Zeta Andromedae

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Zeta Andromedae (ζ And / ζ Andromedae) is a star system in the constellation Andromeda. It is approximately 181 light years from Earth.

Zeta Andromedae is an eclipsing spectroscopic binary which is classified as an orange K-type bright giant with a mean apparent magnitude of +4.08. In addition to brightness variation due to eclipses, the system is also an RS Canum Venaticorum type or Beta Lyrae type variable star. Its brightness varies from magnitude +3.92 to +4.14 with a period of 17.77 days. The orbital period of the binary is 17.77 days.

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