Link derives an albedo of 0.0404 and a diameter of 39.84 kilometers based on an absolute magnitude of 11.1. Alternative mean-diameter measurements published by the WISE team include (), (), (), () and () with corresponding albedos of (), (), (), () and (). On 4 May 2004, an asteroid occultation of Nora gave a best-fit ellipse dimension of (), with a poor quality rating of 1. These timed observations are taken when the asteroid passes in front of a distant star. 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 000783 Discoveries by Johann Palisa Named minor planets 000783 000783 19140318