For other uses, see Discovery.

The USS Discovery (NCC-1798) was a Constitution-class Federation heavy cruiser starship of the mk III subclass, ordered for construction in the 23rd century, entering service on reference stardate 2/1010. Discovery was converted as an mk IV subclass refit vessel on stardate 2/1202. (FASA RPG module: Federation Ship Recognition Manual)

According to the TOS reference: Star Fleet Technical Manual, the registry number NCC-1798 was originally authorized to be used by a vessel named USS Czar'ak. It is not known if that vessel was built, so one assumption that could be made is that the ship being built with that registry had its name changed to Discovery at some point.
Ships named Discovery
United States of America Discovery (OV-103, space shuttle) Flag of the United States.
United Earth, Earth Starfleet Discovery (NX-04, NX-class)USS Discovery (NCC-100, Discovery-class) Seal of United Earth image. Seal of the Earth Starfleet image.
Federation, Starfleet USS Discovery (Daedalus-class)USS Discovery (NCC-1031, Crossfield-class)USS Discovery (NCC-1798, Constitution-class)USS Discovery (NCC-3006, Royal Sovereign-class)USS Discovery (NCC-62049, Nebula-class)USS Discovery (NCC-52333, Steamrunner-class) Seal of the United Federation of Planets image. Seal of the Federation Starfleet image.
Terran Empire (mirror universes) ISS Discovery (NCC-1031, Crossfield-class) Terran flag image.
Achernar-subclass (Constitution-class mk III class I/class XI cruiser/heavy cruiser starships)
Refit with mk III engines BismarkBonhomme RichardChallengerConstellationConstitutionDefiantEagleEl DoradoEndeavourEnterpriseEssexExcaliburExeterFarragutHoodHornetIntrepidKentKongoLexingtonPotemkinRepublicSaratogaValiant IIYamatoYorktown UFP emblem image. Seal of the Federation Starfleet.
Built to mk III specifications AchernarAkagiArk RoyalCaspanChikumaDiscoveryForrestalKagaKitty HawkLangleyLittorioMarseilleRadetskyRichelieuRivoliSantissima TrinidadSiriusTiconderogaVictory
Authorized for construction AhzdarAlam'akAlferazAlfrAndrocusAnnobonAstradBehr'akCzar'akEkinusElohimEsablEskiisGalinaGharGhondrHajjHiemdalHorokJassanJenshahnJupiterKarsKasimarKep SaluKestralKetoiMaatMazdaMengenMirazhMondoloyMongoNdeleOblikOomaruPaeganPariPelionePhardosPilarProcyonProximaQizanQual'atQuindarRigil KentaurusSalaynaSamaaraShaandraShahrSinuijiSolTajarhiTaliTemirTheloniiTholusTulanTutakaiXanthiiYaanZa'faranZaahmZindar
Tikopai-subclass (Constitution-class mk IV class I/class XI cruiser/heavy cruiser starships)
Refit to mk IV specifications DiscoveryEl DoradoEndeavourForrestalHornetKentKitty HawkLangleyLittorioRadetskyRichelieuSaratoga UFP emblem image. Seal of the Federation Starfleet.
Built to mk IV specifications AcruxBellatrixBinarCapellaDenebEl NathHeliosRegulusRigelTikopaiVega
Authorized for construction AdharaAgenaAldebaranAliothAlkaidAlnilamAltairAnakAntaresArcturusAridedBetelgeuseCanopusCastorDarionDubheFomalhautHorK'hotanK'ushuiLuxMiaplacidasMirfakMurzimNakaratPolarisPolluxSardarShaulaSpicaVenaWezen
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