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What To Do About an Asteroid That Has a 1 In 625 Chance of Hitting Us In 2040?

The Bad Astronomer writes "The asteroid 2011 AG5 is 140 meters across: football-stadium-sized. Its orbit isn't nailed down well enough to say yet, but using what's currently known, there's a 1 in 625 chance it will impact the Earth in 2040. It's behind the Sun until September 2013, and more observations taken then will probably reduce the odds of impact to something close to 0. But does it make sense to wait until then to start investigating a mission to deflect it away our planet? Astronomers are debating this right now, and what they conclude may pave the way for how we deal with an asteroid threat in the future."

32 of 412 comments (clear)

  1. I will be doing one thing about it. by Anonymous Coward · · Score: 5, Funny

    Praying it hits. That would be so awesome!

    1. Re:I will be doing one thing about it. by Lotana · · Score: 5, Informative

      140 meters diameter doesn't sound like much. Depends on the composition and speed, it will be reduced even further before making it to the ground. I immagine it shouldn't be much worse than a Tunguska event and seeing how majority of the planet is uninhabited, chances are good that no major number of lifes will be lost.

      And if it occurs at a location where we can monitor/record, it will bring awareness that rocks in space do indeed end up on our planet in our lifetimes, thus worthwile to think about. Therefore having this pebble hit us might not be such a bad thing after all.

    2. Re:I will be doing one thing about it. by Spiridios · · Score: 5, Informative

      140 meters diameter doesn't sound like much. Depends on the composition and speed, it will be reduced even further before making it to the ground. I immagine it shouldn't be much worse than a Tunguska event and seeing how majority of the planet is uninhabited, chances are good that no major number of lifes will be lost.

      And if it occurs at a location where we can monitor/record, it will bring awareness that rocks in space do indeed end up on our planet in our lifetimes, thus worthwile to think about. Therefore having this pebble hit us might not be such a bad thing after all.

      Just some numbers for reference:

      This one is 140 meters across.

    3. Re:I will be doing one thing about it. by gmhowell · · Score: 4, Funny

      Amen brother. Let's get on the A ship and use the Earth as the B.

      I'll be laughing when you die from dirty telephone handsets.

      --
      Jesus was all right but his disciples were thick and ordinary. -John Lennon
    4. Re:I will be doing one thing about it. by EdIII · · Score: 4, Funny

      It's not the size of the asteroid, but its motion to the ocean.

    5. Re:I will be doing one thing about it. by Lotana · · Score: 5, Informative

      True, but the remaining variables are the composition and how much actually makes it down to the surface.

      Lets use some numbers in the calculator from the quick Google search:

      http://impact.ese.ic.ac.uk/ImpactEffects/

      - We are hit with 140 meters perfect sphere of dense stone
      - Speed of projectile is 17 km/s (Calculator states that it is the typical speed for asteroid impace)
      - Entry angle of 45% (Again based on the caluculator stated most likely)
      - Rock lands into 1000 meter depth water. Random figure

      Results:
      1 km away

      20 km away

      100 km away

      Reading the descriptions, it honestly doesn't sound like such a calamity. At 100 km distance it is hardly felt.

    6. Re:I will be doing one thing about it. by wisty · · Score: 5, Informative

      Um. Not really. http://idisk.mac.com/mpaineau-Public/paine_tsunami_asteroid99.pdf

      The assumption people make is that all the kinetic energy goes into a wave. That's not a given. It can dissipate as heat as the meteor falls through the water, or create incoherent waves. The Indian Ocean tsunami was so bad because the plate "flicked" up, splashing the water. It might be more like punching the water, which would still make a bit of a splash; but it might not make a huge wave.

      That said, I wouldn't be swimming anywhere near it.

    7. Re:I will be doing one thing about it. by edxwelch · · Score: 5, Informative

      Huh? It says 72 Megaton explosion. That's bigger than than the largest nuclear bomb ever detonated.

    8. Re:I will be doing one thing about it. by janeil · · Score: 4, Interesting

      If I live that long I'll be 85, and would LOVE to have this be my end-o-life event! Bring it on, random cosmic occurence!

  2. Just... by MisterMidi · · Score: 4, Funny

    Just threaten to sue it out of existance.

    1. Re:Just... by Nikker · · Score: 5, Insightful

      Maybe if we launch all the lawyers and rights holders at it they will just take it apart themselves? Just tell them there is a bunch of DVD's in the middle!

      --
      A loop, by its nature, continues. If that didn't make sense, start reading this sentence again.
  3. 2040, you say? by TheRaven64 · · Score: 4, Funny

    There is a 1 in 625 chance that I will be taking a long holiday and be unavailable for comment in 2040...

