Xi-1

Its story

ξ¹ Ceti dwells in the sea-monster Cetus, on the celestial equator. It is a binary system 383 light-years away whose true nature was revealed in 1901 by William Wallace Campbell with the spectrograph at Lick Observatory. The two stars orbit each other in a near-perfect circle every 4.5 years, separated by less than four astronomical units. The primary is a yellow giant with a touch of barium in its atmosphere.