Planetary Defense Conference

Bruce Betts reports from the Planetary Defense Conference in Romania

Day1: http://www.planetary.org/blog/article/00003026/

75% of one-kilometer-diameter asteroids have been discovered and 85% of those larger than a kilometer, a total of 914 objects as of May 1, 2011. About 25% of Apophis-size (about 300 meter) asteroids have been found, and smaller percentages of smaller-sized ones. 

Day2: http://www.planetary.org/blog/article/00003028/

IR astronomy and was used in part to find NEOs -- and it sure was successful. From a non-optimized orbit, NEO-WISE, as they called the NEO part of the Wide-field Infrared Survey Explorer, discovered 132 near Earth asteroids.

Anders Sandberg on Mitigating Asteroid Risk

http://ieet.org/index.php/IEET/more/sandberg20110513

A Space-Based Near-Earth Object Survey Telescope in Support of Human Exploration, Solar System Science, and Planetary Defense

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20110011348_2011011214.pdf

Find out more here:

http://www.pdc2011.org/