    --
    I am TheRaven on Soylent News
  4. I don't see the problem. by jd · · Score: 4, Insightful

    If it hits, it wipes out the major cause of habitat destruction, global warming and talk radio. If it misses, the sales of tinfoil hats and doomsday billboards will restore the global economy.

    --
    It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
    1. Re:I don't see the problem. by CrimsonAvenger · · Score: 5, Interesting

      It's too small to be a civilization-killer. We're only talking a gigaton-range boom when it impacts.

      Yeah, it would suck to be under it, or even within a couple hundred miles of it, but beyond that, it's mostly just a lightshow and something to keep the bookies busy.

      --

      "I do not agree with what you say, but I will defend to the death your right to say it"
    2. Re:I don't see the problem. by JWSmythe · · Score: 4, Interesting

          That would depend on what it's made of. If it's a dirty snowball (mostly ice, with some small rock debris), it'd fall apart when it hit the atmosphere, and make for a pretty light show.

          We've identified what we believe to be other rarer objects. Say it was a chunk of something like BPM 37093. I suspect that would be dangerous on reentry. I'm not a geologist, so I won't attempt to guess what would happen to it. Would it shatter, melt, or remain one relatively solid mass the whole way down.

          If so, I don't think it would be an ELE. Tragic? Possibly, depending on where it hit. Catastrophic? probably not. Despite the way things look in population centers, there are vast areas of relatively uninhabited land around the world. If it hit the water, it may cause a tsunami wave. Depending on where that wave makes landfall, it could disrupt anywhere from dozens to millions of people.

      --
      Serious? Seriousness is well above my pay grade.
    3. Re:I don't see the problem. by KhabaLox · · Score: 4, Informative

      If it hit the water, it may cause a tsunami wave. Depending on where that wave makes landfall, it could disrupt anywhere from dozens to millions of people.

      But weren't the tsunami's (2004 and Japan's) caused when large (kilometers long) sections of the seabed were suddenly raised up, displacing the seawater? The displacement of a 140 m meteor doesn't seem like it would be as much.

      Further reading:

      The energy released on the Earth's surface only (ME, which is the seismic potential for damage) by the 2004 Indian Ocean earthquake and tsunami was estimated at 1.1×1017 joules,[24] or 26 megatons of TNT. This energy is equivalent to over 1500 times that of the Hiroshima atomic bomb, but less than that of Tsar Bomba, the largest nuclear weapon ever detonated. However, this is but a tiny fraction of the total work done MW (and thus energy) by this quake, 4.0×1022 joules (4.0×1029 ergs),[25] the vast majority underground.

      While the wikipedia page doesn't say how much water was displaced, it does say this:

      the earthquake had made a huge impact on the topography of the seabed. 1,500-metre-high (5,000 ft) thrust ridges created by previous geologic activity along the fault had collapsed, generating landslides several kilometers wide. One such landslide consisted of a single block of rock some 100 m high and 2 km long (300 ft by 1.25 mi). The momentum of the water displaced by tectonic uplift had also dragged massive slabs of rock, each weighing millions of tons, as far as 10 km (6 mi) across the seabed.

      --
      Ceci n'est pas un sig.
  5. There is one thing we can do... by OliWarner · · Score: 4, Funny

    We should definitely consider putting Bruce Willis, Ben Affleck and Aerosmith into cryo right now. Without them, we won't have a chance.

  6. Well obviously... by tylersoze · · Score: 5, Funny

    Decisions of how to deal with the massive asteroid are best left to the individual.

    http://www.theonion.com/articles/republicans-vote-to-repeal-obamabacked-bill-that-w,19025/

  7. 18 months won't matter by Anonymous Coward · · Score: 5, Insightful

    Yes it makes sense to wait. Why waste 18 months coming up with solutions to deflect it only to find out it won't strike 27 years from now? If September 2013 rolls around and it looks like it will hit in 2040, 27 years is practically as much time as 28 years to develop a solution.

  8. Slow it down or speed it up just slightly by gblackwo · · Score: 5, Interesting

    I always liked the plans that involved speeding the asteroid up, or slowing it down just slightly.

    I saw a recent idea that involved painting it white in order to decrease absorptivity.

    1. Re:Slow it down or speed it up just slightly by Jeremi · · Score: 5, Funny

      I saw a recent idea that involved painting it white in order to decrease absorptivity.

      The real trick is to make it look like you're having so much fun repainting it that all the other countries demand to be allowed to repaint it as well.

