This can be written as:
\[T^2 = \frac{4\pi^2}{G} \times \frac{r^3}{M}\]
where:
- \(T\) is the period of the orbit,
- \(G\) is the gravitational constant,
- \(r\) is the radius of the orbit, and
- \(M\) is the mass of the central body (in this case, 243 Ida).
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