Central mass distribution in the GC. Right: enclosed mass in the GC as a function of radius. The flare motions constrain the black hole mass of M = (4.2 ± 2.0) × 10⁶ M_⊙ to be enclosed within less than 9 R_g. Out to 10⁶ R_g the potential is dominated by the MBH, as the comparison with theoretical estimates shows (solid and dashed lines). Left: astrometric flare data overlayed on the EHT observation of Sgr A* (Event Horizon Telescope Collaboration 2022) that provides a constraint at a similar radius.