Aldebaran ăl˝dĕb´ərən [key], brightest star in the constellation Taurus ; Bayer designation α Tauri; 1992 position R.A. 4 h35.5 m, Dec. +16°30′. An orange giant star ( spectral class K5 III) with apparent magnitude averaging 0.85, it is one of the 20 brightest stars in the sky. Aldebaran is a visual binary star and an irregular variable star , with magnitude ranging from 0.78 to 0.93. Its distance is 68 light-years. The name is from the Arabic meaning follower (of the Pleiades).

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