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Asteroid Strike in Antarctica

  1. Sep 7, 2005 #1

    LURCH

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    OK, this is reported in the Website nkown as the "Unmuseum", and they specialise in the wierd. They've got stuff on Nesse, UFO's, etc., but they seem to have some integrity. So I'm reluctant to take their word for it, especially when the story is big enough that it should have made the news. Has anyone else heard about this?
     
  2. jcsd
  3. Sep 7, 2005 #2
    is there a link?
     
  4. Sep 7, 2005 #3

    Astronuc

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    http://www.unmuseum.org/soearch/over.htm

    I would like to see another reference. They seem to be the only one reporting this, and I would imagine that it would have been big news last September.

    It should have made a significant seismic signature! And there should have been a pretty good explosion.
     
  5. Sep 7, 2005 #4
  6. Sep 7, 2005 #5
  7. Sep 7, 2005 #6

    russ_watters

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    It doesn't seem too realistic to me. First off, that's more than triple the theoretical maximum impact velocity for an object in solar orbit. Second, can we really call a 5m object an "asteroid"? Playing with the impact calculator at U of Arizona, it looks like it should have been an air burst - but still, I'd think an air burst of from 0.1 to 1.0 megatons (depending on a lot of factors) would make the news. http://www.lpl.arizona.edu/impacteffects/
     
    Last edited: Sep 7, 2005
  8. Sep 7, 2005 #7

    russ_watters

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    Ok, google is your friend. Apparently, it happened, but at least somem of the facts in that story are wrong: It didn't impact, it was an airburst. None of the sites I have found say anything about the velocity, but I doubt 150mi/sec is correct. GOOGLE
     
  9. Sep 7, 2005 #8

    tony873004

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    I agree with you. It could only be travelling that fast if it came from outside the solar system. And even then, the speed is too high unless it's from the Milky Way's halo rather than the galactic plane. Asteroids should strike the top of the atmosphere with speeds in the 10's of kilometers / s, not 100's.
     
  10. Sep 7, 2005 #9

    Art

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    Here's a useful link http://www.antarcticconnection.com/antarctic/news/2005-2/090605holeinone.shtml

    extract from article
     
  11. Sep 7, 2005 #10

    What are the possibilities that this was actually a comet with a rocky core?
     
  12. Sep 8, 2005 #11

    LURCH

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    This really perplexes me; why wasn't it all over the news? I have long thought that a large strike in a remote region was a kind-of "best case scenario". One that would direct attention (and better funding) toward the idea of detection and collision avoidence, without costing a lot of lives. This happened twelve months ago and I had to hear about it form an email!
     
  13. Sep 14, 2005 #12
    It seems, given its size, that the chances of it actually causing damage on the surface are very low. Objects this small are (nearly) always going to be destroyed in an airburst that is (typically) sufficiently high that there will be no gross effects at or near ground level. We are (probably)taking hits of this magnitude several times a century with no fatal effect because they are high altitude airbursts.
     
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