EntityQ972542· pop 33· linked from 900 articlesNGC 654Sign in to saveopen cluster in the constellation CassiopeiaConnectionslist of NGC objects (1–1000)EntityHeart NebulaEntityNGC 241EntityNGC 945EntitystarEntityMilky WayEntitygalaxyEntityInternational Standard Book NumberEntitylight-yearEntityconstellationEntitynebulaEntityWilliam HerschelEntityAndromeda GalaxyEntityexoplanetEntitydigital object identifierEntityparsecEntityCassiopeiaEntitystar clusterEntityapparent magnitudeEntityTriangulum GalaxyEntityCategoriesAstronomical objects discovered in 1787Cassiopeia (constellation)Discoveries by William HerschelNGC objectsOpen clusters