Fw: NUFOIA: Close shave with asteroid
- -----Oorspronkelijk bericht-----
Van: Ndunlks@... <Ndunlks@...>
Aan: undisclosed-recipients:; <undisclosed-recipients:;>
Datum: woensdag 5 januari 2000 6:23
Onderwerp: NUFOIA: Close shave with asteroid
|Wednesday, May 19, 1999 Published at 17:16 GMT 18:16 UK
|Close shave with asteroid
|The suspect asteroid is one kilometre wide
|By BBC News Online Science Editor Dr David Whitehouse
|A large asteroid could miss the Earth by only 38,000 kilometres in 2027,
|according to new astronomical observations. This is an extremely close
|- the Moon orbits 10 times further from Earth.
|The calculations suggest that an impact is not possible that year but, in
|theory, the Earth's gravity could perturb the asteroid's path, possibly
|leading to an impact in 2039.
|The near-miss trajectory of a newly-discovered asteroid, called 1999 AN10,
|was announced in April. Now, the observational data of Australian
|F. Zoltowski allows calculations of just how close the asteroid may come to
|Closer and closer
|Astronomers at the Minor Planet Center at the US Smithsonian Astrophysical
|Observatory used Zoltowski's work to work out an estimated approach
|for AN10 of 56,500 kilometres from Earth. The fly-by will occur on August
|But the closest possible distance that AN10 could come to the Earth on that
|day is only 38,000km.
|The calculations suggest the asteroid will not impact. But the new
|calculations confirm the initial speculation that the asteroid might
|within the Earth's sphere of gravitational influence.
|It could therefore be perturbed in such a way that it might impact some
|Impossible to predict
|Dr Benny Peiser of Liverpool John Moore's University in England says that
|chaotic behaviour of this asteroid makes it practically impossible to
|all possible approaches for more than a few decades after any close
|He says the orbit will remain dangerously close to the orbit of the Earth
|about 600 years.
|Astronomers stress that a collision is only one of a range of possibilities
|for this kilometre-wide chunk of rock. If it did strike, it would cause
|continent-wide devastation and alter the Earth's climate.
|BBC News | Sci/Tech | Close shave with asteroid</A>
|Looking for educational tools for you kids?
|Find everything you need at SmarterKids.com
|-- Easily schedule meetings and events using the group calendar!