What is the precession of the star S62? What is the angle of precession of the star S62 orbiting the Milky Way supermassive black hole?
According to wikipedia it is 10 degrees.  Wikipedia cites Peißker et al, 
which uses the formula:
$$\Delta\phi = \frac{6\pi G}{c^2}\frac{M}{a(1-e^2)}$$ to derive a relativistic periapse shift of 9.9 degrees per orbit.