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2004 MN4 Asteroid Odds Inching Up Again

bfwebster writes "The latest update from NASA now gives 2004 MN4 a 1-in-37 chance (probability of 2.7%) of hitting Earth on April 13, 2029. That's a bump up from the 1-in-46 (2.2%) odds given this weekend and almost a 10x increase in probability from the original 1-in-300 odds announced late last week. Interesting times, indeed."

124 of 697 comments (clear)

  1. Space Soap Opera by daniil · · Score: 5, Funny

    Ladies and gentlemen, may i present the new Slashdot soap opera: Asteroid 2004 MN4!!! That's right -- we have ourselves a new SCO! Watch out, for soon, it'll be demanding $699 license fees from all of you!

    --
    Man is a slave because freedom is difficult, whereas slavery is easy.
    1. Re:Space Soap Opera by tambo · · Score: 3, Funny
      Ladies and gentlemen, may i present the new Slashdot soap opera: Asteroid 2004 MN4!!!

      ...with the requisite theme song of course:

      That's great, it starts with an earthquake, birds and snakes, an aeroplane - Lenny Bruce is not afraid. Eye of a hurricane, listen to yourself churn - world serves its own needs, don't misserve your own needs. Feed it up a knock, speed, grunt no, strength no. Ladder structure clatter with fear of height, down height. Wire in a fire, represent the seven games in a government for hire and a combat site. Left her, wasn't coming in a hurry with the furies breathing down your neck. Team by team reporters baffled, trump, tethered crop. Look at that low plane! Fine then. Uh oh, overflow, population, common group, but it'll do. Save yourself, serve yourself. World serves its own needs, listen to your heart bleed. Tell me with the rapture and the reverent in the right - right. You vitriolic, patriotic, slam, fight, bright light, feeling pretty psyched.

      It's the end of the world as we know it.
      It's the end of the world as we know it.
      It's the end of the world as we know it and I feel fine.

      Six o'clock - TV hour. Don't get caught in foreign tower. Slash and burn, return, listen to yourself churn. Lock him in uniform and book burning, blood letting. Every motive escalate. Automotive incinerate. Light a candle, light a motive. Step down, step down. Watch a heel crush, crush. Uh oh, this means no fear - cavalier. Renegade and steer clear! A tournament, a tournament, a tournament of lies. Offer me solutions, offer me alternatives and I decline.

      It's the end of the world as we know it.
      It's the end of the world as we know it.
      It's the end of the world as we know it and I feel fine.

      The other night I tripped a nice continental drift divide. Mount St. Edelite. Leonard Bernstein. Leonid Breshnev, Lenny Bruce and Lester Bangs. Birthday party, cheesecake, jelly bean, boom! You symbiotic, patriotic, slam, but neck, right? Right.

      It's the end of the world as we know it.
      It's the end of the world as we know it.
      It's the end of the world as we know it and I feel fine...fine...

      (It's time I had some time alone)

      --
      Computer over. Virus = very yes.
    2. Re:Space Soap Opera by daniil · · Score: 2, Funny
      If these ain't signs of the apocalypse coming, then heck if I could tell ya what are.

      I can't remember the rest (it's been a while since i last read The Lesser Known Signs of the Apocalypse), but i think number three was A Rain of Poorly Designed Kittens.

      --
      Man is a slave because freedom is difficult, whereas slavery is easy.
    3. Re:Space Soap Opera by Anonymous Coward · · Score: 3, Funny

      The asteroid needs it own icon. Now.

    4. Re:Space Soap Opera by slam+smith · · Score: 2, Funny

      Nah, after this baby slams into the earth, the only currency that will be worth anything at all are cans of baked beans.

    5. Re:Space Soap Opera by pclminion · · Score: 4, Insightful
      This is funny, but it also raises an important point that many people seem to miss.

      Last time I took part in a discussion about asteroid impacts, it was suggested that people who are rich enough would be able to simply buy their way off the planet before the disaster strikes. As in buy with money.

      Think about it. There's a gigantic rock hurtling toward Earth. There are only enough spaceships (let's say) to take 1,000 people off the surface. All life as we know it on Earth is about to be destroyed. Do you: A) Get on your spaceship and get the hell out of there, or B) Accept pieces of paper with dead presidents printed on them in return for allowing other people to get off the planet?

      Even if you survived the ensuing destruction, what good would those little pieces of paper be?

      The rich sometimes seem to think they can buy their way out of any problem, but the total destruction of Earth isn't something that money will save you from.

    6. Re:Space Soap Opera by Daniel+Dvorkin · · Score: 2, Interesting

      Well, since those pieces of paper with dead presidents printed on them are no longer backed by anything in particular, the only way they're worth anything now is by consensus. How much good they'd be after the big rock hits would depend on whether or not the survivors decided to agree that they're still worth something. And the habit of agreeing that they're worth something is pretty well ingrained.

      Almost certainly, it would depend on whether the governments that printed the little pieces of paper survived the disaster. Which they probably would, for the simple reason that governments are very, very good at ensuring their own survival.

      --
      The correlation between ignorance of statistics and using "correlation is not causation" as an argument is close to 1.
    7. Re:Space Soap Opera by nizo · · Score: 2, Funny

      What is the international symbol for "Start looting now"?

    8. Re:Space Soap Opera by pclminion · · Score: 2, Interesting

      Except that if Earth's surface was completely destroyed, there would be nothing for us to purchase with our precious money, whether we believe it to have value or not.

    9. Re:Space Soap Opera by Daniel+Dvorkin · · Score: 2, Interesting

      Well, yeah, if you're talking about a planet-killer, that's different -- I suspect that in the months before impact, we'd see a period of hyperinflation followed by economic and political breakdown, leading eventually to anarchy. (Me, I'm for hiding away with a few good friends and a bunch of booze.) Whether the rich people could get off the planet -- assuming, of course, that the technological capacity existed; it certainly doesn't now -- would probably depend on how many guns they had stockpiled. But I was thinking more something like a Chicxulub, which would certainly kill a hell of a lot of people, but probably wouldn't mean the end of the human race, and maybe not even civilization, after a fashion.

