Alpha Persei


Distance (Light Years) 592 ± 71
Apparent Magnitude 1.79
Color (B-V)0.48

Names For This Star

Other names for this star are Mirphak, Marfak, or Algenib.

Algenib derives from the Arabic Al Janb, "The Side". Mirfak, Mirphak, and Marfak derive from an Arabic word meaning "Elbow."

Description of the Star

Mirfak is a yellowish F5Ib supergiant star having about 5000 times the luminosity of the sun. The spectral type implies a diameter about 80 times that of the sun, and a mass about 11 times that of the sun.

Mirfak is a member of a cluster of at least 124 according to Burnham.

Other Designations For This Star


33 Persei

Hipparcos Identifier (HIP Number)


Harvard Revised (HR Number)


Henry Draper Catalog (HD Number)


Bonner Durchmusterung (BD Number)

BD+49 917
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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