Happelia (minor planet designation: 578 Happelia) is a minor planet orbiting the Sun. On 24 February 2017 a possible small 3-kilometer moon was found orbiting the asteroid, based on occultation observations. References External links Lightcurve plot of 578 Happelia, Palmer Divide Observatory, B. D. Warner (2008) Lightcurves 578 Happelia, tripod.com Asteroid Lightcurve Database (LCDB), query form (info ) Dictionary of Minor Planet Names, Google books Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center Background asteroids Happelia Happelia Xc-type asteroids (SMASS) 19051101