A plausible orbit of ESO 137−001 within the Norma cluster. Upper panel: grayscale: ICM distribution. The timestep t = 0 Myr corresponds to the current location of ESO 137−001. The orbit is extrapolated into the future. The galaxy approaches the cluster center for the first time. Middle panel: ram pressure profile. Lower panel: solid line: last ram pressure stripping event of middle panel; dotted line: solid line multiplied by a factor of 2.5; dashed line: ram pressure profile of the highest-ranked model A (red line in Fig. 3).