 2455200.5 JD or January 4, 2010. In this paper, we would like to trace the orbital evolution of 1566 Icarus for 200,000 years, from 100,000 BC until 100,000 AD. The gravitational influence of the eight planets was included in the integrations, which were all carried out using the hybrid inte-grator within the Mercury 6 (Chambers, 1999) software package. From this, we try to predict the behavior of its orbital element by making 243 (35 ) clones of 1566 Icarus. The clones are made by repeated permutation of nominal, nominal+1σ, nominal-1σ with the orbital elements: semi-major axis, eccentricity, orbital inclination, longitude of ascending node, and argument of perihelion. From this cloning, we see that the orbital evolution of 1566 Icarus will be stable for 200,000 years, but with small variation in semi-major axis (a).