Proper names for planets outside of the Solar System – known as exoplanets – are chosen by the International Astronomical Union (IAU) through public naming contests known as NameExoWorlds.

Naming The IAU's names for exoplanets – and on most occasions their host stars – are chosen by the Executive Committee Working Group (ECWG) on Public Naming of Planets and Planetary Satellites, a group working parallel with the Working Group on Star Names (WGSN). Proper names of stars chosen by the ECWG are explicitly recognised by the WGSN. The ECWG's rules for naming exoplanets are identical to those adopted by the Minor Planet Center for minor planets. Names are a single word consisting of sixteen characters or less, pronounceable in some language, non-offensive, and not identical to existing proper names of astronomical objects. Copyrighted names, names of living individuals, and names with political or religious themes are blacklisted by the ECWG. In addition, the discoverer of a planet reserves the right to reject a proposed name for it.

Questionable planets Like the hypothesized Solar System planet Vulcan, which was named but turned out not to exist, the planetary status of a few named exoplanets has been challenged. Two have been refuted: Dagon, thought to be the first extrasolar planet discovered by visible-light imaging, was found in 2020 to be a debris cloud from a collision of asteroids rather than a planet. Orbitar, detected by radial velocity (RV), was found in 2025 to be due to intrinsic radial velocity variations in its host star.

Several others are disputed: Tondra was detected by radial velocity, so initially only a minimum mass was known. Its true mass is debated; a 2020 study found a mass large enough to be a star, but a 2026 study found a much smaller, planetary mass. Thestias, Spe, and Arkas have been questioned in the literature; they may be due to intrinsic stellar RV variations, but they have not been conclusively disproven.

List Name of planet Eponym Name of star Mass () Radius () Period (days) Semi-major axis (AU) Discovery Method Disc. year Distance (ly) Host star mass () Host star temp. (K) Remarks |- |Spe |"Hope" (Latin) |14 Andromedae (Veritate) |1.16 |3.559 |186.79 |0.775 | style="background:#0f0;"|radial vel. |2008 |248 |0.898 |4483 |2015 NameExoWorlds |- |Arion |Ancient Greek poet |18 Delphini (Musica) |9.207 | |993.3 |2.476 | style="background:#0f0;"|radial vel. |2008 |245 |2.35 |5071 |2015 NameExoWorlds |- |Arkas |Son of Zeus and Callisto in Greek myth |41 Lyncis (Intercrus) |1.654 | |183.93 |0.648 | style="background:#0f0;"|radial vel. |2008Dictionary.com, 'Arcas' |276 |1.07 |4,797 |2015 NameExoWorlds |- |Orbitar |Neologism |42 Draconis (Fafnir) |3.88 | |479.1 |1.19 | style="background:#0f0;"|radial vel. |2008 |317.3 |0.98 |4200 |2015 NameExoWorlds Later disproven (see text) |- |Taphao Thong | rowspan="2" |Thai folktale character | rowspan="2" |47 Ursae Majoris (Chalawan) |2.53 | |1078 |2.1 | style="background:#0f0;"|radial vel. |1996 | rowspan="2"|45.9 | rowspan="2"|1.03 | rowspan="2"|5892 |2015 NameExoWorlds |- |Taphao Kaew |0.54 | |2391 |3.6 | style="background:#0f0;"|radial vel. |2001 |2015 NameExoWorlds |- |Dimidium |"Half" (Latin) |51 Pegasi (Helvetios) |0.472 | |4.230785 |0.0527 | style="background:#0f0;"|radial vel. |1995 |50.1 |1.12 |5793 |First exoplanet discovered orbiting a main-sequence star 2015 NameExoWorlds |- |Galileo |Italian astronomer | rowspan="5" |55 Cancri A (Copernicus) |0.8306 | |14.65152 |0.115227 | style="background:#0f0;"|radial vel. |1996 | rowspan="5" |40.9 | rowspan="5" |0.91 | rowspan="5" |5196 |2015 NameExoWorlds |- |Brahe |Danish astronomer |0.1714 | |44.4175 |0.241376 | style="background:#0f0;"|radial vel. |2004 |2015 NameExoWorlds |- |Lipperhey |Dutch lensmaker |3.878 | |4825 |5.503 | style="background:#0f0;"|radial vel. |2002 |2015 NameExoWorlds |- |Janssen |Dutch astronomer |0.02542 |0.17 |0.736539 |0.01544 | style="background:#0f0;"|radial vel. |2004 |2015 NameExoWorlds |- |Harriot |English astronomer |0.141 | |262 |0.788 | style="background:#0f0;"|radial vel. |2007 |2015 NameExoWorlds |- |Ægir |God of the sea in Norse mythology |Epsilon Eridani (Ran) |1.55 | |2502 |3.39 | style="background:#0f0;"|radial vel. |2000 |10.5 |0.83 | |2015 NameExoWorlds |- |Amateru |Amaterasu, Japanese sun goddess |Epsilon Tauri (Ain) |7.6 | |594.9 |1.93 | style="background:#0f0;"|radial vel. |2006 |155.0 |2.7 |4901 |2015 NameExoWorlds |- |Dagon |Fertility god of Levantine mythology |Fomalhaut A

