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83 Leonis A is a K class orange subgiant and the primary star of the Cheron system, located about 58 light-years from Earth and the Sol system, formerly under Romulan control until 2160 where it later was placed on the Federation side of the Romulan Neutral Zone. It lays about 80 billion kilometers from its B sibling, or more than 500 times the average distance between Earth and Sol. 83 Leonis A also has more of a planetary brood than its counterpart, having started off with more mass, and therefore was hotter. As a consequence, A had already exhausted its supply of hydrogen fuel, limiting its internal nuclear fusion processes to helium and heavier elements, therefore actively transitioning into a bloated red giant. This would be unfortunate for any humanoid-type life-forms that might have arisen in the A system.[citation needed]

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Stars, systems and objects of the Leo constellation
39 LeonisAlpha Leonis (Regulus)CN Leonis (Wolf 359)Delta Leonis (68 Leonis, Zozma)Eta LeonisMu Leonis (Mu Leonis A) • Omega LeonisOmicron Leonis (No'Mat)Theata Leonis
Alpha and Beta Quadrant stars and star systems (0-9)
5 Arietis6 Arietis6-156-237 Ursae Minoris12 Lyncis13 Arietis19 Tauri22 Hydrae22 Ophiuchi25 Tauri37 Cassiopeiae43 Aquarii47 Draconis56 Arietis57 Arietis61 Ursae Majoris74 Tauri77 Ursae Majoris78.56/3.54/23.4483 Beta114 Delta114 Trianguli128 Trianguli334 Scorpii415 Arietis780 Arietis4725 CancriSystem 330System 7348 Alpha and Beta Quadrant icon image.
Alpha Quadrant stars and systems (0-9) 1 Herculis2 Ophiuchi3 Coronae Borealis4 Aurigae5 Coronae Borealis6 Delphini7 Aurigae7 Delphini8 Aurigae8 Canum Venaticorum10 Canum Venaticorum10 Lyrae11 Lacerti12 Canum Venaticorum12 Draconis13 Aurigae13 Draconis14 Draconis14 Lyrae15 Lyncis15 Sagittae15 Virginis16 Ceti16 Cygni17 Andromedae17 Aquilae17 Piscis Austrini20 Draconis21 Andromedae (21 Andromedae A21 Andromedae B) • 21 Boötis23 Draconis24 Cassiopeiae26 Pegasi27 Herculis30 Boötis31 Aquilae33 Aurigae33 Draconis34 Aquarii34 Aurigae35 Ophiuchi37 Cygni37 Serpentis38 Sagittarii40 Capricorni42 Boötis43 Andromedae44 Persei46 Andromedae50 Cygni50 Serpentis51 Pegasi53 Aquarii53 Aquilae56 Aurigae57 Andromedae57 Serpentis59 Aquarii61 Cygni61 Draconis63 Draconis65 Herculis70 Ophiuchi92 Herculis94 Aquarii99 Herculis112 Tauri218 Persei329 Aurigae492 Lyncis1440 Ophiuchi (1440 Ophiuchi B) • 1616 Ophiuchi1865 Serpens4408 Trianguli Alpha Quadrant icon image.
Beta Quadrant stars and systems (0-9) 1 Centauri1 Orionis2 Corvi3 Canis Minoris3 Eridani5 Virginis8 Monocerotis10 Canis Minoris11 Hydrae13 Crateris13 Eridani13 Leporis14 Cancri14 Eridani14 Leonis15 Leporis16 Cancri17 Circini17 Pavonis18 Eridani20 Librae23 Eridani24 Geminorum24 Leonis24 Orionis25 Canis Majoris26 Monocerotis26–27 Crucis27 Geminorum32 Pictoris34 Eridani34 Fornacis36 Leonis38 Eridani38 Lyncis40 Eridani (40 Eridani A40 Eridani B40 Eridani C) • 43 Pavonis46 Orionis54 Geminorum54 Orionis59 Eridani65 Cancri65 Fornacis66 Geminorum67 Eridani67 Virginis70 Leonis70 Ophiucus74 Orionis75 Geminorum78 Geminorum78 Pavonis82 Eridani83 Leonis (83 Leonis A83 Leonis B) • 87 Tauri88 Eridani88 Pavonis89 Carinae94 Leonis111 Pavonis113 Pavonis127 Scorpii128 Pavonis128 Trianguli198 Eridani1020 Octantis1212 Muscae4403 Pavonis Beta Quadrant icon image.
Alpha and Beta Quadrant stars and star systems (C)
C-71C-111CaberhardtCada-XCaerulumCalibusCalidanCaliphCalkaCalthosCalufraxCalydonCambraCamporCamusCandidaCantosCapernaCapulonCarmara 712CarmolCarmunCarnerCarrayaCarrekCarsiukCarxalCasmusCaspanCaspanCassiopeia DeltaCastoraCastrolaCawleyCelethCelosCenturiCephenesCerberusCerebusCeriunCerkekCerkerCernenCernialCerralCersiunCersolCertax AlphaCerzomCerzosCeti AncitesCetusCevrincChapinCharulhCheron VIChi ScorpiiChiarosCholmondeleyChononChristofiChronianChrysalisCillersCita LagaClaneiaClavisClytomenesCogenColistarrComarConstinaCopernicusCorCordivalCorillCorolaCorosCorrekCorsenCorvidaeCossinaCryblonCrytoktsCulunCuralonCygnia MirosCymkoeCymonCynurCyonis Alpha and Beta Quadrant icon image.
Alpha Quadrant stars and systems (C) CaitCaldikCapellaCapricorn ArdayCardassiaCebelraiCeltrisCharaChi HerculisChin'tokaClarusCor CaroliCorwinCuellarCygnia MinorCzar'ak Alpha Quadrant icon image.
Beta Quadrant stars and systems (C) CalbridenCalderCaldosCanis MinorisCanopusCarinae DeltaCastorCestusCetiCeti AlphaChaltokCheron systems: Cheron (83 Leonis) (Cheron A, Cheron B) • Cheron (Omicron Gruis)Chi-1 OrionisChi'tanChironChortCiatellaCimeraCoridanCorvusCursaCygnet Beta Quadrant icon image.