Microparsec

Microparsec (μpc) is a of  one-millionth of a, 30.857 s, 1.71545 s, or 0.206265. This unit can be used in alternative to astronomical units, gigameters, kilometers, and miles to measure companion distances from the star, such as s or companion s. For example, Earth's distance from the Sun is 4.85 μpc while the nearest known exoplanet is just 0.244 μpc from the parent star.