description HD 3651 b Overview
HD 3651 b is a giant exoplanet discovered through radial-velocity observations of the K-type star HD 3651. Reported in 2003, it has a mass broadly comparable to Saturn and follows an eccentric orbit around its host star. The wider system also contains HD 3651 B, a directly imaged T-dwarf brown-dwarf companion, making it a useful example of a system with both planetary and substellar companions.
help HD 3651 b FAQ
When was HD 3651 b discovered?
HD 3651 b was reported in 2003 after radial-velocity observations of the K-type star HD 3651. The planet was among the early giant exoplanets found around nearby stars.
What is HD 3651 b comparable to?
Its mass is broadly comparable to Saturn's, although the measured value is subject to the minimum-mass limitation of radial-velocity detection. It follows an eccentric orbit around its host star.
What is HD 3651 B?
HD 3651 B is a directly imaged stellar companion in the wider HD 3651 system. It is distinct from HD 3651 b, which is the inner planet detected through radial velocity.
How was HD 3651 b detected?
Astronomers detected it by measuring periodic shifts in the star's spectral lines. Those shifts show that HD 3651 moves back and forth under the planet's gravitational pull.
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