description Upsilon Andromedae c Overview
Upsilon Andromedae c is a giant exoplanet orbiting the F-type star Upsilon Andromedae. Announced in 1999 from radial-velocity observations, it completes an orbit in roughly 241 days and is one of several giant planets known in the system. Those discoveries established Upsilon Andromedae as an early example of a multiplanet system around a main-sequence star and enabled detailed study of interactions between planetary orbits.
help Upsilon Andromedae c FAQ
How long is a year on Upsilon Andromedae c?
Upsilon Andromedae c completes an orbit in roughly 241 Earth days. It is a giant planet orbiting the F-type star Upsilon Andromedae.
When was Upsilon Andromedae c discovered?
Upsilon Andromedae c was announced in 1999 from radial-velocity observations. Its discovery was part of the early work showing that other stars can host systems of multiple giant planets.
Is Upsilon Andromedae c the only planet in its system?
No, it is one of several known giant planets in the Upsilon Andromedae system. The system helped establish that planetary systems can have multiple large planets on different orbits.
How was Upsilon Andromedae c detected?
Its presence was inferred from the periodic motion of Upsilon Andromedae caused by the planet's gravity. This radial-velocity signal does not require the planet to transit across the star.
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