(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

We will compute the orbit of Eris, the infamous \tenth planet" that caused Pluto

to be demoted to \dwarf planet" status. Eris (also called 2003 UB313 in the

textbook) has a semimajor axis a = 68:048 AU and eccentricity e = 0:4336 based

on the best current observations. Calculate the orbital period P of Eris (in years).

2. Relevant equations

P^2=4pie^2)/G(m1+m2)) (a1+a2)^3

3. The attempt at a solution

would i just use this formula? I know it would work but not sure if i am suppose to use something else cause i was given eccentricity, but could not find any formula that uses it to find orbital period

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# Homework Help: Orbital period of a planet

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