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 | | Although there is officially still no Spaceguard Survey as an internationally agreed NEO search program, there exist several such programs, mainly in the U.S.A., which continuously scan the skies for objects with unusual apparent motion. |
 | | The currently most prolific NEO search programs are LINEAR, Spacewatch, Catalina Sky Survey (CSS), and LONEOS, (as well as NEAT, which is not operational at the moment) - all based in the U.S. Minor contributions are (or were) made by the Beijing Astronomical Observatory NEO Program, ODAS, and at Siding Spring in Australia. |
 | | The goal of the Spaceguard Survey is to determine the extent of the current NEO population, and its size distribution, from which estimates of the impact hazard posed can be made from collision probability considerations. |
| ecf.hq.eso.org /~ralbrech/amico/intabs/hahng.html (1045 words) |
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