In reply to  Jed Rothwell's message of Mon, 04 Feb 2013 15:02:45 -0500:
Hi,
[snip]
>Eric Walker wrote:
>> If the mass of an orbiting satellite is sufficient to deflect the 
>> incoming asteroid, I doubt the asteroid is big enough to do much upon 
>> impact.  If the asteroid is big enough to do much, I doubt the mass of 
>> a satellite would deflect it even by a small amount.
>
>I agree. Bear in mind that most satellites are light objects because 
>rocket payloads are small. Most satellites are about 1 ton (1000 kg) I 
>think. A 50 m asteroid weights approximately 200,000 tons, according to 
>Deep Space Industries, Inc. I think asteroids are considered dangerous 
>when the size is 30 to 50 m.
>
>- Jed

This one is not as wide as it is long, so I estimate the mass at about 70000
tons.

Regards,

Robin van Spaandonk

http://rvanspaa.freehostia.com/project.html

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