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The following are lists of stars with confirmed extrasolar planets. For a list of planets awaiting confirmation see List of unconfirmed exoplanets. Note that the masses of the planets are (for the most part) lower bounds only. If a planet is detected by the radial velocity method, no information is gained about the inclination of the planet's plane of orbit around its star, and a value for this is needed to calculate the mass. It has become customary to assume arbitrarily that the plane is exactly lined up with the line of sight from Earth (this produces the lowest possible mass consistent with the spectral line measurements). There are 211 planets listed — 205 orbiting fusing stars (48 in multiple planet systems, and 157 in single planet systems), 4 orbiting pulsars, 1 orbiting a brown dwarf, and 1 free floating. The planets are listed with indications of their approximate masses as multiples of Jupiter's mass (MJ = 1.898 × 1027 kg) or multiples of Earth's mass (ME = 5.9737 × 1024 kg), and have approximate distances in astronomical units (1) AU = 1.496 × 108 km, distance between Earth and Sun) from their parent stars. For more information on how planets may be detected, see extrasolar planet. According to astronomical naming conventions, the official designation for a body orbiting a star is the star's catalogue number followed by a letter. The star itself is designated with the letter 'a', and orbiting bodies by 'b', 'c', etc. Some extrasolar planets have been given unofficial names, but these are not sanctioned by the International Astronomical Union which oversees astronomical naming, or used in the scientific literature.
Fusing stars There are currently 205 planets known in orbit around fusing stars. There are currently 157 known planets in single-planet systems and 48 known planets in 20 multiple-planet systems (14 with two planets, 4 with three and 2 with four). "Single" here means that only one planet has been detected to date. Since detection methods are not sensitive to low-mass planets, these stars may have smaller planets that are below the limits of detectability, or are so far from the star that they have not yet been observed over an orbital period. Sorted by increasing right ascension of the parent star. Planets within a system sorted by increasing orbital period. Pulsars There are currently four known planets orbiting two different pulsars. The planet of PSR B1620−26 is in a circumbinary orbit around a pulsar and a white dwarf star. Sorted by increasing right ascension of the parent pulsar. Planets within a system sorted by increasing orbital period. Brown dwarfs There is currently one known planet orbiting a brown dwarf. Sorted by increasing right ascension of the parent brown dwarf. Free floating planets There is currently one suspected free-floating planet, i.e. it doesn't appear to orbit a star. Sorted by increasing right ascension of the planet. See also | ||||||||
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