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Orbital Dynamics/Keppler's Law

  1. Dec 3, 2008 #1
    1. The problem statement, all variables and given/known data
    An asteroid revolves around the sun with a mean orbital radius twice that of Earth's. Predict the period of the asteroid in Earth years


    2. Relevant equations

    I guess t^2/r^3 where t = period and r = mean orbital radius


    3. The attempt at a solution
    I missed the lecture in class, and I'm ultimately confused on the subject of Orbital Dynamics and Kepler's Law, any help/explanation would be great, or a link to a useful website, honestly I'm clueless. I think the fact that the r for the asteroid is twice as long as earth's creates a ratio?
     
  2. jcsd
  3. Dec 3, 2008 #2

    fluidistic

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