|555530 |160 |style="background:#FF6CDA"|imaging |2008 |25.1 |2 | |2015 NameExoWorlds Later disproven (see text) |- |Tadmor |Ancient Palmyrene Aramaic and modern Arabic name for Palmyra |Gamma Cephei A (Errai) |1.85 | |903.3 |2.05 | style="background:#0f0;"|radial vel. |2003 |45.0 |1.4 | |2015 NameExoWorlds |- |Meztli |Aztec god of the night and moon |HD 104985 (Tonatiuh) |6.33 | |199.505 |0.95 | style="background:#0f0;"|radial vel. |2003 |332.8 |1.6 |4786 |2015 NameExoWorlds |- |Smertrios |Gallic deity, sometimes equated with Roman Mars |HD 149026 (Ogma) |0.368 |0.813 |2.8758911 | | style="background:#0f0;"|radial vel. |2005 |257.2 |1.34 |6160 |2015 NameExoWorlds |- |Hypatia||Female Greek astronomer and philosopher |Iota Draconis (Edasich) |8.82|| ||511.098||1.275|| style="background:#0f0;"|radial vel.||2002||102.2||1.05||4530||2015 NameExoWorlds |- |Quijote | rowspan="4" |Characters from Don Quixote | rowspan="4" |Mu Arae (Cervantes) |1.676 | |643.25 |1.497 | style="background:#0f0;"|radial vel. |2000 | rowspan="4" |49.8 | rowspan="4" |1.08 | rowspan="4" |5807 |2015 NameExoWorlds |- |Dulcinea |0.03321 | |9.63 |0.09094 | style="background:#0f0;"|radial vel. |2004 |2015 NameExoWorlds |- |Rocinante |0.5219 | |310.55 |0.921 | style="background:#0f0;"|radial vel. |2004 |2015 NameExoWorlds |- |Sancho |1.814 | |4205.8 |5.235 | style="background:#0f0;"|radial vel. |2006 |2015 NameExoWorlds |- |Thestias |Greek myth |Pollux |2.3 | |589.64 |1.64 | style="background:#0f0;"|radial vel. |2006 |33.7 |2.1 |4946 |2015 NameExoWorlds |- |Saffar |Muslim astronomer | rowspan="3" |Upsilon Andromedae (Titawin) |0.6876 | |4.617033 |0.059222 | style="background:#0f0;"|radial vel. |1996 | rowspan="3" |43.9 | rowspan="3" |1.3 | rowspan="3" | |2015 NameExoWorlds |- |Samh |Muslim astronomer |1.981 | |241.258 |0.827774 | style="background:#0f0;"|radial vel. |1999 |2015 NameExoWorlds |- |Majriti |Muslim astronomer |10.25 | |1276.46 |2.51329 | style="background:#0f0;"|radial vel. |1999 |2015 NameExoWorlds |- |Fortitudo |"Fortitude" (Latin) |Xi Aquilae (Libertas) |2.8 | |136.75 |0.68 | style="background:#0f0;"|radial vel. |2007 |204.4 |2.2 |4780 |2015 NameExoWorldsDraugrNorse mythPSR B1257+12 (Lich)25.2620.19timing199423001.428,8562015 NameExoWorldsPoltergeistGerman folklore0.013566.54190.36timing19922015 NameExoWorldsPhobetorGreek myth0.012398.21140.46timing19922015 NameExoWorldsArberName for inhabitants of Albania during the Middle AgesHD 82886 (Illyrian)1.37051.65radial vel.2011407.72.5349532019 NameExoWorlds AlbaniaTassiliTassili n'Ajjer UNESCO World Heritage SiteHD 28678 (Hoggar)1.7387.11.24radial vel.2011622.71.7450762019 NameExoWorlds AlgeriaMadriuMadriu-Perafita-Claror Valley UNESCO World Heritage Site HD 131496 (Arcalís)2.28832.09radial vel.2011358.81.6149272019 NameExoWorlds AndorraNaqaỹa"brother-family-relative" in the Mocoví languageHD 48265 (Nosaxa)1.167001.51radial vel.20082850.932019 NameExoWorlds ArgentinaBocaprinsBoca Prins beach in Arikok National ParkWASP-39 (Malmok)0.281.274.0552590.0486transit2011750.20.9354002019 NameExoWorlds ArubaYanyan"boy" in the Boon wurrung languageHD 38283 (Bubup)0.34363.21.02radial vel.20111231.08559452019 NameExoWorlds AustraliaSissiCharacter from the 1955 Austrian film SissiHAT-P-14 (Franz)1.1501.24.6276570.0594transit2010668.61.38666002019 NameExoWorlds AustriaGanjaAncient capital of AzerbaijanHD 152581 (Mahsati)1.56891.48radial vel.2011606.70.92751552019 NameExoWorlds AzerbaijanTondra"nap" in BengaliHD 148427 (Timir)0.96331.50.93radial vel.20091931.4550522019 NameExoWorlds BangladeshEburoniaThe Eburones, a prominent Celtic tribeHD 49674 (Nervia)0.10.984.947390.058radial vel.20021331.0754822019 NameExoWorlds