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	The 601st Earth Asteroid Impact :: Astrobiology Magazine :: Search for Life in the Universe (Site not responding. Last check: 2007-10-09)
		March 16, 2880, is the day the asteroid known as 1950 DA, a huge rock two-thirds of a mile in diameter, is due to swing so close to Earth it could slam into the Atlantic Ocean at 38,000 miles per hour.
		Asteroids the size of 1950 DA have probably struck the Earth about 600 times since the age of the dinosaurs," Ward said.
		The 60,000-megaton blast of the impact vaporizes the asteroid and blows a cavity in the ocean 11 miles across and all the way down to the seafloor, which is about 3 miles deep at that point.
	www.astrobio.net /news/article482.html (1467 words)

	(29075) 1950 DA - Wikipedia, the free encyclopedia
		Asteroid 1950 DA is an asteroid considered to be the near Earth object with the highest known probability of crashing into Earth, according to the Palermo Technical Impact Hazard Scale.
		Radar observations were made at the Goldstone and Arecibo Observatory from March 3 to 7, 2001 during the asteroid's 7.8 Gm approach to the Earth (a distance 21 times larger than that separating the Earth and Moon).
		Since the re-discovery of 1950 DA, scientists have been considering various asteroid deflection strategies.
	en.wikipedia.org /wiki/Asteroid_1950DA (310 words)

	Planetary Society: Future Asteroid Impact
		The asteroid in question is a chunk of space rock on a 2.2 year long elliptical orbit, that brings it within 77 million miles of the Sun - well inside the Earth's orbit.
		Further research revealed that the asteroid was also present (though not noted) in astronomical photographs from the 1980s.
		This means that in a scenario where the asteroid is relatively fast, and "pulling ahead" in its orbit relative to its average course around the Sun, it later on "slows down" and is pulled back towards its "normal" position.
	www.planetary.org /html/news/articlearchive/headlines/2002/1950DA.htm (1425 words)

	SPACE.com -- The Lucky Case of Potentially Deadly Asteroid 1950 DA
		Headline: The Lucky Case of Potentially Deadly Asteroid 1950 AD While not exactly scratched on the back of envelopes, asteroid impact odds are based on frustratingly small data sets and terribly loose formulas that leave wide margins of error.
		Asteroid 1950 DA might or might not hit Earth in the year 2880, according to a report that will appear in the April 4 issue of the journal Science.
		The long time frame, along with new radar observations of the asteroid's surface, allowed a crack team of leading experts to consider a host of factors they would not normally be able to include when projecting an object's orbit into the future.
	www.space.com /scienceastronomy/solarsystem/asteroid_1950da_020404.html (1064 words)

	Homework Assignment 1
		This asteroid was discovered by optical telescopes in 1950, and then was lost for roughly 50 years, when it was rediscovered.
		The overall distance to the asteroid is determined by sending a radio pulse out towards the asteroid, and then running a clock to see how long it takes for the reflected pulse to return.
		However, due to the shape of the asteroid, the parts that are closer to the Earth send the reflected pulse back earlier than part that are farther from the Earth.
	www.colorado.edu /physics/phys2170/phys2170_fa03/HOMEWORK/Homework/H1.html (375 words)

	Foreseeing danger! - Asteroid will hit Earth in 2880 (Site not responding. Last check: 2007-10-09)
		Known as 1950DA, the asteroid was first discovered 53 years ago and is the only one - of the many thousands discovered so far - which astronomers have been unable to dismiss as a threat to Earth.
		The 107-metre-wide asteroid is likely to strike the oceans, which represent 70 per cent of Earth's surface.
		Based on the assumption that the asteroid would strike the Atlantic at 61,000 km/h, Ward and Asphaug predict that it will blow a hole all the way down to the seabed and 18 km across.
	news.indiainfo.com /2003/06/02/02asteroid.html (361 words)

