1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Asteroid's orbital radius and speed

  1. Nov 6, 2004 #1
    somebody help me start this question

    The asteroid belt circles the sun between the orbits of Mars and Jupiter. One asteroid has a period of 5 earth years. What is the asteroid's orbital radius and speed?

  2. jcsd
  3. Nov 6, 2004 #2
    I believe you need the mass of the sun, unless you are allowed to give your answer as a function of that variable. Use this formula:
    [tex]T=\frac{2\pi r^{\frac{3}{2}}}{\sqrt{Gm_{sun}}}[/tex]
    where G is the universal gravitational constant and T is the orbital period.
  4. Nov 7, 2004 #3
    is this right

    will the period be 31536000s. if it is, is this right:
    [ 31536000*sqrt(6.67*10^(-11)*(1.99*10^(30)))/(2*pi)]^(2/3)
  5. Nov 7, 2004 #4
    Check your period calculation again. Your method looks correct.
  6. Nov 7, 2004 #5
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook