TL;DR: Apophis will pass within 31,000 km of Earth on April 13, 2029 - closer than geostationary satellites. OSIRIS-APEX will study it during this unprecedented close approach, providing detailed composition
Apophis will pass within 31,000 km of Earth on April 13, 2029 - closer than geostationary satellites. OSIRIS-APEX will study it during this unprecedented close approach, providing detailed composition data for this accessible near-Earth asteroid.
Composition
Silicate with possible metal; under characterization
Orbit
0.75-1.10 AU (near-Earth), period 0.89 years; extremely close Earth approach April 2029
Mining Potential
Medium - extremely accessible during 2029 close approach; composition being characterized
Mission
OSIRIS-APEX (encounter April 2029)