Asteroid Comet Impact Hazards - Florida International University

Potentially Hazardous Asteroids
Update On Asteroid 1999 AN10
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JPL Near-Earth Object Program Office
July 13, 1999
As announced in MPEC 1999-N21, a trail of asteroid 1999 AN10 was discovered on plates taken in
1955 from the Palomar Sky Survey. The nominal and minimum-possible close-approach distance
for the 2027 Earth encounter are now 0.00260 AU and 0.00258 AU respectively (about 389,000
km). Preliminary analyses indicate that the 2044 and 2046 impacting key-holes are well outside the
current 2027 impact-plane error ellipse. This implies that those previously highly unlikely impacts
are now virtually impossible. The next Earth close-approach is in 2076 and will likely be between
0.046 and 0.009 AU (6,900,000 and 1,300,000 km).
http://neo.jpl.nasa.gov/neo/1999an10.html (1 of 2)12/5/2005 4:29:07 PM
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Asteroid 1999 AN10
January 26, 1955
Prediscovery image of
asteroid 1999 AN10 taken
from the Palomar Digital Sky
Survey. The faint streak is the
trail left by the asteroid. The
image has been contrastenhanced.