Let X be a point in the line OI (O circumcenter, I incenter). Let XaXbXc be its pedal triangle. The perpendiculars from the excenters Ea, Eb, Ec to the lines FXa, FXb, FXc (F the Feuerbach point) concur at a point in the Jerabek hyperbola of EaEbEc. A particular case is r652.