Asteroid
Apophis
99942 Apophis (2004 MN4)
Near-Earth asteroid that will pass about 32,000 km above Earth's surface on 2029-04-13, inside the geostationary ring, visible to the naked eye; impact is ruled out for at least the next century. Two-body motion here does NOT model the large orbit change from that flyby.
Earth close approach 2029-04-13 ~21:46 UTC at ~38,000 km from Earth's centre (~32,000 km altitude). Use JPL Horizons, not two-body elements, for positions near and after that date.
- Semi-major axis
- 0.922 AU
- Eccentricity
- 0.1911
- Inclination
- 3.34°
- Orbital period
- 0.89 years
- Diameter
- 0.34 km
Orbit: JPL Small-Body Database.