description HD 99109 b Overview
HD 99109 b is a confirmed exoplanet orbiting the K-type star HD 99109. It is a gas giant with a mass comparable to Saturn and completes one orbit in roughly 440 days. The planet was detected through radial-velocity measurements and is associated with a relatively metal-poor host star, making the system useful for studying giant-planet formation around such stars.
help HD 99109 b FAQ
What type of planet is HD 99109 b?
HD 99109 b is a confirmed gas giant with a mass comparable to Saturn. It orbits the K-type star HD 99109.
How long is HD 99109 b's year?
HD 99109 b completes one orbit in roughly 440 days. That orbital period is measured from its motion around HD 99109.
How was HD 99109 b discovered?
Astronomers detected it through radial-velocity measurements. The method tracks changes in the host star's motion caused by the planet's gravity.
What is unusual about HD 99109's host star?
HD 99109 is a relatively metal-poor K-type star. The planet is therefore studied in the context of a gas giant orbiting a star with comparatively low heavy-element content.
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