Xi Arietis

| b-v = −0.10 | u-b = −0.48 | r-i = Xi Arietis is a binary star system in the northern constellation of Aries. Its name is a Bayer designation that is Latinized from ξ Arietis, and abbreviated Xi Ari or ξ Ari. This system has an apparent visual magnitude of 5.46, and so is dimly visible to the naked eye. Based upon an annual parallax shift of as seen from Earth, it is 770 ± distant from the Sun. At that distance, the visual magnitude is diminished by an extinction factor of 0.24 due to interstellar dust. The proximity of this system to the ecliptic means it is subject to lunar occultations.

This is a double-lined spectroscopic binary. The spectrum matches a stellar classification of B7 IV, which suggests a subgiant star that has exhausted the supply of hydrogen at its core and is in the process of evolving into a giant star. Xi Arietis was once a designation for Psi Ceti (ψ Cet, ψ Ceti), and was later recognized to be a duplicate by Bayer.