      --
      The correlation between ignorance of statistics and using "correlation is not causation" as an argument is close to 1.
    10. Re:Space Soap Opera by Metasquares · · Score: 2, Informative

      This particular asteroid is not big enough to cause problems on a global scale. On the other hand, it could probably destroy a large city or create a tsunami, so it isn't something to shrug off either.

  2. The odds are now at 100% by waynegoode · · Score: 5, Funny
    The odds of it hitting Earth are now at 100%.

    Or, if you prefer, they are now at 1 in 1,000,000.

    This edition of Fun With URLs has been brought to you courtesy of an overly trusting NASA webmaster.

    1. Re:The odds are now at 100% by glomph · · Score: 4, Funny

      Yeah, Ron the Webmaster is overly trusting, he has his email address directly linked on that 'probability' page. Guess he was trying for maximum impact....

  3. Doomed...? by Boronx · · Score: 5, Funny

    Will Bruce Willis even by alive by then?

    1. Re:Doomed...? by KUHurdler · · Score: 5, Funny

      No, the climax of the whole movie is that he was already dead. That's why only the kid could see him.

      --
      Fix Your Own TV - RiddledTV.com Avoid the Landfill
  4. 2004 MN4 Asteroid Odds Keep Inch Up Again by teshuvah · · Score: 3, Funny

    I are not under stand what you is try ing to said hear.

  5. Impact energy by b1t+r0t · · Score: 3, Insightful

    One and a half gigatons. Nice. Even if it landed in an ocean, it would still make quite a splash.

    --

    --
    "Open source is good." - Steve Jobs
    "Open source is evil." - Microsoft
    1. Re:Impact energy by HeghmoH · · Score: 3, Interesting

      Ocean would probably be worse. If it landed in the ocean, it would probably be like yesterday's unpleasantness with a great many people killed by tsunami. Landing on land, it would just make a big boom and put a lot of dirt into the air, unless it happened to land in a populated area. Worst case is a city, of course, but that's not likely.

      --
      Mod down posts with a "Free Mac Mini/iPod" sig, they're spam!
    2. Re:Impact energy by Billly+Gates · · Score: 5, Insightful

      Try a tsunami about 500x times bigger almost a mile high traveling 20 miles inland destroying everything in its site.

      Keep in mind 90% of the population lives within 100 miles of the coast.

      Devestating indeed.

    3. Re:Impact energy by HeghmoH · · Score: 2, Informative

      Are you sure? If the original poster is correct and the impact energy is half a gigaton, then it will be comparable to the energy released in the earthquake, which was about 1.8 gigatons, also according to slashdot. Of course, slashdot is not exactly a reliable source for these kinds of things.

      --
      Mod down posts with a "Free Mac Mini/iPod" sig, they're spam!
    4. Re:Impact energy by Broiler · · Score: 3, Funny

      I knew it! That is why I sit in my shack in Wyoming writing manifestos!

      --
      My sigs offend the max # of people all over the world, regardless of race, religion, color, sex or creed. It's a gift.
    5. Re:Impact energy by John+Hasler · · Score: 2, Insightful

      > Landing on land, it would just make a big boom
      > and put a lot of dirt into the air, unless it
      > happened to land in a populated area.

      In which case it would put a lot of dirt and buildings in the air. We will know _exactly_ where it is going to hit years in advance: plenty of time to evacuate.

      The worst case is also the most likely: in the Pacific. Even with years of warning evacuating as many a several hundred million people would be challenging and severely disruptive.

      --
      Warning: this article may contain humor, sarcasm, parody, and perhaps even irony. Read at your own risk.
    6. Re:Impact energy by MinutiaeMan · · Score: 4, Interesting

      Even if the energy released in 2004-MN4's impact were roughly equal to the energy released in the recent earthquake, I seriously doubt that the effects could be considered comparable. For one thing, ALL of the asteroid's energy will be released in one gigantic explosion when it enters the atmosphere and hits the surface (either land or sea), concentrated in a relatively small area. But the earthquake's energy was released along a huge (700 miles long) segment of the undersea fault, which almost certainly dampened the effects of the quake. Not to mention that quakes typically take place at least several kilometers underground...

      (IANAGOP -- I Am Not A Geologist Or Physicist. But I am using what I think to be logical deductions based on what little I know.)

    7. Re:Impact energy by platypus · · Score: 3, Interesting

      I don't think it's so easy. While you are right that in deep water, the energy of the earthquake was distributed across a very long wave with a very low amplitude (i.e. big wavelength, sic), the shallower shore acted as a kind of "lense", concentrating the energy to a smaller area (shorter wavelength, higher amplitude).
      I assume an asteroid might cause waves with shorter wavelengths even in deep water, but OTOH there'd be not such a "lense effect".
      In the end, the product of amplitude, wavelength and the square of the speed of the wavefront determines the energy, so waves being taller in deep water does not mean they'll be more destructive when hitting the shore - i.e. the earthquake causes the whole of the sea to "move", while an asteroid might mainly impact the surface.
      Since at around 800 km/h, wind resistance is a real factor, higher waves might even be considerably dampened on their way through the sea.

  6. April 13, 2029 by akirchhoff · · Score: 3, Interesting

    Would this be Friday the 13th?

    1. Re:April 13, 2029 by glitch! · · Score: 5, Funny

      Would this be Friday the 13th?

      That's right, Hot Fudge Sundae arrives on a Friday...

      --
      A dingo ate my sig...
    2. Re:April 13, 2029 by JohnGrahamCumming · · Score: 5, Informative

      Yes, April 13, 2029 is a Friday.

      John.

    3. Re:April 13, 2029 by HermDog · · Score: 2, Funny

      That would be "Fridae," of course.

