Asteroid Comet Impact Hazards - Florida International University

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NASA Astrobiology Institute http://nai.arc.nasa.gov/ (2 of 2)12/5/2005 4:25:17 PM + Freedom of Information Act + The President's Management Agenda + FY 2004 Agency Performance and accountability report + NASA Privacy Statement, Disclaimer, and Accessiblity Certification + Freedom to Manage Last Updated: November 21, 2005 NASA Official: Krisstina Wilmoth + Comments and Questions
Near-Earth Object Program Artist's conception of the Hayabusa spacecraft. + View the NASA Portal Hayabusa's Contributions Toward Understanding the Earth's Neighborhood Don Yeomans August 11, 2005 Beginning in early September 2005, the Japanese Hayabusa spacecraft will rendezv ous with near-Earth asteroid (25143) Itokawa. Itokawa, a 600 meter sized, potatoshaped asteroid, is named after Hideo Itokawa, a Japanese rocket pioneer. Although the primary objectives of the Hayabusa mission are to test new technologies, the mission will also provide a wealth of scientific returns. For the three month period from September through November 2005, the science instruments on board the Hayabusa spacecraft will undertake an intensive study of near-Earth asteroid Itokawa. After closely observing the asteroid for several weeks, a few pellets will be fired from the spacecraft at close range into the asteroid's surface and about a gram of the pellet's impact ejecta will be collected into a sample capsule. This capsule will then be brought back to Earth and parachuted into the Australia outback in June 2007 so that some of the asteroid's surface minerals can be studied in Earth-based laboratories. This will be the first asteroid sample return mission. FULL STORY NASA's Deep Impact Generates Its Own Spectacular Photo Flash July 4, 2005 The hyper-speed demise of NASA's Deep Impact probe generated an immense flash of light, which provided an excellent light source for the two cameras on the Deep Impact mothership. Deep Impact scientists theorize the 820-pound impactor vaporized deep below the comet's surface when the two collided at 1:52 am July 4, at a speed of about 10 kilometers per second (6.3 miles per second or 23,000 miles per hour). "You can not help but get a big flash when objects meet at 23,000 miles per hour," said Deep Impact co-investigator Dr. Pete Schultz of Brown University, Providence, R.I. "The heat produced by impact was at least several thousand degrees Kelvin and at that extreme temperature just about any material begins to glow. Essentially, we generated our own incandescent photo flash for less than a second." http://neo.jpl.nasa.gov/ (1 of 2)12/5/2005 4:26:04 PM
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Page 21 and 22: Bibliography 12/5/2005 Asteroid and
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Potentially Hazardous Asteroids Pla
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Potentially Hazardous Asteroids Rel
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Asteroid 1997 XF11 (Earth Close-App
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Related Links 12/5/2005 Related Lin
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Related Links The Spacewatch Projec
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Documents Tunguska Home Documents B
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THE TUNGUSKA METEORITE PROBLEM TODA
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The Sky Has Split Apart - The Cosmi
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Report on the Tunguska Internationa
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Report on the Tunguska Internationa
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GEOMAGNETIC EFFECTS AS ONE ASPECT O
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THREE STAGES IN METEORITE RESEARCH
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THREE STAGES IN METEORITE RESEARCH
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NEAR-EARTH ASTEROID TRACKING orbit
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Asteroid Comet Impact Hazards - Florida International University

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