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Three-Meter Asteroid Hits Earth’s Atmosphere… Somewhere

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Posted January 3, 2014

This was very likely the last trip around the Sun for the Earth-crossing asteroid 2014 AA, according to calculations by several teams of astronomers and published online earlier today on the IAU’s Minor Planet CenterDiscovered just yesterday by the Catalina Sky Survey, the estimated 3-meter-wide Apollo asteroid was supposed to clear Earth today by a razor-thin margin of about 611 km (380 miles)… but it’s now looking like it didn’t quite make it.

Projected path of 2014 AA south of the Cape Verde islands. (Credit: Asteroid Initiatives, LLC)

Probability pattern of 2014 AA south and west of the Cape Verde islands. (Credit: Asteroid Initiatives, LLC)

The diagram above, via Asteroid Initiatives’ Twitter feed, shows a projected path probability pattern for 2014 AA’s re-entry locations. No eyewitness accounts have yet been reported, and if anyone knows of any surveillance cameras aimed in those directions that might have captured footage of a bolide feel free to share that info below in the comments and/or with @AsteroidEnergy on Twitter.

Other calculations put the entry point anywhere between western Africa and Central America.

According to the MPEC report the asteroid “was unlikely to have survived atmospheric entry intact.”

Watch an animation below showing 2014 AA’s point-of-view as it met Earth. (Video courtesy of Pasquale Tricarico, senior scientist at the Planetary Science Institute in Tucson, AZ.)

2014 AA's approach to Earth on Jan. 1-2, 2014 (Pasquale Tricarico/PSI)

Simulation of 2014 AA’s approach to Earth on Jan. 1-2, 2014 (Credit: Pasquale Tricarico/PSI)

JPL’s Near-Earth Object program classifies Apollo asteroids as “Earth-crossing NEAs with semi-major axes larger than Earth’s (named after asteroid 1862 Apollo).” And while not an Earth-shattering event (fortunately!) this is just another small reminder of why we need to keep watch on the sometimes-occupied path our planet takes around the Sun!

Read the NASA/JPL news release on 2014 AA here.

Source: Universe Today, story by Jason Major

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