of hours and an amplitude of magnitude (). The results supersede a tentative period determination of hours by René Roy from 2005. Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), Cupido measures () kilometers in diameter and its surface has an albedo of (). Other publications by the WISE team give a mean-diameter of (), () and () with a corresponding albedo of (), () and (), respectively. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a Flora asteroid of 0.20 and calculates a diameter of 8.97 kilometers based on an absolute magnitude of 12.6. References External links Minor Planet Lightcurve Data, Frederick Pilcher Lightcurve Database Query (LCDB), at www.minorplanet.info Dictionary of Minor Planet Names, Google books Asteroids and comets rotation curves, CdR – Geneva Observatory, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 000763 Discoveries by Franz Kaiser Named minor planets 19130925