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PChar
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Homework Statement
If a comet passes close to the Earth with a velocity of 38km/s, how far is the apocentre of its orbit from the Sun? What is the eccentricity of its orbit?
Homework Equations
Vis-Viva Equation:
(V)[itex]_{ecc}[/itex][itex]^{2}[/itex] = GM [ [itex]\frac{2}{R}[/itex] - [itex]\frac{1}{a}[/itex] ]
Apocentre distance:
a(1 + e)
The Attempt at a Solution
I found the semi-major axis using the vis-viva equation, but I'm really not sure what to do next,I think I should be trying to find where the radial velocity is zero, but I don't seem to have enough information.