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Asteroid to Make Closest Recorded Pass to Earth
unassimilatible writes "A 100-ft diameter asteroid will make the closest (26,500 miles, or about 3.4 Earth diameters) pass of earth ever detected in advance today, NASA reports. Asteroid 2004 FH's point of closest approach with the Earth will be over the South Atlantic Ocean. Using a good pair of binoculars, the object will be bright enough to be seen during this close approach from areas of Europe, Asia and most of the Southern Hemisphere. While we are in no danger this time, it is good to know NASA's LINEAR guys are on the job, for when that Death Star-sized object pays us a visit."
According to the article there are normally 2 of these every year. It seems a bit tongue-in-cheek to say "The important thing is not that it's happening, but that we detected it" [Chesley]. They were lucky, that's all.
:-)
It *will* give them a chance to study the thing as it passes, since all the other ones were only detected after they'd gone (and presumably therefore couldn't be easily studied). If it's close enough to see with binoculars, it ought to be possible to resolve quite well in a good optical 'scope.
The other point I guess is that it's only 100 ft across (why not 30m ?) so it would have burnt up on entry into the atmosphere, but still, good to know about these things. An asteroid that big would make quite some bang on entering the atmosphere, I reckon
Simon
Physicists get Hadrons!
Time to dust off the "Thumb" and see if I can get off this godforsaken mudball.
Is the asteroid construction-equipment yellow, with lots of lumps?
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If you hear the thunder, that means the lighting didn't kill you.
If you hear the gunshot, the bullet didn't kill you.
If you smell the engine burning, the car wreck didn't kill you.
If you are still reading, the asteroid missed.
it was going to hit the earth and cause a massive extinction of the human race...
I highly doubt we will be told about it. Instead, our world leaders will gather in a cave somewhere with their mistresses and 500 years worth of refried beans...that ought to keep the human race going.
-Grump
Is it true that more people vote for the winner of American Idol, than vote for the president? -Ali G.
Any astronomers out there know if this will have a measurable gravitational affect on the planet? I know it's awfully small on a planetary scale -- but it's mass might be great. And, as I understand it, we're pretty good at detecting gravitational shifts. I know there won't be high tides or coastal flooding -- just if an object that small will have ANY noticable effect.
Nothing great was ever achieved without enthusiasm
So that we can all enjoy the peace-of-mind of knowing that we're all about to die, in advance. ;)
Here's what I do: Bitty Browser & Andromeda
Either there's an ever increasing number of asteroids coming ever closer to Earth (unlikely methinks) or this is truly indicative of how blind we have been all thse years to what was happpening in space.
Sort of puts our achievements into perspective...
/. Where the truth
"Using a good pair of binoculars, the object will be bright enough to be seen during this close approach from areas of Europe, Asia and most of the Southern Hemisphere."
Great. Now even the Universe hates America.
The first one is not a miss, it's just used for calibration. The second will be create a 10 cm crater but its organic content will exterminate all life on this miserable rock.
Section of an IAU Statement prepared by Dr. David Morrison, 14 March 1998
The International Astronomical Union's (http://www.intastun.org/) list of 108 known ''potentially hazardous objects,'' or PHOs.
Most of the asteroids that could strike the Earth and cause a global catastrophe have not yet been found. For the year 2028 (or any other year) the chances of an unknown asteroid hitting the Earth are much greater than the chances of this particular asteroid hitting. If an unknown asteroid should hit us, we would likely have no warning at all. The first we would know of the danger is when we saw the flash of light and felt the ground shake. At the current rate of discovery, it will take more than a century to find 90% or more of the objects this large with Earth-crossing orbits. For better or for worse, the astronomers who carry out these searches and orbit calculations work in the public eye. The idea that a threatening asteroid could be kept secret (or that anyone would want to keep it secret) is ludicrous.
For further information see the NASA asteroid and comet impact hazard website at:
will one hit us already, the suspense is killing me.
I always wanted a seaview from my city apartment.
Is there a LINEAR@Home type thing? I would prefer to use my spare cpu cycles protecting life on earth. "meta-environmentalism" I guess.
meh
Imagine if you will that this thing actually penetrated the atmosphere. Okay - so it wouldn't reach ground, but there would likely be a fairly significant blast (this one is only about 1/3 to 2/3 the diameter of the Tunguska object, and that one made a hellish blast).
