You discover a new extra-solar planet orbiting a 1 solar mass star using high spatial resolution imaging and adaptive optics in the infrared part of the spectrum. The star is at a distance of 40 pc.
What is the planet-star separation if you measure an angular separation of 0.6" (arc-seconds)?
What is the approximate orbital period of this star assuming a circular orbit viewed face-on (at 0 inclination angle)?