      --
      JADBP
    4. Re:April 13, 2029 by Anonymous Coward · · Score: 2, Funny

      How about 'calendar -t 13.04.2029'

      Apr 13 Thomas Jefferson born, 1743
      Apr 13 Laotian New Year (3 days) in Laos
      Apr 13 National Day in Chad
      Apr 13 Songkron Day in Thailand
      Apr 13 Aujourd'hui, c'est la St(e) Ida.
      Apr 13 N'oubliez pas les Herménégilde !
      Apr 13 Earth destroyed

    5. Re:April 13, 2029 by FreeUser · · Score: 2, Funny

      Well, assuming you're running a modern operating system (Linux, OS X, FreeBSD) ...


      $ cal 2029
      [...]
      April
      Su Mo Tu We Th Fr Sa
      1 2 3 4 5 6 7
      8 9 10 11 12 13 14
      15 16 17 18 19 20 21
      22 23 24 25 26 27 28
      29 30
      [...]


      So yeah, we're all going to die on Friday the 13th (of April), 2029 ... if this thing hits (and we don't do anything about it in the next 25 years).

      All praise superstition ...

      --
      The Future of Human Evolution: Autonomy
    6. Re:April 13, 2029 by bluenirve · · Score: 2, Funny

      Wait, I found a slashdot fake! The guy's running in root, so he can't be a real geek.

    7. Re:April 13, 2029 by pizzaman100 · · Score: 2, Informative

      Actually Good Friday falls on March 30 in 2029. Unless you happen to be on the Orthodox calander, in which case it falls on April 6.

    8. Re:April 13, 2029 by ender- · · Score: 2, Interesting

      It will also be my 55th birthday. Happy birthday to me....

      And for what it's worth, 2029 = 2+0+2+9 = 13 as well.

      Let the coincidence number geek field day begin.

      ender-

    9. Re:April 13, 2029 by Junior+J.+Junior+III · · Score: 2, Funny

      Nah, he's a real geek. He's running in root on someone else's box.

      --
      You see? You see? Your stupid minds! Stupid! Stupid!
  7. By how things are going... by DarkHelmet · · Score: 5, Funny
    That gives slashdotters...

    24 more years to try and get laid.

    --
    /^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i
    1. Re:By how things are going... by isa-kuruption · · Score: 5, Funny

      Stop flaming and/or giving us false hope!

  8. Anarchy! by Lussarn · · Score: 5, Funny

    When can we start the looting?

  9. Friday the 13th, part xxxxx by 14erCleaner · · Score: 2, Interesting
    Being a Unix geek, my first response to this article was to do a "cal 2029".

    Sure enough, April 13, 2029 is a Friday.

    Maybe that old superstition was a premonition instead...

    --
    Have you read my blog lately?
    1. Re:Friday the 13th, part xxxxx by 14erCleaner · · Score: 5, Funny

      On the bright side, this does solve the 2038 rollover of the 32-bit time_t.

      --
      Have you read my blog lately?
    2. Re:Friday the 13th, part xxxxx by ViolentGreen · · Score: 4, Funny

      Plus, if you addd the digits in 13, you get 4 (April being the fourth month of the year.) On top of that if, you subtract 4 (month) and 13 (day) from 2029 and add those digits, you get 5 which is amazingly the same number that you get when you sum the digits in 202 and subtract that from 9.

      Point being, well actually I have no point.

      --
      Not everything is analogous to cars. Car analogies rarely work.
  10. Assuming everyone dies... by KaiBeezy · · Score: 4, Funny


    this is more likely to kill you than ANY OTHER death due to injury in your lifetime!

    Odds of Death Due to Injury, National Safety Council

  11. Tinfoil hat by KingDaveRa · · Score: 2, Funny

    A tinfoil hat isn't gunna stand a chance against this thing.

    1. Re:Tinfoil hat by Rick.C · · Score: 2, Funny
      A tinfoil hat isn't gunna stand a chance against this thing.

      True. For this you need copper foil.

      --
      You were 80% angel, 10% demon. The rest was hard to explain. - Over The Rhine
      "Math in a song is good."-Linford
  12. When to Worry by mikejz84 · · Score: 4, Funny

    I would start to worried if astronomers suddenly started to buy a lot of Boeing and Lockheed stock.

  13. How long till we know? by John+Harrison · · Score: 5, Interesting

    How long does it have to be observed before we know whether it will hit or not? Will a year of observation give us certainty? The Torino scale is a bit strange, given the way that it combines chance of impact, time until impact, and severity of impact. I would think that a three dimensional scale would be more useful.

    1. Re:How long till we know? by mikejz84 · · Score: 4, Informative

      Space.com says it will take a few months, unless they use Arecibo's radar--which would really help norrow the orbit.

    2. Re:How long till we know? by Waffle+Iron · · Score: 2, Insightful
      Radar loses out on the resolution to optical before you even get to the moon's orbit.

      However, active radar might give you the exact distance to the object. This could supplement the optical data, which just gives you the direction to the rock at each point in time.

    3. Re:How long till we know? by Idarubicin · · Score: 3, Interesting
      More data points are great, but we need higher resolution data than radar can provide at that range.

      The key here is that they're not necessarily looking for angular position--which, you're right, they can get much more accurately using a respectable backyard optical telescope. What Aricebo gives is better information on range and radial velocity (from the time for a radar pulse to return, and its Doppler shift, respectively). This information combined with the optical measurements we already have will give us a much better measure of its course than either technique alone.

      --
      ~Idarubicin
  14. Friday the 13th by waynegoode · · Score: 2, Funny
    According to my Windows OS calendar, it is Friday. What are the odds of that?

    (Uh, 1 in 7, better than the odds of it hitting Earth.)

    1. Re:Friday the 13th by Billy+the+Mountain · · Score: 2, Informative

      The odds that any asteroid would hit on a Friday the 13 are (roughly) one in 7 * 31 = 217

      BTM

      --
      That was the turning point of my life--I went from negative zero to positive zero.
    2. Re:Friday the 13th by JWSmythe · · Score: 2, Informative

      At least some of us aren't on Windows. :)

      user @ amd64 (/user) cal 4 2029
      April 2029
      Su Mo Tu We Th Fr Sa
      1 2 3 4 5 6 7
      8 9 10 11 12 13 14
      15 16 17 18 19 20 21
      22 23 24 25 26 27 28
      29 30

      --
      Serious? Seriousness is well above my pay grade.
  15. Mainstream coverage by mishmash · · Score: 4, Interesting

    Google news's collation of the worldwide media's coverage of this story seams to show that the mainstream serious media is ignoring this story.

