Tags: Planet.
HD 9578 b is an extrasolar planet which orbits the G-type main sequence star HD 9578 located approximately 187 light years away in the constellation Sculptor. This planet has at least five-eighths the mass of Jupiter and takes four-thirds years to orbit the star at a semimajor axis of 1.27 AU. However unlike most other known exoplanets its eccentricity is not known but it is typical that its inclination is not known.