Potentially Dangerous Asteroids (Images)

Post 4467


Potentially Dangerous Asteroids (Images)

World Action Plan Emerging to Combat Asteroid Threat

Credit: ESA
An artist’s illustration of a large asteroid headed for Earth.

Orbits of Potentially Hazardous Asteroids

Credit: NASA/JPL-Caltech
This diagram illustrates the differences between orbits of a typical near-Earth asteroid (blue) and a potentially hazardous asteroid, or PHA (orange).PHAs have the closest orbits to Earth’s orbit, coming within 5 million miles (about 8 million kilometers), and they are large enough to survive passage through Earth’s atmosphere and cause significant damage.

NASA NEO Asteroid Size Model

Credit: NASA/JPL-Caltech
This chart illustrates how infrared is used to more accurately determine an asteroid’s size.

New Image of Asteroid 2005 YU55

Credit: NASA/JPL-Caltech
This radar image of asteroid 2005 YU55 was obtained on Nov. 7, 2011, at 11:45 a.m. PST (2:45 p.m. EST/1945 UTC), when the space rock was at 3.6 lunar distances, which is about 860,000 miles, or 1.38 million kilometers, from Earth.

Potentially Dangerous Asteroid 1999 RQ36

Credit: NASA/JPL-Caltech
This radar image of potentially hazardous asteroid 1999 RQ36 — the target of NASA’s Osiris-Rex sample-return mission — was obtained by NASA’s Deep SpaceNetwork antenna in Goldstone, Calif. on Sept 23, 1999.

Asteroid Apophis Illustration

An artist’s illustration of asteroid Apophis near Earth. The asteroid will fly extremely close to Earth in 2029, and then again in 2036, but poses no threat of hitting the planet either time.



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