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AsteriaStar
Near-Earth object class

Aten asteroids

Earth-crossing NEOs with a semi-major axis smaller than Earth's (a < 1 AU) and aphelion beyond Earth's perihelion (Q > 0.983 AU).

Near-Earth object class

Overview

Near-Earth asteroids with orbits mostly inside Earth's but reaching out to cross it, named after 2062 Aten.

Members

1 modelled member.

  • 99942 ApophisPHA

    A near-Earth asteroid famous for its very close but non-impacting approach to Earth on 13 April 2029; impacts for the foreseeable future have been ruled out by radar and tracking.

    CategoryNear-EarthTypeSilicaceous (S)Discovered2004

Knowledge connections

Sources

The primary and reference sources this topic draws on.

  • NASANational Aeronautics and Space Administration

    Mission data, planetary science, space telescopes, and public-domain imagery.

    Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.

  • NASA JPLJet Propulsion Laboratory / Solar System Dynamics

    Orbital data, ephemerides, and small-body parameters for planets, asteroids, and comets.