Eta Ursae Majoris


Distance (Light Years) 100.7 ± 2.3
Apparent Magnitude 1.85
Color (B-V)-0.19

Names For This Star

This star is also known as Benetnash, Benetnasch, or Elkeid. All the names for this star derive from the Arabic phrase Al Ka'id Banat al Na'ash, which means literally "the Governor of the Daughters of the Bier", that is, "The Chief of the Mourners." The mourners in Arabic poetry seem to have been the three stars of the handle of the Big Dipper: Alkaid, Mizar, and Alioth.

Description of the Star

Alkaid is a blue B3V main sequence star. This spectral type indicates an effective temperature of 9100 K, a diameter twice that of the sun, and a luminosity 4300 times that of the sun, and a mass perhaps 13 times that of the sun.

Other Designations For This Star


85 Ursae Majoris

Hipparcos Identifier (HIP Number)


Harvard Revised (HR Number)


Henry Draper Catalog (HD Number)


Bonner Durchmusterung (BD Number)

BD+50 2027
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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