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They Changed the Date for 2005 YU55???!!!!
Ms Sans Serif
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[quote:Halcyon Dayz, FCD:MV8xNjc3NjU0XzI3NzI1NTI4XzU0NEFGRUZE] [quote:humuhumubannedbutgotthrough 3209328:MV8xNjc3NjU0XzI3NzI0NDI5XzlBMzNDMzM5] If the moon were hit, [b]I cannot do the math, but I know[/b] its orbit would be greatly affected, and its pull on earth would be modified. [/quote] (Emphasis mine) Who are you trying to fool here? Yourself? :book: Let's actually do the maths. A back-of-the-envelope first Order of Magnitude calculation. For simplicity we'll presume the asteroid is a cube 1 kilometre to a side, mostly made of lead, to get an average density 10 grammes per cubic centimetre, moving at a preposterous 100 km/s. The mass of such an object would be 100,000(cm)^3 * 0.01 (kg/cm^3) = 10,000,000,000,000 kg or 10 billion tonnes. The mass of the Moon is something like [b]7.35 × 10^22 kg[/b]. Which is 7,350,000,000 times as much. So in a perfectly inelastic collision the object can transfer 1/7,350,000,000 of its velocity on the Moon. Which gets me 0.0136 millimetre per second. There's a reason engineers and scientists call doing an OOM calculation a sanity check. :book: BTW, have you [i]seen[/i] the size of some of the craters on the Moon? [/quote]
They now have the date as for 2005 YU55 as 11/8/2011!!!!
When did that happen?
How can they change the date and it keep the same trajectory?
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