HD 217107 (6 G. Piscium) is a yellow subgiant star approximately 65 light-years away from Earth in the constellation of Pisces (the Fish). Its mass is very similar to the Sun's, although it is considerably older. Two planets have been discovered orbiting the star: one is extremely close and completes an orbit every seven days, while the other is much more distant, taking fourteen years to complete an orbit.

Distance, age, and mass

HD 217107 is fairly close to the Sun: the Gaia astrometric satellite measured its parallax as 49.7846 milliarcseconds, which corresponds to a distance of 65.51 light years.

  • Extrasolar Planet Interactions by Rory Barnes & Richard Greenberg, Lunar and Planetary Lab, University of Arizona