Zeta Ceti

Zeta Ceti is a binary star system in the equatorial constellation of Cetus. Its name is a Bayer designation that is Latinized from ζ Ceti, and abbreviated Zeta Cet or ζ Cet. The system has a combined apparent visual magnitude of 3.74, which is bright enough to be seen with the naked eye as a point of light. Based upon parallax measurements, it is approximately 253 light-years (78 pc) distant from the Earth. The system is drifting further from the Sun with a line of sight velocity component of +11 km/s.

Zeta Ceti is the primary or 'A' component of a double star system designated WDS J01515-1020 (the secondary or 'B' component is HD 11366). Zeta Ceti's two components are therefore designated WDS J01515-1020 Aa and Ab. Aa is officially named Baten Kaitos, the traditional name of the entire system.