	Giant Asteroid May Strike Earth in 2880 - PRAVDA.Ru (Site not responding. Last check: 2007-10-09)
		However, 1950DA asteroid is the most dangerous one for the time being.
		Asteroid 1950DA is not so large to destroy life on Earth, as it happened 65 million years ago, when another huge space rock ran into the planet.
		However, the asteroid will most likely hit the Pacific Ocean, for it is the largest ocean on the planet.
	english.pravda.ru /printed.html?news_id=10230 (645 words)

	RedOrbit NEWS \| Could Trotter's plucky motor save the planet? (Site not responding. Last check: 2007-10-09)
		Asteroids and comets whiz past, coming close enough to pose a real threat of wiping out life as we know it.
		And although the newly discovered asteroid that scared everyone earlier this month was quickly shown to be a false alarm, the "big one" with our name on it may already have been found, says Genge.
		With 10 years to spare, simple expedients such as painting one side of an asteroid could help divert it, as could a "mass driver", a machine that pitches objects off of an asteroid's surface, thus imparting a tiny force.
	www.rednova.com /modules/news/tools.php?tool=print&id=8687 (667 words)

	Space & Astronomy News - Killer tsunamis if asteroid hits Earth in 2880 - 02/06/2003
		Asteroid 1950DA is the only one scientists have been unable to entirely dismiss, with a team at the U.S. National Aeronautics and Space Administration (NASA) reporting last year in the journal Science that a collision remains a threat.
		The probability of a direct hit from 1950DA is about 0.3% - a probability NASA reports could increase or decrease as the asteroid's orbit is calculated with the aid of further observations.
		Rather than blowing up rogue asteroids - which could cause a spray of equally menacing smaller rocks - the current plan is to sprinkle light coloured material on the asteroid.
	pandora.nla.gov.au /pan/23316/20030723/www.abc.net.au/science/news/space/SpaceRepublish_867646.htm (859 words)

	cooltech.iafrica.com \| tech news Asteroid to hit Earth in 2880
		The asteroid - known as Asteroid 1950DA - was discovered in 1952, and its orbit has been bringing it steadily closer to an unpleasant encounter with Earth.
		Naturally it is extremely difficult to predict the exact behaviour of the asteroid on such a long timescale, and natural occurences could occur to change the path of the asteroid.
		At nearly a kilometre wide Asteroid 1950DA is almost the exact size of the one which struck Mexico 65-million years ago, wiping out the dinosaurs.
	cooltech.iafrica.com /technews/921369.htm (543 words)

	Guardian \| How Del Boy's old motor could save the world
		All it would take to stop an asteroid the size of Ben Nevis from destroying civilisation would be a nudge from a Robin Reliant.
		This information could be handy, because a one-kilometre-wide asteroid called 1950DA could all but destroy the world 877 years from now, Matt Genge of Imperial College told the British Association festival of science, which ended in Salford yesterday.
		Most asteroids could be diverted by steady pressure from a small engine or given a swift push from a chemical explosion.
	www.guardian.co.uk /print/0,3858,4752756-103616,00.html (521 words)

	Giant Asteroid May Strike Earth in 2880 - PRAVDA.Ru (Site not responding. Last check: 2007-10-09)
		According to recent calculations, the giant asteroid might collide with planet Earth on Saturday, March 16th, 2880.
		Huge asteroids the size of 1950DA have struck Earth about 600 times, since the era of the dinosaurs.
		Based on the assumption that the asteroid would strike the Atlantic at 61,000 km/h, the scientists predicted it will blow a hole all the way down to the sea bed and 18 km across.
	english.pravda.ru /science/19/94/377/10230_asteroid.html (966 words)

	Absolute Write Water Cooler - View Single Post - Deep Impact
		Actually, Asteroid 1950DA is on a collision course with Earth and will strike In Feb of 2880.
		Just in 2005, there have been 10 asteroids that missed us by less than 20% the distance from the Earth to the sun, the closest being just 5/100 the distance between the Earth and the sun.
		There was an asteroid/comet explosion in the upper atmosphere in the 90's that was roughly the same size as a Hirohima atomic bomb, but it barely even made the news because it explode over a remote section of the south pacific and caused no damage.
	www.absolutewrite.com /forums/showpost.php?p=115948&postcount=13 (523 words)

