Riley (Venus)

Named after Margaretta Riley - English botanist (1804-1899).

Riley is a crater on Venus. The crater is 25 kilometres in diameter. The floor of the crater is 580 metres below the plains surrounding the crater. The crater's rim rises 620 metres above the crater floor. (wikipedia entry)

A crater is a circular depression likely created by an impact event. On Venus they are named after deceased women who have made outstanding or fundamental contributions to their field (if over 20 km). If smaller common female first names are used.