Tags: Planet.
91 Aquarii b also known as HD 219449 b is an extrasolar planet orbiting in the 91 Aquarii system approximately 148 light-years away in the constellation of Aquarius. It orbits at the average distance of 48.5 Gm from its star which is closer than Mercury is to the Sun (57.9 Gm). The planet takes half a year to revolve around the star in a very circular orbit (e=0.003).
