Astrophysics (Index)About

51 Pegasi b

(51 Peg b)
(first exoplanet found orbiting a main sequence star)

51 Pegasi b (51 Peg b) is a hot Jupiter of at least half a Jupiter mass, orbiting a G-type star, but close to the star with an orbital period of a little more than 4 Earth days. It was identified in 1995 using the radial velocity method and was the first extra-solar planet discovered that orbits a main sequence star. Its orbital radius and its mass are derived from the star's radial velocity differences and the star's mass as suggested by its spectral type. Other planet characteristics ascribed to it are reasoned from these. Characteristics:


(exoplanet,RV method,gas giant)
Further reading:
http://en.wikipedia.org/wiki/51_Pegasi_b
http://en.wikipedia.org/wiki/51_Pegasi
https://exoplanets.nasa.gov/resources/289/infographic-profile-of-planet-51-pegasi-b/
RedshiftParsecs
/Distance
Lightyears
/Lookback Years
  
~015.5pc50.4ly51 Pegasi b
Coordinates:51 Peg b
J225727.9804+204607.7822

Referenced by pages:
rotation period

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