A nearby red dwarf in the southern constellation of Pictor that has the second largest proper motion (8.72" per year) of any star, after Barnard's Star. It is also the nearest halo star (see halo population) to the Sun, the nearest star that orbits the Galaxy backward, and a high-velocity star (radial velocity +242 km/s). It is named after Jacobus Kapteyn, who discovered its large proper motion in 1897.