Summary of the observational results of monitoring the S2-Sgr A* orbit from 1992 to the end of 2019. Left: SHARP, NACO (black points), and GRAVITY (blue points) astrometric positions of the star S2, along with the best-fitting GR orbit (grey line). The orbit does not close as a result of the SP. The mass centre is at (0,0), marked by the cross. All NACO and SHARP points were corrected for a zero-point offset and drift in RA and Dec. The red data points mark the positions of the infrared emission from Sgr A* during bright states, where the separation of S2 and Sgr A* can be directly inferred from differential imaging. Right: RA (top) and Dec (middle) offset of S2 (black and blue) and of the infrared emission from Sgr A* (red) relative to the position of Sgr A* (assumed to be identical with the mass centre). Grey is the best-fitting GR-orbit including the Rømer effect (finite speed of light), SRT, and GR to PPN1. We assumed f_RS = 1 and fitted for f_SP. Bottom right: same for the line-of-sight velocity of the star.