BelgiumDrukyulNative name of BhutanHD 73534 (Gakyid)1.1518003.15radial vel.2009316.31.2949522019 NameExoWorlds BhutanYvaga "paradise" in the Guaraní languageHD 63765 (Tapecue)0.643580.949radial vel.20091060.86554322019 NameExoWorlds BoliviaNaronAncient Celtic name for the Neretva river in the BalkansHD 206610 (Bosona)2.26101.68radial vel.2010632.71.5648742019 NameExoWorlds Bosnia and HerzegovinaGuaraniGuaraní people of southern Brazil, Paraguay, Uruguay, and ArgentinaHD 23079 (Tupi)2.45730.61.596radial vel.20011141.158482019 NameExoWorlds BrazilMastika"gem/jewel" in MalayHD 179949 (Gumala)0.921.053.09250.045radial vel.200088.11.2862602019 NameExoWorlds BruneiBendidaBendis, a Thracian goddessWASP-21 (Tangra)0.31.214.32251260.052transit2010750.21.0158002019 NameExoWorlds BulgariaNakanbéNakanbé river in Burkina Faso and GhanaHD 30856 A (Mouhoun)1.89122.0radial vel.2011385.21.3549822019 NameExoWorlds Burkina FasoAwasis"child" in the Cree language of CanadaHD 136418 (Nikawiy)2.0464.31.32radial vel.20103201.3350712019 NameExoWorlds CanadaCaleucheGhost ship from the Chilote mythology of southern ChileHD 164604 (Pincoya)1.998641.471.331radial vel.20101290.7746842019 NameExoWorlds ChileWangshuChinese goddess of the moonHD 173416 (Xihe)2.7323.61.16radial vel.2009440.32.046832019 NameExoWorlds ChinaMelquíadesCharacter from the novel One Hundred Years of Solitude by Gabriel García MárquezHD 93083 (Macondo)0.37143.580.477radial vel.200594.30.749952019 NameExoWorlds ColombiaPipiteaSmall pearls found in Penrhyn lagoonHD 221287 (Poerava)3.09456.11.25radial vel.20071731.2563042019 NameExoWorlds Cook IslandsDitsö̀Name given to the first Bribri people by the god Sibö̀ in Talamancan mythologyWASP-17 (Diwö)0.4861.9913.7354380.0515transit20091338.571.266502019 NameExoWorlds Costa RicaAsyeEarth goddess from Akan mythologyWASP-15 (Nyamien)0.5421.4283.75206560.0499transit200810051.1863002019 NameExoWorlds Côte d'IvoireVelesVeles, Slavic deity of earth, waters, and the underworldHD 75898 (Stribor)2.51418.21.19radial vel.2007262.81.2860212019 NameExoWorlds CroatiaFinlayCarlos Finlay, Cuban epidemiologistBD−17 63 (Felixvarela)5.1655.61.34radial vel.20081130.7447142019 NameExoWorlds CubaOnasilosOldest recorded doctor in CyprusHD 168746 (Alasia)0.236.4030.065radial vel.2002140.60.8856102019 NameExoWorlds CyprusMakropulosVěc Makropulos by Czech playwright Karel ČapekXO-5 (Absolutno)1.0771.034.18775370.0487transit2008831.70.8855102019 NameExoWorlds CzechiaSurtRuler of Muspelheim from Norse mythologyHAT-P-29 (Muspelheim)0.7781.1075.7231860.0667transit201110501.20760872019 NameExoWorlds DenmarkBoinayelBoinayel, god of rain from Taíno mythologyWASP-6 (Márohu)0.5031.2243.3610060.0421transit200810010.88854502019 NameExoWorlds Dominican RepublicEyeke"near" in the Waorani languageHD 6434 (Nenque)0.3921.9980.14radial vel.2000131.50.7958352019 NameExoWorlds EcuadorCayahuanca"rock looking at the stars" in NahuatlHD 52265 (Citalá)1.21119.270.52radial vel.2000911.261592019 NameExoWorlds El SalvadorHämarik"twilight" in EstonianXO-4 (Koit)1.6161.3174.124730.05485transit2008955.61.3257002019 NameExoWorlds EstoniaAbolFirst of three rounds in Ethiopian traditional coffee ceremonyHD 16175 (Buna)4.8996.42.2radial vel.20091961.3460482019 NameExoWorlds EthiopiaHiisiSacred localities and evil spirits from Finnic mythologyHAT-P-38 (Horna)0.2670.8254.6403820.0523transit2012812.10.88653302019 NameExoWorlds FinlandBélisamaBelisama, Gaulish goddess likened to the Roman MinervaHD 8574 (Bélénos)2.11227.550.77radial vel.20031441.1760802019 NameExoWorlds FranceMintomeFang word for a mythical land where a brotherhood of brave men liveHD 208487 (Itonda)0.413129.80.51radial vel.20041471.359292019 NameExoWorlds