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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). [1] Proper names of stars chosen by the ECWG are explicitly recognised by the WGSN. [1]
PSR B1620-26 b is an exoplanet located approximately 12,400 light-years from Earth in the constellation of Scorpius.It bears the unofficial nicknames "Methuselah" and "the Genesis planet" (named after the Biblical character Methuselah, who, according to the Bible, lived to be the oldest person) due to its extreme age.
2MASS J04414489+2301513 b is listed as the youngest planet in the NASA Exoplanet Archive, at an age of 1 Myr, [1] but fails the mass ratio criterion of the IAU working definition of an exoplanet; the mass ratio with the primary is larger than the L4/L5 limit of stability ≈ 1/25 [62] and the companion is 'more likely to have been produced by ...
Longest transit orbital period of any confirmed transiting exoplanet discovered at the duration of 1107 days [227] and largest circumbinary planet discovered. [228] This planet is located within the habitable zone of binary star system Kepler-1647 and thus could theoretically have a habitable Earth-like exomoon .
There are eight planets within the Solar System; planets outside of the solar system are also known as exoplanets. Artist's concept of the potentially habitable exoplanet Kepler-186f As of 27 February 2025, there are 5,839 confirmed exoplanets in 4,359 planetary systems , with 979 systems having more than one planet . [ 1 ]
The exoplanet is a gas giant, similar in size to Jupiter, and has an orbital period of 1107 days. [3] This is the longest transit period of any confirmed transiting Kepler exoplanet discovered yet. [2] It is also the largest circumbinary Kepler planet known. [3] It is 483±206 times more massive than Earth, and 1.52±0.65 times Jupiter's mass. [1]
Kepler-421b is an exoplanet that, as of July 2014, [1] has the longest known year of any transiting planet (704 days), [2] although not as long as the planets that have been directly imaged, or many of the planets found by the radial-velocity method, or as long as some transiting planet candidates which are listed as planets in the Extrasolar Planets Encyclopaedia (KIC 5010054 b etc.). [3]
TrES-4b is an exoplanet, one of the largest exoplanets ever found. It was discovered in 2006, and announced in 2007, by the Trans-Atlantic Exoplanet Survey , using the transit method . It is approximately 1,400 light-years (430 pc ) away orbiting the star GSC 02620-00648 , in the constellation Hercules .