EntityQ2633345· pop 12· linked from 159 articlesHR 8799 eSign in to saveextrasolar planetExoplanet dataHost starHR 8799Discovered2010Discovered byW. M. Keck ObservatoryOrbital period20815.60 daysRadius13.11 × EarthMass3178.30 × EarthEquilibrium temp1150 KDistance41.24 pcvia NASA Exoplanet ArchiveConnectionsThe Astrophysical JournalEntitymethod of detecting extrasolar planetsEntityCategoriesExoplanets detected by astrometryExoplanets detected by direct imagingExoplanets discovered in 2010Giant planetsHR 8799Pegasus (constellation)