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The ECWG's rules for naming exoplanets are identical to those adopted by the Minor Planet Center for minor planets. [2] 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 . [ 3 ]
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]
For exoplanets orbiting a single star, the name is normally formed by taking the name of its parent star and adding a lowercase letter. A provisional IAU-sanctioned standard exists to accommodate the naming of planets that orbit two stars, which are known as circumbinary planets. A limited number of exoplanets have IAU-sanctioned proper names.
On its discovery, the planet was designated PSR 1257+12 A and later PSR B1257+12 A. It was discovered before the convention that extrasolar planets receive designations consisting of the star's name followed by lower-case Roman letters starting from "b" was established. [6]
Motion interpolation of seven images of the HR 8799 system taken from the W. M. Keck Observatory over seven years, featuring four exoplanets. This is a list of extrasolar planets that have been directly observed, sorted by observed separations. This method works best for young planets that emit infrared light and are far from the glare of the star.
The name J1407b follows the exoplanet naming convention by adding the letter "b" after the host star's name. [5] At the time of J1407b's discovery, V1400 Centauri was known as "J1407", which is the shortened form of the star's full SuperWASP catalogue designation 1SWASP J140747.93–394542.6.
First exoplanet to be discovered orbiting a main-sequence star. [188] Prototype of the hot Jupiters. HR 8799 e: 1.17 +0.13 −0.11 [189] ← 9.6 +1.9 −1.8 [190] First exoplanet to be directly observed using optical interferometry. HR 8799 system is also the first directly imaged planetary system having multiple exoplanets. TRAPPIST-1: 1.16 ± ...
The individual planet data pages also contain the data on the parent star, including name, distance in parsecs, spectral type, effective temperature, apparent magnitude, mass, radius, age, and celestial coordinates (Right Ascension and Declination).