Imagine now that this penetrated the atmosphere over, say, North Korea, or the Sea of Japan, or somewhere over India/Pakistan. It is not much of a stretch to suggest that this might precipitate a limited nuclear exchange. Not a for-sure, but enough of a "could-be" that somebody's day could be ruined.
This is why it is important to look for (small) potentially hazardous objects - not because they will (directly) cause the extinction of the human race, but because they could precipitate an all-too-human conflict, just out of ignorance.
Note also that, as good a job as LINEAR and others do, there is a class of asteroids that are damn hard to see form the ground - the "Aten"-class asteroids, which orbit mostly inside earths orbit and thus come at us from out of the sun. These ones also need to be catalogued and a watchfull eye kept out for.
So, when people start to ask the value of asteroid hunting, bring up these ideas. Sadly, nuclear war is a much more real threat to most people compared to mass extinction.
...NASA officials say they detected the asteroid after it hit a parked car in Queens....
From what I am reading in the articles on the net, 100 feet can still create some serious, albeit localized damage. If this bad boy were to hit over the ocean, probably not much, but over land, it could cause serious local destruction. Anyone out there serious about their astronomy?
The Tunguska Blast over Siberia was an object about 100 meters in diameter. Sure it burned up in the atmosphere, but it was devastating to the ground anyway. This article also mentions that at about 50 meters, these rocks make it through the atmosphere and can do serious localized damage. So, since 100 feet converts to is 30.48 meters, this rock would more than likely to have an effect that we will notice on the ground.
For further reading, here is a site that has already compiled links and information And, of course, the Yahoo listings on Earth Impact information online.
InnerWeb
Freud might say that Intelligent Design is religion's ID.
Plug in some numbers and find out :)
copper
Really. Being hit by a planetkiller that causes extinction of humans on the earth doesn't worry me. Who will miss us?
My biggest fear is that we will be hit by a not-quite planetkiller that will cause enough devastation to ensure the survivors live in misery for the rest of their (short) lives. That would suck.
There is much cruelty in the universe, John.
Yeah, we seem to have the tour map.
I have an acquaintance. Call him...Jack. (Name changed to protect the obsessed.) Jack has picked two goddamn things about which we can do absolutely nothing to freak him out: near-Earth asteroids and megavolcanoes. He was my friend's boss for a while, and we ended up at a lot of the same parties and restaurants and such. He would always corner me, because I was usually the only aerospace engineer there, and talk for hours about how life as we know it was shortly going to be wiped out by a really big rock, and how this was the greatest threat ever to face humanity.
After this happened a couple of times, I told him that I was comfortable playing the odds that an extinction-level event would hold off for the couple of centuries it would take us to actually be able to deal with it, given the scale of geologic time time to human achievement. He nearly spit his beer across the room.
In conclusion: Space is really big, really empty, and some people just need things to worry about.
-Carolyn
Like Daddy always said: if you can't dazzle 'em with brilliance, baffle 'em with bullshit.
geo-synchronous satellite. 26km is just about their orbit. Shouldn't we try to protect them?!?
The cesspool just got a check and balance.
The death star in Star Wars was able to shatter a planet to pieces. One can calculate that the energy needed to overcome the gravitational pull is about G*rho^2*r^5, where G=the gravitational constant, rho the planet's density, and r its radius. For an earth-sized planet, that amounts to 1e30 J, or 6e13 kg of matter to be converted into energy. If the Death Star were completely consisting of concentrated antimatter, then it would have been 3 km in diameter and be able to fire exactly one shot. Yes, that is more than 100 ft. :)
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Intelligent life evolved from chimp-like creatures once. It could happen a second time.
Slashdot is jumping the shark. I'm just driving the boat.
It takes the earth about 6 minutes to travel a distance equivalent of its own diameter.
So basically, to avoid a direct hit, the the timing of of a near-earth-asteroid only needs to be altered by 6 minutes over the course of its orbit(s).
What I can't get over is that we *missed* this asteroid by only 12 to 18 minutes!
That's just crazy.