Asteroids Approaching the Earth from Directions around the Sun

Details Asteroids Approaching the Earth from Directions around the Sun Asteroids Approaching the Earth from Directions around the Sun

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996em%26p...72..263i&link_type=abstract

Earth, Moon and Planets, Volume 72, Issue 1-3, pp. 263-266

Astronomy and Astrophysics

Astrophysics

4

Scientific paper

We have estimated close asteroid encounters with the Earth by numerical integrations of a system with the Sun, 9 planets, and 188 near-earth-asteroids during the period 1994 4600. Asteroids approach the Earth from directions within 30‡ around the Sun in more than 20% of encounters with the closest distance less than 0.01 AU. Since ground-based observations cannot detect these objects, we should develop space-borne and/or lunar observatories in a short time to allow enough warning time before a catastrophic collision.

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