In April 2019, the Event Horizon Telescope took an image of the ring of plasma lensed around the shadow of a supermassive black hole (M87*) for the first time, as seen in the eht-imaging reconstruction (Left). Our investigations have just begun, as the analysis of ring properties enable us to constrain parameters of M87* including mass and spin. The estimated angular width of the segment from the image center to centroid of the radial intensity profile is plotted over time on a histogram (Top Ri