Question: ( i ) In the Galactic Centre the star S - 0 2 orbits Sgr A * once every 1 6 . 0 5 1

(i) In the Galactic Centre the star S-02 orbits Sgr A* once every 16.0518 years. The semi-major axis of its orbit is 0.12540 arcsec. Determine the mass of Sgr A*[3 marks] Hint: You may take the distance to Sgr A* as 8.5 kpc.

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