description Upsilon Andromedae d Overview
Upsilon Andromedae d is a gas-giant exoplanet in the multi-planet Upsilon Andromedae system, orbiting an F-type star about 44 light-years away. Its minimum mass is several times that of Jupiter, and its orbit takes roughly three and a half years, placing it well beyond the system’s inner planets. The planet was detected by the radial-velocity method, which measures the host star’s motion rather than the planet’s reflected or emitted light.
help Upsilon Andromedae d FAQ
What kind of planet is Upsilon Andromedae d?
Upsilon Andromedae d is a gas giant whose minimum mass is several times that of Jupiter. It is part of a multi-planet system around the F-type star Upsilon Andromedae.
How long is a year on Upsilon Andromedae d?
Its orbit takes roughly three and a half years. That makes it an outer planet in its system, though its orbit is still much tighter than Neptune's around the Sun.
How far away is Upsilon Andromedae?
The system is about 44 light-years from Earth. Its host is an F-type star, which is hotter and more luminous than the Sun.
How was Upsilon Andromedae d detected?
It was detected through the radial-velocity method, which measures the star's movement caused by the planet's gravity. This method provides a minimum mass rather than the planet's exact mass unless the orbital inclination is known.
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