If You Found an Exoplanet Whose Mass Was the Same

If you found an exoplanet whose mass was the same as Jupiter's,but the planet orbited its star with a period of 2 years and a semimajor axis of 1 AU,what would be the mass of its star? For reference,Jupiter has a semimajor axis of 5.4 AU and an orbital period of 12 years.

A) 0.25 M_⨀
B) 0.5 M_⨀
C) 2.0 M_⨀
D) 1.5 M_⨀
E) not enough information available to answer

Correct Answer:

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