    1. Re:Mainstream coverage by SpaceLifeForm · · Score: 5, Funny
      Well of course. Until they figure out a way to make some money off of it.

      Asteroid insurance anyone?

      --
      You are being MICROattacked, from various angles, in a SOFT manner.
  16. 1 miss is good by Sporkinum · · Score: 2, Informative

    If it misses the first time, it has 40 more chances to hit. The good news is that the other chances are substantially less than the first.

    --
    "He's lost in a 'floyd hole"
  17. Strange questions.... by Anonymous Coward · · Score: 5, Interesting

    Ok, we now know the probability of the object hitting the earth. What is the possibility of the object hitting the moon?

    What impact will the earth have if the object hits the moon?

    1. Re:Strange questions.... by Jeffrey+Baker · · Score: 2, Informative

      DOOM! GLOOM! Oh, except a 390m asteroid would not destroy the moon, or even necessarily alter its orbit (much). The moon has a mass of 7.35E22 kg! It is a very large rock.

    2. Re:Strange questions.... by dustinbarbour · · Score: 3, Insightful

      Though you are correct, I don't think an asteroid of this size would obliterate the moon. As such, life on Earth would remain largely unaffected I should think. If we were lucky and it hit the bright side of the moon, we may no longer have the so-called "Man in the Moon", but that would be a small price to pay to see such a terrific impact on a body so close to Earth.

  18. I can only wonder by adolfojp · · Score: 2, Interesting

    I can only wonder how high that percentage has to go before we start making plans on how to avoid the posible impact.

    Sadly, in the end it will all come down to politics. The president (any president of any country with enough power to do something about this) will want to have certainty before taking the risk of being labeled the greatest hero or the greatest fool in history. And I am not even taking international politics into account.

    I guess that it all depends on how high we value life itself.

    Cheers,
    Adolfo

    1. Re:I can only wonder by at_18 · · Score: 2, Insightful

      I can only wonder how high that percentage has to go before we start making plans on how to avoid the posible impact.

      To 100%, of course. Now that the asteroid is closely monitored, the orbit can be measured with sufficient precision in a few more weeks or months of observations.

      Given that the predicted hit is in 2029, waiting two or three months will not be fatal.

    2. Re:I can only wonder by LiquidCoooled · · Score: 2, Interesting

      What I wonder about the current orbit is the following.

      Does the asteroid come close to impacting earth on multiple occasions in the run up to this, or is the coming from a single large orbit to hit us?

      Any spacecraft sent to intercept it will have a tough time landing on this if its heading straight for us, it will need immense amounts of fuel to do a uturn in space.

      --
      liqbase :: faster than paper
    3. Re:I can only wonder by cmowire · · Score: 5, Insightful

      See, I think that there's a difference and a gift in disguise here.

      The reason why we don't have a system to deflect asteroids right now is because asteroids are one of those things that "could happen" in the far off future.

      It's like smoking. It's not guaranteed to kill you, and nobody drops dead after a single puff. Some smokers live really long lives. So smoking is viewed as something that's "bad for you", not an instant death sentence.

      Therefore, we've got a lot of people who smoke in the world.

      However, pulling out a shotgun, pointing it at your face, and pulling the trigger is unquestionably lethal.

      Therefore, the only people who do that are people who really want to die.

      The difference is that we don't always think about things that *might* cause harm, but we always think about things that *will* cause harm.

      This is just one of the many ways that the human brain is a little screwed up about risk management. It worked when we were on the plains of Africa and needed to evade predators and manage to survive, but it doesn't necessarily hold up now.

      Now, the blessing in disguize is that a quarter century is very much long enough to figure out what to do. Remember, we've got more than enough knowlege to do it -- computers to plot trajectories, a variety of tested and untested propulsion and power systems, techniques, etc. In the quarter of a century timespan, we may just need to paint one side white to provide the push. So, in some sense, it's even easier than trying to go from nothing to the moon landing.

      But what we lack, like most things in space, is a feeling of urgency to really do something about it. Thus, this is a blessing in disguize. If they give it a decent possibility of really hitting Earth, 25 years in the future, we've got time to do something about it in ways that if they said that it'll probably hit tomorrow we won't.

      Same way I know several folk who, when their doctors told them that they were going to be dead in x years if they didn't quit smoking, were able to go cold turkey.

    4. Re:I can only wonder by ArbitraryConstant · · Score: 2, Insightful

      I agree, but I think substantial action will only be taken if a country wealthy enough to do something about it will be hit or affected significantly. If it's going to hit, say, in the south atlantic, the US, the EU, China and Russia (the only ones that could possibly do something about it) will say "Meh, let's just ride this one out.". The resulting tsunami wouldn't do that much damage given a quarter century to prepare, at least not to anyone with money to do something about it.

      --
      I rarely criticize things I don't care about.
    5. Re:I can only wonder by aminorex · · Score: 3, Insightful

      Since global warming has already been observed, I'd say the chances are about 1 in 1.

      More interesting is whether a methane burp from clathrates will result in a cascade leading to a global extinction event during your lifetime.

      --
      -I like my women like I like my tea: green-
  19. HA! by jrwillis · · Score: 4, Funny

    1 in 37? Who'd be dumb enough to worry with odds like that?! Now excuse me, I need to go buy a lottery ticket for this week.

    --
    Keep Austin Weird!
  20. OMG by ikkonoishi · · Score: 2, Funny

    Uh oh. We slashdotted nasa.

    I think that might be a federal crime!

  21. I really appreciate your sig line more by way2trivial · · Score: 5, Funny

    due to your EXCELLENT math skills.

    --
    every day http://en.wikipedia.org/wiki/Special:Random
  22. So what happens if reaches 100%? by earthforce_1 · · Score: 3, Interesting

    It will be intereresting to see what happens on the political front, if it is eventually determined that this thing will hit earth.

