Friday, February 13, 2009
SpaceWeather has the story, a great animation of the collision (2.3 Mb), and a link to the sound of radar pings off the debris. Real Time Satellite Tracking also has a nice animation. The Bad Astronomer discusses the maths of the collision here and here.
Over at meteorobs everyone is discussion whether the impact will result in re-entries with visible fireballs. Despite being at around 800 Km, studies of the FENGYUG 1 debris from the Chinese anti-satellite impact suggest that there may be a slow but steady rain of material over the years (about 10 Kg of material over 10 years, maybe the occasional fireball, but not a spectacular rain of fireballs).