description HD 4308 b Overview
HD 4308 b is a low-mass exoplanet detected through the radial-velocity method around HD 4308, a metal-poor G-type star. Its minimum mass is about 14 times that of Earth, placing it near the boundary between super-Earth and Neptune-class planets. The system was reported in 2005, when planets of this mass around Sun-like stars were still uncommon.
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How massive is HD 4308 b?
HD 4308 b has a minimum mass of about 14 Earth masses. That places it near the boundary between the super-Earth and Neptune-mass categories.
What kind of star does HD 4308 b orbit?
It orbits HD 4308, a metal-poor G-type star. The star's low metal content makes the system useful for studying planet formation around chemically different Sun-like stars.
How was HD 4308 b detected?
HD 4308 b was detected through periodic radial-velocity changes in its host star. The discovery was reported in 2005.
Is HD 4308 b a super-Earth or a Neptune?
Its minimum mass lies near the dividing line, so either label can be used depending on the classification scheme. Without a measured radius and composition, mass alone cannot establish whether it is rocky or gas-rich.
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