Definitions for "Atens"
Asteroids with orbits largely inside the orbit of the Earth; with semimajor axis 1.0 AU and aphelion distance Q 0.983 AU.
A family of near-Earth asteroids that have average orbital diameters closer than one astronomical unit (1 AU), the distance from the Earth to the Sun and aphelia of greater than Earth's perihelion, placing them usually inside the orbit of Earth.