Iota Draconis b
Encyclopedia
Iota Draconis b was discovered in 2002 during a radial velocity
study of K-class giant stars and was the first planet
discovered orbiting a giant star
. It is in an eccentric orbit, which aided its detection as giant stars have pulsations which can mimic the presence of a planet.
Radial velocity
Radial velocity is the velocity of an object in the direction of the line of sight . In astronomy, radial velocity most commonly refers to the spectroscopic radial velocity...
study of K-class giant stars and was the first planet
Extrasolar planet
An extrasolar planet, or exoplanet, is a planet outside the Solar System. A total of such planets have been identified as of . It is now known that a substantial fraction of stars have planets, including perhaps half of all Sun-like stars...
discovered orbiting a giant star
Giant star
A giant star is a star with substantially larger radius and luminosity than a main sequence star of the same surface temperature. Typically, giant stars have radii between 10 and 100 solar radii and luminosities between 10 and 1,000 times that of the Sun. Stars still more luminous than giants are...
. It is in an eccentric orbit, which aided its detection as giant stars have pulsations which can mimic the presence of a planet.