    At 300m across, it is small enough to be nuked out of harm's way. And fortunately, we still have a lot of time on our side to plan and fly a mission to blast it to rubble, or at least into a different trajectory. But this would mean at least temporarily revoking some treaties regarding nuclear detonations in space. And how will the bill be divided up? What happens if is eventually determined that this thing will land in central Asia or Africa - will unaffected countries still be willing to pick up the tab?

    Looks like we will need to develop some sort of (funded) international contingency plan to deal with dangers from space, even if it is eventually determined this particular rock will miss us.

    --
    My rights don't need management.
    1. Re:So what happens if reaches 100%? by way2trivial · · Score: 3, Insightful
      at 300m across, it can be moved without a nuke

      gosh, maybe even just a little 'love tap'

      delta V is a function of how hard you smack it, and from how far away..

      --
      every day http://en.wikipedia.org/wiki/Special:Random
    2. Re:So what happens if reaches 100%? by mikejz84 · · Score: 2, Funny

      I think the US should pay to take care of this little problem. It may cost a trillion dollars, but it is well worth another 50 years of being able to rub the rest of the world in the fact that we saved their asses. (again)

    3. Re:So what happens if reaches 100%? by helioquake · · Score: 3, Informative

      First, my apology that I made an error in the previous post. The actual energy requied to move a 300m cube (with density of 3 g/cm3) laterally at 1km/s is about 4e16 joules (I shamefully admit that I forgot about SI unit).

      Now let's fix up some bad concepts here. First, a detonation of a hydrogen bomb will provide impulse force, neither constant or gradual. Second, there is no mass in gamma ray (it's a photon). Alpha particles will be produced but it's insignificant compared to the asteriod, so we can omit them out of our consideration.

      Now taking your number (thanks by the way), 1 mega ton TNT is about 4e15 joules. And like I said, a half of radiation just simply escapes away from the asteroid. Now suppose if the efficiency of radiative momenta is 100% (which is very unlikely, but let's assume that), then it would take 20 mega-ton TNTs at a minimum to give it a little push.

      But again, the 100% efficiency is unlikely. Some photons will part its energy into heat, or re-radiated away. So for the safety factor, I'd feel confident if we are to deploy about 10x, or 200 mega-ton TNTs simultaneously.

      It's not an impossible number, perhaps.

      (ps. I ignore many physics here; the asteroid is bounded by the Sun's gravity and so its potential field must be taken into account as well..well, I will worry about that when NASA comes knocking my door for help).

  23. Re:Early impact? by JaffaKREE · · Score: 2, Funny

    People, please stop slashdotting Nasa. It makes them look even worse. Deadly asteroids, THEN server explosions ?

  24. "May you live in interesting times" by Anonymous Coward · · Score: 2, Informative

    From article summary: Interesting times, indeed.

    "May you live in interesting times"! Aha! I get it! It's a clever ancient Chinese proverb with a double-meaning!

    Wait - no it isn't.

    Brought to you by the Slashdot FactCheck 2004 coalition - preventing inaccuracy before it starts!

  25. Re:So.... by dustinbarbour · · Score: 2, Interesting

    but it does raise the issue of needing more money put into research and defense in case an asteriod is found

    Does anyone get the idea that someone could possibly be playing with the numbers to get funding for someone's pet project? I put a certain level of trust in NASA and I don't think the current data is necessarily inaccurate, but the thought did cross my mind. What do Slashdotters think?

  26. Re:2 Interesting Conjectures by MrP-(at+work) · · Score: 2, Informative

    I think this one is about 1000 feet across, not the 16 foot one mentioned the other day

    --
    [an error occurred while processing this directive]
  27. This is a good thing by CodeWheeney · · Score: 2, Funny

    No we don't have to worry about systems with time_t defined as a 32bit signed int rolling over in 2038.

    --
    C8H10N4O2 | Developer > Code
  28. Sound betting advice by nizo · · Score: 4, Funny

    If you ever get a chance to bet on an asteroid wiping out humanity, make sure you bet that it won't; otherwise even if you win you can't collect.

  29. Form 1040-MN4 by ScentCone · · Score: 2, Funny

    So, that's a 97.29% chance that you'll still have to file your taxes two days later.

    --
    Don't disappoint your bird dog. Go to the range.
  30. Crash by pete-classic · · Score: 4, Funny

    And I thought the last crash of '29 was depressing.

    -Peter

  31. Re:keeps getting worse? by Anonymous Coward · · Score: 2, Informative

    Yeah, I did notice the 9.4.

    I also noticed the e-7. ;-)

  32. Re:2 Interesting Conjectures by Ayaress · · Score: 2, Informative

    I'm pretty sure this isn't the one. This is 1,300 feet, not 16.

    And the server's name is NEO standing for Near Earth Object.

  33. Everyone just needs to file Exempt in 2028. by madshot · · Score: 2, Funny

    I think I'm going to claim exempt for 2028.. because their is a 1 and 37 chance that I won't have to pay up.

    --
    Obama = Socialism.
  34. What time of day? by ch-chuck · · Score: 2, Funny

    I hope it's after noon - I have an important 10 o'clock meeting that morning.

    --
    try { do() || do_not(); } catch (JediException err) { yoda(err); }
  35. Chain asteroid by iMaple · · Score: 5, Funny

    How long do we have to wait for this

    Hi
    I am Prince Okabaoakauu of of the microbial strain found on Asteroid Mn4. We control the motion of our asteroid and can divert it safely if the earthlings wish so. However we are not sure if the earthlings(a.k.a. you) want a collision or not. Hence to help us decide , please forward this mail to 12 people within 1 hour of receiving the mail if you do not want a collision. You will also get a free mobile phone and 2 Ipods. If you do NOT immediately forward this email we will assume that you want the collision.
    Thanks

    I JUST RECVD THIS MAIL, PLS FWD IT TO ALL UR FRIENDS

  36. We should all be thanking our Gods... by HotNeedleOfInquiry · · Score: 2, Funny

    That there's not a Beowulf cluster of these things on the way.

