and other sources, gave a concurring period of () and () hours, respectively. Each modeled lightcurve also determined two spin axes of (92°, 66°) and (244°, 54°), as well as (91°, 70°) and (250°, 45°) in ecliptic coordinates (λ, β), respectively. Diameter and albedo According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), Hirundo measures (), () and () kilometers in diameter and its surface has an albedo of (), () and (), respectively. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0853 and a diameter of 28.70 kilometers based on an absolute magnitude of 11. The WISE-team also published two alternative mean-diameters of () and () with a corresponding albedos of () and (). Notes References External links 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 000706 Discoveries by Joseph Helffrich Named minor planets 000706 19101009