HD 5319 b is a
gas giant exoplanet
An exoplanet or extrasolar planet is a planet outside the Solar System. The first possible evidence of an exoplanet was noted in 1917 but was not recognized as such. The first confirmation of detection occurred in 1992. A different planet, init ...
discovered in 2007
in the
constellation
A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object.
The origins of the e ...
of
Cetus. This planet has a
minimum mass nearly two times that of
Jupiter
Jupiter is the fifth planet from the Sun and the List of Solar System objects by size, largest in the Solar System. It is a gas giant with a mass more than two and a half times that of all the other planets in the Solar System combined, but ...
. The planet has an almost circular orbit, with an
eccentricity of only 0.02 and a
period of 641 days. An additional planet in the system was discovered in 2015 and may be in a 4:3
mean motion resonance with planet b.
References
Cetus
Exoplanets discovered in 2007
Giant planets
Exoplanets detected by radial velocity
{{extrasolar-planet-stub
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