Aldebaran(redirected from Alfa Tauri)
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Aldebaran (ălˌdĕbˈərən), brightest star in the constellation Taurus; Bayer designation α 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).”
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Aldebaran(al-deb -ă-răn) (α Tau) A conspicuous red giant that is the brightest star in the constellation Taurus and lies in the line of sight of but much nearer than the Hyades. It is a slow irregular variable. It has two companions: one of 11th magnitude at 122″ separation, the other of 13th magnitude at 30″. mv : 0.85 (var.); Mv : –0.3; spectral type: K5 III; radius (by interferometer): 45 times solar radius; distance: 18 pc.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
A red giant star of visual magnitude 1.06, spectral classification K5-III, in the constellation Taurus; the star α Tauri.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.