The Columbia Encyclopedia, Sixth Edition. 2001-07.
Aldebaran
(l´´db´rn) (KEY) , brightest star in the constellation Taurus; Bayer designation Tauri; 1992 position R.A. 4h35.5m, 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).