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.
- Host star: 51 Pegasi (51 Peg).
- Discovery: by the radial velocity method in 1995.
- 50.4 ly - distance.
- 0.05 AU - orbital radius.
- 4.2 days - orbital period.
- 1.5 - radius in Jupiter radii.
- 0.46 - Jupiter masses.
- 1284 K - predicted temperature.
(exoplanet,RV method,gas giant)
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|~0||15.5pc||50.4ly||51 Pegasi b|
|Coordinates:||51 Peg b|
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