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99942 Apophis (provisional designation 2004 MN 4) is a near-Earth asteroid and a potentially hazardous object, 450 metres (1,480 ft) by 170 metres (560 ft) in size, [3] that caused a brief period of concern in December 2004 when initial observations indicated a probability of 2.7% that it would hit Earth on Friday, April 13, 2029.
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In a bit of ominous news befitting a Friday the 13th: It turns out that the asteroid Apophis could have a very small chance of colliding into Earth in five years, when it is expected to make a ...
Further research has since been done, however, which revealed the probability of Apophis passing through the keyhole was extremely low. [ 1 ] Keyholes for the nearer or further future are named by the numbers of orbital periods of the planet and the asteroid, respectively, between the two encounters (for example “7:6 resonance keyhole”).
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Ramses, or Rapid Apophis Mission for Space Safety, is a proposed ESA mission to a near-Earth asteroid 99942 Apophis.If approved, it is expected to be launched in April 2028, to arrive at Apophis in February 2029, before its closest approach to Earth.
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The potential impact in 2036 would also be April 13, but the nominal solution shows the closest approach of 2036 as occurring around 23 March 2036. Thus Apophis and Earth will not be in the same place at the same time in 2036. -- Kheider 18:21, 10 January 2013 (UTC) The phrase closest approach has a more NPOV connotation.