    --
    "Eve of Destruction", it's not just for old hippies anymore...
  37. Another link and Impact Effects Calculator! by iamlucky13 · · Score: 4, Informative
    I found another article discussing the asteroid that isn't slashdotted. Even more interesting though is the Impact Effects Calculator

    I ran it through the calculator for a 400 meter asteroid (from the article) made of dense rock (assumed) at 17 km/s and 45 degree impact (suggested by the calculator). I also dropped it in 1000 m of water, as it has a 75% chance of landing in the oceans.

    Results
    • Impact Energy: 1.23 x 10^19 Joules
    • Crater Formed in Seafloor: 2.46 km diameter
    • Earthquake: 6.0 on Richter Scale
    • Radiant Flux at 100 km: 7.68 times that of sun
    Numbers should, of course, be taken with a grain of salt
    1. Re:Another link and Impact Effects Calculator! by Zocalo · · Score: 2, Informative
      From the Slashdotted article, the asteroid has a velocity of 12.59km/s and a diameter of 390m, which lessen things a little:
      • Impact Energy: 6.62 x 10e18 Joules (1.5GT - dead on the data given by JPL!)
      • Crater Formed in Seafloor: 2.63km
      • Earthquake: 5.8 on Richter Scale
      • The object is moving to slowly to generate a significant fireball.
      I'd assume that the larger crater size is down to the slower speed means rhat less of the mass is vaporised by heat on the way through the atmosphere. So, less damage than yesterday's earthquake due to ground tremors, but the Tsunamis generated by the impact are going to be *much* worse; the crater opened in the water has a diameter of 6.92km which is one hell of big wave.
      --
      UNIX? They're not even circumcised! Savages!
  38. The probability *should* rise before falling by da+cog · · Score: 5, Insightful

    Just because the probability keeps going up, it doesn't mean that we are getting increasingly sure that the asteroid will hit Earth. Suppose that the asteroid were going to come close to Earth without hitting it. At first, the impact probability would appear low since the "window" of orbits allowed from the data would be wide. As we got better observations, however, this window would shrink, but the Earth would stay inside it since it's near the center. Thus, for a time the probability of impact would go up, since the Earth would take up a greater percentage of the window. Eventually, though, the window would shrink past the Earth and the probability would go down again.

    I suspect that this is what will happen. Could easily be wrong, though.

    --
    Snarkiness is inversely proportional to wisdom because it emphasizes feeling right rather than being right.
    1. Re:The probability *should* rise before falling by Fuzzums · · Score: 2, Insightful

      the other possibility is it will go up all the way to... 1-in-1

      --
      Privacy is terrorism.
    2. Re:The probability *should* rise before falling by n6mod · · Score: 2, Informative

      Which is has, apparently since this posting.

      I finally got back in to NASA, and MN4 is now a Torino 0 object, with the 2029 event gone entirely.

      --
      You have violated Robot's Rules of Order and will be asked to leave the future immediately.
  39. Well Since We're /.ing the site... by firew0lfz · · Score: 5, Informative

    Crazy, I was just checking my bookmark on this when the slashdot article popped up. Anyways..

    Here is the wikipedia page explaining the Torino Scale. I still wouldn't worry about it until the thing hit at least a 8 or so. The article gives a nice explanation of what astronomers would do in warning the governments in the event they thought this thing deserved any real attention.

    Torino Scale
    --
    Try not to let life get in the way of living.
  40. Rocket Upper Stage? by LakeSolon · · Score: 3, Interesting

    I don't see the original author having posted it yet, so here's a link to an interesting theory regarding the possibility that what we're looking at is in fact just the upper stage of a rocket launched some time ago.

    ~Lake

  41. Inching up is to be expected by xihr · · Score: 3, Insightful

    Keep in mind that the very nature of the situation will result in the probability slowly creeping upward until (hopefully of course), it is eliminated entirely. The very nature of having a low-probability situation whose likelihood has to be determined with continued measurements to increase the precision of the prediction means that as the likely set of paths is refined, the cylinder that represents the likely set of paths of the asteroid shrinks. Because it shrinks, the probability that it will be at any given point in that cylinder goes up.

    At the point when the cylinder is projected to miss Earth entirely, the probability of impact will suddenly go to (very near) zero. In other words, the very nature of the situation regarding refining the data we have means that the probability will creep slowly upward before it goes to zero. (This happens for all close encounters, of course; it's just that no one's watching the actual probabilities for those too carefully.)

    So the steady rise of the impact probability may be disquieting, but it is not unexpected and does not actually indicate anything particularly additionally troubling going on.

  42. Re:One in 37 by Viking+Coder · · Score: 4, Informative

    1 in 37! Nice. =)

    (Roulette has 18 black, 18 red, and 1 green for those not in the know.)

    --
    Education is the silver bullet.
  43. Re:We're all gonna die! by glassjaw+rocks · · Score: 4, Funny

    Here's something odd. April 13, 2029 is a Friday. Friday the 13th is the end of the world.

    --
    -gjr
  44. Re:Okay... Mars Colony? by robogymnast · · Score: 2, Funny

    1) Get off our island earth and spread. Mars?
    2) Create powerful space based energy weapons to destroy this big rock.


    3) Profit?

    --
    unzip ; strip ; touch ; grep ; find ; finger ; mount ; fsck ; more ; yes ; fsck ; umount ; sleep
  45. Re:A thought on blowing it up with a warhead by Control+Group · · Score: 2, Insightful
    The bigger problem is net energy.

    If all we do is break it up, but don't generate a miss, there will still be an impact. The kinetic energy of the collision is based on mass and velocity, which the asteroid would still have virtually all of. If it can be converted into enough pieces, the surface area might be increased to a point where each piece burns up in the atmosphere (I doubt the real possibility of this, but I'll go with it as a thought experiment) - but that would still deposit all that kinetic energy into our system, it would just be as therms in the atmosphere rather than shockwaves through the ground. I have no idea what suddenly dumping something on the order of thousands of megatons of energy into the atmosphere would actually do, but I can't imagine it would be all that good from our point of view.

