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Asteroid could hit Earth in 2029 - Russian astronomer
An asteroid, discovered in 2004, could pose a threat to Earth in 2029, the director of the Institute of Astronomy said Monday.
Boris Shustov said at an international space forum in Moscow that the Apophis asteroid, which is due to cross earth's orbit in 2029 at a height of 27,000 km, could under certain conditions hit Earth in 2029.
The explosion could surpass the famous Tunguska explosion of June 30, 1908, which affected a 2,150 square kilometre  area of Russia felling over 80 million trees in the Krasnoyarsk Territory in Siberia.
The meteoroid's air blast was estimated to be between 10 and 20 megatons in TNT equivalent or 1,000 times more powerful than the atomic bomb dropped on Hiroshima. The explosion caused a shockwave around 5.0 on the Richter scale.

Source Novosti

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Apophis
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Like a scene from the hit film Armageddon, British engineers have joined a competition to try and save the Earth from a catastrophic collision with an asteroid which could be heading our way.
Apophis is a 300-metre-wide asteroid and is still millions of kilometres away.
But, in 2029, its orbit will take it worryingly close to Earth closer than many satellites.


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UK space scientists and engineers have designed a mission to investigate a potentially hazardous asteroid.
The 300m-wide (984ft) rock, known as Apophis, will fly past Earth in April 2029 at a distance that is closer than many communications satellites.
Astrium, based in Stevenage, Herts, wants a probe to track the asteroid so its orbit can be better understood.

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Near-Earth Object
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In the late 1990s, Opik, a keen star-gazer (even then), warned that the world was sleepwalking into armageddon by ignoring the threat of a major asteroid impact.
His warnings were widely lampooned. But when the comet Schumaker Levy 9 left an earth-sized hole in Jupiter, the government quickly changed its mind and set up an all-party task force to assess the risk of a fatal collision with a near-earth object (NEO).

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Apofiz-99942
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Russias Pulkovo Space Observatory estimates that on April 13, 2029, Apofiz-99942 (the inverted three 6s are not lost on the superstitious) will be at its closest distance to the Earth for 200 years. Apofiz (spelled Apophis in the West) will pass the Earth at a distance of 30,000 to 40,000 km. Whatever happens, the Earth will suffer from the effects of the close encounter with this asteroid.
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RE: 2004 MN4
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Nobody paid attention, but in February scientists reported that on 4/13/36 an asteroid is projected to make a very, very close encounter with earth. The good news is that scientists said theres only a 1 in 10,000 chance that this thing will hit earth. The bad news is that they give those chances now---29 years in the future. Itll be the closest pass of any foreign object we can remember. That is, of course, if it passes. Other good news--we may all have different priorities in 29 years.
But the usual caveats are used in this prediction. They also say that, Informal analysis indicates that the accuracy of our knowledge of the asteroids trajectory using optical and radar tracking is likely to be inadequate to make a timely deflection decision in the improbable event that one should be needed. If one deciphers, the words informal, accuracy, inadequate, and deflection seem to stick out like sore thumbs.

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Experts say an asteroid 300 meters in diameter could hit Earth in less than 30 years.
There has been recent talk in the scientific community about Apophis, an asteroid discovered in June 2004. Initially, it was believed it could hit the Earth in 2029, but it's path was later recalculated.
Further investigation shows that it will enter a "gravitational keyhole" and renew it's chance of hitting the Earth by 2036.
Matthew Lister, assistant professor of physics, said that based on past records, an asteroid this size hits Earth about once every 10,000 years.

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Apophis
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A giant asteroid named Apophis could be on a trajectory to careen into Earth in 2036. That was the prediction NASA scientists made in 2004, suggesting a 1 in 37 chance that the space rock would hit our planet.
The danger has since receded—the revised likelihood that Apophis will hit Earth is 1 in 45,000. But the close call has galvanized efforts among scientists to predict and hopefully prevent a potentially apocalyptic impact.

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