# Finding orbital period

Tags:
1. Nov 15, 2015

### PAstudent

1. The problem statement, all variables and given/known data

2. Relevant equations
(In picture)

3. The attempt at a solution
(In picture)

2. Nov 15, 2015

### SteamKing

Staff Emeritus
The distance of each star from the c.o.m. of the system is not L/2. Each star in the group is located L/2 from the two stars immediately adjacent.

3. Nov 15, 2015

### Mister T

You start with the formula $T^2=\Big( \frac{4 \pi^2}{GM} \Big)r^3$ where $M$ is the mass of the attracting body.

But in your solution you use $M$ for the mass of each orbiting sun.