    --

    Reality has a conservative bias: it conserves mass, energy, momentum...
  46. Re:A thought on blowing it up with a warhead by Zocalo · · Score: 2, Informative

    This isn't Hollywood, it's highly unlikely we would actually consider blowing it into little pieces. What is far more likely is that we'd try and give the thing a series of small taps at strategic points in its orbit to deflect it. Also, you'd more likely want to try and nudge an object not so much into a different orbit, but to change the angle of inclination. If the orrbit is changed to that it is mostly above or or below the plane of Earth's orbit and passes through it at a safe distance from the actual orbit, then the risk is permanently removed.

    --
    UNIX? They're not even circumcised! Savages!
  47. Re:A thought on blowing it up with a warhead by Chyeld · · Score: 2, Funny

    Ok, how else do you plan on getting a League of Super Friends formed? Think people, THINK!

    In reality, I would hope whatever plan they would use would break it into small enough pieces that the majority would burn up in the atmosphere.

  48. Whatever you do by Hyksos · · Score: 2, Funny

    Don't Panic

  49. The next X-Prize by kevinx · · Score: 2, Funny

    it can be the next X-Prize. First one to destroy the rock wins.

    On a lighter note.. So, what do you think will kill us first, this asteroid or global warming?

  50. Odds of hitting the moon? 0. by Anonymous Coward · · Score: 2, Informative

    It isnt going to hit the moon, as it is on the other side of the earth when the asteroid is suposed to hit.

  51. Girls in the neighborhood by tekrat · · Score: 2, Funny

    Just think of the possibilities. You could build a asteroid-proof shelter in your backyard, and then, when it's clear that the human race has only hours left to live, you invite all the cute chicks from your neighborhood into your shelter, so that can ... ehem... repopulate the Earth.

    Finally, slashdot readers get laid.

    This would almost make it worth wiping out civilization as we know it.

    --
    If telephones are outlawed, then only outlaws will have telephones.
  52. Re:One in 37 by JustinXB · · Score: 2, Insightful

    I thought two green? A double zero and a zero?

  53. Three days ahead of the tax deadline. by Dr.+Mu · · Score: 3, Funny

    The IRS income tax deadline in 2029 will be Monday, April 16th. I think, perhaps, I'll file for an extension that year.

  54. Impact effect of a grain of salt. by JeanPaulBob · · Score: 4, Funny
    Numbers should, of course, be taken with a grain of salt
    As you suggest, I ran the figures for a grain of salt through the impact effects calculator.

    Specifically, I used a 0.0003 meter grain of salt with a density of 2165 kg/m^3 (suggested by the I'm Feeling Lucky result for how big is a grain of salt) at 17km/s and 45 degree impact, and dropped it in 1000 meters of water.

    Results
    • Impact Energy: This projectile is so small that it burns up during atmospheric traverse
    • Crater Formed in Seafloor: Are you kidding?
    • Earthquake: It burns up in the freakin' atmosphere!
    • Radiant Flux at 100 km: You're an idiot.
    I really don't see what you're so worried about.
  55. New Reality TV Series. by Alkaiser · · Score: 2, Funny

    "Survivor: Asteroid Impact"

    You compete with 20 others to get a spot in the emergency bunkers.

    No holds barred.

    --
    Netjak.com independent reviews of domestic & import video ga
  56. How about Asteroid ownership by Zhu Guangya by aisnota · · Score: 2, Informative
    The asteroid was discovered by a Chinese observatory and its international code is No. 10388



    Zhu Guangya is a physicist and is a member of Chinese Academy of Sciences (CAS) and the Chinese Academy of Engineering. He has been instrumental in shaping China's development programs for the A-bomb and the H-bomb. Being a strategic scientist, Zhu has helped create the country's long-term development of defense technology.


    Noting his crucial role in country's technological development Lu Yongxiang, president of china handed over a certificate of asteroid possession to Zhu at ceremony and workshop last Sunday.

    --
    http://www.aisnota.com/slashdot/ Welcome to Logic and the Future
  57. Free Tacos? by telemonster · · Score: 3, Funny

    Does everyone in the world get a free Taco if it hits a Taco Bell?

    --
    Southeastern Virginia REPRESENT!
  58. Re:One in 37 by TheCabal · · Score: 3, Interesting

    American roulette wheels have 2 greens. There are a few tables here in Vegas that have single green, and the smart roulette player (oxymoron) will take a few minutes to find that table. Most of the big Strip casinos don't carry them, or may have one, tucked away somewhere. The off-Strip casinos are a bit more open with their roulette wheels, or placement of low-minimum blackjack tables (try finding a $5 table at one of the big Strip casinos after 5PM).

  59. It's a booster rocket shell by bhima · · Score: 2, Insightful

    really!! do some research

    --
    Nothing in the world is more dangerous than sincere ignorance and conscientious stupidity.
  60. If it crashes the aliens better buckle up... by Marton · · Score: 3, Informative

    According to this calculator the crater would be about 9 kilometers in diameter, it would cause a 7.1 strong earthquake and a 44 m/s shockwave a hundred kilometers from the epicentre. (Assuming 90 degree collision angle and iron composition - basically, the worst.)

    Note that this assumes 4940 megatons in kinetic energy, and Nasa says it's "only" 1600.

  61. realistically... by zogger · · Score: 2, Interesting

    ...should the odds look grim and there's only x-small amount of seats off planet, I would wager it's the guys with the biggest guns and the willingness to use them who would get off planet, and I doubt they would let any civilian politicians or generic stupid random rich farts go for a ride either, they would tell them to fudge off. To get loyalty from their other troops, they would hold a lottery for the last few seats, to insure no counter revolts, with winners only announced at the last second. Maybe.