	Scientific American: Avoiding the Impact (Site not responding. Last check: 2007-10-09)
		Schweickart says that future asteroids that threaten to strike must be pushed out of their orbits by advanced space technologies.
		Asteroids circle the sun on paths that may cross the orbit of Earth.
		Asteroid 1950DA, which is two-thirds of a mile wide, is expected to come close to Earth in the year 2880.
	www.sciam.com /print_version.cfm?articleID=0005979A-3A5E-1D23-97CA809EC588EEDF (1426 words)

	SPACE.com -- Asteroid Might Hit Earth in 2880, Unless it is Painted
		However, scientists are not worried; a little chalk, some charcoal, or perhaps a giant bucket of paint and the asteroid known as 1950 DA could be flung harmlessly off course if need be.
		The asteroid swings inside Earth's orbit on its closest approach to the Sun, then travels out to the main asteroid belt between Mars and Jupiter.
		In fact, the odds of impact in 2880 may be practically zero, depending on the asteroid's axis of rotation, which greatly affects how it absorbs and radiates solar energy.
	www.space.com /scienceastronomy/solarsystem/asteroid_deflection_020404.html (1359 words)

	ipedia.com: Asteroid deflection strategies Article (Site not responding. Last check: 2007-10-09)
		With the discovery in 1999 that Asteroid 1950DA may collide with the Earth in 2880, this problem has been taken more seriously by politicians and scientists.
		An asteroid impact by a 10 km asteroid on the Earth is widely viewed as an extinction-level event, likely to cause catastrophic damage to its existing biosphere.
		One might propose firing nuclear missiles at incoming asteroids would solve the problem, but it can be easily demonstrated that the energy required to destroy a 1km wide asteroid would be much larger than the energies available from nuclear explosives.
	www.ipedia.com /asteroid_deflection_strategies.html (705 words)

	The world's top 1950 da websites
		1950 DA is an asteroid considered to be the near Earth object with the highest known likelihood of crashing into Earth.
		The asteroid was first discovered on February 23, 1950 by Carl A. Wirtanen; it was observed for 17 days and then faded from view for half a century.
		Radar observations were made at the Goldstone and Arecibo Observatory from March 3 to 7, 2001 during the asteroid's 7.8 million km approach to the Earth (a distance 21 times larger than that separating the Earth and Moon).
	dirs.org /wiki-article-tab.cfm/1950_da (309 words)

	Target Earth Updates
		Excerpt (in the asteroid section): Mounted at the survey telescope's focal plane, the SDSS imaging camera simultaneously scans the sky through five rows of color filters: u (for ultraviolet), g (for green), r (for red), i (infrared), and z (a longer wavelength infrared band).
		Plotting these quantities for all known asteroids shows clumps with similar orbits, termed "families." It has long been suggested that the members of a particular family are shards of a larger single body that was broken up in a collision some time ago.
		Planetary scientists have predicted that asteroid colors should evolve as the rocky objects' surfaces are altered by the solar wind and by micrometeoroid impacts.
	www.lawrencehallofscience.org /PASS/TargetEarth (3617 words)

	Absolute Write Water Cooler - Deep Impact
		The government might cover up a comet or asteroid impact if they could, but the truth is they can't.
		Now, there is a 1,300 foot wide asteroid headed our way that does stand a chance of striking.
		But if some big 'ol asteroid was about to smack us, I'd be getting you to light me up a nice fat stogie, and an even bigger reefer.
	www.absolutewrite.com /forums/printthread.php?t=4433 (2008 words)

