Upsilon Andromedae d

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An artist version of Upsilon Andromedae D

Upsilon Andromedae d is an extrasolar planet. It orbits the Sun-like star Upsilon Andromedae A.

Upsilon Andromedae A was the third star known to host a multiple-planet planetary system, the others are the Sun and the pulsar PSR 1257+12.

In 1999, two groups of astronomers independently concluded that a three-planet model best fit the data.[1] The two new planets were designated Upsilon Andromedae c and Upsilon Andromedae d.

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