    Even then it might not occur, jealous other military forces might attack with such force that no one gets off the planet at all. And by 2029 I *doubt* we will have much of a space launch ability anyway, I think a thousand all at once would be pushing it. I've weatched the space race since going outside and staring up trying to see sputnik, and frankly, it ain't all that far along compared to what I thought would happen way back then. and even with rutans and virgin airlines help, it still won't be that much further along in the 20's unless there's some sort of dramatic breakthrough to replace chemical reaction rocket engines. They are just too expensive for huge mass production, require a lot of people to get a few people off the ground and lots of work. And you'd still have the problem of how would you get the ground crew to cooperate? Like stated, what good is money. Now, maybe large balloons, or blimps might be sufficient, not sure, but it would be worth a try and a heck of a lot cheaper to mass produce..I bet mass prouction you can make decent Model T blimps for the price of a car. Add in some groceries and grog, good to go for a week of floating above the destruction. Earth quakes and Tsuanmis you could fly over and float around for awhile until things settled down. Even if the winds blow ya around, so what, let em. strap in.

    That might be more doable on a somewhat larger scale than just 1,000 people. You would think after a few days it would be enough settled to reland someplace.

    Me,with a big ole asteroid coming in, and say no blimp or rocket, naked barbecue! Dead mans dinner, surf and turf! Well,proly wear a grease spatter apron, got to be practical about these things. Then kick back in the lawn chairs and watch the show! Hmm, maybe loot a bank and play monopoly with real money and deeds to properties waiting for it to show up. sort of like new years eve countdown.

    Ya, ya, I know, you young guys all thinking the same thing, "hang out with the ole lady ya tarded fool, get you a bunch..."..Sure,sure, sure, sure, but get that out of the way the week before the show. I mean, you can get lucky anytime, how often do you get to see a PLANET SMASHER hit? We are geeks, some things are just *important*.

    Anyway, that one is too small, need a much larger one for a good fireworks show. The Mayans claim no history past 2012 anyway, something like that I was reading.

  62. Hello, 23,000 killed in tidal waves? by raehl · · Score: 3, Insightful

    Mainstream media can only handle one natural disaster at a time, and the one that happened NOW is more important than the one which has a 2.7% chance of happening in 25 years.

    Also, we should expect the probability of impact to continue to increase until it either goes to zero (most likely) or 1. This asteroid has a sigma of 0 - that means the MOST LIKELY path is impact. More observations are most likely going to eliminate the outlying paths first, so as we eliminate more and more of the outlying paths of possibility the most likely path will be more and more likely.

    Until we get the observation that says "Ah, yeah, definitely going to miss", and then it'll be zero again.

  63. Re:A thought on blowing it up with a warhead by Junior+J.+Junior+III · · Score: 2, Informative

    Yes, some, possibly. But keep in mind that a decent-sized nuclear blast should be enough to fully vaporise that rock. Most of the vapor will be dispersed over a WIDE area (just how wide depends entirely upon how far away it is from Earth when destroyed). And most of that vapor will have a trajectory significantly altered from the original path of the asteroid, and will miss Earth entirely. The real key is to hit it when it's well away from Earth, and preferrably well away from the Earth's orbital plane.

    --
    You see? You see? Your stupid minds! Stupid! Stupid!
  64. This just in: asteroid to miss Earth. by shawkin · · Score: 3, Informative

    Latest NASA update shows limited chance of impact.
    1 in 56,000.

  65. It is going to miss by Foddrick · · Score: 2, Interesting

    Looks like the odds have changed again. Down to 1 in 56,000 - It's even a zero on the torino scale now. Check it out here.

  66. DOWN TO 1 in 56,000 by Xshare · · Score: 2, Informative

    http://neo.jpl.nasa.gov/risk/2004mn4.html I don't know what happened, but it's suddenly a 0 on the torino scale, etc. And impact date has changed to being 2039+... could that mean a return trip from the sun or something? Whatever happens, seems this story is over.

  67. Now Torino 0 by xihr · · Score: 2, Informative

    And, in fact, hitting the page now (15:30 Pacific time), it's clear that the risk is gone; the object is now a Torino 0 (for all projected future encounters).

  68. Already Dead by Cheirdal · · Score: 2

    Most Slashdot readers we'll be long dead by 2029. Most probable causes of death: 1) Cheese fries, 2) Toppings on Leftover pizza gone bad, 3)Heart explodes from extremely high levels of caffeine combined with causes 1 and 2.

  69. Probability is now way lower.... by testednegative · · Score: 2, Interesting

    Is this A) Government trying to keep it secret so they can cause less panic ? B) Simple mistake C) NASA cover up so they can relocate everything and save millions and be the only survivors. Not A as the government CAUSES panic, not dampens it... Not B as a mistake from 1 in 37 probabilty to now 1 in 56,000 is not exactly in the margin of errors that people would expect a government agency to be within. :o /me covers private parts with aluminum foil

  70. Torino scale updated - 0 by S3D · · Score: 2, Informative

    It seems the updated measerments striked it out from the list. Torino 0, cumulative probability 1.8e-5

  71. JPL has updated its 2004 MN4 risk assessment. by magnuss · · Score: 2, Informative

    FYI.

    "JPL has updated its 2004 MN4 risk assessment, dropping its Torino Scale rating to zero, and eliminating completely all impact solutions before the year 2037. Overall impact probability is put at one in 55,556. "

    Source:

    http://www.hohmanntransfer.com/news.htm
    http:// neo.jpl.nasa.gov/risk/2004mn4.html

    1. Re:JPL has updated its 2004 MN4 risk assessment. by cnettel · · Score: 2, Interesting

      Interestingly enough, the first observation has been lowered to March, instead of June, and the total number of observations is down to 118 from around 170.

      This seems to mean they identified this object in old shots from March and from that data could eliminate quite a lot. This is confirmed in your source. BUT, it also seems to mean that they in the process threw out 50 observations as faulty?! Some kind of later explanation of this lowered total number would surely be interesting. Was the wrong celestial body observed by some people? Or is the identification of the object in March more certain than a lot of more recent observations? Any insights?

  72. Updated, odds now at 1.8e-05 by mackman · · Score: 2, Informative

    Move along, nothing to see here.

    http://neo.jpl.nasa.gov/risk/2004mn4.html