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Asteroid 137126 (1999 CF9) Earth Flyby – Closest Approach in August 23,2013 Size 1,6 km
Thursday, August 22, 2013 5:46
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A potentially hazardous object (PHO) is an asteroid (PHA) or comet (PHC) with an orbit such that it has the potential to make close approaches to the Earth and a size large enough to cause significant regional damage in the event of impact.
These objects are monitored by NASA with contributions from others including amateurs.
The reason they can become hazardous is that their trajectory can variate due to gravitional fields from Planets or Stars (ore other objects).
Overall the chance of a potentially hazardous event due to these objects is about once in 10,000 years.
Asteroid 137126 (1999 CF9) makes closest approach at 0.063 au (Aug 23,2013)
= about 24.7 times distance to the moon (=ld)
Size: 700 m – 1.6 km
Discovered 1999-Feb-12 by LINEAR at Socorro
This Asteroid will makes its next closest approach at 3-8-2025
It has a cycle of about 12 years and 200 days
source: http://www.zapaday.com/event/273367/0/Asteroid+137126+1999+CF9+Earth+Flyby+at+0+063au.html
