NameExoWorlds (also known as IAU NameExoWorlds) is the name of various projects managed by the International Astronomical Union (I.A.U.) to encourage names to be submitted for astronomical objects, which would later be considered for official adoption by the organization.
The first such project (NameExoWorlds I), in 2015, regarded the naming of stars and exoplanets. [1] 573,242 votes were submitted by members by the time the contest closed on October 31, 2015, and the names of 31 exoplanets and 14 stars were selected from these. [2] Many of the names chosen were based on world history, mythology and literature. [3] In June 2019, another such project (NameExoWorlds II), in celebration of the organization's hundredth anniversary, in a project officially called IAU100 NameExoWorlds, [4] [5] welcomed countries of the world to submit names for exoplanets and their host stars. [6] [7] A star with an exoplanet was assigned to each country, and members of the public submitted names for them.
In August 2022, the third NameExoWorlds project was announced, which gave names to 20 exoplanets and their host stars, all of which are targets for observation by the James Webb Space Telescope. [8] The names were announced in June 2023. [9]
The International Astronomical Union is an international non-governmental organization (INGO) with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach, education, and development through global cooperation. It was founded on 28 July 1919 in Brussels, Belgium and is based in Paris, France.
PSR B1257+12, previously designated PSR 1257+12, alternatively designated PSR J1300+1240, is a millisecond pulsar, 2,300 light-years from the Sun, in the constellation Virgo, rotating at about 161 times per second. It is also named Lich, after a powerful, fictional undead creature.
Epsilon Tauri or ε Tauri, formally named Ain, is an orange giant star located approximately 146 light-years from the Sun in the constellation of Taurus. An exoplanet is believed to be orbiting the star.
14 Andromedae, abbreviated 14 And, also named Veritate, is a single, orange-hued giant star situated approximately 247 light-years away in the northern constellation of Andromeda. It is dimly visible to the naked eye with an apparent visual magnitude of 5.22. The star is moving closer to the Earth with a heliocentric radial velocity of −60 km/s. In 2008 an extrasolar planet was discovered to be orbiting the star.
Pollux b, formally named Thestias, is an exoplanet candidate orbiting the star Pollux approximately 34 light-years away in the constellation of Gemini. It is also designated β Geminorum b or HD 62509 b. If this planet exists, it has a minimum mass of about twice the mass of Jupiter, and it moves around Pollux in 1.61 years at a distance of 1.64 AU in a nearly circular orbit. However, its existence has been disputed.
Mu Arae e, also known as HD 160691 e, later named Sancho, is one of the four extrasolar planets orbiting the star Mu Arae of the constellation Ara.
Mu Arae d, also known as HD 160691 d, formally named Rocinante, is an extrasolar planet orbiting the star Mu Arae of the constellation Ara.
55 Cancri f, also designated Rho1 Cancri f and formally named Harriot, is an exoplanet approximately 41 light-years away from Earth in the constellation of Cancer. 55 Cancri f is the fourth known planet from the star 55 Cancri and the first planet to have been given the designation of "f".
HD 45652 is a star with an exoplanetary companion in the equatorial constellation of Monoceros. It was officially named Lusitânia on 17 December 2019, after the IAU100 press conference in Paris by the IAU. This star has an apparent visual magnitude of 8.10, making it an 8th magnitude star that is too dim to be visible to the naked eye. The system is located at a distance of 114 light-years from the Sun based on parallax measurements, but is drifting closer with a radial velocity of −5 km/s. It shows a high proper motion, traversing the celestial sphere at an angular rate of 0.188 arcsec yr−1.
14 Andromedae b, formally named Spe, is an exoplanet approximately 249 light years away in the constellation of Andromeda.
42 Draconis, formally named Fafnir, is a 5th magnitude K-type giant star located approximately 295 light years away in the constellation of Draco. As of 2009, an extrasolar planet is thought to be orbiting the star.
42 Draconis b, formally named Orbitar, is a candidate extrasolar planet located approximately 315 light years from Earth in the constellation of Draco. It orbits the 5th magnitude K-type giant star 42 Draconis with a period of 479 days and 38% orbital eccentricity. The planet was discovered using the radial velocity method on March 20, 2009.
HIP 12961 is a star with an exoplanetary companion in the equatorial constellation of Eridanus. It is too faint to be visible to the naked eye, with an apparent visual magnitude of 10.24. The distance to this system can be estimated from its parallax measurements, which yield a separation of 76.4 light-years from the Sun. It is receding with a radial velocity of +33 km/s and has a high proper motion, traversing the celestial sphere at an angular rate of 0.300″ yr−1.
WASP-39b, officially named Bocaprins, is a "hot Jupiter" extrasolar planet discovered in February 2011 by the WASP project, notable for containing a substantial amount of water in its atmosphere. In addition WASP-39b was the first exoplanet found to contain carbon dioxide in its atmosphere, and likewise for sulfur dioxide.
HD 1502 is an 8th-magnitude K-type subgiant star in the constellation of Pisces, located at a distance of approximately 630 light-years. A super-Jupiter planet, HD 1502 b, is known to orbit the star.
HD 30856 is a binary system between HD 30856 A, a K-type giant star, and HD 30856 B, a red dwarf companion, located in the constellation of Eridanus about 430 light-years distant. A super-Jupiter exoplanet, HD 30856 b, is known to orbit the primary star.
HD 96063 is a 8th-magnitude red-giant branch star located about 454 light-years (139 pc) away in the constellation of Leo. It is orbited by one confirmed exoplanet, HD 96063 b, a gas giant slightly larger and more massive than Jupiter.
HD 18742 is a 8th-magnitude subgiant star located about 530 light-years (160 pc) away in the constellation of Eridanus. It is orbited by one confirmed exoplanet, super-Jupiter HD 18742 b, and possibly by another Jovian planetary candidate.