International audienceWhile remote observations of the linear polarization of five low-albedo Near-Earth asteroids are available at large phase angles, space missions have collected material on the surface of two of them and one of them is already back to Earth. The structure of the regolith on the surface may be different from that encountered on larger objects, because of their low gravity and thermal stress cycling. Dust particles crushed from low albedo meteorites (i.e. Orgueil and Allende) are tentatively used as analogues to try and provide a better approach of such regoliths. The PROGRA2 experiment studies the light scattering properties of dust particles of various size distributions under Earth gravity either deposited or with clou...