From data describing the orbit of the star S2 around the black hole at the centre of the Galaxy, Sagittarius A*, calculate the black hole's mass in solar mass units. The period (P) of S2 is 15.559 years; the orbital eccentricity (e) is 0.88; and the parigalacticon distance (d) is 1.835 * 1013 m.
For more information on how to do this problem, and for tables of relevant data, see
www.canismajor.ca.