Asteroid of doom – or maybe not
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ntAn 460 foot wide asteroid is making the rounds over the Internet as a potential threat to Earth in 2040. Headlines like: “Asteroid Threat: Why do they hate us,” “Asteroids facing unvarying barrage of high-speed impacts,” and “Armegeddon 2040.” But NASA says hold on.
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ntAsteroid 2011 AG5 was discovered in January 2011 using a telescope at the summit of Mt. Lemon north of Tucson, Az. Currently, the asteroid cannot be tracked until 2013 due to its position in the daytime sky.
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ntThe orbit of asteroid 2011 AG5 carries it beyond the orbit of Mars to halfway between Earth and Venus. It is expected to pass no closer to Earth than 1 million miles in 2023 and 10.4 millon miles in 2028. The Earth’s orbit should change it’s orbit slightly giving it a super-slim chance of hitting the Earth on Feb. 5, 2040.
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ntIn this gallery, we’ll look at the chances of Asteroid 2011 hitting Earth and how space agencies are tracking it.
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ntImage credit: NASA/JPL/Caltech/NEOPO
ntPhotoshop-created images like this one have spread across the Internet. NASA says the asteroid has a 1 in 650 chance to hit the Earth. Sounds possible but when you figure that’s a 0.15 percentage chance.
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ntIf it does have a chance to strike Earth, potential solutions such as nuclear bombs or attaching a weight to one side of it to adjust its orbit have been proposed. Maybe we should watch Armageddon again.
ntHere’s what an asteroid collision with Earth might look like from space.
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ntA massive impact could cause large tsunamis or what is called an impact winter where a large amount of dust collects in the stratosphere and blocks sunlight. An impact winter may have caused the extinction of dinosaurs.
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ntAn asteroid this large would create a crater of a little more than 1/2 mile wide according to an Impact Earth chart developed at Purdue University.
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ntCredit: NASA
ntAsteroid 2011 AG5 is currently rated No. 1 on the Torino Impact Hazard Scale which assesses the chances of an asteroid hitting Earth.
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ntCredit: NASA
ntThis chart shows the number of asteroids that have been discovered and are being tracked as of Feb. 2012.
ntA chart from NASA’s Near Earth Observation Program puts 2011 AG5 on the list of objects that have not been observed recently.
ntHere’s a chart of the asteroids that will be passing closest to Earth from the Near Earth Observation Program.
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ntCredit: NASA
ntAn asteroid 460-feet wide could create some major damage if hit a populated area. Here’s a photo of Meteor Crater in Arizona. It was formed by an asteroid about 80-miles wide between 20,000 and 50,000 years ago. It’s about 1.2 km deep (about 3/4 of a mile).
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ntCredit: Smithsonian