	Cowlix: Mar 31, 2002 - NEO collision in 2880?
		Asteroid has a date with Earth, but not quite yet: A team led by two NASA scientists using the
		asteroid 1950DA has a 1 in 300 chance of hitting the Earth in 2880.
		Armageddon day comes on March 16, 2880, when the asteroid's path leads it directly across the earth's orbit.
	www.cowlix.com /wcowley/log/2002/03/31/000873.shtml (87 words)

	Asteroid has a date with Earth, but not quite yet (Site not responding. Last check: 2007-10-09)
		The asteroid, more than half a mile in diameter, is similar in size to the one thought to have plunged into the sea off Mexico 65m years ago, depriving the earth of light and wiping out the dinosaurs.
		The warning follows data collected last year when the rock, codenamed Asteroid 1950DA, made its closest approach to earth since it was discovered 52 years ago.
		It could hurtle by in the narrowest of misses — or be captured by earth’s gravity, punch a hole in the atmosphere and smash to earth.
	www.freerepublic.com /focus/chat/656604/posts (1383 words)

	sciforums.com - RE: killer Asteroid
		I believe nukes are the best way to deflect a asteroid or comet: we send up volley after volley, blow them up right up against the asteroid or comet to change its trajectory.
		If it's a large iron chunk, then a close nuke in an enclosed crater would provide a good shove...a stony asteroid may allow the same thing, but it could also potentially fracture, and then the fragments may or may not be a problem.
		1950da spins quite fast, this implies that it is composed of a rocky/metallic material.
	www.sciforums.com /showthread.php?p=274185 (1688 words)

	Pushing The Limits Predicting The Next Asteroid Impact
		Asteroid 1950 DA was discovered from Lick Observatory, Mount Hamilton, Calif., in 1950.
		Effects of each small influence on the asteroid's movement could be amplified by 15 gravitational tugs during close approaches to Earth and Mars -- none of which have any chance of an impact -- prior to 2880.
		If future generations' studies of 1950 DA indicate it ought to be diverted to prevent a collision, the subtle influences that its physical properties have on its motion might be manipulated to advantage.
	www.spacedaily.com /news/deepimpact-02e.html (1196 words)

	Archeoastronomy
		Besides comets and asteroids, there are believed to be some very peculiar objects that could hit the Earth, and may already have done so.
		Drawing with it the entire solar system, including of course all the comets of the Oort Cloud and the Kuiper Belt, the Sun is locked in a vast orbit around the galactic nucleus of the Milky Way, completing each revolution in a period of approximately 250 million years.
		Asteroids or comets that puncture the upper atmosphere can either strike the Earth’s surface and leave an impact crater, such as the well-known Barringer Crater (which used to be called “Meteor Crater”) in Arizona, caused by an iron asteroid some 50,000 years ago.
	www.barnesreview.org /July_2004/Archeoastronomy/archeoastronomy.html (3376 words)

	Asteroid may hit earth in 2880 (Site not responding. Last check: 2007-10-09)
		Asteroid may hit earth in 2880 - The Times of India
		US scientists have calculated that an asteroid headed for Earth in 2880 could - if it collides -trigger massive "tsunami" waves that would drown many coastal areas.
		Known as 1950DA, the asteroid was first discovered 53 years ago and is the only one - of the many thousands discovered so far -which astronomers have been unable to dismiss as a threat to Earth.
	www.nrilinks.com /news/n/12/6304.aspx (108 words)

	Cowlix: March 31, 2002 Archives
		It took two years of hard work, but finally, on March the 12th, NASA announced that Sentry, its new automatic asteroid impact monitoring system, was beginning to be operated out of Jet Propulsion Laboratory.
		To be more precise, Sentry is a highly automated system, designed to help scientists better communicate about the discoveries of new, potentially threatening Near Earth asteroids (NEAs) and their follow-up observations.
		NEODyS CLOMON impact monitoring system, operated in Pisa, and researchers from the two systems are cooperating to check and improve their results.
	www.cowlix.com /wcowley/log/2002/03/31 (379 words)

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