description HD 12661 c Overview
HD 12661 c is the outer confirmed planet in the HD 12661 system, which is associated with a Sun-like star. It was detected by observing periodic changes in the star’s radial velocity and has a minimum mass in the giant-planet range. Its orbit lasts several years, making it more distant and slower-moving than HD 12661 b. The system is used in studies of multi-planet orbital dynamics and the distribution of giant planets around mature stars.
help HD 12661 c FAQ
What is HD 12661 c?
HD 12661 c is the outer confirmed planet in the HD 12661 system, associated with a Sun-like star. It is a giant planet detected from the star's changing radial velocity.
How long does HD 12661 c take to orbit its star?
Its orbit lasts several years. That long period makes the planet's signal slower and requires extended observations to separate it from shorter-period effects.
How was HD 12661 c discovered?
Astronomers observed periodic changes in the radial velocity of the host star. Those changes revealed the gravitational influence of the outer planet.
Is HD 12661 c closer to its star than HD 12661 b?
No. HD 12661 c is the outer confirmed planet, while HD 12661 b is the inner planet. The letter c identifies the later planet in the system, not necessarily the larger one.
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