Why are orbits that closer to the Sun than 0.08 unstable?
Neil Wyn W. Evans (University of Oxford) and Serge A. Tabachnik (Princeton University Observatory) revised states that objects closer than 0.08 a.u. would be perturbed by extreme solar heating and dynamical transport mechanisms and would either push it away or pull it in to the Sun. Objected very close to the Sun would become soft or even melt. Tidal forces of the Sun would very likely destroy such objects. Very small objects would be ejected by the force of the solar radiation and wind. Larger objects that did not melt would be subjected to the Yarkovsky effect causing them to migrate.