      --


      I don't care if it's 90,000 hectares. That lake was not my doing.
  9. Easy answer by Nidi62 · · Score: 4, Insightful

    Plan a party. Get wasted, and get laid.

    --
    The only thing necessary for evil to triumph is for it to be pitted against a slightly greater evil
    1. Re:Easy answer by Austerity+Empowers · · Score: 5, Funny

      get laid

      This is about an asteroid that has a 1 in 625 change of hitting earth, not about hell freezing over.

  10. Re:Set a reminder for 20 years from now by kat_skan · · Score: 5, Funny

    In 2040 Bruce Willis will be 85. What's he gonna do? Tell the asteroid to get off his lawn?

  11. Let's settle the argument... by Anonymous Coward · · Score: 5, Funny

    Wherever it hits, those are the people that God hates most. End of debate.

  12. Re:Ignore it by Capsaicin · · Score: 4, Funny

    Ignore it.

    Look I agree, only 1 in 625?! That hardly seems like a threat at all. Anyway, gotta run, I'm off to by a lottery ticket.

    --
    Better to be despised for too anxious apprehensions, than ruined by too confident a security. --Edmund Burke
  13. Attach a solar sail by scorp1us · · Score: 4, Interesting

    And let the solar wind push it out. You only need to alter its orbit by 5 minutes in the next 22 years to miss completely.

    --
    Slashdot's rate-of-post filter: Preventing you from posting too many great ideas at once.
    1. Re:Attach a solar sail by Shandon · · Score: 4, Insightful

      Unless the math is wrong, or a solar storm changes the track or ... and you alter the path to make it hit dead center instead of a grazing shot. That's the problem with orbital mechanics - stuff changes over the years and depending on other gravitational interactions, what you thought was a deflection was a centering action. W00t.

      But you *know* there's a rock out there with Humanity's name on it. This one. Another one. Doesn't really matter. If we can't get off this planet in serious numbers before it hits, the universe goes on without us.

  14. Re:Astrometrics ain't like quantum mechanics boy.. by John+Hasler · · Score: 4, Insightful

    Am I the only one that gets terribly frustrated by statements like "the asteroid has a 1 in X chance to hit earth"?

    Do statements like "The coin has a 1 in 2 chance of coming up heads" also bother you?

    --
    Warning: this article may contain humor, sarcasm, parody, and perhaps even irony. Read at your own risk.
  15. Re:Idiots! by sconeu · · Score: 4, Interesting

    The Mayan calendar was more accurate... 365.2420 days, vs. Gregorians 365.2425, when the actual value was 365.2422.

    --
    General Relativity: Space-time tells matter where to go; Matter tells space-time what shape to be.
  16. Wait by DarkOx · · Score: 4, Insightful

    But does it make sense to wait until then to start investigating a mission to deflect it away our planet?

    Well lets see, a potential catastrophe is 28 years away and there is 1/625 odds based on the data we do have that it will happen. We will know evidently with much better certainty what that odds are when its a mere 26-27 years away. Given we are talking about altering the path of a massive object in space, I say wait.

    If we can't solve the problem in 26 years we mostly likely could not solve it in 28. The odds are already quite low, the cost to do anything about it quite high. If the numbers change after we can see and measure it better thats different. If we had to wait until it was much closer to get the better data that would be different. I don't see any advantage in getting a 12-24 month jump on this, given the time scales, and the complexity of solutions to the problem and risk.

    --
    Repeal the 17th Amendment TODAY! Also Please Read http://www.gnu.org/philosophy/right-to-read.html
  17. Re:Astrometrics ain't like quantum mechanics boy.. by ThosLives · · Score: 4, Insightful

    You can always turn a deterministic problem into a probabilistic one if enough variables are hidden. But this doesn't mean that the underlying mechanics of the situation are necessarily probabilistic.

    The gasoline example you gave above is inherently probabilistic, because you do expect that, given the same perceived initial conditions many times, the outcomes would vary each time the "experiment" is carried out.

    When it comes to orbital mechanics, the variability comes not in being inherently unsure of what will change, but from a known error based on number and quality of measurements. This is why the probability of collision numbers change over time - they are really confidence numbers, not probability of occurrence numbers. No matter how many times you measure a fair die roll, the probabilities will always come up the same.

    More measurements won't help you with a coin toss, quantum mechanics, or your gasoline example, because it's not possible to gain enough measurements (or in QM's case, there is strong evidence that no such parameters even exist to measure in the first place).

    --
    "There are a dozen opinions on a matter until you know the truth. Then there is only one." - CS Lewis (paraprhase)