Zeta Tauri

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ζ Tauri

Epoch J2000.0
Constellation	Taurus
Right ascension	05h 37m 38.7s
Declination	+21° 08' 33"
Distance	417 ± 54 ly (128 ± 17 pc)
Spectral type	B4IIIpe+G8III
Apparent magnitude	+2.97
Other designations
123 Tauri, HR 1910, HD 37202, BD+21 908, FK5 211, HIP 26451, SAO 77336, GC 6985

Zeta Tauri (ζ Tau / ζ Tauri) is a binary star in the constellation Taurus.

Zeta Tauri is a blue-white B-type giant star approximately 417 light years from Earth. It is classified as a Gamma Cassiopeiae type variable star. Its brightness varies from magnitude +2.88 to +3.17 due to both its intrinsic variablility, and also because it is an eclipsing binary. The two components of the binary system are separated by approximately one Astronomical Unit and complete an orbit once every 133 days. The companion star is a yellow G-type star, which has a magnitude of +5.2.