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Closest Ever Asteroid Passage Revealed

Posted by michael on from the horseshoes-and-hand-grenades dept.

tricaric writes "Another asteroid passed, last March 31st, close to the Earth. This time it was only about 2 Earth radii from the Earth. The observation have been published only a few days ago, because 'Although the observed arc is only 44 minutes, the orbit is quite determinate and, given the exceptional nature of this close approach, the object is now receiving a designation.' Check out the ORSA animation!"

5 of 52 comments (clear)

  1. It was tiny... by Selfbain · · Score: 5, Informative

    If you read the article you can see that the asteroid was extremely small and would have broken up in the atmosphere.

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    Well, it has never been successfully tested.
  2. It was only 6m in diameter -- harmless by jerde · · Score: 3, Informative

    Wouldn't it be prudent to put in the story text that the object is estimated to be only 6 meters in diameter?

    The article states that an object that size would burn up harmlessly in the atmosphere. I'm not sure if that's correct or not... a 6 meter hunk of material would probably rain at least SOME material down on the ground, but I don't know if it would make a crater.

    The point is that we didn't just narrowly escape certain doom... it was a small rock.

    - Peter

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    INsigNIFICANT
    1. Re:It was only 6m in diameter -- harmless by richie2000 · · Score: 3, Informative
      It's roughly two really small cars or one biggun. A Volvo 240 (the new yardstick for measuring asteroids, since I happen to have one handy) is just over 5 meters long. So if it helps, think of it as a large Volvo hurtling towards us from outer space at thousands of kilometers per hour (I'll save the detailed kph comparisons for later, but a standard Volvo 240 normally tops out at between 160 and 210kph depending on the engine).

      Calculating how many Volvos there are in one Rhode Island is left as an exercise for the reader.

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      Money for nothing, pix for free
  3. This one's a whole lot closer.. by dreamer-of-rules · · Score: 5, Informative
    According to Earth Speeds, the Earth goes around the Sun at approximately 18.5 miles/sec, or 30 km/sec. In six hours the Earth will move 400,000 miles or 650,000 km around the sun. The radius of the Earth is roughly 4,000 miles or 6,500 km. So in six hours the Earth moves about 100 times its radius.

    Basically, this latest asteroid is a lot closer.

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    Everyone is entitled to his own opinions, but not his own facts.
  4. Tunguska event by FooAtWFU · · Score: 3, Informative

    Well, the Tunguska event of 1908 is a case of one of these actually hitting the planet- though I guess it doesn't qualify as a "passage".

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