Proper motion diagram of the JH survey. The mean motion of the Pleiades lies at the center [(19.71, −44.82) mas yr^-1] of the black circle of radius of 13 mas yr^-1. The size of the circle corresponds to 1σ astrometric error bar of the faintest selected candidates. Red solid circles stand for unresolved cluster candidates with two or more proper motion measurements; resolved sources are shown with green triangles; photometric cluster nonmembers are depicted with violet crosses; and the three faint objects complying with our photometric criteria found next to the astrometric circle of the Pleiades are shown with blue solid squares (see text). The tiny black dots around (0, 0) stand for a subsample of the entire volume of over 43 000 analyzed sources. The uncertainty associated with the proper motion analysis is shown at the bottom-left side of the panel.