Pi

Its story

Pi Virginis is a binary in the zodiacal Virgin, 384 light-years away: two components orbiting each other every 283 days without resolving in any telescope. The primary is a rare metallic-lined Am star, white and hot at around eight thousand degrees, twice the Sun's mass and sixty-eight times its light. The companion, nearly half as massive, completes a pair invisible to the eye and perceptible only through the dance of its spectrum.