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Update On Asteroid 1999 AN10
NASA 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).
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 contrast-enhanced.