Houston — 
NASA's Near Earch Object Program Office has recently announced that the asteroid named 2004 MN4, discovered last June, has the highest risk of earth impact to date. In the December 23 annoncement, NASA advised that the 400-meter wide asteroid has a 1 in 300 chance of colliding with earth.  As scientists gather more data on 2004 MN4, the probability of collision with earth is expected to decrease.
The level of impact risk is measured in terms of Torino Impact Hazard Scale, and the MN4's score was initially 2 out of 10. 2004 MN4 is expected to come closest to the Earth on April 14, 2029. 


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Near-Earth asteroid 2004 MN4 reaches Torino Scale hazard rating 4