EntityQ778639· pop 15· linked from 156 articlesHR 8799 dSign in to saveextrasolar planetExoplanet dataHost starHR 8799Discovered2008Discovered byW. M. Keck ObservatoryOrbital period37000 daysRadius13 × EarthMass3000 × EarthEquilibrium temp1300 KDistance41.24 pcvia NASA Exoplanet ArchiveConnectionsastronomical unitEntityW. M. Keck ObservatoryEntityCategoriesExoplanets detected by direct imagingExoplanets discovered in 2008Giant planetsHR 8799Pegasus (constellation)