Alpha Tauri


Distance (Light Years) 65.1 ± 1.2
Apparent Magnitude 0.87
Color (B-V)1.54

Names For This Star

"Aldebaran" comes from the Arabic name Al Dabaran which means "The Follower". The origin of the name is apparently that the star, which is the brightest member of the Hyades, follows after the Pleiades as the sky appears to turn.

Aldebaran is also known by the Latin name Cor Tauri, meaning "The Heart of the Bull" and by the Latin name Parilicium, a name connected with a festival for a rural goddess - see Allen.

Description of the Star

Aldebaran is an orange K5III almost 50 times the diameter of the sun. This spectral type corresponds to an effective temperature of 3800 K and around 200 times the luminosity of the sun. The mass of the star should be about 25 times the mass of our own sun.

Aldebaran has an M2 dwarf companion visible at 31 arc sec distance.

Other Designations For This Star


87 Tauri

Hipparcos Identifier (HIP Number)


Harvard Revised (HR Number)


Henry Draper Catalog (HD Number)


Bonner Durchmusterung (BD Number)

BD+16 629
Smithsonian Astrophysical
Observatory compendium (SAO Number)

Fundamental Katalog (FK5 Number)



Copyright © 1998 - 2010 by Arnold V. Lesikar,
Professor Emeritus
Dept. of Physics, Astronomy, and Engineering Science,
St. Cloud State University,St. Cloud, MN 56301-4498

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