Asteroid Apophis orbit from recent observations

Details Asteroid Apophis orbit from recent observations Asteroid Apophis orbit from recent observations

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf.1212b&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.1212

Mathematics

Probability

Scientific paper

Since its discovery in 2004, asteroid (99942) Apophis previously designed 2004 MN4 became a study case. It was the first asteroid who reached level 4 on Torino Scale for a possible collision with the Earth in 2029. The last observations for Apophis were made in 2008 and the last results conclude on a collision probability of 1/250000 for the 2036-threat. Recent observations were made at Pic du Midi Observatory (France) and at Magdalena Ridge Observatory (New Mexico). We propose here an update of Apophis's orbit and the new predictions of encounters with Earth taking into account the Yarkovsky effect and stellar catalogue biases.

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